NEOPROBE CORP
10-K405, 2000-03-30
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                           --------------------------
                                    FORM 10-K

                        FOR ANNUAL AND TRANSITION REPORTS
                     PURSUANT TO SECTIONS 13 OR 15(d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934
(Mark One)
|X| ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d ) OF THE SECURITIES EXCHANGE
ACT OF 1934 For the fiscal year ended: December 31, 1999
                                       OR
|_|  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934
      For the transition period from _________________ to _______________.

                         Commission file number: 0-26520
                              NEOPROBE CORPORATION
- -------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)

<TABLE>
<S>                                                                                 <C>
                           DELAWARE                                                            31-1080091
- ----------------------------------------------------------------                    ---------------------------------
(State or Other Jurisdiction of Incorporation or Organization)                      (I.R.S. Employer Identification
                                                                                                  No.)
        425 Metro Place North, Suite 300, Dublin, Ohio                                         43017-1367
- ----------------------------------------------------------------                    ---------------------------------
           (Address of Principal Executive Offices)                                            (Zip Code)
</TABLE>

Registrant's telephone number, including area code: (614) 793-7500 Securities
registered pursuant to Section 12(b) of the Act: None Securities registered
pursuant to Section 12(g) of the Act:

                     Common Stock, par value $.001 per share
- --------------------------------------------------------------------------------
                                (Title of Class)

        Rights to Purchase Series A Junior Participating Preferred Stock
- --------------------------------------------------------------------------------
                                (Title of Class)

    Indicate by check mark whether the Registrant: (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.

                                 Yes |X| No |_|

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein and will not be contained, to the best
of Registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. |X|

The aggregate market value of shares of common stock held by non-affiliates of
the Registrant on March 24, 2000 was $41,171,517.

The number of shares of common stock outstanding on March 24, 2000 was
26,071,777.

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<PAGE>   2

                                     PART I


ITEM 1.  DESCRIPTION OF BUSINESS


DEVELOPMENT OF THE BUSINESS


Neoprobe Corporation, a Delaware corporation ("Neoprobe" or the "Company"), was
incorporated in the State of Ohio in 1983 and reincorporated in the State of
Delaware in 1988. The Company's executive offices are located at 425 Metro Place
North, Suite 300, Dublin, Ohio 43017-1367. The telephone number at that address
is (614) 793-7500.


Since inception, substantially all of the Company's efforts and resources have
been devoted to research and clinical development of innovative systems for the
intraoperative diagnosis and treatment of cancers. Prior to 1998, the Company's
primary research and development efforts were related to its proprietary RIGS(R)
(radioimmunoguided surgery) technology. However, research and development
efforts since early 1997 have also included development as well as market launch
activities related to gamma radiation detection instrumentation used in the
application of intraoperative lymphatic mapping ("ILM") and development
activities related to an activated cellular therapy ("ACT") methodology for the
treatment of certain cancers and viral diseases. However, due to regulatory and
financial considerations, the Company suspended ongoing research and development
for RIGS and ACT during 1998 to allow the Company to focus its resources
primarily on its ILM initiative and related procedural product development and
commercialization activities while efforts were made to identify and secure
development partners to assume financial and regulatory responsibility for
developing and commercializing RIGS and/or ACT.


The Company entered into a distribution arrangement with Ethicon Endo-Surgery,
Inc. ("EES"), a Johnson & Johnson company, effective October 1, 1999 to
distribute the Company's line of gamma guided surgical instruments on an
exclusive worldwide basis. In connection with entering into this arrangement,
the Company received a $4 million nonrefundable up-front license payment that
significantly improved the Company's financial condition. The Company also
severed the majority of its internal marketing personnel subsequent to entering
into the EES arrangement to more correctly align the Company's staffing levels
with the research and development, regulatory and manufacturing responsibilities
inherent to a medical device manufacturer with a distribution alliance.


During 1998, the Company also undertook a series of restructuring activities
consistent with its change in strategic direction to focus corporate efforts on
ILM. These activities involved headcount reductions during the first and fourth
quarters of 1998 as well as the shutdown of the Company's two majority-owned
international subsidiaries. The 1998 restructuring activity was precipitated
primarily by the Company's failure to gain regulatory marketing clearance of its
proprietary RIGS technology. In 1995 and 1996, the Company completed a series of
clinical trials of its first generation targeting agent for the detection of
colorectal cancer, RIGScan(R) CR49. Also during 1996, the Company submitted
applications to European and U.S. regulatory agencies requesting approvals to
begin marketing RIGScan CR49 for the detection of metastatic colorectal cancer.
Late in the fourth quarter of 1997, the Company received requests for further
information from United States and European regulatory agencies following review
of its applications. Consequently, during the first half of 1998, the Company
initiated a series of changes to its business plan to reduce operating expenses
and refocus activities on ILM while efforts were made to identify and secure a
development partner to take in financial and regulatory responsibility for
continuing to develop RIGS and ACT.


Neoprobe's current strategy is to commercialize gamma-guided surgery products
based upon technologies that are patented or exclusively licensed by the Company
for diagnosis and treatment of patients with cancer. The Company has suspended
research and development activities related to its RIGS or ACT products until it
finds partners who will take on the clinical, regulatory and financial
activities related to further product development.



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THE COMPANY'S TECHNOLOGY


Intraoperative Lymphatic Mapping and Other Gamma Guided Surgery Instrument
Applications


Surgeons use lymphatic mapping to help trace the lymphatic patterns in a cancer
patient to evaluate potential tumor drainage and cancer spread. The technique
does not detect cancer; it helps surgeons find the first lymph node(s) to which
tumor is likely to drain and spread. That node (sometimes referred to as the
"sentinel" node) may provide critical information about the stage of a patient's
disease. Intraoperative lymphatic mapping begins when a patient is injected at
the site of the main tumor with a commercially available radioactive tracing
agent; e.g., filtered sulfur colloid labeled with Technetium-99m, a radioactive
element. The agent is intended to follow the same lymphatic flow as the cancer
would if it had metastasized. The surgeon may then track the agent's path with
the probe, thus following the potential avenues of metastases and identifying
lymph nodes to be biopsied for evaluation and determination of cancer spread.
Lymphatic mapping gives surgeons a "road map" to find the sentinel nodes to
which tumor is likely to drain or spread. Numerous clinical studies involving
nearly two thousand patients, published in peer-review medical journals, have
shown ILM is 97% accurate in predicting the presence or absence of disease
spread in melanoma or breast cancers. As a result, over 80% of patients who
would have undergone lymphadenectomies can be spared this radical surgical
procedure.


Surgeons practicing ILM have found that the Company's gamma-detecting probes are
well suited to the procedure. The Company's patented instruments consist of
hand-held gamma-ray-detection probes and a software-driven control unit. The
detection device in the tip of the probe is a highly radiosensitive crystal that
relays a signal through a preamplifier to the control unit to produce both a
digital readout and an audible signal. The detector element fits in a housing
approximately the size of a pocket flashlight. During 1997, the Company launched
an enhanced gamma detector, the Neoprobe(R) 1500 portable radioisotope detector,
in response to the emergence of ILM, and in late 1998 the Company launched a new
system, the neo2000(TM). The neo2000 device is intended to be the cornerstone of
Neoprobe's future ILM instrument products.


Lymphatic mapping has become the standard of care for treating patients with
melanoma at many institutions. The Company has supported this initiative through
training support, technical expertise and device placement. For cutaneous
malignant melanoma, lymphatic mapping was recently declared the standard of care
by the World Health Organization. For breast cancer, the technique is moving
toward standard of care status in major cancer centers and is being confirmed in
several high profile, national, and international clinical trials. Several large
multi-center clinical trials are currently underway, including studies sponsored
by the U.S. Department of Defense and the National Institute of Health. In
addition to lymphatic mapping, surgeons are using Neoprobe's device for other
gamma guided surgery applications, such as evaluating the thyroid function, the
intraoperative localization of osteoid osteomas (small painful bone lesions) and
in the surgical biopsy of suspected spread of cancer to the bone (osseous
metastases). Surgeons have also found the technique useful in staging patients
with vulvar, prostate, and penile cancers. Additional applications of the
technology are being investigated.


The Company, in conjunction with its distribution partner, EES, continues to
work with thought leaders in the surgical community to set up and support
training courses internationally for lymphatic mapping. Courses showcasing the
Company's instruments have been held at many nationally and internationally
renowned cancer-specializing and teaching institutions such as M.D. Anderson
Cancer Center, the University of Washington, the Netherlands Cancer Institute,
the University of Louisville, and the University of California at San Francisco.


The Company is currently selling the Neoprobe 1500 and neo2000 instruments
through EES for use in lymphatic mapping and other gamma guided surgery
applications and is expanding its line of instruments to provide a variety of
gamma-detecting probes for other specialized uses. The growing use of the
lymphatic mapping technique by surgeons has helped generate revenue for the
Company of approximately $9.4 million in revenue during 1999. See "Management's
Discussion and Analysis of Financial Condition and Results of Operations."



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Neoprobe's ILM business strategy will be designed around the following
objectives:

- -    Providing cost effective technology to reduce patient morbidity and allow
     the ILM procedure to be done in an outpatient setting.

- -    Increasing the Company's market position in device sales for intraoperative
     lymphatic mapping and other gamma guided surgery applications by expanding
     and improving its ILM devices, and completing strategic marketing
     partnerships to globalize its technology.

- -    Evaluating procedural ILM product opportunities, including disposable
     products and the development of minimally invasive radiation detection
     devices. In addition, Neoprobe will support the activities of thought
     leaders in evaluating the use of ILM in the treatment of prostate and other
     cancers.


The RIGS Technology


From inception until 1998, Neoprobe devoted significant efforts and resources to
the development of its proprietary RIGS technology. The RIGS system combines a
patented hand-held gamma radiation detection probe, proprietary radiolabeled
cancer targeting agents, and a patented surgical method to provide surgeons with
real-time information to locate tumor deposits not detectable by conventional
methods, and to assist in more thorough removal of the cancer. The Company's
targeting agents are monoclonal antibodies or peptides, labeled with a
radioactive isotope that emits low energy gamma rays. Before surgery, a cancer
patient is injected with one of the targeting agents which circulates throughout
the patient's body and binds specifically to cancer cell antigens or receptors.
Concentrations of the targeting agent are then located during surgery by
Neoprobe's gamma-detecting instrument, which emits an audible tone to direct the
surgeon to targeted tissue.


From 1992 through 1996, more than 700 patients participated in several phases of
clinical trials for surgical detection of primary and metastatic colorectal
cancer using the Company's lead product, RIGScan(R) CR49. In 1996, Neoprobe
submitted applications to the European Agency for the Evaluation of Medicinal
Products ("EMEA") and the United States Food and Drug Administration ("FDA") for
marketing approval of RIGScan CR49 for the detection of metastatic colorectal
cancer. Following review of its applications, the Company received requests for
further information from the FDA and from the European Committee for Proprietary
Medicinal Products ("CPMP") on behalf of the EMEA. Both the FDA and EMEA
acknowledged that the Company's studies met the diagnostic endpoint of the Phase
III clinical study which was to provide incremental information to the surgeon
regarding the location of hidden tumor. However, both agencies wanted to know
how the finding of additional tumor provided clinical benefit that altered
patient management or outcome. The Company developed a clinical response plan
for both agencies during the first half of 1998. However, the formalized process
in Europe required Neoprobe, in November 1997, to withdraw its European
application from the EMEA.


During 1998, the Company discussed the FDA's request for additional information
with the FDA and with expert clinical and regulatory advisors. Based on these
discussions, the Company determined that the best plan for obtaining regulatory
approval of its RIGS technology would be to re-apply after conducting clinical
trials of a second-generation antibody. Because of the cost and risk of clinical
trials, the Company determined that it would not conduct clinical trials of
RIGScan CR49 or a second generation antibody unless it is able to find a partner
who would assume the regulatory and financial activities associated with
clinical trials, manufacturing validation and product commercialization. The
Company does not intend to fund any further RIGS-related research and
development by itself. The Company is involved in preliminary negotiations with
a party interested in commercializing a second-generation antibody for use in
colorectal cancer surgery. At this time, the Company has not reached definitive
agreement with any party that would ensure the continued development of the RIGS
process. In addition, should a party ultimately decide to move forward with
development of a RIGS product and be able to reach an agreement satisfactory to
the Company, the Company believes that the likely timeframe required for
continued development, regulatory and commercialization of a RIGS product would
likely take a minimum of four to five years before the Company received any
significant product-related royalties. However, there can be no assurance that
the Company will be able to complete definitive license agreements with a
development partner for

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the RIGS technology and does not know if a partner will be obtained on a timely
basis, on terms acceptable to the Company, or at all. There can be no assurance
that the FDA or the EMEA will approve the Company's RIGS products for marketing,
or that any such products will be successfully introduced or achieve market
acceptance. See "Risk Factors -- Government Regulation."


Activated Cellular Therapy for Cancer and Viral Disease


As a result of its RIGScan CR49 research, Neoprobe developed a RIGS based
Activated Cellular Therapy ("ACT") for cancer, which boosts the patient's own
immune system by removing lymph nodes identified using the RIGS process during
surgery and then, in a cell processing facility, activating and expanding
"helper" T-cells found in the nodes. Within 10 to 14 days, the patient's own
immune cells, now activated and numbering more than 20 billion, are infused into
the patient in an attempt to trigger an effective immune response to the cancer.
An in-vitro research program has shown that soluble factors secreted by the
activated cells produce significant chemo-enhancement in a number of tumor cell
lines for a variety of chemotherapeutic agents. The in-vitro assessment
correlates with an observation of potential chemo-enhancement in an earlier
Phase I clinical study of unresectable colorectal patients performed at The Ohio
State University.


In addition, Neoprobe has preliminarily evaluated the application of a non-RIGS
based ACT therapy for the treatment of chronic viral diseases. ACT for viral
diseases uses peripheral lymph nodes, which are obtained in an out-patient
setting, as the initial starting culture material. After using Neoprobe's
activation and expansion procedures, the cells are infused in 10 to 14 days. A
Phase I study has been completed with HIV/AIDS patients at The Ohio State
University with encouraging results. During 1998, the Company completed a Phase
I trial in additional viral diseases, extending the use of activated cellular
therapy to patients co-infected with HIV/AIDS and chronic active hepatitis B or
C at the Miami VA Medical Center in Florida. Because of the cost and risk of
clinical trials, the Company determined that it will not conduct clinical trials
of ACT unless it finds a partner who will assume the financial burden of the
trials and manufacturing validation. The Company does not intend to fund any
further ACT-related research and development by itself. The Company has not
entered into any agreements with a development partner for the ACT technology
and does not know if a partner will be identified on a timely basis, on terms
acceptable to the Company, or at all. There can be no assurance that any ACT
products will be successfully developed, tested or licensed, or that any such
products will gain market acceptance. See "Risk Factors - Government
Regulation."


CANCER MARKET OVERVIEW


Cancer is the second leading cause of death in the U.S. and Western Europe and
is responsible for over half a million deaths annually in the U.S. alone. The
National Institutes of Health ("NIH") estimate the overall annual costs for
cancer, the primary focus of the Company's products, at $107 billion: $37
billion for direct medical costs, $11 billion for morbidity, and $59 billion for
mortality. NIH estimated that breast cancer will annually affect approximately
500,000 women in North America, Western Europe, and other major economic
markets. Approximately 80% of the patients diagnosed with breast cancer undergo
a lymph node dissection to determine if the disease has spread. While many
breast cancer patients are treated in large cancer centers or university
hospitals, regional and/or community hospitals treat the majority of breast
cancer patients. Over 10,000 hospitals are located in the markets targeted for
Neoprobe's breast cancer ILM products. Melanoma is the fastest increasing form
of cancer in the United States and Europe. The medical importance of ILM staging
has been accepted for melanoma. However, more melanoma patients are typically
treated at large cancer centers or university hospitals focusing the market
opportunity for Neoprobe's melanoma ILM products. An aging population, coupled
with longer survival rates, should increase the size of the overall oncology
market significantly in the coming years.


MARKETING AND DISTRIBUTION


The Company began development of its first portable gamma radiation detection
device, the Neoprobe 1000, in 1987. In 1996, Neoprobe began marketing its
devices into the emerging ILM field as a pre-marketing strategy for the
anticipated commercial launch of a RIGS product.




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<PAGE>   6
In October 1997, the Company launched an improved version of its gamma radiation
detection device, the Neoprobe 1500, in response to the expanding adoption of
the ILM technique in melanoma, breast and other cancers. In October 1998,
Neoprobe introduced a feature-enhanced component, the neo2000 control unit. The
neo2000 control unit is a software-upgradable product that permits the addition
of product enhancements without costly remanufacturing. In April 1998, the
Company launched a new 14mm reusable probe that has been optimized for breast
cancer procedures. During the first quarter of 1999, Neoprobe introduced a new
line of reusable, sterilizable BlueTip(TM) probes and accompanying disposable
handles.


The Company intends to continue developing additional ILM-related probes and
instrument products in connection with EES to continue its leadership position
in the ILM field. The Company intends to also preliminarily investigate and
perform early stage research on other ILM-procedural products during 2000 that
could expand the Company beyond a single product line. The Company does not
believe the expenditures, if any, for procedural product extensions will be
material to the results of operations for 2000. However, there can be no
assurance that any such products will achieve regulatory approval (See "Risk
Factors -- Government Regulation") or if approved that such products will
achieve market acceptance (See "Risk Factors -- Dependence on Principal Product
Line").


Physician training is critical to the use and adoption of ILM products by
surgeons and other medical professionals. Neoprobe and EES have established
relationships with the leaders in the ILM surgeon community and has established
and supported training courses internationally for lymphatic mapping. The
Company intends to continue to work with EES to expand the number of training
courses available for surgeons to be trained in the ILM technique.


Since the Company began actively marketing its products into the ILM arena in
1996, it has marketed its products through a number of different internal and/or
external marketing arrangements. In September 1996, the Company executed a
License and Distributorship Agreement with United States Surgical Corporation
("USSC") under which USSC was paid commissions based on sales of the Company's
products. The Company agreed to terminate the agreement at USSC's request
effective October 1997. The parties also agreed to discharge and release each
other from all remaining claims and financial obligations relating to the
agreement, including license fees.


In April 1998, the Company executed a non-exclusive Sales and Marketing
Agreement with EES to market and promote certain of the Company's line of
hand-held gamma detection instruments. Under the terms of the agreement, the
Company paid EES a commission based on unit sales. On January 29, 1999, the
Company provided EES with notice of the Company's intent to terminate the
agreement effective March 1, 1999 due to differences in market focus and EES
intent at that time to develop a proprietary product line that would compete
directly with the Company's products.

Effective February 1, 1999, the Company executed an exclusive Sales and
Marketing Agreement with KOL BioMedical Instruments, Inc. ("KOL") to market the
Company's gamma guided surgery products in the U.S. The Company terminated the
agreement with KOL effective October 31, 1999 due to the Company's opportunity
to enter a new worldwide distribution arrangement with EES that offered the
Company broader opportunities to penetrate growing global markets in addition to
the U.S. market. In connection with the termination, the Company agreed to pay
KOL any outstanding commission amounts due as well as a $700,000 fee to
terminate the agreement. The Company repurchased approximately $850,000 in
demonstration equipment from KOL that EES has purchased or agreed to purchase.

The Company entered into a Distribution Agreement (the "Agreement") with EES
effective October 1, 1999 for an initial five-year term with options to extend
for two successive two-year terms. Under the Agreement, the Company will
manufacture and sell its ILM products exclusively to EES, who will distribute
the products globally. EES agreed to purchase minimum quantities of the
Company's products over the first three years of the term of the Agreement and
to reimburse the Company for certain research and development costs and a
portion of the Company's warranty costs. EES also agreed to purchase the
demonstration units returned from KOL at cost. The Company is obligated to
continue certain product maintenance activities and to provide ongoing
regulatory support for the products.



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EES may terminate the Agreement if the Company fails to supply products for
specified periods, commits a material breach of the Agreement, suffers a change
of control of the Company, or becomes insolvent. If termination is due to
failure to supply or a material breach by the Company, EES would have the right
to use the Company's intellectual property and regulatory information to
manufacture and sell the products exclusively on a global basis for the
remaining term of the Agreement with no additional financial obligation to the
Company. If termination is due to insolvency or a change of control that does
not affect supply of the products, EES has the right to continue to sell the
products on an exclusive global basis for a period of six months or require the
Company to repurchase any unsold products in its inventory.

Under the Agreement, EES received a non-exclusive, worldwide paid-up license
(the "License") to the Company's ILM intellectual property to make and sell
other products that may be developed using the Company's ILM intellectual
property. The term of the License is the same as that of the Agreement. EES paid
the Company a non-refundable license fee of $4 million. The Company intends to
recognize the license fee as revenue over the five-year initial term of the
Agreement. If the Agreement is terminated by the Company as a result of a
material breach by EES, EES would be required to pay the Company a royalty on
all products developed and sold by EES using the Company's ILM intellectual
property. In addition, the Company is entitled to a royalty on any ILM product
commercialized by EES that does not infringe any of the Company's existing
intellectual property. See "Risk Factors -- Limited Marketing Experience."

MANUFACTURING

Neoprobe Instruments. The Company relies on independent contract manufacturers,
some of which are single source suppliers, for the manufacture of the principal
components of its current line of gamma guided surgery products, see "Risk
Factors--Limited Manufacturing Capacity and Experience". The Company's model
1000 and 1500 control unit and the 19mm probe were originally manufactured under
a 1996 Manufacturing and Supply Agreement with RELA, Inc. of Boulder Colorado
("RELA"), a developer and manufacturer of medical devices. The Company intends
to officially discontinue the Neoprobe 1000 control unit during fiscal year
2000; however, the model 1500 and 19mm probe continue to be available for
distribution through EES.

During 1998, the Company began manufacturing the 14mm probe and the neo2000
control unit. The neo2000 control unit and the 14mm probe involve the
manufacture of components by a variety of subcontractors, including but not
limited to Plexus Corporation ("Plexus"); and eV Products, a division of II-VI
Corporation ("eV"). eV produces the crystal used in the detector probes, and
Plexus performs assembly of the neo2000 control unit and final assembly of the
14mm probe. Currently, the Company has a Manufacturing and Supply Agreement with
eV for the production of crystals; however, work has been performed by Plexus
under terms of a letter of intent, pending completion of the final manufacturing
and supply agreement. During March 2000, the Company and Plexus executed a
supply and manufacturing agreement. During the first quarter of 1999, the
Company began manufacturing the BlueTip probes. The BlueTip probes also use
crystal assemblies produced by eV, but final assembly of the BlueTip probes is
done under a supply agreement by The MedTech Group, Inc. ("MedTech"). There can
be no assurance that the Company will be able to complete or maintain agreements
with its subcontractors on a timely basis, on terms acceptable to the Company,
or at all. Any significant supply interruption or yield problems experienced by
the Company would have a material adverse effect on the Company's ability to
manufacture its products and, therefore, a material adverse effect on its
business, financial condition, and results of operations until a new source of
supply is qualified. See "Risk Factors -- Limited Manufacturing Capacity and
Experience."

In December 1997, the Company entered into a supply agreement with eV for the
supply of certain crystals and associated electronics to be used in the
manufacture of the Company's proprietary line of hand-held gamma detection
probes. The original term of the agreement expires on December 31, 2002 but may
be automatically extended for an additional three years. The agreement calls for
the Company to purchase minimum quantities of crystals and associated
electronics based on annually forecasted production needs. eV supplies 100% of
the crystals used by the Company. While eV is not the only potential supplier of
such crystals, any prolonged interruption from this source could restrict the
availability of the Company's probe products, which would affect operating
results adversely.


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In May 1999, the Company entered into a supply agreement with MedTech for the
supply of BlueTip probes and related accessories. The original term of the
agreement expires on December 31, 2003 but may be automatically extended for an
additional three years. The agreement calls for the Company to deliver annual
product forecasts to MedTech and for the Company to purchase at least 75% of
forecasted product demand on a quarterly basis. The agreement may be terminated
by the Company upon twelve months notice or in the event of failure to supply or
by either party due to material breach or insolvency.

In March 2000, the Company entered into a manufacturing and supply agreement
with Plexus for the exclusive manufacture of the Company's 14mm probe and
neo2000 control unit. The original term of the agreement expires on December 31,
2003 but may be extended for an additional year given six months notice prior to
December 31, 2003. The Company has the right to terminate the agreement upon six
months written notice. The agreement may be terminated by either party in the
event of material breach, insolvency or by the Company in the event of failure
to supply. The Company may also have the covered product manufactured by other
suppliers in the event of failure to supply or if the Company is able to secure
another source of supply significantly more favorable pricing terms than those
offered by Plexus. The agreement calls for the Company to deliver rolling
12-month product forecasts to Plexus and to place purchase orders 60 days prior
to requested delivery in accordance with the forecast. In the event the
agreement is terminated by Neoprobe or if Plexus ceases to be the exclusive
supplier of the covered products, the Company is required to purchase all
finished components on hand at Plexus plus raw materials not able to be
restocked with suppliers.

PATENTS AND PROPRIETARY RIGHTS

The Company regards the establishment of a strong intellectual property position
in its technology as an integral part of the development process. Each of the
Company's technologies is protected by patents and intellectual property
positions, in the United States as well as foreign countries. Specifically,
Neoprobe's ILM technology is protected by twelve (12) instrument patents that
have been issued in the United States as well as major foreign markets. In
addition to the issued patents, twenty (20) patent applications have been filed
in the United States and certain major foreign markets. The patent applications
cover the Company's newly introduced neo2000 systems, probes, and products that
the Company plans to introduce in the coming months and years.


The Company continues to attempt to maintain proprietary protection for the
products related to RIGS and ACT, which although not currently integral to the
Company's business plans, may be important to a potential development partner.
Certain aspects of Neoprobe's RIGS technology are claimed in the United States
in U.S. Patent No. 4,782,840, which expires in 2005, unless extended. The
Company believes that some of its RIGS technology will not be patentable in
certain foreign countries.


The patent position of biotechnology and medical device firms, including the
Company, generally is highly uncertain and may involve complex legal and factual
questions. Potential competitors may have filed applications for, or may have
been issued patents, or may obtain additional patents and proprietary rights
relating to products or processes in the same area of technology as that used by
the Company. The scope and validity of these patents and applications, the
extent to which Neoprobe may be required to obtain licenses thereunder or under
other proprietary rights, and the cost and availability of licenses are
uncertain. There can be no assurance that the Company's patent applications will
result in additional patents being issued or that any of the Company's patents
will afford protection against competitors with similar technology; nor can
there be any assurance that any of the Company's patents will not be designed
around by others or that others will not obtain patents that Neoprobe would need
to license or design around. See "Risk Factors -- Patents, Proprietary
Technology and Trade Secrets."


The Company also relies upon unpatented trade secrets. No assurance can be given
that others will not independently develop substantially equivalent proprietary
information and techniques, or otherwise gain access to the Company's trade
secrets, or disclose such technology, or that the Company can meaningfully
protect its rights to its unpatented trade secrets. The Company requires its
employees, consultants, and advisers to execute a confidentiality agreement upon
the commencement of an employment or consulting relationship with Neoprobe. The
agreement provides that all confidential information developed or made known to
the individual during the course of the relationship will be kept confidential
and not disclosed to third parties except in specified



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circumstances. In the case of employees, the agreements provide that all
inventions conceived by the individual will be the exclusive property of
Neoprobe. There can be no assurance, however, that these agreements will provide
meaningful protection for Neoprobe's trade secrets in the event of an
unauthorized use or disclosure of such information.


GOVERNMENT REGULATION


The production and marketing of Neoprobe's products and its research and
development activities are subject to detailed and substantive regulation by
governmental authorities in the United States and other countries. In the United
States, drugs, biologic products, and medical devices are regulated by the FDA.
Federal and state statutes and regulations, govern, among other things, clinical
testing, manufacture, labeling, packaging, marketing, distribution, and record
keeping in order to ensure that the Company's products are safe and effective
for their intended use. Noncompliance with applicable requirements can result
in, among other things fines, injunctions, suspensions or loss of regulatory
approvals, recall or seizure of the Company's products, and criminal
prosecution. The FDA has the authority to revoke previously granted licenses.
See "Risk Factors -- Government Regulation."


Instrument Products. The FDA classifies medical devices into one of three
classes -- class I, II, or III. Class I devices are subject to general controls,
such as labeling, premarket notification (the "510(k)" process), and adherence
to FDA-mandated quality system regulations ("QSR"). Class II devices are subject
to general and special controls, such as performance standards, postmarket
surveillance, patient registries, and FDA guidelines. Class III devices are
generally life-sustaining, life-supporting, or implantable devices and must
receive pre-market approval by the FDA.


A premarket approval application ("PMA") must be filed if a proposed device is
not substantially equivalent to a legally marketed reserved Class I or Class II
device, or if it is a Class III device for which the FDA has called for PMAs.
The PMA process is much more expensive, uncertain and lengthy than the 510(k)
process. A PMA application must be supported by valid scientific evidence, which
typically includes extensive testing and manufacturing information, including
preclinical and clinical trial data to demonstrate the safety and effectiveness
of the device. The PMA process is not anticipated for the Company's instrument
products.


If a seller of medical devices can establish that a new device is "substantially
equivalent" to a legally marketed Class I or Class II medical device or to a
Class III device for which the FDA has not required pre-market approval, the
seller may market the device without further approvals being granted by the FDA.
The FDA may, however, determine that the new device is not substantially
equivalent and require the seller to submit further information, such as
additional clinical test data, before it is able to make a determination
regarding substantial equivalence, which can substantially delay the market
introduction of the product. For a device that is cleared through the 510(k)
process, modifications or enhancements that could significantly affect the
safety or effectiveness of the device, or that constitute a major change to the
intended use of the device, will require a new 510(k) submission.


The Neoprobe 1000 instrument received 510(k) clearance in December 1986, and
modified versions received 510(k) clearance in June 1992 and February 1995. The
Neoprobe 1500 system received 510(k) clearance in June 1997. In February 1998,
the FDA reclassified "nuclear uptake detectors" as being exempt from the 510(k)
(premarket notification) process. The Company must continue to manufacture the
devices under QSR and maintain appropriate technical files and quality records.
The Company believes the neo2000 device is exempt from the 510(k) process
because it is substantially equivalent to the Neoprobe 1500 system.


The FDA ensures QSR compliance through periodic facility inspections.
Accordingly, manufacturers must commit ongoing substantial resources to
maintaining a high level of compliance with QSR. In addition, Neoprobe's
promotional and educational activities regarding its diagnostic instrument
products must comply with FDA policies and regulations regarding acceptable
device product promotion practices.


The Company's products are regulated in Europe according to the Medical Device
Directive (93/42/EEC). Under this regulation, the Company must obtain CE Mark
status for all products exported to Europe. The Company must continue to
manufacture the devices under a quality system compliant to the requirements of
ISO 9001 and maintain



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<PAGE>   10

appropriate technical files. The Company has obtained a license to import
devices into Canada. The Company has to continue to manufacture the devices
under a quality system compliant to the requirements of ISO 134888.


RIGS and ACT products. The Company's biologic products, if developed, would
require a regulatory license to market by the FDA and by comparable agencies in
foreign countries. The process of obtaining regulatory licenses and approvals is
costly and time consuming, and the Company has encountered significant
impediments and delays related to its previous proposed biologic products. See
"Risk Factors -- Government Regulation."


The steps required before a biologic agent may be marketed in the United States
include (i) preclinical laboratory and animal testing; (ii) submission to the
FDA of an Investigational New Drug ("IND") application, which must become
effective before human clinical trials may commence; (iii) adequate and well
controlled human clinical trials to establish the safety and efficacy of the
biologic for its intended use; (iv) submission of a Biologic License Application
("BLA") to the FDA; and (v) FDA approval of these applications.


In addition to reviewing information submitted in the BLA, each manufacturing
facility must undergo a pre-approval inspection by the FDA to assess its
suitability and compliance with GMP and periodic inspections thereafter. Once
approved, any significant changes in the manufacturing process, equipment,
facilities, or product specifications must be pre-approved by the FDA and may
require additional clinical data to validate the changes prior to allowing their
implementation.


The FDA may deny a BLA if applicable regulatory criteria are not satisfied,
require additional testing or information, or require postmarket testing and
surveillance to monitor the safety or efficacy of the Company's products.
Notwithstanding the submission of such data, the FDA may ultimately decide that
the application does not satisfy its regulatory criteria for approval. Finally,
product approvals may be withdrawn if compliance with regulatory standards is
not maintained, or if a problem occurs following initial marketing.


The process of completing clinical testing usually takes a number of years and
requires the expenditure of substantial resources, and there can be no assurance
that any approval will be granted on a timely basis, if at all. Additionally,
the length of time it takes for the FDA to evaluate an application for marketing
approval varies considerably, as does the amount of preclinical and clinical
data required to demonstrate the safety and efficacy of a specific product. The
FDA may require additional clinical studies which may take several years to
perform. The length of the review period may vary widely depending upon the
nature and indications of the proposed product and whether the FDA has any
further questions or requests any additional data. Also, the FDA will require
postmarketing reporting and surveillance programs to monitor the side effects of
the products. There can be no assurance that any of the Company's potential
products will be approved by the FDA or approved on a timely or accelerated
basis, or that any approvals received will not subsequently be revoked or
modified.


The Company submitted a dossier to the European regulatory agencies in May 1996,
and a BLA to the FDA in December 1996, for its RIGScan CR49 product for the
detection of metastatic colorectal cancer. In November 1997, the Company
voluntarily withdrew its European Marketing Authorization Application after a
decision by the Committee for Proprietary Medicinal Products (CPMP) determined
that there was insufficient data to support the clinical utility of the product;
additional information has been requested. In December 1997, the FDA issued an
action letter to the Company stating that the BLA is "not approvable at this
time" and requested a formal response to the deficiencies listed in the letter.
This additional information must be submitted in the form of a BLA Amendment.
During 1998, the Company discussed the FDA's request for additional information
with the FDA and with expert clinical and regulatory advisers. Based on these
discussions, the Company determined that the best plan for obtaining regulatory
approval of its RIGS technology would be to re-apply after conducting clinical
trials of a second-generation antibody. Because of the cost and risk of clinical
trials, the Company has determined that it will not conduct clinical trials of
RIGScan CR49 or a second-generation antibody unless it finds a partner who will
assume the financial burden of the trials and manufacturing validation. The
Company does not intend to fund any further RIGS-related research and
development by itself. The Company is involved in preliminary due diligence with
parties interested in commercializing a second-generation antibody for use in
colorectal cancer surgery. At this time, the Company has not reached definitive
agreement with any party that would ensure the continued development of the RIGS
process. In addition, should a party ultimately decide to move forward with
development


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<PAGE>   11

of a RIGS product and be able to reach an agreement satisfactory to
the Company, the Company believes that the likely timeframe required for
continued development, regulatory clearance and commercialization
of a RIGS product would likely take a minimum of four to five years before the
Company received any significant product-related royalties. However, there can
be no assurance that the Company will be able to complete definitive license
agreements with a development partner for the RIGS technology and does not know
if a partner will be obtained on a timely basis, on terms acceptable to the
Company, or at all. There can be no assurance that the Company's RIGS products
will be approved for marketing by the FDA or the EMEA, or that any such products
will be successfully introduced or achieve market acceptance. See "Risk Factors
- -- Government Regulation."


Before marketing its products in Western Europe, the Company will be required to
receive the approval of the European Council or European Commission and the
appropriate governmental agencies in each of the respective countries. For
marketing outside the United States, the Company is also subject to foreign
regulatory requirements governing human clinical trials, pharmaceutical sales,
and marketing approval of its products. Whether or not FDA approval has been
obtained, approval of a product by comparable regulatory authorities of foreign
countries must be obtained prior to commencement of manufacturing or marketing
of the product in those countries. The requirements governing the conduct of
clinical trials, product licensing, pricing, and reimbursement vary widely from
country to country; however, foreign procedures are similar to those required by
the FDA. The Company intends, to the extent possible, to rely on foreign
distributors of its products to manage and obtain regulatory approval for those
products.


In addition to regulations enforced by the FDA, the manufacture, distribution,
and use of radioactive targeting agents, if developed, are also subject to
regulation by the Nuclear Regulatory Commission, the Department of
Transportation and other federal, state, and local government authorities.
Neoprobe or its manufacturer of the radiolabeled antibodies must obtain a
specific license from the Nuclear Regulatory Commission to manufacture and
distribute radiolabeled antibodies, as well as comply with all applicable
regulations. Neoprobe must also comply with Department of Transportation
regulations on the labeling and packaging requirements for shipment of
radiolabeled antibodies to licensed clinics, and must comply with federal,
state, and local governmental laws regarding the disposal of radioactive waste.
There can be no assurance that the Company will be able to obtain all necessary
licenses and permits and be able to comply with all applicable laws. The failure
to obtain such licenses and permits or to comply with applicable laws would have
a materially adverse effect on the Company's business, financial condition, and
results of operations.


COMPETITION


Neoprobe faces competition from medical device companies, as well as from
universities and other non-profit research organizations in the field of cancer
diagnostics and treatment. Many emerging medical device companies have corporate
partnership arrangements with large, established companies to support the
research, development, and commercialization of products that may be competitive
with those of the Company. In addition, a number of large established companies
are developing proprietary technologies or have enhanced their capabilities by
entering into arrangements with or acquiring companies with proprietary antibody
technology, or other technologies applicable to the detection or treatment of
cancer. Many of the Company's existing or potential competitors have
substantially greater financial, research and development, regulatory,
marketing, and production resources than those of the Company. Other companies
may develop and introduce products and processes competitive with or superior to
those of the Company. Further, the development by others of new cancer
diagnostic, or treatment methods or the development of a cure or vaccine for
cancer could render the Company's technology and products under development
noncompetitive or obsolete. See "Risk Factors -- Competition" and "-- Risk of
Technological Obsolescence."


For the Company's products, an important factor in competition may be the timing
of market introduction of its products or those of its competitors' products.
Accordingly, the relative speed with which Neoprobe can develop products,
complete the approval processes and supply commercial quantities of the products
to the market will be an important competitive factor. Neoprobe expects that
competition, among products approved for sale, will be based, among other
things, on product efficacy, safety, reliability, availability, price, and
patent position.




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<PAGE>   12

With the emergence of ILM, a number of companies have begun to market gamma
radiation detection instruments. Most of the competitive products have been
designed from a nuclear medicine perspective rather than developing products for
the surgeon. The principal competitive product in both the United States and
Europe has been the Navigator system which is marketed by US Surgical
Corporation, and a device manufactured and sold by Carewise Medical Products.
Also, although the Company is not aware of any specific plans to do so, EES
currently retains the right to develop its own proprietary line of hand-held
gamma detection equipment that could compete directly with the Company's
product. The Company believes its intellectual property portfolio will be a
barrier to competitive products; however, there can be no assurance that
competitive products will not be developed and be successful in eroding the
Company's market share for gamma guided surgery products. See -- "Risk Factors
Competition."


EMPLOYEES


As of February 29, 2000, Neoprobe had twenty full-time employees. Neoprobe
considers its relations with its employees to be satisfactory.


RISK FACTORS


The discussion in this Report contains forward-looking statements that involve
risks and uncertainties. The Company's actual results may differ significantly
from the prospects discussed in the forward-looking statements. Factors that
could cause or contribute to such differences include, but are not limited to,
those listed below.


Limited Revenues; Continuing Net Losses; Accumulated Deficit


The Company's limited history of operations, the nature of its business, and its
limited marketing and manufacturing experience make the prediction of future
operating results difficult and highly unreliable. The Company's future
prospects, therefore, must be evaluated in light of the substantial risks,
expenses, delays and difficulties normally encountered by companies in the
medical device industry, which is characterized by an increasing number of
participants, intense competition and a high rate of failure. The Company began
active marketing of its ILM products in 1997 and has limited experience in
manufacturing, marketing and selling its ILM products. Since its inception in
1983, the Company expended the majority of its efforts and resources in the
research and development of its RIGS technology. During 1998, based on
disappointing regulatory feedback from the FDA and European regulatory
authorities, the Company revised its business plan to severely curtail research
and development of the RIGS technology and to focus on gamma guided surgery
products such as those used in ILM. The Company has experienced significant
operating losses in each year since inception, and had an accumulated deficit of
approximately $120 million as of December 31, 1999. For the years ended December
31, 1999, 1998 and 1997, the Company's net losses were $4.2 million, $28.0
million and $23.2 million, respectively. The Company expects to generate
operating profitability in fiscal 2000 as a result of sales of its products to
EES. However, there can be no assurance that the Company will achieve a
profitable level of operations in 2000, or that if achieved, that such
profitability can be sustained in future years. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations."


Future Capital Needs; Uncertainty of Capital Funding


To date, the Company's capital requirements have been significant. The Company
has depended on the proceeds of sales of its securities and other financing
vehicles to continue research and development and to fund its working capital
requirements. The Company's future capital requirements depend on numerous
factors, including the extent to which the Company's products achieve market
acceptance and generate revenue, the resources the Company devotes to
developing, manufacturing and marketing its products, the progress of future
development programs, and the time required to obtain additional regulatory
clearances or approvals. The Company expects to continue to devote capital
resources to fund research and development of additional gamma guided surgery
products, and to secure manufacturing capacity. The timing and amount of such
capital requirements cannot be accurately predicted. Consequently, the Company
may be required to raise additional funds through public or private financing,
collaborative relationships, or other arrangements. However, no assurance can be
given that the necessary


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<PAGE>   13
additional financing will be available to the Company on acceptable terms, if at
all, or that would not result in further dilution to the holders of the
Company's equity securities. The Company's ability to raise additional financing
may be dependent on many factors beyond the Company's control, including the
state of capital markets and the development or prospects for development of
competitive technology by others. See "Item 6. Management's Discussion and
Analysis of Financial Condition and Results of Operations -- Liquidity and
Capital Resources."


Dependence on exclusive distributor

The Company currently markets only a single line of medical instruments targeted
at the ILM market. These ILM instruments are marketed through a Distribution
Agreement with EES that began on October 1, 1999. Under the Agreement, the
Company will manufacture and sell its ILM products exclusively to EES, who will
distribute the products globally. EES agreed to purchase minimum quantities of
the Company's products over the first three years of the initial five-year term
of the Agreement. EES may terminate the Agreement if the Company fails to supply
products for specified periods, commits a material breach of the Agreement,
suffers a change of control of the Company, or becomes insolvent. While the
Company believes that EES intends to aggressively market the Company's products,
there can be no assurance that EES will purchase product from the Company in
excess of its minimum annual purchase requirements or that such purchases will
generate profitability or adequate cash flow to finance the Company's operations
in the long-term.

Dependence upon Gamma Guided Surgery Product Line; Uncertainty of Market
Acceptance


The Company's products, although being investigated for potential use in a
number of areas, are currently only widely used in the treatment and diagnosis
of two primary types of cancer: melanoma and breast cancer. The Company's
success is dependent on acceptance of ILM, and of its devices for use in ILM, by
the medical community as a reliable, safe and cost effective alternative to
current treatments and procedures. Although the Company believes that ILM has
significant advantages over other currently competing procedures, broad-based
clinical adoption of ILM will not occur until physicians outside the major
cancer centers and teaching hospitals determine that the ILM approach is an
attractive alternative to current treatments for use in melanoma and breast
cancer and expand its use to other types of cancer. There can be no assurance
that ILM will achieve significant market acceptance. There can be no assurance
that the Company's marketing efforts will result in significant demand for its
products, or that the current demand for the Company's products will be
maintained or continue to grow.


Competition


The medical device industry is intensely competitive. The Company's competitors
have significantly greater financial, technical, and manufacturing resources as
well as greater experience in the medical device industry than the Company. The
particular medical conditions that can be treated using the Company's ILM
products can also be treated and diagnosed by other medical devices, procedures,
or pharmaceuticals. Many of these alternatives are widely accepted in the
medical community and have a long history of use. The Company also believes that
its relationships with physicians and customer support are important competitive
factors. There can be no assurance that physicians will use the Company's
products or replace or supplement established treatments with the Company's
products, or that the Company's products will be competitive with other
technologies. There can be no assurance that the Company can achieve or maintain
a competitive position. In such event, the Company's business, operating
results, and financial condition could be materially adversely affected.


Limited Marketing Experience


The Company has limited experience in sales, marketing, or distribution of any
of its products. The Company currently markets its products through an exclusive
worldwide distribution arrangement with EES that began on October 1, 1999.
However, prior to this distribution arrangement, the Company marketed its
products through a number of different internal and/or external marketing
staffing arrangements with varying degrees of success. There can be no assurance
that the Company will be able to maintain its current distribution arrangement
with EES, or that EES will devote adequate resources to selling the Company's
products. Failure to maintain an effective



                                       13
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distribution relationship with EES could have a material adverse effect on the
Company's business, financial condition, and results of operations. There can be
no assurance that the Company will be able to, or its distribution partner will
be able to, market the Company's products successfully in the future. In such
event, the Company's business, operating results, and financial condition could
be materially adversely affected.


Risks of International Operations


EES markets the Company's products internationally. Changes in overseas economic
conditions, currency exchange rates, foreign tax laws or tariffs or their trade
regulations could have a material adverse effect on the Company's business,
financial condition and results of operations. The international nature of the
Company's business is also expected to subject it and its distributors to laws
and regulations of the foreign jurisdictions in which they operate or the
Company's products are sold. The regulation of medical devices in a number of
such jurisdictions, particularly in the European Union, continues to develop and
there can be no assurance that new laws or regulations will not have an adverse
effect on the Company's business, financial condition and results of operations.


Limited Manufacturing Capacity and Experience


The Company relies on independent contract manufacturers, some of which are
single source suppliers, for the manufacture of the principal components of its
current line of gamma guided surgery products. Shortages of raw materials,
production capacity constraints or delays on the part of the Company's contract
manufacturers could negatively affect the Company's ability to ship products and
obtain revenue. The Company uses or relies on certain components and services
used in its devices that are provided by sole source suppliers. Although the
Company has identified primary and alternative vendors, the qualification of
additional or replacement vendors for certain components or services is a
lengthy process. Any significant supply interruption or yield problems
experienced by the Company would have a material adverse effect on the Company's
ability to manufacture its products and, therefore, a material adverse effect on
its business, financial condition, and results of operations until a new source
of supply is qualified. Some of the components of the Company's products are
molded parts that require custom tooling that is manufactured and maintained by
third party vendors. Should such custom tooling be damaged, it could result in a
supply interruption that could have a material adverse effect on the Company's
ability to manufacture its products until a new tool is manufactured. Also, the
Company's new product development efforts and the timeliness of new product
launches can be significantly impacted by the tooling vendor's ability to meet
completion and quality commitments on the manufacture of custom tooling.
Companies often encounter difficulties in scaling up production, including
problems involving production yield, quality control and assurance, and
shortages of qualified personnel. As the Company increases production, it may,
from time to time, experience lower than anticipated yields or production
constraints, resulting in delayed product shipments which could have a material
adverse effect on the Company's business, financial condition, and results of
operations.


The Company expects to manufacture its products based on forecasted product
orders. Lead times for materials and components ordered by the Company vary
significantly, and depend on factors such as the business practices of the
specific supplier, contract terms, and general demand for a component at a given
time. Certain components used in the Company's products have long lead times. As
a result, there is a risk of excess or inadequate inventory if orders do not
match forecasts.


In addition, medical device manufacturing facilities are subject to GMP
regulations, international quality standards, and other regulatory requirements.
The failure of the Company's contractors to implement and maintain their
facilities in accordance with GMP regulations, international quality standards,
or other regulatory requirements could entail a delay or termination of
production, which could have a material adverse effect on the Company's
business, financial condition and results of operations.


Patents, Proprietary Technology and Trade Secrets


The Company's success depends, in part, on its ability to secure and maintain
patent protection, to preserve its trade secrets, and on its ability to operate
without infringing on the patents of third parties. The Company seeks to protect


                                       14
<PAGE>   15

its proprietary positions by filing United States and foreign patent
applications related to its technology, inventions and improvements that are
important to the development of its business. There can be no assurance,
however, that the patents for which the Company has applied will be issued to
the Company. There can be no assurance that any of the Company's patents or
patent applications will not be challenged, invalidated, or circumvented in the
future. In addition, there can be no assurance that competitors, many of which
have substantially more resources than the Company and have made substantial
investments in competing technologies, will not seek to apply for and obtain
patents that will prevent, limit, or interfere with the Company's ability to
make, use, or sell its products either in the United States or internationally.


Patent applications in the United States are maintained in secrecy until patents
issue, and patent applications in foreign countries are maintained in secrecy
for a period after filing. Publications of discoveries in the scientific or
patent literature tend to lag behind actual discoveries and the filing of
related patent applications. Patents issued and patent applications filed
relating to medical devices are numerous, and there can be no assurance that
current and potential competitors and other third parties have not filed or will
not file in the future applications for, or have not received or in the future
will not receive, patents or obtain additional proprietary rights relating to
products or processes used or proposed to be used by the Company. The Company
also relies upon trade secrets, technical know-how, and continuing technological
innovation to develop and maintain its competitive position.


The Company typically requires its employees, consultants, and advisors to
execute confidentiality and assignment of invention agreements in connection
with their employment, consulting, or advisory relationships with the Company.
There can be no assurance, however, that these agreements will not be breached
or that the Company will have adequate remedies for any breach. Further, there
also can be no assurance that others will not gain access to the Company's trade
secret information or independently develop or acquire the same or equivalent
trade secret information. Certain of the research activities relating to the
development of antibody technology that may be components of the Company's
proposed RIGS system technology products were conducted by agencies of the
United States government. When the United States government participates in
research activities, it retains certain rights that include the right to use the
technologies for governmental purposes under a royalty-free license, as well as
rights to use and disclose technical data and computer software that could
preclude the Company from asserting trade secret rights in that data and
software.


The Company has not been notified by any third party that the Company's products
and procedures infringe any valid, enforceable claim of any patent owned by
others. Any such claim, however, whether with or without merit, could be time
consuming and expensive to respond to and could divert the Company's technical
and management personnel. The Company may become involved in litigation to
defend against claims of infringement made by others, to enforce patents issued
to the Company, or to protect trade secrets of the Company. If any relevant
claims of third-party patents are upheld as valid and enforceable in any
litigation or administrative proceeding against the Company, it could be
prevented from practicing the subject matter claimed in such patents, or would
be required to obtain licenses from such patent owners, or to redesign its
products and processes to avoid infringement. There can be no assurance that the
Company will be able to obtain acceptable licenses or rights, if at all, to
other patents which the Company deems necessary for its operations. Accordingly,
an adverse determination in a judicial or administrative proceeding or failure
to obtain necessary licenses could prevent the Company from manufacturing and
selling its products, which would have a material adverse effect on the
Company's business, financial condition, and results of operations. The Company
intends to vigorously protect and defend its intellectual property. Costly and
time consuming litigation brought by the Company may be necessary to enforce
patents issued to the Company, to protect trade secrets or know-how owned by the
Company, or to determine the enforceability, scope, and validity of the
proprietary rights of others. See "Item 1.
Business-- Patents and Proprietary Rights" and "-- Competition."


Government Regulation


The Company's products in the United States are regulated as medical devices by
the FDA. The process of obtaining United States regulatory approvals and
clearances may be lengthy, expensive, and uncertain. Commercial distribution of
the company's products in foreign countries is also subject to varying
government regulations which may delay or restrict marketing of the Company's
products in those countries. In addition, such regulatory authorities may impose
limitations on the use of the Company's products. FDA enforcement policy
strictly



                                       15
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prohibits the marketing of FDA cleared or approved medical devices for
unapproved uses. Within the European Union, the Company's products are required
to display the CE mark in order to be sold. The Company has obtained
certification to display the CE mark on its currently available portable
radiation detection instruments. However, there can be no assurance that the
Company will be able to maintain certification for its current products or that
the Company will be able to obtain certification for any new products in a
timely manner, or at all.


The manufacturing operations of the Company's contract manufacturers are subject
to compliance with Good Manufacturing Practices ("GMP") regulations of the FDA
and similar regulations of the European Union. These regulations include
controls over design, testing, production, labeling, documentation, and storage
of devices. Enforcement of GMP regulations has increased significantly in the
last several years, and the FDA has publicly stated that compliance will be more
strictly scrutinized in the future. The Company's facilities and manufacturing
processes, as well as those of current and future third party suppliers, will be
subject to periodic inspection by the FDA, the Company's European Union notified
body, and other agencies. Failure to comply with these and other regulatory
requirements could result in, among other things, warning letters, fines,
injunctions, civil penalties, recall or seizure of products, total or partial
suspension of production, refusal of the government to grant premarket clearance
or premarket approval for devices, withdrawal of clearances or approvals, and
criminal prosecution, which could have an adverse effect on the Company and its
operations.


The Company does not currently market any RIGS products or radioactive targeting
agent to be used in ILM applications. However, if a partner is identified to
fund and assist in the development of RIGS products, or if the Company were to
undertake development of a radioactive targeting agent for use in ILM, these
products would also be subject to detailed and substantive regulation by the FDA
and by comparable agencies in foreign countries. Various federal, state, and
foreign statutes also govern or influence the manufacture, safety, labeling,
storage, record keeping, and marketing of such products. The process of
obtaining regulatory licenses and approvals is costly, time consuming, and prone
to unexpected delay. The Company has encountered and may continue to encounter
delays in the completion of testing or in the application process for RIGS and
ACT products. Future delays could result from, among other things, a longer than
expected regulatory review process, slower than expected patient enrollment
rates, difficulties in analyzing data from clinical trials or in validating
manufacturing processes and changes in regulatory requirements. Moreover,
foreign and domestic approvals, if granted, may include significant limitations
on uses of the products. Further, even if such regulatory approval is obtained,
use of the Company's products could reveal side effects that, if serious, could
result in suspension of existing licenses and delays in obtaining licenses in
other jurisdictions. A marketed product, manufacturer, and manufacturing
facilities are subject to continual review and periodic inspections, and later
discovery of previously unknown problems with a product, manufacturer, or
facility may result in restrictions on such product or manufacturer, including
withdrawal of the product from the market. Noncompliance with applicable
governmental requirements can result in import detentions, fines, civil
penalties, injunctions, suspensions or loss of regulatory approvals, recall or
seizure of the Company's products, operating restrictions, government refusal to
approve product export applications or to allow the Company to enter into supply
contracts, and criminal prosecution. Additional governmental regulation may be
established which could prevent or delay regulatory approval of the Company's
products. Any delays or failure to receive required approvals or limiting
conditions on approvals could materially adversely affect the Company's
business, operating results, and financial condition. See "-- Government
Regulation."


Risk of Technological Obsolescence


The medical device industry is characterized by rapid and significant
technological change. There can be no assurance that third parties will not
succeed in developing or marketing technologies and products that are more
effective than those developed or marketed by the Company, or that would render
the Company's technology and products obsolete or noncompetitive. Additionally,
new surgical procedures and medications could be developed that replace or
reduce the importance of current procedures that use the Company's products.
Accordingly, the Company's success will depend, in part, on its ability to
respond quickly to medical and technological changes through the development and
introduction of new products. There can be no assurance that the Company's
products will not become obsolete and that its efforts to develop will result in
any commercially successful products. In such event, the Company's business,
operating results, and financial condition could be materially adversely
affected. See "-- Competition."


                                       16
<PAGE>   17

Limited Third Party Reimbursement


Medical Devices. During the past several years, the major third-party payers of
hospital services in the United States (Medicare, Medicaid, private health care
insurance and managed care plans) have substantially revised their policies,
methodologies and formulae in an attempt to contain health care costs. The
introduction of various Medicare cost containment incentives, combined with
closer scrutiny of health care expenditures by both private health insurers and
employers, has resulted in increased contractual adjustments and discounts in
hospital charges for services performed and in the shifting of services from
inpatient to outpatients settings. If hospitals respond to such pressures by
substituting lower cost products or therapies for the Company's products, the
Company could be adversely affected. Moreover, third-party payers may deny
reimbursement if they determine that a device was not used in accordance with
cost-effective treatment methods as determined by the payer or was experimental.
Similar initiatives to limit the growth of health care costs, including price
regulation, are also underway in several other countries in which the Company
does business. Implementation of health care reforms now under consideration in
other countries may limit the price of, or the level at which reimbursement is
provided for, the Company's products. The ability of customers to obtain
appropriate reimbursement for their products and services from government and
third-party payers is critical to the success of all medical device companies
around the world. Several foreign governments have attempted to dramatically
reshape reimbursement policies affecting medical devices. Further restrictions
on reimbursement of the Company's customers will likely have an impact on the
products purchased by customers and the prices they are willing to pay.


RIGScan and ACT. The Company does not currently have marketing approval for any
RIGScan or ACT products, However, if commercialized, these products will be
marketed to hospitals and other users that bill various third party payers,
including government programs, such as federal Medicare and state Medicaid, and
private insurance plans, for the health care services provided to their
patients. Third party payers carefully review and are increasingly challenging
the prices charged for medical products and services. Although the Company
intends to establish the prices for its products according to criteria believed
to be acceptable to third party payers, there can be no assurance that such
payers will not deny reimbursement on the basis that the Company's products are
not in accordance with established payer policies regarding cost effective
treatment methods, or on some other basis. There can be no assurance that the
Company would be able to provide economic and medical data to overcome any third
party payer objections. In foreign markets, reimbursement is obtained from a
variety of sources, including governmental authorities, private health insurance
plans, and labor unions. In most foreign countries, there are also private
insurance systems that may offer payments for alternative therapies. Although
not as prevalent as in the United States, health maintenance organizations are
emerging in certain European countries. The Company may need to seek
international reimbursement approvals, although there can be no assurance that
any such approvals will be obtained in a timely manner or at all. Failure to
receive international reimbursement approvals could have an adverse effect on
market acceptance of the Company's products in the international markets in
which such approvals are sought. There can be no assurance, as to either United
States or foreign markets, that third party reimbursement and coverage of newly
approved products will be available or adequate, that current reimbursement
policies of third party payers will not be decreased in the future, or that
future legislation, regulation, or reimbursement policies of third party payers
will not otherwise adversely affect the demand for the Company's products, or
its ability to sell its products on a profitable basis. If third party payer
coverage or reimbursement is unavailable or inadequate, the Company's business,
financial condition, and results of operations could be materially adversely
affected. See "--Marketing and Distribution."


Product Liability


The testing, marketing and sale of the Company's products could expose the
Company to liability claims. The Company currently has product liability
insurance which, the Company believes, is adequate for its current activities.
There can be no assurance, however, that the Company will be able to continue to
obtain such additional insurance at a reasonable cost, if at all, or that such
insurance would be sufficient to cover any liabilities resulting from any
product liability claims, or that the Company will have funds available to pay
any claims over the limits of its insurance. Either an underinsured or an
uninsured claim could have a material adverse effect on the Company's business,
operating results, and financial condition.


                                       17
<PAGE>   18

Need to Manage a Changing Business


The Company's business has experienced certain developments since the beginning
of 1998, many of which have resulted in several significant changes in the
Company's strategy and business plan, including downsizing to what the Company
considers to be the minimal level of management and employees necessary to
operate a publicly traded medical device business. The Company believes its
restructured organization is appropriate to support modest growth over the next
few years. However, losing any members of the management team could have an
adverse effect on the Company's operations. The Company's success is dependent
on its ability to attract and retain technical and management personnel with
expertise and experience in the medical device business. The competition for
qualified personnel in the medical device industry is intense and, accordingly,
there can be no assurance that the Company will be successful in hiring or
retaining the requisite personnel. The Company's future success will depend, to
a significant extent, on the ability of its current and future management
personnel to operate effectively. There can be no assurance that the Company's
personnel, systems, procedures, and controls will be adequate to support the
Company's future operations. Any failure to implement and improve the Company's
operational, financial, and management systems or to expand, train, motivate or
manage employees could have a material adverse effect on the Company's business,
financial condition, and results of operations. The Company's future success
will depend, in part, on management's ability to manage future growth, and there
can be no assurance that these efforts will be successful. See "Item 9.
Directors, Executive Officers, Promoters, and Control Persons; Compliance with
Section 16(a) of the Exchange Act."


Low Stock Price


The Company's common stock traded for less than $1.00 per share for much of
1999. As a result of this low trading price, the Company's common stock was
delisted from the Nasdaq Stock Market ("Nasdaq") on July 27, 1999. Delisting may
adversely affect the ability of the Company to attract new investors.


Anti-Takeover Provisions



The Company has adopted a Shareholder Rights Plan. Certain provisions of the
Shareholder Rights Plan and certain of the Company's charter provisions and
applicable corporate laws could be used to hinder or delay a takeover bid for
the Company. Such provisions may inhibit takeover bids and decrease the chance
of stockholders realizing a premium over market price for their common stock as
a result of a takeover. The Board amended the Shareholder Rights Plan in
February 1999, to permit an equity investment in the Company.



Blank Check Preferred Stock


The Company's Certificate of Incorporation authorizes the issuance of "blank
check" preferred stock with such terms as may be set by the Board of Directors.
500,000 shares of preferred stock have been designated as Series A Junior
Participating Preferred Stock and reserved for issuance under the Company's
Shareholder Rights Plan. If the Company issues preferred stock, the issuance
could be used to thwart a takeover bid and may have a dilutive effect upon the
Company's common stockholders


No Dividends


The Company has never paid dividends on its common stock. The Company intends to
retain any future earnings to finance its growth. Accordingly, any potential
investor who anticipates the need for current dividends from its investment
should not purchase any of the common stock offered hereby. See "Item 5. Market
for common Equity and Related Stockholders Matters."


ITEM 2.  DESCRIPTION OF PROPERTY


The Company currently leases its office at 425 Metro Place North, Dublin, Ohio.
The Company executed a lease agreement, commencing on January 1, 1997 and ending
in August 2003, with the landlord of these facilities for approximately 25,000
square feet. The lease provides for a monthly base rent of approximately $19,100
in 2000



                                       18
<PAGE>   19

and increases to $21,000 in 2003. During December 1998 and February 1999 the
Company executed two lease agreements to sublease approximately 2,600 square
feet and 4,600 square feet of the Company's office space, respectively. The two
subleases are expected to generate monthly sublease income of approximately
$5,300 in 2000 increasing to $6,000 in 2003. The Company and its subtenants must
also pay a pro-rata portion of the operating expenses and real estate taxes of
the building. Neoprobe believes these facilities are in good condition and will
be adequate for its needs for the foreseeable future.


ITEM 3.  LEGAL PROCEEDINGS


In June 1996, a lawsuit against the Registrant was terminated by dismissal. The
Registrant was named as an additional party defendant in the In Re Blech
Securities litigation pending in the United States District Court for the
Southern District of New York before Judge Robert Sweet in March 1995. The
plaintiffs were eight named individuals who were alleged to be representatives
of a class of securities purchasers. The defendants included David Blech, who
was a principal stockholder of the Registrant until September 1994, Mark
Germain, who was a director of the Registrant until September 1994, D. Blech &
Co., a registered broker-dealer owned by Mr. Blech, trustees of certain trusts
established by Mr. Blech, Bear Stearns & Co., Baird Patrick & Co., Parag Saxena
and Chancellor Capital Corp., as well as the Registrant and 10 other
corporations of which Mr. Blech was a principal stockholder (the "Corporate
Defendants"). The complaint alleged that David Blech and D. Blech & Co.
conducted a scheme intended to artificially inflate the prices of securities
issued by corporations Mr. Blech controlled; that Mr. Blech, D. Blech & Co. and
corporations controlled by Mr. Blech gave or sold cheap stock to fund managers
in order to induce them to participate in this scheme; and that David Blech, his
trusts, D. Blech & Co., Baird Patrick, Bear Stearns, the Corporate Defendants
and unnamed other persons engaged in sham transactions, including "round trip"
sales, for the purpose of artificially inflating trading volumes and securities
of corporations controlled by Mr. Blech and maintaining their trading prices.
The complaint alleged that David Blech was the controlling person and Mark
Germain was a director of the Corporate Defendants, and that the knowledge and
participation of Messrs. Blech and Germain in the alleged scheme were the
responsibility of the Corporate Defendants. The complaint also alleged that the
Corporate Defendants actively engaged in the alleged scheme and benefited from
it. The complaint further alleged that all of the defendants engaged in a
conspiracy to manipulate the market, and failed to disclose truthful information
about the true value of securities issued by corporations controlled by Mr.
Blech. The complaint alleged violations of Securities and Exchange Commission
Rule 10b-5 and common law fraud by all defendants, violations of the Racketeer
Influenced Corrupt Organizations Act (RICO) by defendants other than the
Corporate Defendants and liability under Securities Exchange Act 20(a), as the
liability of controlling persons, by Messrs. Blech and Germain and D. Blech &
Co., Baird Patrick and Bear Stearns. The amount of damages requested was not
specified in the complaint. In June 1996, Judge Sweet dismissed the allegations
against the Registrant and the other Corporate Defendants because the plaintiffs
had failed to identify the alleged fraudulent acts of the Registrant and the
other Corporate Defendants with the specificity required by federal law. The
dismissal terminated the action against the Registrant without any findings of
liability against Registrant in July 1996. The Judge's order can still be
appealed, and the time for appeal will not begin to run until a final judgment
has been entered in the entire multi-party proceeding.


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS


None.



                                       19
<PAGE>   20
                                     PART II


ITEM 5.  MARKET FOR COMMON EQUITY AND RELATED STOCKHOLDER MATTERS


The common stock of the Company trades on the OTC Bulletin Board (since being
delisted from the Nasdaq Stock Market on July 27, 1999) under the trading symbol
"NEOP". The prices set forth below reflect the high and low sale prices for
shares of common stock during the last two fiscal years as reported by the
Nasdaq Stock Market through July 27, 1999 and Reuters Limited thereafter.


                                                          HIGH            LOW
                                                          ----            ---
                      Fiscal Year 1999
                      First Quarter                      $ 1.44         $ 0.78
                      Second Quarter                       1.06           0.56
                      Third Quarter                        1.25           0.31
                      Fourth Quarter                       0.91           0.38

                      Fiscal Year 1998
                      First Quarter                      $ 6.75         $ 4.00
                      Second Quarter                       6.56           2.38
                      Third Quarter                        3.06           0.75
                      Fourth Quarter                       2.50           0.44

As of March 24, 2000, the Registrant had approximately 691 holders of common
stock of record.


The Company has not paid any dividends on its common stock and does not
anticipate paying cash dividends in the foreseeable future. The Company intends
to retain any earnings to finance the growth of its business. There can be no
assurance that the Company will ever pay cash dividends, see Item 7.
Management's Discussion and Analysis of Financial Condition and Results of
Operations.


Recent Sales of Unregistered Securities


The following sets forth certain information regarding the sale of equity
securities of the Company during the period covered by this Report that were not
registered under the Securities Act of 1933.


In February 1999 and July 1998, the Board of Directors of the Company authorized
the issuance of 13,734 and 2,893 shares of common stock, respectively, to the
trustees of its 401(k) employee benefit plan without registration. Such issuance
is exempt from registration under the Act under Section 3(a)(2). The Plan is a
pension, profit sharing or stock bonus plan that is qualified under Section 401
of the Internal Revenue Code. The assets of the Plan are held in a single trust
fund for the benefit of the employees of the Company which does not hold assets
for the benefit of the employees of any other employer. All of the contributions
to the plan from employees of Neoprobe have been invested in assets other than
common stock. All of the common stock held by the plan has been contributed to
the plan by the Company as a matching contribution and has been less in value at
the time it was contributed to the plan than the employee contributions which it
matches.

                                       20
<PAGE>   21

ITEM 6.  SELECTED FINANCIAL DATA


The following summary financial data are derived from consolidated financial
statements of the Company which have been audited by the Company's independent
public accountants. These data are qualified in their entirety by, and should be
read in conjunction with, the Company's Consolidated Financial Statements and
Notes thereto included herein.



<TABLE>
<CAPTION>
(Amounts in thousands, except per share data)                        Years Ended December 31,
                                            ------------------------------------------------------------------
                                               1999          1998          1997         1996           1995
                                            ----------   -----------   -----------   ----------   ------------
<S>                                           <C>           <C>          <C>          <C>              <C>
Statement of Operations Data:
Net sales                                     $ 9,246       $ 5,833      $  5,128     $  1,171         $  960
Gross profit                                    4,938         4,429         3,552          494            454
Research and development expenses               1,313        14,364        19,657       16,083          7,829
Marketing and selling expenses                  4,471         5,268         4,307        1,532
General and administrative expenses             3,735         6,089         6,853        6,222          4,148
Loss related to subsidiaries in                   475         7,176             -            -              -
liquidation                                  ----------   -----------   -----------   ----------   ------------

Loss from operations                           (5,057)      (28,468)      (27,265)     (23,342)       (11,523)

Other income                                      883           436         4,018        2,373            764
                                            ----------   -----------   -----------   ----------   ------------

Net loss                                      $(4,174)    $ (28,033)     $(23,247)    $(20,969)     $ (10,759)
                                            ==========   ===========   ===========   ==========   ============

Loss attributable to common stockholders     $ (7,895)    $ (28,033)     $(23,247)    $(20,969)     $ (10,759)
                                            ==========   ===========   ===========   ==========   ============

Net loss per common share from continuing
 operations (basic and diluted)(1)            $ (0.34)      $ (1.23)      $ (1.02)    $  (1.06)       $ (0.73)
                                            ==========   ===========   ===========   ==========   ============

Shares used in computing net loss per
 common share (1)                              23,003        22,842        22,735       19,743         14,726
                                            ==========   ===========   ===========   ==========   ============
</TABLE>


<TABLE>
<CAPTION>
                                                                   As of December 31,
                                            ------------------------------------------------------------------

                                              1999             1998          1997         1996           1995
                                            ----------   -----------   -----------   ----------   ------------
<S>                                        <C>           <C>            <C>          <C>            <C>
Balance Sheet Data:
Total assets                               $   10,323    $   11,994     $  41,573    $  63,873      $  24,145

Long-term obligations                           4,314           156         2,069        1,009          1,182

Accumulated deficit                         (119,569)     (115,395)      (87,363)     (64,116)       (43,147)
</TABLE>


(1) Net loss per common share is based on the weighted average number of common
shares outstanding during the year. The loss per share for all periods presented
excludes the number of common shares issuable upon the conversion of preferred
stock and the number of shares issuable upon exercise of outstanding stock
options and warrants since such inclusion would be anti-dilutive.

                                       21

<PAGE>   22


ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS


The statements contained in this Management Discussion and Analysis of Financial
Condition and Results of Operations and other parts of this Report that are not
purely historical or which might be considered an opinion or projection
concerning the Company or its business, whether express or implied, are
forward-looking statements within the meaning of the Private Securities
Litigation Reform Act of 1995. These statements may include statements regarding
the Company's expectations, intentions, plans or strategies regarding the future
which involve risks and uncertainties. All forward-looking statements included
in this document are based on information available to the Company on the date
hereof, and the Company assumes no obligation to update any such forward looking
statements. It is important to note that the Company's actual results in 2000
and future periods may differ significantly from the prospects discussed in the
forward-looking statements. Factors that could cause or contribute to such
differences include, but are not limited to, limited revenues, continuing net
losses, accumulated deficit, future capital needs, uncertainty of capital
funding, dependence on exclusive distributor, competition, limited marketing
experience, limited manufacturing experience, dependence on principal product
line, uncertainty of market acceptance, patents, proprietary technology and
trade secrets, government regulation, risk of technological obsolescence,
limited third party reimbursement, product liability, need to manage a changing
business, possible volatility of stock, anti-takeover provisions, dependence on
key personnel, and no dividends.


BUSINESS ENVIRONMENT


The global diagnostic and medical devices industries are going through a period
of transition. Unlike the pharmaceutical and biotechnology fields, the
diagnostic and medical device sectors have been hampered by maturity in product
demand, which has led to single digit growth rates over the past several years.
In addition to decreased volume demand, health care cost containment pressures
have limited top-line as well as bottom-line growth. As a result, the industry
has experienced a number of consolidated mergers, reorganizations, and
management changes. The business environment is more positive for the device
companies who have slightly higher growth and technological innovation.
Conditions will likely continue to be difficult for the diagnostic and medical
device industry in 2000 although some experts believe medical device companies
are likely to fair better with regard to growth and profitability than their
diagnostic counterparts.

LIQUIDITY AND CAPITAL RESOURCES

Operating Activities. Through December 31, 1999, the Company's activities have
resulted in an accumulated deficit of $120 million. Substantially all of the
Company's efforts and resources through early 1999 were devoted to research and
clinical development of innovative systems for the intraoperative diagnosis and
treatment of cancers. Prior to 1999, these efforts were principally related to
the Company's proprietary RIGS system. Efforts since early 1997 have also
included activities related to development of the Company's ACT process and ILM
products. To date, the Company's activities have been financed primarily through
the public and private sale of equity securities.

Beginning in the first half of 1998, due primarily to feedback received from
regulatory authorities in the U.S. and Europe related to the Company's
applications for marketing approval for its RIGScan CR49 product, the Company
began a series of changes to its business plan. Since that time, the Company has
continued to modify its business plan to one that is primarily focused on the
continued development of the Company's ILM business. During 1999, the Company
has continued the operating expense reduction efforts started in 1998 and has
almost entirely eliminated non-ILM-related research and development activities.
To further support the Company's goal of achieving operating profitability, the
Company entered into a multi-year Distribution Agreement with EES, a subsidiary
of Johnson & Johnson, effective October 1, 1999. As a result of entering the
agreement, the Company achieved its first quarter of operating profitability
during the fourth quarter of 1999. The Company expects to continue to achieve
operating profitability on an annual basis for 2000; however, the Company
anticipates there may be quarterly variations due to the timing of purchases by
EES. There can be no assurances that the Company will achieve the volume of
sales anticipated in connection with the agreement, or if achieved, that the
margin on such sales will be adequate to achieve operating profitability in the
near term, or at all.

Accounts receivable declined significantly at December 31, 1999 from the prior
year due primarily to the timing of fourth quarter sales in both years and the
transition from selling to multiple customers during the fourth quarter of 1998
versus selling only to EES during the fourth quarter of 1999. The majority of
fourth quarter 1998 sales were


                                       22
<PAGE>   23

made in December 1998 following the release of the neo2000 system as opposed to
more evenly over the quarter in 1999. Inventory levels also declined at December
31, 1999 from the prior year. This is primarily due to the Company producing
inventory to meet EES' specific forecasted needs during the fourth quarter of
1999 as opposed to the Company stocking inventory for anticipated customer
demand at the end of 1998. Inventory at December 31, 1999 includes approximately
$625,000 in demonstration equipment repurchased from KOL and refurbished but not
yet shipped to EES as of December 31, 1999. The Company expects receivable
levels to fluctuate in 2000 depending on the timing of purchases by EES;
however, inventory is expected to decrease over time as the strategic
relationship progresses and the Company manages its production and sales to meet
EES's forecasted needs.


Investing Activities. The Company's investing activities during 1999 involved
primarily the sale of certain available-for-sale securities to fund operations.
The Company engaged in similar activities in 1998. However, in 1998, the Company
also made significant capital expenditures on construction at Neoprobe Israel.
Neoprobe Israel was founded in 1994 to construct and operate a radiolabeling
facility near Dimona, Israel. Based on the status of the Company's marketing
applications in the U.S. and Europe, and the Company's inability to find a
development partner for its RIGS products, the Company decided during 1998 to
suspend construction and validation activities at Neoprobe Israel. Following
suspension of RIGS development activities at Neoprobe Israel and unsuccessful
attempts to market the facility, the Company initiated actions during the fourth
quarter of 1998 to liquidate Neoprobe Israel. The Company, therefore, adopted
the liquidation basis of accounting for Neoprobe Israel as of December 31, 1998.
The Company wrote down the value of the fixed assets of the facility and the
related debt to the net amount of zero as the assets were considered to
represent settlement of the debt. Approximately $4.9 million of the construction
of Neoprobe Israel's facility was financed in 1998 and prior years by an Israeli
bank (the "Bank"). During October 1999, a representative of the Bank was
appointed as Receiver for Neoprobe Israel. As a result of the receivership,
management believes that the Company no longer controls Neoprobe Israel. As a
result, Neoprobe Israel was deconsolidated as of December 31, 1999. The
Company's consolidated balance sheet at December 31, 1999, therefore, does not
reflect the financial position of Neoprobe Israel. A more detailed description
of the effects on cash flow related to Neoprobe Europe and Neoprobe Israel can
be found in footnotes 9 and 10 to the 1999 financial statements.

The Company expects the Receiver to attempt to sell the facility and/or its
equipment and to use any proceeds to repay the creditors of Neoprobe Israel to
the extent possible. Management of the Company continues to believe that
Neoprobe Corporation's only ongoing contractual obligation related to Neoprobe
Israel relates to the limited amount guarantee which is fully secured through
$993,000 on deposit with the bank. It is also possible that the Company may be
subject to additional claims related to Neoprobe Israel. Management does not
believe such claims, if any, would have a material adverse affect on the
Company's financial position or results of operations.

Financing Activities. On February 16, 1999, the Company executed a Purchase
Agreement (the "Purchase Agreement") to complete the private placement of 30,000
shares of 5% Series B convertible preferred stock (the "Series B") for gross
proceeds of $3 million ($2.8 million, net). The Series B were issued with a $100
per share stated value and were convertible into common stock of the Company. In
connection with the private placement, the Company also issued 2.9 million Class
L warrants to purchase common stock of the Company at an initial exercise price
of $1.03 per share. The Series B paid a 5% annual dividend payable in cash or
common stock. The Series B were convertible at variable prices based on the
market price of the Company's common stock, subject to a conversion price floor
of $0.55. The Class L warrants were also subject to variable exercise prices,
subject to an exercise price floor of $0.62. Holders of the Series B had certain
liquidation preferences over other shareholders under certain provisions as
defined in the Purchase Agreement and had the right to cast the same number of
votes as if the owner had converted on the record date. Pursuant to the private
placement, the Company entered into a financial advisory agreement with the
placement agent providing the agent with Unit Purchase Options ("UPOs")
entitling the placement agent to purchase approximately 150,000 shares of common
stock in the Company. Under certain conditions, the Company would have been
obligated to redeem outstanding shares of Series B for $120 per share (i.e., a
total of $3.6 million ) such as the delisting of the Company's common stock from
the Nasdaq Stock Market as occurred on July 27, 1999 and other conditions
outlined in the Purchase Agreement. In January, 2000, the Company negotiated a
settlement with the Series B holders whereby the Series B shares and the related
warrants



                                       23
<PAGE>   24
were retired in exchange for $2.5 million in cash, 3 million shares of common
stock and 3 million warrants to purchase common stock at an exercise price of
$0.74 per share.

The Series B were recorded by the Company during the first quarter of 1999 at
the amount of gross proceeds less the costs of the financing and the fair value
of the warrants and classified as mezzanine financing above the stockholders'
equity section on the Company's interim balance sheets for 1999. The calculated
conversion price at February 16, 1999, the first available conversion date, was
$1.03 per share. In accordance with the FASB's Emerging Issues Task Force Topic
D-60, the difference between the initial conversion price and the closing market
price on February 16, 1999 of $1.81 resulted in an implied incremental yield to
Series B holders of approximately $1.8 million that is reflected as conversion
discount in the Company's loss per share calculation for 1999. During the third
quarter of 1999, management assessed the likelihood of redemption of the Series
B as probable. As a result, the recorded book value of the Series B was accreted
by approximately $1.8 million to bring the book value of the Series B up to the
full redemption value of $3.6 million. This accretion is also reflected in the
Company's loss per share calculation for 1999.

On November 12, 1999, the Company entered into a binding letter of intent to
retire the Series B, the Class L warrants and the UPOs and to cancel the
financial advisory agreement with the placement agent (See Note 18(a).). The
letter of intent committed the Series B holders to surrender the Series B shares
and Class L warrants and for the placement agent to surrender the UPOs and
cancel the financial advisory agreement as well as to grant the Company general
releases from potential litigation associated with the transaction. In exchange
for the retirement of the Series B preferred shares and surrendering the Class L
warrants and UPOs, the Company paid the Series B holders a total of $2.5 million
and issued the Series B holders 3 million shares of common stock and 3 million
warrants to purchase common stock with an exercise price of $0.74 per share.
However, at December 31, 1999, final definitive agreements had not yet been
signed. Therefore, at December 31, 1999, the Company reclassified its
obligations to the Series B holders to reflect the $2.5 million payable in cash
as a current liability and the remaining book value of the Series B, including
dividends payable, as a long-term liability that will then be reclassified
during the first quarter of 2000 to additional paid-in capital concurrent with
the execution of the definitive agreement. The transaction will be reported in
the Company's financial statements for the first quarter of 2000. The Company
expects to report a loss on the retirement of the preferred shares of $1.2
million (approximately $0.05 per share) below net income during the first
quarter of 2000 . This amount is intended to represent the value of the cash
given up plus the market value of the stock and warrants issued as valued on
January 20, 2000 less the previously recorded book value of the Series B
preferred stock and warrants.

Operational Outlook. The Company's only approved products are instruments and
related products used in gamma guided surgery. The Company does not currently
have a RIGS drug or ACT product approved for commercial sale in any major
market. The Company entered into a Distribution Agreement (the "Agreement") with
EES effective October 1, 1999, for an initial five-year term with options to
extend for two successive two-year terms. Under the Agreement, the Company will
manufacture and sell its ILM products (the "Products") exclusively to EES who
will distribute the Products globally. EES agreed to purchase minimum quantities
of the Company's Products over the first three years of the term of the
Agreement and to reimburse the Company for certain research and development
costs and a portion of the Company's warranty costs. EES also agreed to purchase
the demonstration units repurchased from KOL at cost. The Company is obligated
to continue certain product maintenance activities and to provide ongoing
regulatory support for the Products. As a result of entering the Agreement, the
Company expects to achieve operating profitability on an annual basis in the
near term. However, there can be no assurances that the Company will achieve the
volume of sales anticipated in connection with the Agreement, or if achieved,
that the margin on such sales will be adequate to achieve operating
profitability on either an interim or annual basis in the near term, or at all.

Under the Agreement, EES received a non-exclusive, worldwide paid-up license
(the "License") to the Company's ILM intellectual property to make and sell
other products that may be developed using the Company's ILM intellectual
property. The term of the License is the same as that of the Agreement. EES paid
the Company a non-refundable license fee of $4 million. The Company intends to
recognize the license fee as revenue ratably over the five-year initial term of
the Agreement. If the Agreement is terminated by the Company as a result of a
material breach by EES, EES would be required to pay the Company a royalty on
all products developed and sold by EES



                                       24
<PAGE>   25
using the Company's ILM intellectual property. In addition, the Company is
entitled to a royalty on any ILM product commercialized by EES that does not
infringe any of the Company's existing intellectual property.

As of December 31, 1999, the Company had cash and cash equivalents of $4.9
million. The Company expects to generate positive cash flow from operations in
the near term as a result of the Agreement with EES. However, there can be no
assurances that the Company will achieve the volume of sales anticipated in
connection with the Agreement, or if achieved that the margin on such sales will
be adequate to produce positive operating cash flow. The Company expects to
continue to experience cost savings during 2000 as a result of the transfer of
marketing responsibilities for the Company's ILM products to EES. In January
2000, the Company sold its investment in XTL Biopharmaceuticals Ltd. for $1.5
million. The Company believes its year end 1999 cash balances and sources of
future cash flow are adequate for the Company to continue operating for the
foreseeable future. However, if the Company does not receive adequate funds from
operations, it may need to further modify its business plan and seek other
financing alternatives. Such alternatives may include asset dispositions that
could force the Company to further change its business plan.

In recent months, the Company has been approached by entities interested in
acquiring some or all of the assets of the Company. The Company is currently
engaged in discussions with certain entities; however, such discussions to this
point have been only preliminary in nature and none has resulted in a proposed
transaction for further consideration. The Company anticipates that it may, from
time to time, continue to be approached by such entities. At such time as a
definitive transaction is proposed, if any, it will be considered by management
and the Board of Directors, and if necessary, referred to the shareholders of
the Company for their consideration. However, there can be no assurances that
such a transaction will be proposed, or if proposed, that the terms would be
acceptable to the Company or its shareholders.

At December 31, 1999, the Company had U.S. net operating tax loss carryforwards
and tax credit carryforwards of approximately $93.3 million and $4.9 million,
respectively, available to offset or reduce future income tax liability, if any,
through 2019. However, under Sections 382 and 383 of the Internal Revenue Code
of 1986, as amended, use of prior tax loss and credit carryforwards may be
limited after an ownership change. As a result of ownership changes as defined
by Sections 382 and 383, which have occurred at various points in the Company's
history, management believes utilization of the Company's tax loss carryforwards
and tax credit carryforwards may be limited. The Company's international
subsidiaries also have net operating tax loss carryforwards in their respective
foreign jurisdictions. However, as the Company is in the process of liquidating
its interests in both foreign subsidiaries as of December 31, 1999, the Company
does not anticipate that the foreign loss carryforwards will ever be utilized.

Impact of Recent Accounting Pronouncements. In June 1998, the Financial
Accounting Standards Board issued Statement of Financial Accounting Standards
("SFAS") No. 133, Accounting for Derivative Instruments and Hedging Activities.
SFAS No. 133 was originally required to be adopted in years beginning after June
15, 1999; however, SFAS No. 137 deferred the effective date to fiscal quarters
beginning after June 15, 2000. The Company expects to adopt SFAS No. 133
effective July 1, 2000. The Statement will require companies to recognize all
derivatives on the balance sheet at fair value. Derivatives that are not hedges
must be adjusted to fair value through income. If a derivative is a hedge,
depending on the nature of the hedge, changes in the fair value of the
derivative will either be offset against the change in fair value of the hedge
asset, liability or firm commitment through earnings, or recognized in other
comprehensive income until the hedge item is recognized in earnings. The
ineffective portion of a derivative's change in fair value will be immediately
recognized in earnings. The Company does not anticipate that the adoption of
this Statement will have a significant effect on its results of operations or
financial position.

Y2K. The Company addressed the Y2K issue through an assessment and readiness
plan initiated during 1998 and completed during the third quarter of 1999. The
total cost to the Company of completing the required modifications, upgrades, or
replacements of its internal systems and related software was approximately
$20,000, the majority of which was incurred during 1999. To date, the Company is
not aware of any significant Y2K-related problems that may have occurred with
its supply, manufacturing, or financial chains, or with the Company's own
business systems.


                                       25
<PAGE>   26

RESULTS OF OPERATIONS


During 1998, the Company began revising its business plan to focus on its ILM
technology and essentially suspended activities related to its RIGS and ACT
initiatives pending identification of a developing partner. The Company is
involved in preliminary due diligence with parties interested in commercializing
a second-generation antibody for use in colorectal cancer surgery. At this time,
the Company has not reached definitive agreement with any party that would
ensure the continued development of the RIGS process. In addition, should a
party or parties ultimately decide to move forward with development of a RIGS
product and be able to reach an agreement satisfactory to the Company, the
Company believes that the likely timeframe required for continued the
development, regulatory and commercialization of a RIGS product would likely
take a minimum of four to five years before the Company received any significant
product-related royalties. However, there can be no assurance that the Company
will be able to complete definitive license agreements with a development
partner for the RIGS technology and does not know if a partner will be obtained
on a timely basis, on terms acceptable to the Company, or at all. To date, a
partner for ACT has not been identified or secured. Until definitive agreements
with development partners are reached and the appropriate regulatory approvals
are received, the Company is limited in its ability to generate revenue from
RIGS or ACT. The Company therefore intends to continue to focus on further
development of the ILM market in conjunction with its new distribution partner,
EES.


Research and development expenses during 1999 were $1.3 million, or 13% of
operating expenses for the year. Marketing and selling expenses were $4.5
million, or 45% of operating expenses for the year, and general and
administrative expenses were $3.7 million, or 37% of operating expenses for the
year. Overall, operating expenses for 1999 decreased $22.9 million or 70% from
1998. The Company anticipates that total operating expenses for 2000 will also
decrease from 1999 levels. The Company expects research and development expenses
will increase moderately during 2000 as the Company performs instrument-related
research in connection with EES and investigates and evaluates potential
procedural product expansions related to ILM. The Company expects general and
administrative expenses to decrease from 1999 levels as a result of headcount
reductions and other modifications to the business plan adopted during 1999.
Marketing and selling expenses, as a percentage of sales, decreased to 48% of
sales in 1999 from 90% of sales in 1998. The Company expects marketing and
selling expenses for 2000 to decrease from 1999 levels as a result of severing
the majority of the Company's internal marketing team in connection with
entering into the distribution agreement with EES.


Years ended December 31, 1999 and 1998.


Revenues and Margins. Net sales increased $3.4 million or 59% to $9.2 million in
1999 from $5.8 million in 1998. Sales during both years were comprised almost
entirely of sales of the Company's hand-held gamma detection instruments. The
increase in instrument sales is the result of entering the distribution
agreement with EES effective October 1, 1999, sales of the neo2000 system for a
full year in 1999 versus one quarter in 1998, and the continuing growth of the
lymphatic mapping technique in the surgical oncology marketplace. Gross margins
decreased to 53% of net sales in 1999 from 76% of net sales in 1998 due to a
higher proportion of sales made in 1999 under various distributor arrangements
that were not in place in 1998. The Company expects gross margins in 2000 to
approximate gross margins experienced during 1999. In addition, approximately
25% of the Company's $4.2 million in fourth quarter revenues were related to the
sale of products to EES to be used for demonstration purposes. Fourth quarter
1999 product sales to EES likely also included some amount of inventory to
create a safety stock of inventory at EES distribution centers. As a result, the
Company does not expect quarterly sales during 2000 to reach fourth quarter 1999
levels. However, the Company does expect the overall gross margin on sales for
2000 to increase from the 37% gross margin experienced during the fourth quarter
of 1999. Revenues in 1999 also include recognition of $200,000 of license fees
by the Company during the fourth quarter.


Research and Development Expenses. Research and development expenses decreased
$13.1 million or 91% to $1.3 million in 1999 from $14.4 million in 1998.
Approximately $9.9 million of the decrease is due to the suspension during 1998
of substantially all research and development activities related to the
Company's RIGS and ACT initiatives. The remainder of the decrease is due to
expenses incurred during the first nine months of 1998 related to the
development of the neo2000 system and related instruments that were commercially
launched during the fourth



                                       26
<PAGE>   27

quarter of 1998. Expenses in 1999 also included a non-cash write-off of
approximately $218,000 in capitalized pre-production costs written off as a
result of recent accounting guidance issued by the Emerging Issues Task Force.


Marketing and Selling Expenses. Marketing and selling expenses, excluding a
one-time $700,000 charge related to termination of the Company's agreement with
KOL, decreased $1.5 million or 28% to $3.8 million in 1999 compared to $5.3
million in 1998. Excluding the KOL charge, marketing expenses, as a percentage
of sales, decreased to 41% of sales in 1999 from 90% of sales in 1998. These
results reflect lower internal marketing expense levels in 1999 as compared to
1998, offset by increases in marketing partner commissions over the same
periods. Marketing expenses in 1999 also included $296,000 in separation charges
related to personnel who were severed in connection with the signing of the EES
Agreement.


General and Administrative Expenses. General and administrative expenses
decreased $2.4 million or 39% to $3.7 million in 1999 from $6.1 million in 1998.
The decrease was primarily a result of reductions in headcount during 1998 and
declines in asset impairment charges and other headcount-related overhead costs
such as space costs, taxes and insurance. These cost decreases were offset by
$106,000 in severance charges in 1999 related to personnel who were severed in
connection with the signing of the EES Agreement in October, 1999.


Losses Related to Subsidiaries in Liquidation. The losses decreased $6.7 million
or 93% to $475,000 in 1999 from $7.2 million in 1998. During 1999, the losses
relate to interest and other over head costs incurred during the wind-down
process. Costs in 1998 include $1.7 million of asset impairment and $235,000 of
severance and other exit costs related to the decision in the third quarter of
1998 to shutdown and liquidate Neoprobe Europe, and $5.1 million of asset
impairment and $79,000 of severance and other exit costs related to the decision
in the fourth quarter of 1998 to shutdown and liquidate Neoprobe Israel.


Other Income. Other income increased $447,000 or 103% to $883,000 in 1999 from
$436,000 in 1998. Other income during 1999 included a $699,000 non-cash gain on
deconsolidation of subsidiaries, $226,000 in one-time gains from the settlement
of certain previously recorded liabilities at less than their original face
value, and interest income on the Company's investments, offset by $60,000 in
losses on the disposal of certain assets. Other income in 1998 consisted
primarily of interest income. The Company's interest income declined due to the
decline in overall average levels of investments during 1999 as compared to
1998.


Years ended December 31, 1998 and 1997


Revenue and Margins. Net sales increased $705,000 or 14% to $5.8 million in 1998
from $5.1 million in 1997. Net sales in both years were composed almost entirely
of instrument sales. Instrument sales in 1997 reflect contributions from the
Company's marketing arrangement with USSC which was terminated in October 1997.
Instrument sales during 1998 were based on leads generated primarily by the
Company's clinical specialist sales force with assistance from representatives
of EES under the terms of the Company's previous marketing relationship with
EES. Gross margins increased to 76% of net sales in 1998 from 69% of net sales
in 1997 due primarily to improved manufacturing efficiencies resulting in a
lower overall cost of production for the neo2000 control unit and the 14mm probe
as compared to the Neoprobe 1500 and the 19mm probe.


Research and Development Expenses. Research and development expenses decreased
$5.3 million or 27% to $14.4 million in 1998 from $19.7 million in 1997. The
decrease reflects the Company's efforts to reduce costs consistent with the
refocused business plan announced in February 1998, which was further modified
in the third and fourth quarters of 1998. Research and development costs in 1998
include approximately $1 million related to severance and other
separation-related costs and an impairment charge of $1 million related to
technology licensed from the Dow Chemical Company. Such costs were offset by
decreases in project expenses related to RIGScan CR49 pending identification of
a development partner and decreases in instrument-related project expenses due
to the wind-down of the design phase of neo2000 control unit and related
products. Pipeline projects also decreased related to the refocused business
plan.



                                       27
<PAGE>   28



Marketing and Selling Expenses. Marketing and selling expenses increased by
$960,000 or 22% to $5.3 million in 1998 from $4.3 million in 1997. The increase
in marketing expenses during 1998, as compared to the same period in 1997,
relates to an increased marketing effort to meet competitive pressure and
further penetrate the ILM market. The increased expenses were the result of a
greater number of sales and marketing personnel in 1998, coupled with relative
increases in travel and entertainment as well as promotional costs associated
with the launch of new products.


General and Administrative Expenses. General and administrative expenses
decreased $764,000 or 11% to $6.1 million in 1998 from $6.9 million in 1997.
Severance and other overhead and employee separation costs of $160,000 related
to 1998 restructuring activities were offset by an overall lower headcount
during 1998 as compared to 1997. In addition, the Company recorded charges
totaling $222,000 in 1998 related to impairing or writing off assets no longer
expected to be used as a result of the Company's restructuring efforts.


Losses Related to Subsidiaries in Liquidation. Losses related to subsidiaries in
liquidation increased to $7.2 million in 1998 from $0 in 1997. This increase is
due to changes in the Company's business plan which occurred throughout 1998
that ultimately resulted in the shutdown of both of the Company's international
subsidiaries, Neoprobe Europe and Neoprobe Israel. Related to the decision to
shutdown operations at these subsidiaries, the Company adopted the liquidation
basis of accounting for both subsidiaries as of December 31,1998. Included in
losses related to subsidiaries in liquidation for 1998 is $1.7 million related
to the non-cash impairment of assets and $235,000 related to severance and other
exit costs incurred due to the decision in the third quarter to shutdown and
liquidate Neoprobe Europe. Also included in losses related to subsidiaries in
liquidation for 1998 is $5.1 million related to the primarily non-cash
adjustment of assets and liabilities to their net realizable value and $79,000
related to severance and other exit costs incurred due to the decision to
shutdown and liquidate Neoprobe Israel.


Other Income. Other income during 1998 and 1997 was $436,000 and $4.0 million,
respectively. Other income in 1998 was comprised primarily of interest income of
$599,000 compared to interest income in 1997 of $2.2 million, both of which were
offset by interest expenses on the Company's outstanding debt. The change in
interest income is the result of lower overall funds available for investment in
1998. Other income in 1997 also included miscellaneous income of $2 million
representing recognition of income from a license fee received from USSC.


ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK


The Company does not currently use derivative financial instruments, such as
interest rate swaps, to manage its exposure to changes in interest rates for its
debt instruments or investment securities. As of December 31, 1999 and 1998, the
Company had outstanding debt instruments of $790,000 and $1.5 million,
respectively. Outstanding debt consisted primarily of a variable rate line of
credit as of December 31, 1999 and 1998, with average interest rates of 8% and
7%, respectively. At December 31, 1999 and 1998, the fair market values of the
Company's debt instruments approximated their carrying values. A hypothetical
100-basis point change in interest rates would not have a material effect on
cash flows, income or market values.


Prior to 1999, the Company maintained investment portfolios of
available-for-sale corporate and U.S. government debt securities purchased with
proceeds from the Company's public and private placements of equity securities.
The market value of these investments at December 31, 1998 was approximately
$449,000.


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA


The financial statements of the Company, and the related notes, together with
the reports of KPMG LLP and PricewaterhouseCoopers LLP dated February 14, 2000
and February 20, 1998, respectively, are set forth at pages F-1 through F-27
attached hereto.



                                       28
<PAGE>   29






ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE


None.





















                                       29




<PAGE>   30


                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT.

DIRECTORS.

THE FOLLOWING DIRECTORS' TERMS SHALL CONTINUE UNTIL THE 2000 ANNUAL MEETING:

MELVIN D. BOOTH, age 55, has served as a director of the Registrant since May
1997. He has been President, Chief Operating Officer and a director of
MedImmune, Inc. since October 1998. Mr. Booth was President, Chief Operating
Officer and a director of Human Genome Sciences, Inc. from July 1995 to October
1998. Mr. Booth was with Syntex Corporation and its subsidiaries from 1975 to
1995. Mr. Booth was the President of Syntex Laboratories, Inc. from 1993 to 1995
and served as a Vice President of Syntex Corporation from 1992 to 1995. From
1992 to 1993, he served as the President of Syntex Pharmaceuticals Pacific. From
1991 to 1992, he served as an area Vice President of Syntex, Inc. From 1986 to
1991, he served as the President of Syntex, Inc., Canada. Mr. Booth also serves
as a director of SpaceLab, Inc. He has been active in U.S. pharmaceutical
industry organizations and is also a past Chairman of the Pharmaceutical
Manufacturers Association of Canada. Mr. Booth has a B.S. degree from Northwest
Missouri State University and holds a Certified Public Accountant certificate.

JOHN S. CHRISTIE, age 50, has served as a director of the Registrant since May
1997. Mr. Christie has served as President and Chief Operating Officer of
Worthington Industries, Inc. since June 1999. Mr. Christie served as President
of JMAC, Inc., an investment holding company, from September 1995 to June 1999.
From August 1988 until September 1995, he was a Senior Vice President of
Battelle Memorial Institute. Mr. Christie also serves as a director of
Karrington Health, Inc. Mr. Christie has a B.S. degree in Business
Administration from Miami University and an MBA from Emory University.

J. FRANK WHITLEY, JR., age 57, has served as a director of the Registrant since
May 1994. Mr. Whitley was Director of Mergers, Acquisitions and Licensing at The
Dow Chemical Company ("Dow"), a multinational chemical company, from June 1993
until his retirement in June 1997. After joining Dow in 1965, Mr. Whitley served
in a variety of marketing, financial, and business management functions. Mr.
Whitley has a B.S. degree in Mathematics from Lamar State University.

THE FOLLOWING DIRECTORS' TERMS SHALL CONTINUE UNTIL THE 2001 ANNUAL MEETING:

DAVID C. BUPP, age 50, has served as President and a director of the Registrant
since August 1992 and as Chief Executive Officer since February 1998. From
August 1992 to May 1993, Mr. Bupp served as Treasurer of the Registrant. In
addition to the foregoing positions, from December 1991 to August 1992, he was
Acting President, Executive Vice President, Chief Operating Officer and
Treasurer, and from December 1989 to December 1991, he was Vice President,
Finance and Chief Financial Officer. From 1982 to December 1989, Mr. Bupp was
Senior Vice President, Regional Manager for AmeriTrust Company National
Association, a nationally chartered bank holding company, where he was in charge
of commercial banking operations throughout Central Ohio. Mr. Bupp has a B.A.
degree in Economics from Ohio Wesleyan University. Mr. Bupp completed a course
of study at Stonier Graduate School of Banking.

JULIUS R. KREVANS, M.D., age 75, has served as a director of the Registrant
since May 1994 and as Chairman of the Registrant since February 1999. Dr.
Krevans served as Chancellor of the University of California, San Francisco from
July 1982 until May 1993, and now serves on the faculty of that institution's
School of Medicine. Prior to his appointment as Chancellor, Dr. Krevans served
as a Professor of Medicine and Dean of the School of Medicine at the University
of California, San Francisco from 1971 to 1982. Dr. Krevans is a member of the
Institute of Medicine, National Academy of Sciences, and led its committee for
the National Research Agenda on Aging until 1991. He is Chairman of the Bay Area
Economic Forum, a member of the Medical Panel of A.P. Giannini


                                       30

<PAGE>   31



Foundation, and a member of the Board of Directors of the Bay Area BioScience
Center. Dr. Krevans has a B.S. degree and a M.D. degree, both from New York
University.

JAMES F. ZID, age 66, has served as a director of the Registrant since November
1993. Mr. Zid also serves as a director of the Net Med Corporation. Now retired,
Mr. Zid was a partner from September 1981 until September 1993 (and served as
managing partner of the Columbus, Ohio office from September 1981 to September
1992) of Ernst & Young and its predecessors. Mr. Zid has a B.S. degree in
Accounting from St. Joseph's College.

THE FOLLOWING DIRECTOR'S TERM SHALL CONTINUE UNTIL THE 2002 ANNUAL MEETING:

MICHAEL P. MOORE, M.D., PH.D., age 49, has served as a director of the
Registrant since May 1994. Dr. Moore has been Attending Physician, Breast
Surgery, Columbia Presbyterian Medical Center since June 1986. Dr. Moore has a
B.S. degree from Boston College, a Ph.D. degree from Loyola University of
Chicago, and a M.D. degree from The Loyola Stritch School of Medicine.


EXECUTIVE OFFICERS

The executive officers of the Company and their ages and positions are as
follows:

<TABLE>
<CAPTION>

              NAME                  AGE                  POSITION
              ----                  ---                  ---------
<S>                                  <C>                  <C>
         Carl M. Bosch               44         Vice President, Instrument Development

         David C. Bupp               50         President, Chief Executive Officer and Director

         Brent L. Larson             36         Vice President, Finance and Chief Financial Officer
</TABLE>


Carl M. Bosch has served as Vice President, Instrument Development since March
2000. Mr. Bosch served as Director, Instrument Development from May 1998 to
March 2000. Prior to joining Neoprobe, Mr. Bosch was employed by GE Medical
Systems from 1994 to 1998 where he served as Manager, Nuclear Programs. From
1977 to 1994, Mr. Bosch was employed by GE Aerospace in several engineering and
management functions. Mr. Bosch has a B.S. degree in Electrical Engineering from
the University of Pennsylvania and a M.S. degree in Systems Engineering from
Lehigh University.

David C. Bupp has served as President and a director of the Company since August
1992 and as Chief Executive Officer since February 1998. From August 1992 until
February 1998, Mr. Bupp serve as Chief Operating Officer of the Company. From
August 1992 to May 1993, Mr. Bupp served as Treasurer of the Company. In
addition to the foregoing positions, from December 1991 to August 1992, he was
Acting President, Executive Vice President, Chief Operating Officer and Finance
and Chief Financial Officer. From 1982 to December 1989, Mr. Bupp was Senior
Vice President, Regional Manager for AmeriTrust Company National Association, a
nationally chartered bank holding company, where he was in charge of commercial
banking operations throughout Central Ohio. Mr. Bupp has a B.A. degree in
Economics from Ohio Wesleyan University. Mr. Bupp completed a course of study at
Stonier Graduate School of Banking.

Brent L. Larson has served as Vice President, Finance and Chief Financial
Officer since February 1999, as Vice President, Finance from July 1998 to
January 1999 and as Controller from July 1996 to June 1998. Prior to joining
Neoprobe, Mr. Larson was employed by Price Waterhouse LLP. Mr. Larson has a
B.B.A. degree in accounting from Iowa State University of Science and Technology
and is a Certified Public Accountant.

                                       31

<PAGE>   32
SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE.

The Registrant does not know of any failure to make filings required by Section
16 on a timely basis by any of its directors, executive officers or beneficial
owners of 10% or more of its equity securities.

ITEM 11. EXECUTIVE COMPENSATION.

SUMMARY COMPENSATION TABLE

The following table sets forth certain information concerning the annual and
long-term compensation of the chief executive officer of the Company and the
Company's three other executive officers having annual compensation in excess of
$100,000 during the last fiscal year (the "Named Executives") for the Company's
last three fiscal years.

<TABLE>
<CAPTION>

                                                                          LONG TERM
                                                                          COMPENSATION
                                                                          AWARDS


                                                                                         SECURITIES
                                                                            RESTRICTED   UNDERLYING
                                                     ANNUAL COMPENSATION   STOCK AWARDS    OPTIONS       ALL OTHER
      NAME AND PRINCIPAL POSITION         YEAR       SALARY        BONUS       ($)          (#)        COMPENSATION
      ---------------------------         ----       ------        -----       ---          ----       ------------
<S>                                        <C>         <C>        <C>          <C>            <C>          <C>
David C. Bupp,                            1999      $306,731     $58,000    $21,875 (a)           0       $1,600 (b)
 President and Chief                      1998       297,222           0    270,000 (a)      30,000        1,600 (b)
 Executive Officer                        1997       248,115           0          0          25,600        1,600 (b)

Matthew F. Bowman,                        1999      $232,389     $10,259    $12,500 (c)      30,000       $1,600 (b)
 Senior Vice President,                   1998       204,690           0     27,250 (c)     136,900        1,600 (b)
 Marketing and Operations                 1997       161,163      28,000          0           7,200        1,600 (b)

                                          1999      $109,375     $23,104     $6,250 (d)      25,000       $1,325 (b)
Brent L. Larson, Vice President, Finance  1998        83,385           0     13,760 (d)      32,200          888 (b)
  and Chief Financial Officer             1997        70,065       5,368          0           7,500          787 (b)

Patricia A. Coburn,                       1999      $118,167     $19,604          0          20,000     $106,600 (g)
 Vice President,                          1998       127,662           0    $13,760  (f)     33,400        1,421 (b)
 General Counsel(e)                       1997       117,832      14,394          0           8,400          588 (b)

</TABLE>

(a)      The aggregate number of Mr. Bupp's restricted stock holdings at
         December 31, 1999 was 110,000 shares with an aggregate value of
         $48,125. Mr. Bupp has the right to receive dividends other than
         dividends on or distributions of shares of any class of stock issued by
         Neoprobe which dividends or distributions will be delivered to Neoprobe
         under the same restrictions on transfer and possibility of forfeitures
         as the shares of Restricted Stock from which they derive.

(b)      Amounts of matching contribution under the Company's 401(k) Plan.
         Eligible employees may make voluntary contributions and the Company
         may, but is not obligated to, make matching contributions based on 20
         percent of the employee's contribution, up to five percent of the
         employee's salary. Contributions by employees are invested by an
         independent plan administrator in mutual funds and contributions, if
         any, by the Company are made in the form of shares of Common Stock. The
         401(k) Plan is intended to qualify under section 401 of the Code, which
         provides that employee and Company contributions and income earned on
         contributions are not taxable to the employee until withdrawn from the
         plan, and that Company contributions will be deductible by the Company
         when made.

(c)      The aggregate number of Mr. Bowman's restricted stock holdings at
         December 31, 1999 was 60,000 shares with an aggregate value of $26,250
         Mr. Bowman has the right to receive dividends other than dividends on
         or distributions of shares of any class of stock issued by Neoprobe
         which dividends or distributions will be delivered to Neoprobe under
         the same restrictions on transfer and possibility of forfeitures as the
         shares of Restricted Stock from which they derive.

(d)      The aggregate number of Mr. Larson's restricted stock holdings at
         December 31, 1999 was 30,000 shares with an aggregate value of $13,125.
         Mr. Larson has the right to receive dividends other than dividends on
         or distributions of shares of any class of stock issued by Neoprobe
         which dividends or distributions will be delivered to Neoprobe under
         the same restrictions on transfer and possibility of forfeitures as the
         shares of Restricted Stock from which they derive.


                                       32

<PAGE>   33


(e)      Ms. Coburn began her employment with the Company in August, 1996, and
         ended her employment with the Company in November, 1999.

(f)      The aggregate number of Ms. Coburn's restricted stock holdings at
         December 31, 1999 was 20,000 shares with an aggregate value of $ 8,750.
         Ms. Coburn has the right to receive dividends other than dividends on
         or distributions of shares of any class of stock issued by Neoprobe
         which dividends or distributions will be delivered to Neoprobe under
         the same restrictions on transfer and possibility of forfeitures as the
         shares of Restricted Stock from which they derive.

(g)      This amount includes payments to Ms. Coburn relating to her separation
         from the Company of $105,000 for severance; see "Compensation of
         Management-Departure of Named Executives." The remaining $1,600 was a
         matching contribution to Ms. Coburn's 401(k) account; see footnote (b)
         to this table.

OPTION GRANTS IN LAST FISCAL YEAR
- ---------------------------------

The following table presents certain information concerning stock options
granted to the Named Executives during the last fiscal year (1999).


<TABLE>
<CAPTION>

                                                  INDIVIDUAL GRANTS                                     GRANT DATE VALUE
- ----------------------------------------------------------------------------------------------------    ----------------
<S>                                <C>                   <C>                 <C>             <C>              <C>
                                                      PERCENT OF TOTAL
                              NUMBER OF SECURITIES    OPTIONS GRANTED
                              UNDERLYING OPTIONS      TO EMPLOYEES IN     EXERCISE PRICE   EXPIRATION       GRANT DATE
NAME                          GRANTED (SHARES)        FISCAL YEAR         PER SHARE           DATE       PRESENT VALUE $
- ----                          ---------------         -----------         ---------           ----       ---------------

David C. Bupp                           0                 0%                n/a               n/a              n/a

Matthew F. Bowman                  30,000(a)            5.5 %             $1.25           02/11/09 (b)       $1.00 (c)

Brent L. Larson                    25,000(a)            4.6 %             $1.25           02/11/09 (b)       $1.00 (c)

Patricia A. Coburn                 20,000(d)            3.7 %             $1.25           02/11/09 (b)       $1.00 (c)

</TABLE>

(a)      Vests as to one-third of these shares on each of the first three
         anniversaries of the date of grant.

(b)      The per share weighted average fair value of these stock options during
         1999 was $1.00 on the date of grant using the Black Scholes option
         pricing model with the following assumptions: an expected life of 4
         years, an average risk-free interest rate of 4.83%, volatility of 123%
         and no expected dividend rate.

(c)      The options terminate on the earlier of the Expiration Date, nine
         months after death or disability, 90 days after termination of
         employment without cause or by resignation or immediately upon
         termination of employment for cause.

(d)      Ms. Coburn resigned effective November 30, 1999 and these options were
         canceled without vesting.

FISCAL YEAR END OPTION NUMBERS AND VALUES
- -----------------------------------------

The following table sets forth certain information concerning the number and
value of unexercised options held by the Named Executives at the end of the last
fiscal year (December 31, 1999).

<TABLE>
<CAPTION>
<S>                                          <C>                               <C>

                                    NUMBER OF SECURITIES               VALUE OF UNEXERCISED
                                   UNDERLYING UNEXERCISED              IN-THE-MONEY OPTIONS
                                 OPTIONS AT FISCAL YEAR-END:            AT FISCAL YEAR-END:
           NAME                   EXERCISABLE/UNEXERCISABLE          EXERCISABLE/UNEXERCISABLE
           ----                  --------------------------          -------------------------

David C. Bupp                          329,567/131,033                         0 / 0

Matthew F. Bowman                       98,752/115,348                         0 / 0

Brent L. Larson                          19,901/44,799                         0 / 0

Patricia A. Coburn                            29,370/0                         0 / 0

</TABLE>


                                       33


<PAGE>   34



LONG-TERM INCENTIVE PLANS-AWARDS IN LAST FISCAL YEAR
- ----------------------------------------------------

 The following table sets forth certain information concerning restricted stock
 awards to Named Executives during fiscal year 1999.


<TABLE>
<CAPTION>

                                                   Number of Shares                Performance or Other
                                                    Units or Other                Period Until Maturation
  Name                                                  Rights                           or Payout
 -----------------------------------------      -------------------------       ------------------------------
<S>                                                      <C>                                <C>

  David C. Bupp (a)                                     35,000                           04/30/09

  Matthew F. Bowman (a)                                 20,000                           04/30/09

  Brent L. Larson (a)                                   10,000                           04/30/09

  Patricia A. Coburn                                         0                               n/a

</TABLE>


 (a)     These awards are shares of restricted stock which the grantees
         purchases for $.001 per share. Grantees may not transfer or sell their
         shares unless and until such shares vest. Each grantee forfeits his
         unvested shares on the earliest of the termination of his employment
         for any reason unless the Company is, at the time of termination for
         death or disability, actively engaged in negotiations that could
         reasonably be expected to lead to a change in control of the Company or
         the tenth anniversary of the date of grant. The restricted shares that
         have not been previously forfeited will vest if and when there is a
         change in control of the Company. Except for these restrictions on
         transfer and possibilities of forfeiture, the grantees have all other
         rights with respect to their restricted shares, including the right to
         vote such shares and receive cash dividends.

COMPENSATION OF MR. BUPP
- ------------------------

Employment Agreement. David C. Bupp is employed under a one-year employment
agreement effective July 1, 1999. The employment agreement provides for an
annual base salary of $290,000.

The Compensation Committee of the Board of Directors will, on an annual basis,
review the performance of the Company and of Mr. Bupp and will pay a bonus to
Mr. Bupp as it deems appropriate, in its discretion. Such review and bonus will
be consistent with any bonus plan adopted by the Compensation Committee which
covers the executive officers of the Company generally. The Company paid a
$58,000 bonus to Mr. Bupp relating to fiscal year 1999.

If a change in control occurs with respect to the Company and the employment of
Mr. Bupp is concurrently or subsequently terminated (i) without cause (cause is
defined as any willful breach of a material duty by Bupp in the course of his
employment or willful and continued neglect of his duty as an employee), (ii)
the term of Mr. Bupp's employment agreement expires or (iii) Mr. Bupp resigns
because his authority, responsibilities or compensation have materially
diminished, a material change occurs in his working conditions or the Company
breaches the agreement, Mr. Bupp will be paid a severance payment equal to twice
his annual base salary (less amounts paid as Mr. Bupp's salary and benefits that
continue for the remaining term of the agreement if his employment is terminated
without cause). A change in control includes (a) the acquisition, directly or
indirectly, by a person (other than the Company or an employee benefit plan
established by the Board of Directors) of beneficial ownership of 15 percent or
more of the Company's securities with voting power in the next meeting of
holders of voting securities to elect the Directors; (b) a majority of the
Directors elected at any meeting of the holders of the Company's voting
securities are persons who were not nominated by the Company's then current
Board of Directors or an authorized committee thereof; (c) the stockholders of
the Company approve a merger or consolidation of the Company with another
person, other than a merger or consolidation in which the holders of the
Company's voting securities outstanding immediately before such merger or
consolidation continue to hold voting securities in the surviving or resulting
corporation (in the same relative proportions to each other as existed before
such event) comprising eighty percent (80%) or more of the voting power for all
purposes of the surviving or resulting corporation; or (d) the stockholders of
the Company approve a transfer of substantially all of the assets of the Company
to another person other than a transfer to a transferee, eighty percent (80%) or
more of the voting power of which is owned or controlled by the Company or by
the holders of the Company's voting securities outstanding immediately before



                                       34


<PAGE>   35


such transfer in the same relative proportions to each other as existed before
such event. Mr. Bupp waived his rights to claim that the issuance of securities
described under the heading "Approval of Issuance of Securities" was a "change
in control."

Mr. Bupp's compensation will continue for the full term of the agreement if his
employment is terminated without cause.

Restricted Stock. On April 30, 1999, the Company and Mr. Bupp entered into a
restricted stock purchase agreement under which Mr. Bupp purchased 35,000 shares
of Common Stock for a purchase price of $0.001 per share. Mr. Bupp may not
transfer or sell any of the restricted shares unless and until they vest. Mr.
Bupp will forfeit any portion of the restricted shares that has not vested (and
the Company will refund the purchase price paid) on the earlier of the date of
the termination of his employment under his employment agreement with the
Company for any reason unless the Company is, at the time of termination for
death or disability, actively engaged in negotiations that could reasonably be
expected to lead to a change in control, and April 30, 2009. Restricted shares
that have not previously been forfeited will vest if and when there is a change
in control of the Company. Except for these restrictions on transfer and
possibilities of forfeiture, Mr. Bupp has all other rights with respect to the
restricted shares, including the right to vote such shares and receive cash
dividends.

The term "change in control" has the same meaning under Mr. Bupp's restricted
stock agreement as it does under Mr. Bupp's employment agreement; see the
definition of "change in control" under the heading "Compensation of Mr. Bupp;
Employment Agreement."

The Company has not recognized any expense under the restricted stock agreement
due to the contingent nature of the vesting provisions and the risk of
forfeiture.

COMPENSATION OF NON-EMPLOYEE DIRECTORS
- --------------------------------------

Non-employee Directors who are not affiliated with a principal stockholder of
the Company elected to receive options to purchase common stock in lieu of cash
compensation for service during 1999. The Chairman received 30,000 options and
other non-employee Directors received 15,000 options each in lieu of cash
compensation. The Company reimbursed non-employee Directors for travel expenses
for meetings attended during 1999. In addition, each non-employee Director
received 15,000 options to purchase common stock as a part of the Company's
annual stock incentive grants. Options granted to purchase common stock vest
either on a monthly or annual basis over a three-year period and have an
exercise price equal to no less than the market price of common stock at the
date of grant.

Directors who are also officers or employees of the Company do not receive any
compensation for their services as Directors.

COMPENSATION AGREEMENTS WITH OTHER NAMED EXECUTIVE OFFICERS
- -----------------------------------------------------------

Severance Agreements. Pursuant to a Change in Control Severance Agreement dated
October 23, 1998 between the Company and Brent L. Larson, in the event of a
change in control of the Company and the termination of Mr. Larson's employment
with the Company within 4 months thereafter by the Company without cause or by
Mr. Larson's resignation, Mr. Larson would receive (i) one and one-half times
his salary as severance and (ii) the right to participate in the Company's life
and health insurance programs for 18 months.

Matthew F. Bowman and Patricia A. Coburn were parties to Change in Control
Severance Agreements with the Company dated October 23, 1998 and containing
terms similar to those contained in Mr. Larson's Change in Control Severance
Agreement discussed above. Ms. Coburn received $105,000 in 1999 related to her


                                       35


<PAGE>   36


resignation. Mr. Bowman will receive $200,417 in 2000 related to his
resignation. Both Ms. Coburn and Mr. Bowman are entitled to receive additional
payments in the event a qualifying change in control transaction occurs within
certain timeframes from the effective dates of their resignations as defined in
their agreements.

The term "change in control" has the same meaning under this heading as it does
under Mr. Bupp's employment agreement except that the change in beneficial
ownership is defined at 30% as compared to 15% in Mr. Bupp's agreement; see the
definition of "change in control" under the heading "Compensation of Mr. Bupp;
Employment Agreement."

Restricted Stock. On April 30, 1999, the Company and Mr. Larson entered into a
restricted stock purchase agreement under which Mr. Larson purchased 10,000
shares of common stock for a purchase price of $0.001 per share. Mr. Larson may
not transfer or sell any of the restricted shares unless and until they vest.
Mr. Larson will forfeit any portion of the restricted shares that has not vested
(and the Company will refund the purchase price paid) on the earlier of the date
of the termination of his employment under his employment agreement with the
Company for any reason unless the Company is, at the time of termination for
death or disability, actively engaged in negotiations that could reasonably be
expected to lead to a change in control, and April 30, 2009. Restricted shares
that have not previously been forfeited will vest if and when there is a change
in control of the Company. Except for these restrictions on transfer and
possibilities of forfeiture, Mr. Larson has all other rights with respect to the
restricted shares, including the right to vote such shares and receive cash
dividends.

On April 30, 1999, the Company and Mr. Bowman entered into a restricted stock
purchase agreement under which Mr. Bowman purchased 20,000 shares of common
stock for a purchase price of $0.001 per share. The terms of Mr. Bowman's
restricted stock purchase agreement are identical to those contained in Mr.
Larson's restricted stock purchase agreement discussed above regarding vesting,
forfeiture and rights of ownership. On March 2, 2000, the date of his
resignation, Mr. Bowman owned a total of 60,000 restricted shares (including the
20,000 issued on April 30, 1999) on terms similar to those discussed above. As
of March 30, 2000, these shares have neither vested nor been forfeited under the
terms of Mr. Bowman's Agreement, Release and Waiver.

On November 30, 1999, the date of her resignation, Ms. Coburn owned 20,000
restricted shares on terms similar to those discussed above regarding Mr.
Bowman's and Mr. Larson's restricted shares. As of March 30, 2000, these shares
have neither vested nor been forfeited under the terms of Ms. Coburn's Severance
Agreement.



                                       36

<PAGE>   37


ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.
- ------------------------------------------------------------------------

SECURITY OWNERSHIP OF PRINCIPAL STOCKHOLDERS,
DIRECTORS, NOMINEES AND EXECUTIVE OFFICERS

The following table sets forth, as of February 29, 2000, certain information
with respect to the beneficial ownership of shares of Common Stock by (i) each
person known to the Company to be the beneficial owner of more than 5 percent of
the outstanding shares of Common Stock, (ii) each Director or nominee for
Director of the Company, (iii) each of the Named Executives (see "Compensation
of Management--Summary Compensation Table"), and (iv) the Company's Directors
and executive officers as a group.


<TABLE>
<CAPTION>

                                                   NUMBER OF
                                                    SHARES
                                                  BENEFICIALLY         PERCENT
             BENEFICIAL OWNER                       OWNED(*)          OF CLASS
- -------------------------------------------      ---------------     -----------
<S>                                                   <C>               <C>
 Melvin D. Booth                                      11,667(a)          (m)
 Matthew F. Bowman                                   208,526(b)          (m)
 David C. Bupp                                       473,662(c)         1.6 %
 John S. Christie                                     12,367(d)          (m)
 Julius R. Krevans                                    22,267(f)          (m)
 Brent L. Larson                                      69,084(n)          (m)
 Michael P. Moore                                     26,267(g)          (m)
 J. Frank Whitley, Jr.                                16,267(i)          (m)
 James F. Zid                                         28,367(j)          (m)
 All directors and officers as a group               868,329(k)         3.0 %
 (10 persons)
 Patricia A. Coburn                                   22,265(e)          (m)
 Kenneth R. McGuire                                1,567,100(l)         5.4%
 Paramount Capital Asset Management, Inc.          6,000,000(h)         20.7%

</TABLE>


(*)      Unless otherwise indicated, the beneficial owner has sole voting and
         investment power over these shares subject to the spousal rights, if
         any, of the spouses of those beneficial owners who have spouses.

(a)      This amount consists of shares issuable upon exercise of options which
         are exercisable within 60 days, but does not include 58,333 shares
         issuable upon exercise of options which are not exercisable within
         60 days.

(b)      This amount includes 145,837 shares issuable upon exercise of options
         which are exercisable within 60 days and 2,689 shares in Mr. Bowman's
         account in the Neoprobe Corporation 401(k) Plan (the "401(k) Plan"),
         but does not include 68,263 shares issuable upon exercise of options
         which are not exercisable within 60 days.

(c)      This amount includes 345,600 shares issuable upon exercise of options
         which are exercisable within 60 days, 4,362 shares in Mr. Bupp's
         account in the 401(k) Plan and 2,200 shares held by Mr. Bupp's wife and
         daughters, as to which latter shares he disclaims beneficial ownership,
         but it does not include 295,000 shares issuable upon exercise of
         options which are not exercisable within 60 days. Mr. Bupp is one of
         three trustees of the 401(k) Plan and may, as such, share investment
         power over Common Stock held in such plan. The 401(k) Plan holds an
         aggregate total of 47,665 shares of Common Stock. Mr. Bupp disclaims
         any beneficial ownership of shares held by the 401(k) Plan that are not
         allocated to his personal account.

(d)      This amount includes 11,667 shares issuable upon exercise of options
         which are exercisable within 60 days, but does not include 58,833
         shares issuable upon exercise of options which are not exercisable
         within 60 days.

(e)      This amount includes 2,625 shares in Ms. Coburn's account in the 401(k)
         Plan.



                                       37

<PAGE>   38



(f)      This amount includes 20,267 shares issuable upon exercise of options
         which are exercisable within 60 days, but does not include 103,333
         shares issuable upon exercise of options which are not exercisable
         within 60 days.

(g)      This amount includes 20,267 shares issuable upon exercise of options
         which are exercisable within 60 days, but does not include 58,333
         shares issuable upon exercise of options which are not exercisable
         within 60 days.

(h)      The amount consists of 900,000 shares owned by the Aries Domestic Fund,
         L.P. ("Aries Domestic"), 900,000 shares issuable upon the exercise of
         warrants owned by Aries Domestic, 2,100,000 shares owned by The Aries
         Master Fund, a Cayman Island Exempted Company ("Aries Master"), and
         2,100,000 shares issuable upon the exercise of warrants owned by Aries
         Master. Paramount Capital Asset Management, Inc., Delaware corporation
         ("Paramount Capital") has shared voting and dispositive power over the
         shares of Aries Master and Aries Domestic because Paramount Capital is
         the investment manager of Aries Master and the general partner of Aries
         Domestic. Lindsay A. Rosenwald, M.D. ("Dr. Rosenwald") has shared
         voting and dispositive power over the shares of Aries Master and Aries
         Domestic because he in the sole shareholder of Paramount Capital. The
         address of Paramount Capital, Aries Domestic and Dr. Rosenwald is 787
         Seventh Avenue, 48th Floor, New York, New York 10019. The address of
         Aries Master is c/o Mees Peirson (Cayman) Limited, Post Office Box
         2003, American Center, Phase 3, Dr. Roy's Drive, George Town, Grand
         Cayman. The disclosure contained in this footnote is derived from a
         Schedule 13D filed by Paramount Capital, Aries Master, Aries Domestic
         and Dr. Rosenwald with SEC on February 4, 2000.


(i)      This amount includes 15,267 shares issuable upon exercise of options
         which are exercisable within 60 days, but does not include 58,333
         shares issuable upon exercise of options which are not exercisable
         within 60 days.

(j)      This amount includes 22,767 shares issuable upon exercise of options
         which are exercisable within 60 days and 1,600 shares held in Mr. Zid's
         IRA, but does not include 58,333 shares issuable upon exercise of
         options which are not exercisable within 60 days.

(k)      This amount includes 629,806 shares issuable upon exercise of options
         which are exercisable within 60 days and 9,168 shares held in the
         Company's 401(k) Plan. This amount does not include 846,594 shares
         issuable upon the exercise of options which are not exercisable within
         60 days. Certain executive officers of the Company are the trustees of
         the 401(k) Plan and may, as such, share investment power over Common
         Stock held in such plan. Each trustee disclaims any beneficial
         ownership of shares held by the 401(k) Plan that are not allocated to
         his personal account. The 401(k) Plan holds an aggregate total of
         47,665 shares of Common Stock.

(l)      Mr. McGuire's address is 3000 North Clybourn, Hangar 34, Burbank,
         California 91505. This amount includes 17,600 shares held by Mr.
         McGuire as custodian under the Uniform Transfer to Minors Act of
         California for his four children.

(m)      Less than 1 percent.

(n)      This amount includes 36,467 shares issuable upon exercise of options
         which are exercisable within 60 days and 1,972 shares in Mr. Larson's
         account in the 40l(k) Plan, but it does not include 88,333 shares
         issuable upon exercise of options which are not exercisable within 60
         days. Mr. Larson is one of three trustees of the 40l(k) Plan and may,
         as such, share investment power over Common Stock held in such plan.
         The 40l(k) Plan holds an aggregate total of 47,665 shares of Common
         Stock. Mr. Larson disclaims any beneficial ownership of shares held by
         the 40l(k) Plan that are not allocated to his personal account.



                                       38

<PAGE>   39
                                     PART IV
ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.

         (a) LIST OF EXHIBITS AND FINANCIAL STATEMENTS FILED AS PART OF THIS
             REPORT

         (3) ARTICLES OF INCORPORATION AND BY-LAWS

         3.1.     Complete Restated Certificate of Incorporation of Neoprobe
                  Corporation, as corrected February 18, 1994 and as amended
                  June 27, 1994, July 25, 1995, June 3, 1996 and March 17, 1999
                  (incorporated by reference to Exhibit 3.1 to Registrant's
                  annual report on Form 10-K for the year ending December 31,
                  1998; Commission File No. 0-26520 (the "1998 Form 10-K").

         3.2.     Amended and Restated By-Laws, dated July 21, 1993, as amended
                  July 18, 1995 and May 30, 1996 (incorporated by reference to
                  Exhibit 99.4 to the June 1996 Form 8-K).

         (4) INSTRUMENTS DEFINING THE RIGHTS OF HOLDERS, INCLUDING INDENTURES

         4.1.     See Articles FOUR, FIVE, SIX and SEVEN of the Restated
                  Certificate of Incorporation of the Registrant (see Exhibit
                  3.1).

         4.2.     See Articles II and VI and Section 2 of Article III and
                  Section 4 of Article VII of the Amended and Restated By-Laws
                  of the Registrant (see Exhibit 3.2).

         4.3.     Rights Agreement dated as of July 18, 1995 between the
                  Registrant and Continental Stock Transfer & Trust Company
                  (incorporated by reference to Exhibit 1 to the registration
                  statement on Form 8-A, Commission File No. 0-26520).

         4.4.     Amendment Number 1 to the Rights Agreement between the
                  Registrant and Continental Stock Transfer & Trust Company
                  dated February 16, 1999 (incorporated by reference to Exhibit
                  4.4 to the 1998 Form 10-K).

         (10) MATERIAL CONTRACTS (*indicates management contract or compensatory
              plan or arrangement).

         10.1. 1.--10.1.24. Reserved.

         10.1.25. Rights Agreement between the Registrant and Continental Stock
                  Transfer & Trust Company dated as of July 18, 1995 (see
                  Exhibit 4.3).

         10.1.26.--10.1.30. Reserved.

         10.1.31. Amendment Number 1 to the Rights Agreement between the
                  Registrant and Continental Stock Transfer & Trust Company
                  dated February 16, 1999 (see Exhibit 4.4).

         10.1.32. Preferred Stock and Warrant Purchase Agreement dated February
                  16, 1999 among the Registrant, The Aries Master Fund, a Cayman
                  Island exempted company, and The Aries Domestic Fund, L.P.
                  (incorporated by reference to Exhibit 10.1.32 to the 1998 Form
                  10-K).

         10.1.33. Warrant dated February 16, 1999 for the purchase of shares to
                  purchase Common Stock issued to The Aries Master Fund, a
                  Cayman Island exempted company (incorporated by reference to
                  Exhibit 10.1.33 to the 1998 Form 10-K). This exhibit is one of
                  two substantially identical instruments and is accompanied by
                  a schedule identifying the other instrument omitted and
                  setting forth the material details in which such instrument
                  differs from the one filed herewith.

                                       39
<PAGE>   40
         10.1.34. Option Units dated February 16, 1999 for the purchase of
                  shares of 5% Series B Convertible Preferred Stock of the
                  Registrant and warrants to purchase shares of Common Stock
                  issued to Paramount Capital, Inc. (incorporated by reference
                  to Exhibit 10.1.34 to the 1998 Form 10-K).

         10.1.35. Financial Advisory Agreement dated February 16, 1999 between
                  the Registrant and Paramount Capital, Inc. (incorporated by
                  reference to Exhibit 10.1.35 to the 1998 Form 10-K).

         10.1.36. Letter agreement dated February 24, 1999 among the Registrant,
                  The Aries Master Fund, a Cayman Island Exempted Company and
                  The Aries Domestic Fund, L.P. (incorporated by reference to
                  Exhibit 10.1.36 to the 1998 Form 10-K).

         10.1.37. Letter agreement dated March 12, 1999 among the Registrant,
                  The Aries Master Fund, a Cayman Island Exempted Company and
                  The Aries Domestic Fund, L.P. (incorporated by reference to
                  Exhibit 10.1.37 to the 1998 Form 10-K).

         10.1.38. Letter Agreement dated April 1, 1999 among the Registrant, The
                  Aries Master Fund, a Cayman Island Exempted Company, and The
                  Aries Domestic Fund, L.P. (incorporated by reference to
                  Exhibit 10.1.38 to the 1998 Form 10-K).

         10.2.1.--10.2.14. Reserved.

         10.2.15. Option Agreements between the Registrant and David C. Bupp
                  (incorporated by reference to Exhibit 10.7 to the Registrant's
                  registration statement on Form S-1; No. 33-51446 (the "Form
                  S-1")).*

         10.2.16.--10.2.17. Reserved.

         10.2.18. Non-Qualified Stock Option Agreement dated May 3, 1993 between
                  the Registrant and David C. Bupp (incorporated by reference to
                  Exhibit 10.50 to the Registrant's Quarterly Report on Form
                  10--QSB for the quarterly period ended June 30, 1993;
                  Commission File No. 0-26520 (the "2nd Quarter 1993 Form
                  10-QSB")).*

         10.2.19.--10.2.22. Reserved.

         10.2.23. Non-Qualified Stock Option Agreement dated February 28, 1992
                  and amended and restated June 3, 1993 between the Registrant
                  and David C. Bupp (incorporated by reference to Exhibit 99.5
                  to Registrant's report on Form 8-K dated January 21, 1994;
                  Commission File No. 0-26520 (the "January 1994 Form 8-K")).*

         10.2.24. Non-Qualified Stock Option Agreement dated July 1, 1990 and
                  amended and restated June 3, 1993 between the Registrant and
                  David C. Bupp (incorporated by reference to Exhibit 99.6 to
                  the January 1994 Form 8-K).*

         10.2.25. Non-Qualified Stock Option Agreement dated June 1, 1992 and
                  amended and restated June 3, 1993 between the Registrant and
                  John L. Ridihalgh (incorporated by reference to Exhibit 99.7
                  to the January 1994 Form 8-K).*

         10.2.26. Amended and Restated Stock Option and Restricted Stock
                  Purchase Plan dated March 3, 1994 (incorporated by reference
                  to Exhibit 10.2.26 to Registrant's annual report on Form
                  10-KSB for the year ending December 31, 1993; Commission File
                  No. 0-26520 (the "1993 Form 10-KSB")).*

         10.2.27.--10.2.28. Reserved.


                                       40
<PAGE>   41
         10.2.29. Non-Qualified Stock Option Agreement dated February 16, 1995
                  between the Registrant and John L. Ridihalgh (incorporated by
                  reference to Exhibit 10.2.29 to the 1994 Form 10-KSB).*

         10.2.30. Non-Qualified Stock Option Agreement dated February 16, 1995
                  between the Registrant and David C. Bupp (incorporated by
                  reference to Exhibit 10.2.30 to the 1994 Form 10-KSB).*

         10.2.31.--10.2.33. Reserved.

         10.2.34. Restricted Stock Purchase Agreement dated June 5, 1996 between
                  the Registrant and John L. Ridihalgh (incorporated by
                  reference to Exhibit 10.2.32 to the Registrant's Annual Report
                  on Form 10-KSB for the year ending December 31, 1997 (the
                  "1997 Form 10-KSB"); Commission File No. 0-26520).*

         10.2.35. Restricted Stock Purchase Agreement dated June 5, 1996 between
                  the Registrant and David C. Bupp (incorporated by reference to
                  Exhibit 10.2.35 to the 1997 Form 10-KSB).*

         10.2.36. Reserved.

         10.2.37. 1996 Stock Incentive Plan dated January 18, 1996 as amended
                  March 13, 1997 (incorporated by reference to Exhibit 10.2.37
                  to the 1997 Form 10-K).*

         10.2.38. Reserved.

         10.2.39. Non-Qualified Stock Option Agreement dated January 18, 1996
                  between the Registrant and David C. Bupp (incorporated by
                  reference to Exhibit 10.2.39 to the 1997 Form 10-K).*

         10.2.40. Reserved.

         10.2.41. Non-Qualified Stock Option Agreement dated February 3, 1997
                  between the Registrant and David C. Bupp (incorporated by
                  reference to Exhibit 10.2.41 to the 1997 Form 10-K).*

         10.2.42. Reserved.

         10.2.43. Agreement, Release, and Waiver dated February 23, 1998 between
                  the Registrant and Dr. William Eisenhardt (incorporated by
                  reference to the Registrant's quarterly report on Form 10-Q
                  for the quarter ending March 31, 1998; Commission File No.
                  0-26520).*

         10.2.44. Employment Agreement dated as of January 1, 1998 between the
                  Registrant and David C. Bupp. (incorporated by reference to
                  Exhibit 10.2.44 of the Registrant's Quarterly Report on Form
                  10-Q for the quarterly period ended June 30, 1998; Commission
                  File No. 0-26520 (the "2nd Quarter 1998 Form 10-Q")).*

         10.2.45. Restricted Stock Purchase Agreement between David C. Bupp and
                  the Registrant dated May 20, 1998 (incorporated by reference
                  Exhibit 10.2.45 to the 2nd Quarter 1998 Form 10-Q).*

         10.2.46. Waiver by David Bupp dated February 16, 1999 of certain
                  provisions in the employment agreement between the Registrant
                  and David C. Bupp dated January 1, 1998 (incorporated by
                  reference to Exhibit 10.2.46 to the 1998 Form 10-K).*

         10.2.47. Severance Agreement dated October 23, 1998 between the
                  Registrant and Matthew F. Bowman (incorporated by reference to
                  Exhibit 10.2.47 to the 1998 Form 10-K). This agreement is one
                  of three substantially identical agreements and is accompanied
                  by a schedule identifying the other agreements omitted and
                  setting forth the material details in which such documents
                  differ from the one that is filed herewith.*


                                       41
<PAGE>   42
         10.2.48. Restricted Stock Agreement dated October 23, 1998 between the
                  Registrant and Matthew F. Bowman (incorporated by reference to
                  Exhibit 10.2.48 to the 1998 Form 10-K). This agreement is one
                  of three substantially identical agreements and is accompanied
                  by a schedule identifying the other agreements omitted and
                  setting forth the material details in which such documents
                  differ from the one that is filed herewith.*

         10.2.49. Separation Agreement dated October 21, 1998 between the
                  Registrant and John L. Ridihalgh (incorporated by reference to
                  Exhibit 10.2.49 to the 1998 Form 10-K).*

         10.2.50. Restricted Stock Agreement dated April 30, 1999 between the
                  Registrant and David C. Bupp (incorporated by reference to
                  Exhibit 10.2.50 to the Registrant's Quarterly Report on Form
                  10-Q for the quarterly period ended June 30, 1999; Commission
                  File No. 0-26520). This Agreement is one of three
                  substantially identical agreements and is accompanied by a
                  schedule identifying the other agreements omitted and setting
                  forth the material details in which such agreements differ
                  from the one that is filed herewith.*

         10.2.51. Employment Agreement between the Registrant and David C. Bupp
                  dated July 1, 1999 (incorporated by reference to Exhibit
                  10.2.51 to the Registrant's Quarterly Report on Form 10-Q for
                  the quarterly period ended September 30, 1999; Commission File
                  No. 0-26520 (the "3rd Quarter 1999 Form 10-Q").*

         10.2.52. Severance Agreement dated November 30, 1999 between the
                  Registrant and Patricia Coburn.*

         10.3.1.  Technology Transfer Agreement dated July 29, 1992 between the
                  Registrant and The Dow Chemical Corporation (incorporated by
                  reference to Exhibit 10.10 to the Form S-1, confidential
                  portions of which were omitted and filed separately with the
                  Commission subject to an order granting confidential
                  treatment).

         10.3.2.--10.3.29. Reserved.

         10.3.30. Facility Agreement dated July 17, 1995 among Registrant,
                  Neoprobe (Israel) Ltd., and Rotem Industries, Ltd.
                  (incorporated by reference to Exhibit 10.3.30 to Registrant's
                  Quarterly Report on Form 10-QSB for the quarter ending
                  September 30, 1995, Commission File No. 0-26520 (the "3rd
                  Quarter 1995 Form 10-QSB"), confidential portions of which
                  were omitted and filed separately with the Commission subject
                  to an order granting confidential treatment).

         10.3.31. Cooperative Research and Development Agreement between
                  Registrant and National Cancer Institute (incorporated by
                  reference to Exhibit 10.3.31 to the 3rd Quarter 1995 Form
                  10-QSB).

         10.3.32. First Amendment to Facility Agreement dated July 17, 1995
                  among Registrant, Neoprobe (Israel), Ltd. and Rotem
                  Industries, Ltd (incorporated by reference to Exhibit 10.3.32
                  to the Registrant's Annual Report on Form 10-KSB for the year
                  ending December 31, 1995; Commission File No. 0-26520 (the
                  "1995 Form 10-KSB")).

         10.3.33.--10.3.34. Reserved.

         10.3.35. Investors' Rights Agreement dated February 5, 1996 between
                  Registrant and XTL Biopharmaceuticals, Ltd. (incorporated by
                  reference to Exhibit 10.3.35 to the 1st Quarter 1996 Form
                  10-QSB).

         10.3.36. Reserved.

         10.3.37  Research and Development Agreement dated February 13, 1996
                  between Registrant and XTL Biopharmaceuticals, Ltd.
                  (incorporated by reference to Exhibit 10.3.37 to the 1st
                  Quarter 1996


                                       42
<PAGE>   43

                  Form 10-QSB, confidential portions of which were omitted and
                  filed separately with the Commission subject to an order
                  granting confidential treatment).

         10.3.38  Sublicense Agreement dated February 13, 1996 between
                  Registrant and XTL Biopharmaceuticals, Ltd. (incorporated by
                  reference to Exhibit 10.3.38 to the 1st Quarter 1996 Form
                  10-QSB, confidential portions of which were omitted and filed
                  separately with the Commission subject to an order granting
                  confidential treatment).

         10.3.39.--10.3.44. Reserved.

         10.3.45  License dated May 1, 1996 between Registrant and The Dow
                  Chemical Company (incorporated by reference to Exhibit 10.3.45
                  to the 2nd Quarter 1996 Form 10-QSB).

         10.3.46  License Agreement dated May 1, 1996 between Registrant and The
                  Dow Chemical Company (incorporated by reference to Exhibit
                  10.3.46 to the 2nd Quarter 1996 Form 10-QSB, confidential
                  portions of which were omitted and filed separately with the
                  Commission subject to an order granting confidential
                  treatment).

         10.3.47. License and Option Agreement between Cira Technologies, Inc.
                  and Neoprobe Corporation dated April 1, 1998 (incorporated by
                  reference to Exhibit 10.3.47 to the 2nd Quarter 1998 Form
                  10-Q).

         10.3.48. Restated Subscription and Option Agreement between the
                  Registrant, Cira Technologies, Inc., Richard G. Olsen, John L.
                  Ridihalgh, Richard McMorrow, James R. Blakeslee, Mueller &
                  Smith, Ltd., Pierre Triozzi and Gregory Noll, dated April 17,
                  1998 (incorporated by reference to Exhibit 10.3.48 to the 2nd
                  Quarter 1998 Form 10-Q).

         10.3.49. Restated Stockholders Agreement with the Registrant, Cira
                  Technologies, Inc., Richard G. Olsen, John L. Ridihalgh,
                  Richard McMorrow, James R. Blakeslee, Mueller & Smith, Ltd.,
                  Pierre L. Triozzi and Gregory Noll, dated April 17, 1998
                  (incorporated by reference to Exhibit 10.3.49 to the 2nd
                  Quarter 1998 Form 10-Q).

         10.4.1.--10.4.15. Reserved.

         10.4.16. Project Management Agreement dated May 17, 1995 between
                  Neoprobe (Israel) Ltd. and BARAN Project Construction Ltd.
                  (incorporated by reference to Exhibit 10.4.16 to the 2nd
                  Quarter 1995 Form 10-QSB).

         10.4.17--10.4.21. Reserved.

         10.4.22. Sales and Marketing Agreement dated April 21, 1998 between the
                  Registrant and Ethicon Endo-Surgery, Inc., an Ohio corporation
                  (incorporated by reference to Exhibit 10.4.22 to the 2nd
                  Quarter 1998 Form 10-Q, confidential portions of which were
                  omitted and filed separately with the Commission subject to an
                  order granting confidential treatment).

         10.4.23. Loan Agreement between the Registrant and Bank One, NA, dated
                  April 16, 1998 (incorporated by reference to Exhibit 10.4.23
                  to the 2nd Quarter 1998 Form 10-Q).

         10.4.24. Variable Rate Cognovit Promissory Note, dated April 16, 1998,
                  issued by Registrant to Bank One, NA (incorporated by
                  reference to Exhibit 10.4.24 to the 2nd Quarter 1998 Form
                  10-Q).

         10.4.25. Security Agreement between the Registrant and Bank One, NA,
                  dated April 16, 1998 (incorporated by reference to Exhibit
                  10.4.25 to the 2nd Quarter 1998 Form 10-Q).


                                       43
<PAGE>   44
         10.4.26. Letter amendment dated October 14, 1998 to the Sales and
                  Marketing Agreement dated April 21, 1998 between the
                  Registrant and Ethicon Endo-Surgery, Inc., an Ohio corporation
                  (incorporated by reference to Exhibit 10.4.26 to the
                  Registrant's quarterly report on Form 10-Q for the quarter
                  ending September 30, 1998, confidential portions of which were
                  omitted and filed separately with the Commission subject to an
                  order granting confidential treatment; Commission File No.
                  0-26520 (the "3rd Quarter 1998 Form 10-Q")).

         10.4.27. Promissory Note, dated September 25, 1998, issued by
                  Registrant to Bank One, NA (incorporated by reference to
                  Exhibit 10.4.27 to the 3rd Quarter 1998 Form 10-Q).

         10.4.28. Addendum to Promissory Note dated September 25, 1998 issued by
                  Registrant to Bank One, NA (incorporated by reference to
                  Exhibit 10.4.28 to the 3rd Quarter 1998 Form 10-Q).

         10.4.29. Covenant Agreement dated September 25, 1998 between the
                  Registrant and Bank One, NA (incorporated by reference to
                  Exhibit 10.4.29 to the 3rd Quarter 1998 Form 10-Q).

         10.4.30. Assignment of Deposit Account dated September 25, 1998 between
                  Registrant and Bank One, NA (incorporated by reference to
                  Exhibit 10.4.30 to the 3rd Quarter 1998 Form 10-Q).

         10.4.31. Asset Purchase Agreement dated October 14, 1998 between the
                  Registrant, Neoprobe AB, a corporation organized and existing
                  under the laws of Sweden, and Bioinvent Production AB, a
                  corporation organized and existing under the laws of Sweden
                  (incorporated by reference to Exhibit 10.4.31 to the 3rd
                  Quarter 1998 Form 10-Q).

         10.4.32. Supply Agreement between the Registrant and eV Products dated
                  December 8, 1997 (incorporated by reference to Exhibit 10.4.32
                  to Amendment 2 to the 1998 Form 10-K/A, confidential portions
                  of which were omitted and filed separately with the Commission
                  subject to an order granting confidential treatment).

         10.4.33. Sales and Marketing Agreement dated February 1, 1999 between
                  the Registrant and KOL Bio Medical Instruments, Inc.
                  (incorporated by reference to Exhibit 10.4.33 to the
                  Registrant's Quarterly Report on Form 10-Q for the quarterly
                  period ended March 31, 1999, confidential portions of which
                  were omitted and filed separately with the Commission subject
                  to an order granting confidential treatment; Commission File
                  No. 0-26520)

         10.4.34. Revolving Credit Note between the Registrant and The Provident
                  Bank dated August 31, 1999 (incorporated by reference to
                  Exhibit 10.4.34 to the 3rd Quarter 1999 Form 10-Q).

         10.4.35. Tennessee Revolving Credit Agreement between the Registrant
                  and The Provident Bank dated August 31, 1999 (incorporated by
                  reference to Exhibit 10.4.35 to the 3rd Quarter 1999 Form
                  10-Q).

         10.4.36. Security Agreement between the Registrant and The Provident
                  Bank dated August 31, 1999 (incorporated by reference to
                  Exhibit 10.4.36 to the 3rd Quarter 1999 Form 10-Q).

         10.4.37. Termination Agreement between the Registrant and Kol
                  Bio-Medical Instruments, Inc. dated October 1, 1999
                  (incorporated by reference to Exhibit 10.4.37 to the 3rd
                  Quarter 1999 Form 10-Q, confidential portions of which were
                  omitted and filed separately with the Commission subject to an
                  order granting confidential treatment).

         10.4.38. Amendment to Termination Agreement between the Registrant and
                  Kol Bio-Medical Instruments, Inc. dated October 1, 1999
                  (incorporated by reference to Exhibit 10.4.38 to the 3rd
                  Quarter 1999 Form 10-Q, confidential portions of which were
                  omitted and filed separately with the Commission subject to an
                  order granting confidential treatment).


                                       44
<PAGE>   45
         10.4.39. Distribution Agreement between the Registrant and Ethicon
                  Endo-Surgery, Inc. dated October 1, 1999 (incorporated by
                  reference to Exhibit 10.4.39 to the 3rd Quarter 1999 Form
                  10-Q, confidential portions of which were omitted and filed
                  separately with the Commission subject to an order granting
                  confidential treatment).

         10.4.40. Amended and Restated Revolving Credit Note between the
                  Registrant and The Provident Bank dated December 31, 1999.

         10.4.41. Tennessee Revolving Credit Note between the Registrant and The
                  Provident Bank dated December 31, 1999.

         10.4.42  Amended and Restated Security Agreement between the Registrant
                  and The Provident Bank dated December 31, 1999.

         10.4.43  Amendment No. 1 to Amended and Restated Revolving Credit Note
                  Dated March 2, 2000.

         10.4.44  Amendment No. 1 to Tennessee Revolving Credit Note dated as of
                  March 2, 2000.

           (11)   STATEMENT REGARDING COMPUTATION OF PER SHARE EARNINGS.

                  11.1.   Computation of Net Loss Per Share.

           (21)   SUBSIDIARIES OF THE REGISTRANT.

                  21.1.   Subsidiaries of the Registrant.

           (23)   CONSENT OF EXPERTS AND COUNSEL.23.1

                  23.1    Consent of PricewaterhouseCoopers LLP

                  23.2    Consent of KPMG LLP

           (24)   POWERS OF ATTORNEY.

                  24.1.    Powers of Attorney.

                  24.2.    Certified resolution of the Registrant's Board of
                           Directors authorizing officers and directors signing
                           on behalf of the Company to sign pursuant to a power
                           of attorney.

         (b) REPORTS ON FORM 8-K.

         No current report on Form 8-K was filed by the Registrant during the
fourth quarter of fiscal 1999.



                                       45

<PAGE>   46
                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

Dated: March 30, 2000
                                        NEOPROBE CORPORATION
                                        (the "Registrant")



                                        By: /s/ David C. Bupp
                                           -------------------------------------
                                            David C. Bupp, President and
                                            Chief Executive Officer


         Pursuant to the requirements of the Exchange Act of 1934, this report
has been signed below by the following persons on behalf of the Registrant and
in the capacities and on the dates indicated.

<TABLE>
<CAPTION>
              SIGNATURE                                       TITLE                                      DATE

<S>                                                 <C>                                             <C>
/s/David C. Bupp                                    Director, President and Chief                   March 30, 2000
- --------------------------------------              Executive Officer
           David C. Bupp                            (principal executive officer)



/s/Brent L. Larson*                                 Vice President,  Finance and Chief              March 30, 2000
- --------------------------------------              Financial Officer
           Brent L. Larson                          Administration
                                                    (principal financial officer)

/s/Melvin D. Booth*                                 Director                                        March 30, 2000
- --------------------------------------
           Melvin D. Booth

/s/John S. Christie*                                Director                                        March 30, 2000
- --------------------------------------
          John S. Christie

/s/Julius R. Krevans*                               Chairman, Director                              March 30, 2000
- --------------------------------------
          Julius R. Krevans

/s/Michael P. Moore*                                Director                                        March 30, 2000
- --------------------------------------
          Michael P. Moore

/s/J. Frank Whitley, Jr.*                           Director                                        March 30, 2000
- --------------------------------------
        J. Frank Whitley, Jr.

/s/James F. Zid*                                    Director                                        March 30, 2000
- --------------------------------------
            James F. Zid
</TABLE>

              *By:  /s/ David C. Bupp
                    -------------------------------------------
                        David C. Bupp, Attorney-in-fact


                                       46
<PAGE>   47
================================================================================



                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                             -----------------------


                              NEOPROBE CORPORATION


                             -----------------------


                             FORM 10-K ANNUAL REPORT


                           FOR THE FISCAL YEAR ENDED:

                                DECEMBER 31, 1999


                             -----------------------

                              FINANCIAL STATEMENTS

                             -----------------------



================================================================================
<PAGE>   48
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------


                       SECURITIES AND EXCHANGE COMMISSION

                              Washington, DC 20549


                            ------------------------


                              NEOPROBE CORPORATION

                            ------------------------



                             FORM 10-K ANNUAL REPORT

                           FOR THE FISCAL YEAR ENDED:

                                DECEMBER 31, 1999






                          ----------------------------


                              FINANCIAL STATEMENTS

                          ----------------------------


- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------

<PAGE>   49




INDEPENDENT AUDITORS' REPORT

The Board of Directors
Neoprobe Corporation

We have audited the accompanying consolidated balance sheets of Neoprobe
Corporation and subsidiaries as of December 31, 1999 and 1998, and the related
consolidated statements of operations, stockholders' equity (deficit) and
comprehensive income (loss), and cash flows for the years then ended. These
consolidated financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these consolidated
financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
accessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the financial position of Neoprobe Corporation
and subsidiaries as of December 31, 1999 and 1998, and the results of their
operations and their cash flows for the years then ended in conformity with
generally accepted accounting principles.


                                                              KPMG LLP





Columbus, Ohio
February 14, 2000





                                      F-1




<PAGE>   50






















REPORT OF INDEPENDENT ACCOUNTANTS

To the Directors and Stockholders of
Neoprobe Corporation

We have audited the accompanying consolidated statements of operations,
stockholders' equity and cash flows of Neoprobe Corporation and subsidiaries for
the year ended December 31, 1997. These financial statements are the
responsibility of the Company's management. Our responsibility is to express an
opinion on these financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated results of operations and cash flows of
Neoprobe Corporation and Subsidiaries for the year ended December 31, 1997 in
conformity with generally accepted accounting principles.



                                        Coopers & Lybrand LLP



Columbus, Ohio
February 20, 1998







                                      F-2

<PAGE>   51





NEOPROBE CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS

December 31, 1999 and 1998







<TABLE>
<CAPTION>
ASSETS                                                                 1999                   1998
                                                                -------------------    --------------------
<S>                                                                    <C>                     <C>
Current assets:
    Cash and cash equivalents                                          $ 4,882,537             $ 1,061,936
    Restricted cash                                                              -               1,993,000
    Available-for-sale securities                                                -                 448,563
    Accounts receivable, net                                               453,406               2,069,633
    Inventory                                                            1,134,427               1,578,912
    Prepaid expenses                                                       666,688                 720,420
    Other current assets                                                     7,177                 147,008
                                                                -------------------    --------------------

           Total current assets                                          7,144,235               8,019,472
                                                                -------------------    --------------------

Investment in affiliates                                                 1,500,000               1,500,000

Property and equipment                                                   2,167,245               3,073,931
    Less accumulated depreciation and amortization                       1,264,299               1,654,661
                                                                -------------------    --------------------

                                                                           902,946               1,419,270
                                                                -------------------    --------------------

 Intangible assets, net                                                    775,088                 773,863
 Other assets                                                                  300                 281,594
                                                                -------------------    --------------------

         Total assets                                                  $10,322,569            $ 11,994,199
                                                                ===================    ====================
</TABLE>



CONTINUED


                                      F-3
<PAGE>   52






NEOPROBE CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS, CONTINUED



<TABLE>
<CAPTION>
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)                                 1999                   1998
                                                                        -------------------    -------------------
<S>                                                                            <C>                    <C>
Current liabilities:
   Line of credit                                                              $   480,000            $ 1,000,000
   Notes payable to finance company                                                154,626                242,163
   Capital lease obligations, current                                               87,007                 99,539
   Accrued liabilities                                                           1,365,649              2,813,321
   Accounts payable                                                                759,961              2,857,717
   Deferred license revenue, current                                               800,000                      -
   Obligation to preferred stockholder, current                                  2,500,000                      -
                                                                        -------------------   --------------------

          Total current liabilities                                              6,147,243              7,012,740
                                                                        -------------------   --------------------

Capital lease obligations                                                           68,809                155,816
Deferred license revenue                                                         3,000,000                      -
Obligation to preferred stockholder                                              1,245,536                      -
                                                                        -------------------   --------------------

           Total liabilities                                                    10,461,588              7,168,556
                                                                        -------------------   --------------------

Commitments and contingencies

Stockholders' equity (deficit):
  Preferred stock; $.001 par value; 5,000,000 shares
    authorized at December 31, 1999 and December 31, 1998;
    none issued and outstanding (500,000 shares designated as                            -                      -
    Series A, $.001 par value, at December 31, 1999 and 1998;
    none outstanding)
  Common stock; $.001 par value; 50,000,000 shares
    authorized; 23,046,644 shares issued and outstanding at
    December 31, 1999; 22,887,910  shares issued and outstanding
    at December 31, 1998                                                            23,047                 22,888
  Additional paid-in capital                                                   119,407,204            120,272,899
  Accumulated deficit                                                         (119,569,270)          (115,395,283)
  Accumulated other comprehensive loss                                                   -                (74,861)
                                                                        -------------------   --------------------

          Total stockholders' equity (deficit)                                    (139,019)             4,825,643
                                                                        -------------------   --------------------

              Total liabilities and stockholders' equity (deficit)            $ 10,322,569           $ 11,994,199
                                                                        ===================   ====================
</TABLE>


           See accompanying notes to consolidated financial statements


                                      F-4
<PAGE>   53


NEOPROBE CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS



<TABLE>
<CAPTION>
                                                                        YEARS ENDED DECEMBER 31,
                                                        ----------------------------------------------------------
                                                             1999                1998                 1997
                                                        ----------------    ----------------    ------------------
<S>                                                         <C>                 <C>                   <C>
Revenues:
   Net sales                                                $ 9,245,664         $ 5,832,695           $ 5,127,917
   License revenue                                              200,000                   -                     -
                                                        ----------------    ----------------    ------------------
       Total revenues                                         9,445,664           5,832,695             5,127,917
                                                        ----------------    ----------------    ------------------

Cost of goods sold                                            4,507,774           1,403,951             1,575,699
                                                        ----------------    ----------------    ------------------
Gross profit                                                  4,937,890           4,428,744             3,552,218
                                                        ----------------    ----------------    ------------------

Operating expenses:
   Research and development                                   1,313,219          14,364,539            19,656,804
   Marketing and selling                                      4,471,363           5,267,617             4,306,717
   General and administrative                                 3,734,697           6,088,823             6,853,283
   Losses related to subsidiaries in liquidation                475,231           7,176,061                     -
                                                        ----------------    ----------------    ------------------
       Total operating expenses                               9,994,510          32,897,040            30,816,804
                                                        ----------------    ----------------    ------------------

Loss from operations                                        (5,056,620)        (28,468,296)          (27,264,586)
                                                        ----------------    ----------------    ------------------

Other income (expense):
   Gain on deconsolidation of subsidiaries                      699,146                   -                     -
   Interest income                                              103,672             598,834             2,156,795
   Interest expense                                            (82,853)           (189,785)              (61,445)
   Other                                                        162,668              26,495             1,922,708
                                                        ----------------    ----------------    ------------------
       Total other income                                       882,633             435,544             4,018,058
                                                        ----------------    ----------------    ------------------

Net loss                                                    (4,173,987)        (28,032,752)          (23,246,528)
                                                        ----------------    ----------------    ------------------

Conversion discount on preferred stock                        1,795,775                   -                     -
Accretion to potential redemption value                       1,804,225                   -                     -
Preferred stock dividend requirements                           120,536                   -                     -
                                                        ----------------    ----------------    ------------------

Loss attributable to common stockholders                 $ ( 7,894,523)       $(28,032,752)        $ (23,246,528)
                                                        ================    ================    ==================

Loss per common share
   (basic and diluted)                                       $   (0.34)          $   (1.23)            $   (1.02)
                                                        ================    ================    ==================

Weighted average number of shares
   outstanding during the year
   (basic and diluted)                                      23,003,461          22,842,232            22,734,642
                                                        ================    ================    ==================
</TABLE>



           See accompanying notes to consolidated financial statements




                                      F-5
<PAGE>   54



NEOPROBE CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) AND COMPREHENSIVE
INCOME (LOSS)





<TABLE>
<CAPTION>
                                                                                                  Accumulated
                                        Common Stock            Additional                           Other
                                   ------------------------       Paid-in       Accumulated       Comprehensive
                                    Shares        Amount          Capital         Deficit          Income(Loss)       Total
                                   ----------    ----------     ------------    -------------     -------------    ------------

<S>                                <C>           <C>           <C>             <C>                   <C>           <C>
Balance, December 31, 1996         22,586,527    $  22,587     $119,293,862    $(64,116,003)           $76,602     $55,277,048

Exercise of employee stock
  options at $2.50 to $15.75 per       85,510           85          361,500                                            361,585
  share
Issued to 401(k) plan at $14.61         1,672            2           24,422                                             24,424
Exercise of stock warrants at          89,721           89          355,092                                            355,181
  $3.32 to $6.05 per share
Comprehensive income (loss):
  Net loss                                                                      (23,246,528)                       (23,246,528)
  Foreign currency translation
    adjustment                                                                                        (237,887)       (237,887)
  Unrealized gain on available-
    for-sale securities                                                                                 20,569          20,569
                                                                                                                   ------------
Total comprehensive loss                                                                                           (23,463,846)
                                   ----------    ----------     ------------    -------------     -------------    ------------

Balance, December 31, 1997         22,763,430    $  22,763     $120,034,876     (87,362,531)         $(140,716)    $32,554,392


Exercise of employee stock
  options at $2.50 to $3.88 per        76,587           77          196,221                                            196,298
  share
Issued to 401(k) plan at $14.45         2,893            3           41,802                                             41,805
Issued restricted stock to             45,000           45                                                                  45
  officers
Comprehensive income (loss):
  Net loss                                                                      (28,032,752)                       (28,032,752)
  Foreign currency translation
    adjustment                                                                                          56,346          56,346
  Unrealized gain on available-for-sale
    securities                                                                                           9,509           9,509
                                                                                                                   ------------
Total comprehensive loss                                                                                           (27,966,897)
                                   ----------    ----------     ------------    -------------     -------------    ------------

Balance, December 31, 1998         22,887,910    $  22,888     $120,272,899   $(115,395,283)          $(74,861)     $4,825,643

Issued to 401(k) plan at $2.68         13,734           14           36,776                                             36,790
Issued restricted stock to            145,000          145                                                                 145
  officers
Issued redeemable convertible
  preferred stock and warrants,                                   1,022,290                                          1,022,290
  net of costs
Accretion of redeemable
  convertible  preferred stock
  to potential redemption value                                  (1,804,225)                                        (1,804,225)
Preferred stock dividend                                           (120,536)                                          (120,536)
  requirements
Comprehensive income (loss):
  Net loss                                                                        (4,173,987)                       (4,173,987)
  Foreign currency translation
  adjustment due to deconsolidation of                                                                 75,080           75,080
  subsidiaries
Unrealized gain on available-for-sale
  securities                                                                                             (219)            (219)
                                                                                                                   ------------
Total comprehensive loss                                                                                            (4,099,126)
                                   ----------    ----------    ------------     -------------     -------------    ------------

Balance, December 31, 1999         23,046,644    $  23,047     $119,407,204     $(119,569,270)         $     -       $(139,019)
                                   ==========    ==========    ============     =============     =============    ============
</TABLE>




          See accompanying notes to consolidated financial statements.





                                      F-6
<PAGE>   55





NEOPROBE CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS



<TABLE>
<CAPTION>
                                                                             YEARS ENDED DECEMBER 31,
                                                                 ---------------------------------------------
                                                                     1999            1998            1997
                                                                 ------------    ------------    ------------
<S>                                                              <C>             <C>             <C>
Cash flows from operating activities:
       Net loss                                                  $ (4,173,987)   $(28,032,752)   $(23,246,528)
       Adjustments to reconcile net loss to net cash provided by
         (used in) operating activities:
       Depreciation                                                   506,916       1,081,676         778,663
       Amortization of intangible assets                               46,046         190,888         117,859
       Provision for bad debts                                         16,005         134,249         130,660
       Loss on disposal and abandonment of assets                     369,580       1,100,704         664,068
       Losses related to subsidiaries in liquidation                  475,231       6,443,432            --
       Gain on deconsolidation of subsidiaries                       (699,146)           --              --
       Change in restricted cash                                    1,993,000      (1,615,348)       (187,627)
       Other                                                           34,844          17,815         (11,807)
       Change in operating assets and liabilities:
          Accounts receivable                                       1,491,098      (1,410,759)        315,406
          Inventory                                                   444,492      (1,165,258)       (199,335)
          Prepaid expenses and other assets                           269,927       1,144,128         465,764
          Accrued liabilities and other liabilities                (1,132,745)       (105,694)       (121,324)
          Accounts payable                                         (1,469,070)       (847,970)      1,404,095
          Deferred revenue                                          3,800,000            --        (2,000,000)
                                                                 ------------    ------------    ------------

     Net cash provided by (used in) operating activities            1,972,191     (23,064,889)    (21,890,106)
                                                                 ------------    ------------    ------------

Cash flows from investing activities:
   Purchases of available-for-sale securities                            --        (1,738,512)    (13,489,774)
   Proceeds from sales of available-for-sale securities               443,729       4,955,601       1,884,610
   Maturities of available-for-sale securities                          4,467      11,050,000      16,739,201
   Purchases of property and equipment                                (75,363)     (3,428,811)     (4,689,681)
   Proceeds from sales of property and equipment                       24,202            --              --
   Patent costs                                                       (27,104)       (239,400)       (197,873)
                                                                 ------------    ------------    ------------

   Net cash provided by investing activities                          369,931      10,598,878         246,483
                                                                 ------------    ------------    ------------

Cash flows from financing activities:
   Proceeds from issuance of preferred stock and warrants, net      2,818,065            --              --
   Proceeds from issuance of common stock, net                            145         196,343         716,766
   Proceeds from line of credit                                       480,000       1,275,750            --
   Payments under line of credit                                   (1,000,000)       (275,750)           --
   Payment of notes payable                                          (263,787)       (228,892)       (177,039)
   Payments under capital leases                                      (99,539)       (156,167)       (125,202)
   Proceeds from long-term debt                                          --         3,129,499         812,750
                                                                 ------------    ------------    ------------

   Net cash provided by financing activities                        1,934,884       3,940,783       1,227,275
                                                                 ------------    ------------    ------------

Effect of exchange rate changes on cash                                  --            43,791         (18,666)
                                                                 ------------    ------------    ------------

   Net increase (decrease) in cash and cash equivalents             4,277,006      (8,481,437)    (20,435,014)

   Cash and cash equivalents, beginning of year                     1,061,936       9,543,373      29,978,387

   Change in beginning cash and cash equivalents due to
     deconsolidation of subsidiaries                                 (456,405)           --              --

                                                                 ------------    ------------    ------------

   Cash and cash equivalents, end of year                        $  4,882,537    $  1,061,936    $  9,543,373
                                                                 ============    ============    ============
</TABLE>



          See accompanying notes to consolidated financial statements.




                                      F-7
<PAGE>   56

                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS


1.   ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES:

     a.   ORGANIZATION AND NATURE OF OPERATIONS: Neoprobe Corporation (the
          "Company"), a Delaware corporation, is engaged in the development and
          commercialization of gamma guided surgery products for the diagnosis
          and treatment of cancers and other diseases. The Company currently
          manufactures a line of gamma radiation detection equipment used in the
          application of intraoperative lymphatic mapping ("ILM"). The Company's
          ILM products are marketed through an exclusive worldwide distribution
          arrangement with Ethicon Endo-Surgery, Inc. ("EES"), a Johnson &
          Johnson company.

          For the year ended December 31, 1999, approximately $5.3 million (57%)
          of net sales were concentrated between two customers, one of which was
          EES. The loss of one of those customers could have a significant
          adverse effect on the Company's operating results. No individual
          customer constituted over 10% of net sales in 1998 or 1997.

     b.   FINANCIAL STATEMENT PRESENTATION:

          (1)  Principles of consolidation: The consolidated financial
               statements of the Company include the accounts of the Company and
               its majority-owned subsidiaries through December 31, 1998 (See
               Note 10(b).). All significant intercompany accounts and
               transactions were eliminated in consolidation for 1997 and 1998.
               During 1999, the Company deconsolidated both of its
               majority-owned subsidiaries as both were placed in statutory
               liquidation or receivership during 1999 (See Note 10(b).) and
               control of the subsidiaries was taken away from the Company. In
               connection with the deconsolidation, the Company recorded a gain
               of $699,146 during the fourth quarter of 1999. The gain resulted
               primarily from the removal from consolidation of vendor
               liabilities owed by the Company's Israeli subsidiary, Neoprobe
               Israel Ltd. ("Neoprobe Israel"). These liabilities are
               liabilities of the subsidiary (i.e., Neoprobe Israel) and not of
               the parent company (i.e., the Company). Therefore, by not
               consolidating the net liabilities of Neoprobe Israel, the
               Company, in effect, realized a gain in its unconsolidated
               financial statements as presented for the year ended December 31,
               1999.

          (2)  Adoption of liquidation basis of accounting: As of December 31,
               1998, the Company presented both of its majority-owned
               subsidiaries under the liquidation basis of accounting.
               Accordingly, at December 31, 1998, the assets of these
               subsidiaries were stated at their estimated net realizable value,
               and liabilities were stated at amounts expected to settle
               obligations due. During 1999, both of these subsidiaries were
               deconsolidated as noted above.

     c.   FOREIGN CURRENCY TRANSLATION: In accordance with Statement of
          Financial Accounting Standards (SFAS) No. 52, Foreign Currency
          Translation, assets and liabilities denominated in foreign currencies
          are translated at current exchange rates in effect at the balance
          sheet dates, and revenues and expenses are translated at the average
          monthly exchange rate. The differences resulting from such
          translations are included in other comprehensive income (loss).

     d.   FAIR VALUE OF FINANCIAL INSTRUMENTS: The following methods and
          assumptions were used to estimate the fair value of each class of
          financial instruments:

          (1)  Cash and cash equivalents, accounts receivable, accounts payable,
               and accrued liabilities: The carrying amounts approximate fair
               value because of the short maturity of these instruments.

          (2)  Available-for-sale securities: The fair values of debt securities
               and equity investments are based on quoted market prices at the
               balance sheet date.

          (3)  Line of credit and notes payable to finance company: The fair
               value of the Company's debt is estimated by discounting the
               future cash flows of each instrument at rates currently offered
               to the Company for similar debt instruments of comparable
               maturities by banks or finance companies. At December 31, 1999,
               the carrying values of these instruments approximate fair value.

     e.   CASH AND CASH EQUIVALENTS: Cash equivalents of $20,691 at December 31,
          1998 consist of corporate debt securities with a term of less than
          three months. There were no cash equivalents at December 31, 1999. For



                                      F-8
<PAGE>   57
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS


          purposes of the statements of cash flows, cash and cash equivalents
          consist of demand deposits, money market funds, highly liquid debt
          instruments and certificates of deposit with original maturities of
          three months or less. At December 31, 1998, the use of $993,000 of
          cash and cash equivalents was restricted under the terms of the
          Company's debt agreement financing the construction of Neoprobe Israel
          (See Note 10(b).) and $1 million was pledged as security related to
          the Company's line of credit. None of the cash and cash equivalents
          presented in the December 31, 1999 balance sheet are pledged or
          restricted in any way.

     f.   INVESTMENTS:

          (1)  Investments of up to 20% in affiliated companies with no readily
               determinable fair value are carried on the cost basis, and
               investments greater than 20%, where management has determined the
               Company does not exercise control, are carried on the equity
               basis.

          (2)  Available-for-sale securities are recorded at fair value.
               Unrealized holding gains and losses, net of the related tax
               effect, on available-for-sale securities are excluded from
               earnings and are reported as a separate component of accumulated
               other comprehensive income (loss) until realized. Realized gains
               and losses from the sale of available-for-sale securities are
               determined on a specific identification basis.

               A decline in the market value of any available-for-sale security
               below cost that is deemed to be other than temporary results in a
               reduction in carrying amount to fair value. The impairment is
               charged to earnings and a new cost basis for the security is
               established. Premiums and discounts are amortized or accreted
               over the life of the related available-for-sale sale security as
               an adjustment to yield using the effective interest method.
               Dividend and interest income are recognized when earned.

               Information related to amortized cost and fair value of
               available-for-sale securities, utilizing the specific
               identification method, at December 31, 1998 is provided below:

<TABLE>
<CAPTION>
                                                                                             GROSS
                                                                      AMORTIZED            UNREALIZED
                                    1998                                 COST                GAINS            FAIR VALUE
              -------------------------------------------------    -----------------    -----------------    -------------

<S>                                                                       <C>                     <C>           <C>
              Mortgaged-backed U.S. government securities                 $ 448,344               $  219        $ 448,563
                                                                   =================    =================    =============
</TABLE>

               Available-for-sale securities are classified as current based on
               the Company's intent to use them to fund short-term working
               capital needs.

     g.   INVENTORY: The components of inventory at December 31, 1999 and 1998,
          are as follows:

<TABLE>
<CAPTION>
                                                                         1999                 1998
                                                                  ----------------    ------------------

<S>                                                                     <C>                   <C>
                           Materials and component parts              $   104,441           $   277,505
                           Finished goods                               1,029,986             1,301,407
                                                                  ----------------    ------------------
                                                                      $ 1,134,427           $ 1,578,912
                                                                  ================    ==================
</TABLE>

          All components of inventory are valued at the lower of cost (first-in,
          first-out) or market. The Company adjusts inventory to market value
          when the net realizable value is lower than the carrying cost of the
          inventory. Market value is determined based on recent sales activity
          and margins achieved.

     h.   PROPERTY AND EQUIPMENT: Property and equipment are stated at cost.
          Property and equipment under capital leases is stated at the present
          value of minimum lease payments. Depreciation is computed using the
          straight-line method over the estimated useful lives of the
          depreciable assets ranging from 3 to 7 years, and includes
          amortization related to equipment under capital leases. Maintenance
          and repairs are charged to expense as incurred, while renewals and
          improvements are capitalized. Property and equipment includes $391,399
          and $393,869 of equipment under capital leases and accumulated
          amortization of $256,585 and $153,165 at December 31, 1999 and 1998,
          respectively. During 1999, the Company recorded losses of
          approximately $60,000



                                      F-9
<PAGE>   58
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          on the disposal of certain property and equipment primarily related to
          the separation of the majority of the Company's internal marketing
          force.

          The major classes of property and equipment are as follows:

<TABLE>
<CAPTION>
                                                                           1999                    1998
                                                                     ------------------    ---------------------

<S>                                                                        <C>                     <C>
                 Production machinery and equipment                        $   798,647             $    680,189
                 Other machinery and equipment, primarily
                    computers and research equipment                           656,740                1,270,034
                 Furniture and fixtures                                        527,567                  866,602
                 Leasehold improvements                                         91,513                   90,144
                 Other                                                          92,778                  166,962
                                                                     ------------------    ---------------------
                                                                           $ 2,167,245              $ 3,073,931
                                                                     ==================    =====================
</TABLE>


     i.   INTANGIBLE ASSETS: Intangible assets consist primarily of cost of
          patents. Patent costs are amortized using the straight-line method
          over the remaining lives of the patents of up to 17 to 20 years.
          Patent application costs are deferred pending the outcome of patent
          applications. Costs associated with unsuccessful patent applications
          and abandoned intellectual property are expensed when determined to
          have no recoverable value. The Company evaluates the potential
          alternative uses of intangible assets, as well as the recoverability
          of the carrying values of intangible assets on a recurring basis.

          The components of intangible assets at December 31, 1999 and 1998 are
as follows:

<TABLE>
<CAPTION>
                                                                       1999                 1998
                                                                  ----------------    ------------------

<S>                                                                     <C>                    <C>
                           Patents                                       $894,638              $871,944
                           Accumulated amortization                     (119,550)              (98,081)
                                                                  ----------------    ------------------
                                                                         $775,088              $773,863
                                                                  ================    ==================
</TABLE>

          During 1998, the Company recorded approximately $148,000 in general
          and administrative expense related to patents which will no longer be
          supported based on changes in the Company's business plan. The Company
          also recorded a $1 million impairment charge in 1998 related to
          technology licensed from The Dow Chemical Company (See Note 12(d).).

     j.   REVENUE RECOGNITION

          (1)  PRODUCT SALES AND WARRANTY: The Company derives revenues
               primarily from sales of its hand-held gamma detection
               instruments. The Company recognizes sales revenue when the
               products are shipped and the earnings process has been completed.
               Sales prices on products sold to EES are subject to retroactive
               annual adjustment based on a fixed percentage of the actual sales
               prices achieved by EES on sales to end customers made during each
               fiscal year. To the extent that the Company can reasonably
               estimate the end customer prices received by EES, the Company
               records sales to EES based upon these estimates. To the extent
               that the Company is not able to reasonably estimate end customer
               sales prices related to certain product sold to EES, the Company
               records revenue related to these product sales at the minimum
               price provided for under its distribution agreement with EES.

               The Company recognizes revenue related to the sales of products
               to be used for demonstration units when products are shipped and
               the earnings process has been completed. The Company's
               distribution agreements generally do not permit return of
               demonstration units in the ordinary course of business or have
               any performance obligations on the part of the Company other than
               normal product warranty obligations. To the extent that the
               earnings process has not been completed or that returns, if
               allowed, cannot be reasonably estimated, revenue is deferred.



                                      F-10
<PAGE>   59
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

               The Company warrants its products against defects in design,
               materials, and workmanship for a period of one year from the date
               of sale by EES. The Company's accrual for warranty expenses is
               adjusted periodically to reflect actual experience. EES also
               reimburses the Company for a portion of warranty expense incurred
               based on end customer sales made during a given fiscal year.

          (2)  LICENSE REVENUE: The Company recognizes license revenue in
               connection with its distribution agreement with EES on a
               straight-line basis over the five year initial term of the
               agreement based on the Company's obligations to provide ongoing
               support for the intellectual property being licensed such as
               patent maintenance and regulatory filings. As the license relates
               to intellectual property held or in-licensed by the Company, the
               Company incurs no significant cost associated with the
               recognition of this revenue.

          k.   RESEARCH AND DEVELOPMENT COSTS: All costs related to research and
               development are expensed as incurred.

          l.   INCOME TAXES: Income taxes are accounted for under the asset and
               liability method. Deferred tax assets and liabilities are
               recognized for the future tax consequences attributable to
               differences between the financial statement carrying amounts of
               existing assets and liabilities, and their respective tax bases
               and operating loss and tax credit carryforwards. Deferred tax
               assets and liabilities are measured using enacted tax rates
               expected to apply to taxable income in the years in which those
               temporary differences are expected to be recovered or settled.
               The effect on deferred tax assets and liabilities of a change in
               tax rates is recognized in income in the period that includes the
               enactment date.

          m.   STOCK OPTION PLANS: The Company applies the intrinsic value-based
               method of accounting prescribed by Accounting Principles Board
               ("APB") Opinion No. 25, Accounting for Stock Issued to Employees,
               and related interpretations, in accounting for its stock options.
               As such, compensation expense would be recorded on the date of
               grant only if the current market price of the underlying stock
               exceeded the exercise price.

          n.   USE OF ESTIMATES: The preparation of financial statements in
               conformity with generally accepted accounting principles requires
               management to make estimates and assumptions that affect the
               reported amounts of assets and liabilities and disclosure of
               contingent assets and liabilities at the date of the financial
               statements and the reported amounts of revenues and expenses
               during the reporting period. Actual results could differ from
               those estimates.

          o.   COMPREHENSIVE INCOME (LOSS): On January 1, 1998, the Company
               adopted SFAS No. 130, Reporting Comprehensive Income. This
               statement establishes standards for reporting and display of
               comprehensive income in a full set of general purpose financial
               statements. Comprehensive income consists of net income (loss),
               net unrealized gains (losses) on securities and foreign currency
               translation adjustments, and is presented in the consolidated
               statements of stockholders' equity (deficit) and accumulated
               other comprehensive income (loss). The Statement requires only
               additional disclosures in the consolidated financial statements;
               it does not affect the Company's financial position or results of
               operations. Due to the Company's net operating loss position,
               there are no income tax effects on comprehensive income
               components for any of the years presented. Prior year financial
               statements have been reclassified to conform to the requirements
               of SFAS No. 130.





                                      F-11
<PAGE>   60
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS


              The accumulated balances for each classification of accumulated
              other comprehensive income (loss) are as follows:

<TABLE>
<CAPTION>
                                                      GROSS
                                   FOREIGN          UNREALIZED        ACCUMULATED
                                  CURRENCY            GAINS             OTHER
                                 TRANSLATION       (LOSSES) ON       COMPREHENSIVE
                                 ADJUSTMENT         SECURITIES       INCOME (LOSS)
                                 ----------         ----------       -------------
<S>                               <C>               <C>               <C>
Balance, December 31, 1996        $ 106,461         $ (29,859)        $  76,602
  Change during 1997               (237,887)           20,569          (217,318)
                                  ---------         ---------         ---------
Balance, December 31, 1997         (131,426)           (9,290)         (140,716)

  Change during 1998                 56,346             9,509            65,855
                                  ---------         ---------         ---------
Balance, December 31, 1998          (75,080)              219           (74,861)
    Change during 1999               75,080              (219)           74,861
                                  ---------         ---------         ---------
Balance, December 31, 1999        $    --           $    --           $    --
                                  =========         =========         =========
</TABLE>

          p.   IMPAIRMENT OF LONG-LIVED ASSETS AND LONG-LIVED ASSETS TO BE
               DISPOSED OF: The Company accounts for long-lived assets in
               accordance with the provisions of SFAS No. 121, Accounting for
               the Impairment of Long-Lived Assets and for Long-Lived Assets to
               be Disposed of. This Statement requires that long-lived assets
               and certain identifiable intangibles be reviewed for impairment
               whenever events or changes in circumstances indicate that the
               carrying amount of an asset may not be recoverable.
               Recoverability of assets to be held and used is measured by a
               comparison of the carrying amount of an asset to future net
               undiscounted cash flows expected to be generated by the asset. If
               such assets are considered to be impaired, the impairment to be
               recognized is measured by the amount by which the carrying amount
               of the assets exceeds the fair value of the assets. Assets to be
               disposed of are reported at the lower of the carrying amount or
               fair value less costs to sell.

               During 1999, the Company recorded an impairment charge of
               $98,000, primarily related to property and equipment no longer
               expected to be recoverable as a result of the transfer of
               marketing responsibilities to the Company's new distribution
               partner. This impairment charge was included in general and
               administrative expenses on the 1999 statement of operations. In
               addition, 1999 research and development expenses included a
               non-cash write-off of $218,000 in capitalized pre-production
               costs written off as a result of recent accounting
               recommendations issued by the EITF. During 1998, the Company
               recorded an impairment charge of $222,000, primarily related to
               property and equipment no longer anticipated to be used in the
               RIGS initiative. This impairment charge was included in general
               and administrative expenses on the 1998 statement of operations.

          q.   NET LOSS PER COMMON SHARE: During 1997, the Company adopted SFAS
               No. 128, Earnings Per Share. SFAS No. 128 establishes standards
               for computing and presenting earnings per share ("EPS") and
               replaced the presentation of primary EPS with a presentation of
               basic EPS and diluted EPS. There are no differences in basic and
               diluted EPS for the Company related to any of the years
               presented. The net loss per common share for all periods
               presented excludes the number of common shares issuable on
               exercise of outstanding stock options and warrants into the
               Company's common stock since such inclusion would be
               antidilutive.

          r.   SEGMENT REPORTING: On December 31, 1998, the Company adopted SFAS
               No. 131, Disclosures about Segments of an Enterprise and Related
               Information. This Statement establishes standards for the way
               that public business enterprises report information about
               products and services, geographic areas, and major customers.
               This Statement supersedes SFAS No. 14, Financial Reporting for
               Segments of a Business Enterprise, but retains the requirement to
               report information about major customers.

          s.   RECLASSIFICATION: Certain prior years' amounts have been
               reclassified to conform with the 1999 presentation.





                                      F-12
<PAGE>   61

                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS



2.   ACCOUNTS RECEIVABLE AND CONCENTRATIONS OF CREDIT RISK:

     Accounts receivable at December 31, 1999 and 1998, net of allowance for
     doubtful accounts of $97,382 and $77,000, respectively, consist of the
     following:

<TABLE>
<CAPTION>
                                                             1999               1998
                                                        ----------------    --------------

<S>                                                           <C>             <C>
                           Trade                              $ 368,072       $ 1,611,247
                           Other                                 85,334           458,386
                                                        ----------------    --------------
                                                              $ 453,406       $ 2,069,633
                                                        ================    ==============
</TABLE>

     Trade receivables consist of receivables from customers based on the sale
     of the Company's products.

     At December 31, 1999, approximately 41% of the Company's net accounts
     receivable are due from EES, and another 44% of net accounts receivable are
     due from several customers in European countries. The Company does not
     believe it is exposed to significant credit risk related to EES based on
     the overall financial strength and credit worthiness of the customer. The
     Company believes its credit risk related to foreign exchange risk at
     December 31, 1999 is not material and that it has adequately addressed
     other credit risks related to its international customers in estimating the
     allowance for doubtful accounts.

     The Company estimates an allowance for doubtful accounts based on a review
     and assessment of specific accounts receivable. The activity in the
     allowance for doubtful accounts for the years ended December 31, 1999 and
     1998 is as follows:
<TABLE>
<CAPTION>
                                                                            1999               1998
                                                                       ---------------    ---------------

<S>                                                                          <C>               <C>
        Allowance for doubtful accounts at beginning of year                 $ 77,000          $ 130,660
        Provision for bad debts                                                16,005            134,249
        Writeoffs charged against the allowance                               (27,057)          (187,909)
        Recoveries of amounts previously charged off                           31,434                  -
                                                                       ---------------    ---------------
        Allowance for doubtful accounts at end of year                       $ 97,382           $ 77,000
                                                                       ===============    ===============
</TABLE>

3.   INVESTMENT IN AFFILIATE:

     Investment in affiliate at December 31, 1999 and 1998 represents an
     investment in XTL Biopharmaceuticals Ltd. ("XTL"). Subsequent to December
     31, 1999, the Company sold its equity interest in XTL for $1.5 million (See
     Note 18(b).). During 1999, the Company dissolved its 50/50 joint venture
     with Peptor Ltd., Neoprobe/Peptor JV LLC. The Company has one other
     investment, Cira Technologies, Inc., ("Cira"), in which the Company has an
     approximate 15% interest, which is accounted for on the cost method and is
     carried at zero at December 31, 1999.

4.   ACCRUED LIABILITIES AND ACCOUNTS PAYABLE:

     Accrued liabilities at December 31, 1999 and 1998 consist of the following:

<TABLE>
<CAPTION>
                                                                                  1999               1998
                                                                             ----------------    --------------

<S>                                                                                <C>               <C>
        Royalties due under research and development agreement                     $ 261,952         $ 319,693
        Compensation                                                                 244,029           547,993
        Warranty reserve                                                              84,637            78,000
        Inventory purchases                                                           61,952            38,860
        Accrued loan security (See Note 10(b.))                                            -           993,000
        Contracted services and other                                                713,079           835,775
                                                                             ----------------    --------------
                                                                                  $1,365,649        $2,813,321
                                                                             ================    ==============
</TABLE>


                                      F-13
<PAGE>   62
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS


     Accrued compensation at December 31, 1999 and 1998, includes $210,153 and
     $242,351, respectively, of separation payments due to former employees.

     Accounts payable at December 31, 1999 and 1998 consist of the following:

<TABLE>
<CAPTION>
                                                                                  1999               1998
                                                                             ----------------    --------------

<S>                                                                                <C>             <C>
        Trade                                                                      $ 410,031       $ 1,050,472
        Other                                                                        349,930         1,807,245
                                                                             ----------------    --------------
                                                                                   $ 759,961        $2,857,717
                                                                             ================    ==============
</TABLE>

5.   LINE OF CREDIT:

     At December 31, 1998, the Company had a $1 million revolving line of credit
     arrangement with a bank with an interest rate of 7.3%, which was secured by
     $1 million in pledged cash and investments of the Company. This line of
     credit expired under its terms on August 31, 1999. During August 1999, the
     Company negotiated a new line of credit with another bank. The new line of
     credit provides for a maximum outstanding principal of $500,000 and bears
     interest at the bank's prime rate plus one percent. This line of credit had
     an original maturity date of December 31, 1999, however, the maturity date
     of the new line has been extended through May 31, 2000. The new line of
     credit is secured by the assets of the Company, excluding intellectual
     property and equipment related to the Company's ILM technology. As of
     December 31, 1999, the interest rate was 9.5%, and $480,000 was outstanding
     under the new line of credit.

6.   INCOME TAXES:

     As of December 31, 1999, the Company's net deferred tax assets in the U.S.
     were approximately $38.3 million, related principally to net operating loss
     carryforwards of approximately $93.3 million available to offset future
     taxable income, if any, through 2019 and tax credit carryforwards of
     approximately $4.9 million (principally research and development) available
     to reduce future income tax liability after utilization of tax loss
     carryforwards, if any, through 2019. Due to the uncertainty surrounding the
     realization of these favorable tax attributes in future tax returns, all of
     the net deferred tax assets have been fully offset by a valuation
     allowance.

     Under Sections 382 and 383 of the Internal Revenue Code (IRC) of 1986, as
     amended, the utilization of U.S. net operating loss and tax credit
     carryforwards may be limited under the change in stock ownership rules of
     the IRC. As a result of ownership changes as defined by Sections 382 and
     383, which have occurred at various points in the Company's history,
     management believes utilization of the Company's net operating loss
     carryfowards and tax credit carryforwards may be limited.

     In general, it has been the intention of the Company to reinvest the
     earnings of non-U.S. subsidiaries in those operations. At December 31,
     1999, the Company's international subsidiaries have net operating loss
     carryforwards of approximately $9.1 million available to offset future
     statutory income in those jurisdictions. However, as both subsidiaries are
     currently in loss position, and as both subsidiaries are either in
     statutory liquidation or receivership, no amounts have been estimated to be
     remitted. Accordingly, no amounts have been provided for income tax
     consequences related to international subsidiaries. Due to the liquidation
     status of these subsidiaries, it is unlikely the Company will realize any
     benefit related to the net operating loss carryforwards within the foreign
     jurisdictions. However, the Company may be able to realize some benefit
     from these foreign losses under the U.S. tax laws.

7.   EQUITY:

     a.   REDEEMABLE PREFERRED STOCK: On February 16, 1999, the Company executed
          a purchase agreement (the "Purchase Agreement") to complete the
          private placement of 30,000 shares of 5% Series B redeemable
          convertible preferred stock (the "Series B") for gross proceeds of $3
          million ($2.8 million, net of certain placement costs). The Series B
          were issued with a $100 per share stated value and were convertible
          into common stock of the Company at the option of the Series B
          holders. In connection with the private placement, the Company also
          issued 2.9 million Class L warrants to purchase common stock of the
          Company at an initial exercise price of $1.03 per share. The Series B
          paid a 5% annual dividend payable in cash or common stock.



                                      F-14
<PAGE>   63
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          The Series B were convertible at variable prices based on the market
          price of the Company's common stock, subject to a conversion price
          floor of $0.55. The Class L warrants were also subject to variable
          exercise prices, subject to an exercise price floor of $0.62. Holders
          of the Series B had certain liquidation preferences over other
          stockholders under certain provisions as defined in the Agreement and
          had the right to cast the same number of votes as if the owner had
          converted on the record date. Pursuant to the private placement, the
          Company entered into a financial advisory agreement with the placement
          agent providing the agent with Unit Purchase Options ("UPOs")
          entitling the placement agent to purchase approximately 150,000 shares
          of common stock in the Company.

          The Company would have been obligated to redeem outstanding shares of
          Series B for $120 per share (i.e., a total of $3.6 million ) under
          certain conditions such as the delisting of the Company's stock from
          the NASDAQ Stock Market, as occurred on July 27, 1999 and other
          conditions outlined in the Purchase Agreement.

          The Series B were recorded by the Company during the first quarter of
          1999 at the amount of gross proceeds less the costs of the financing
          and the fair value of the warrants, and classified as mezzanine
          financing above the stockholders' equity section on the Company's
          interim balance sheets for 1999. The calculated conversion price at
          February 16, 1999, the first available conversion date, was $1.03 per
          share. In accordance with the FASB's Emerging Issues Task Force Topic
          D-60, the difference between the initial conversion price and the
          closing market price on February 16, 1999 of $1.81 resulted in an
          implied incremental yield to Series B holders of approximately $1.8
          million that is reflected as conversion discount in the Company's loss
          per share calculation for 1999. During the third quarter of 1999,
          management assessed the likelihood of redemption of the Series B as
          probable. As a result, the recorded book value of the Series B was
          accreted by approximately $1.8 million to bring the book value of the
          Series B up to the full redemption value of $3.6 million. This
          accretion is also reflected in the Company's loss per share
          calculation for 1999.

          On November 12, 1999, the Company entered into a binding letter of
          intent to retire the Series B, the Class L warrants and the UPOs and
          to cancel the financial advisory agreement with the placement agent
          (See Note 18 (a).). The letter of intent committed the Series B
          Holders to surrender the Series B shares and Class L warrants, and for
          the placement agent to surrender the UPOs and cancel the financial
          advisory agreement as well as to grant the Company general releases
          from potential litigation associated with the transaction. In exchange
          for the retirement of the Series B preferred shares and surrendering
          the Class L warrants and UPOs, the Company paid the Series B holders a
          total of $2.5 million and issued the Series B holders 3 million shares
          of common stock and warrants to purchase 3 million shares of common
          stock with an exercise price of $0.74 per share. However, at December
          31, 1999, final definitive agreements had not yet been signed.
          Therefore, at December 31, 1999, the Company reclassified its
          obligations to the Series B holders to reflect the $2.5 million
          payable in cash as a current liability and the remaining book value of
          the Series B, including dividends payable, as a long-term liability
          that will then be reclassified during the first quarter of 2000 to
          additional paid-in capital concurrent with the execution of the
          definitive agreement.

     b.   STOCK OPTIONS: At December 31, 1999, the Company has two stock-based
          compensation plans. Had compensation cost for the Company's two
          stock-based compensation plans been determined based on the fair value
          at the grant dates for awards under those plans, consistent with SFAS
          No. 123, the Company's net loss and net loss per share would have been
          increased to the pro forma amounts indicated below:


<TABLE>
<CAPTION>
                                              1999                 1998                  1997
                                              ----                 ----                  ----

<S>                                    <C>                   <C>                    <C>
Net loss              As reported     $  (7,894,523)        $  (28,032,752)        $(23,246,528)
                      Pro forma       $  (8,551,024)        $  (30,843,828)        $(25,273,241)

Net loss per common   As reported     $       (0.34)        $        (1.23)        $      (1.02)
  share (basic
  and diluted)        Pro forma       $       (0.37)        $        (1.35)        $      (1.11)
</TABLE>


          Under the Amended and Restated Stock Option and Restricted Stock
          Purchase Plan (the "Amended Plan"), and under the 1996 Stock Incentive
          Plan (the "1996 Plan"), the Company may grant incentive stock options,




                                      F-15
<PAGE>   64
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          nonqualified stock options, and restricted stock awards to full-time
          employees, and nonqualified stock options and restricted awards may be
          granted to consultants and agents of the Company. Total shares
          authorized under each plan are 2 million shares and 1.5 million
          shares, respectively. Under both plans, the exercise price of each
          option is greater than or equal to the closing market price of the
          Company's common stock on the day prior to the date of the grant.

          Options granted under the Amended Plan and the 1996 Plan generally
          vest on either a monthly basis over two to four years or on an annual
          basis over three years. Outstanding options under the plans, if not
          exercised, generally expire ten years from their date of grant or 90
          days from the date of an optionee's separation from employment with
          the Company.

          The fair value of each option grant was estimated on the date of the
          grant using the Black-Scholes option-pricing model with the following
          assumptions for 1999, 1998, and 1997 respectively: average risk-free
          interest rates of 5.1%, 5.0% and 6.4%; expected average lives of three
          to four years for each of the years presented; no dividend rate for
          any year; and volatility of 123% for 1999, 103% for 1998, and 72% for
          1997. The weighted average fair value of options granted in 1999, 1998
          and 1997 was $0.91, $2.44 and $7.88, respectively.

          A summary of the status of stock options under Company's stock option
          plans as of December 31, 1999, 1998, and 1997, and changes during the
          years ended on those dates is presented below:

<TABLE>
<CAPTION>
                                               1999                            1998                            1997
                                   -----------------------------    ----------------------------    ----------------------------
                                                       WEIGHTED                        WEIGHTED                        WEIGHTED
                                                       AVERAGE                          AVERAGE                         AVERAGE
                                                      EXERCISE                         EXERCISE                        EXERCISE
                                      OPTIONS           PRICE           OPTIONS          PRICE         OPTIONS           PRICE
                                   -------------     -----------    --------------    ----------    -------------     ----------
<S>                                   <C>                <C>            <C>              <C>           <C>               <C>
          Outstanding at
           beginning of year          1,459,445          $ 5.31         2,194,103        $ 7.81        2,002,138         $ 5.60
          Granted                       544,500            1.14           869,791          3.88          427,900          13.50
          Forfeited                   (519,943)            4.20       (1,527,862)          8.22        (150,425)          13.90
          Exercised                           -               -          (76,587)          2.56         (85,510)           4.25
                                   -------------                    --------------                  -------------

          Outstanding at
            end of year               1,484,002          $ 4.16         1,459,445        $ 5.31        2,194,103         $ 7.81
                                   =============                    ==============                  =============

          Options exercisable
            at end of year              809,736                           912,546                      1,369,557
                                   =============                    ==============                  =============
</TABLE>

          On September 28, 1998, the Company repriced 367,000 outstanding
          options held by non-officer employees of the Company. In exchange for
          surrendering outstanding options with exercise prices of $5.06 to
          $17.75, these employees were granted 183,440 new options with an
          exercise price of $1.50 per share, and the vesting term of the new
          options was extended by an average of one year from the original
          vesting term of the surrendered options. No expense was recorded as a
          result of this repricing. Included in outstanding options as of
          December 31, 1999, are 100,000 options exercisable at an exercise
          price of $2.50 per share which vest on the meeting of certain Company
          achievements.



                                      F-16
<PAGE>   65
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          The following table summarizes information about the Company's stock
options outstanding at December 31, 1999:


<TABLE>
<CAPTION>
                                                  OPTIONS OUTSTANDING                          OPTIONS EXERCISABLE
                                   ---------------------------------------------------    -------------------------------

                                                            WEIGHTED
                                       NUMBER                AVERAGE         WEIGHTED           NUMBER           WEIGHTED
                                   OUTSTANDING AT           REMAINING        AVERAGE        EXERCISABLE AT       AVERAGE
           RANGE OF EXERCISE        DECEMBER 31,           CONTRACTUAL       EXERCISE         DECEMBER 31,       EXERCISE
                 PRICES                 1999                   LIFE            PRICE              1999             PRICE
          ---------------------    ----------------       --------------    -----------   -----------------    ------------
<S>                                 <C>                   <C>               <C>           <C>                  <C>
          $  0.72 - $  1.50                590,802             9 Years          $1.23            143,497           $1.44
          $  2.00 - $  3.88                399,000             4 Years          $2.72            292,334           $2.79
          $  5.63 - $ 17.44                494,200             6 Years          $8.83            373,905           $9.31
                                   ----------------                                       ---------------

          $  0.72 - $17.44               1,484,002             7 Years          $4.16            809,736           $5.56
                                   ================                                       ===============
</TABLE>

         c.   RESTRICTED STOCK: During 1999 and 1998, the Company granted 65,000
              and 145,000 shares of restricted common stock, respectively, to
              officers of the Company under the 1996 Plan. However, of the 1998
              shares granted, 20,000 shares were forfeited subsequent to being
              granted but prior to issuance, and 80,000 shares were not issued
              by the Company's transfer agent until 1999.

              At December 31, 1999, the Company has 220,000 restricted shares
              issued and outstanding under the 1996 Plan. All of the restricted
              shares granted vest on a change of control of the Company as
              defined in the specific grant agreements. As a result, the Company
              has not recorded any deferred compensation due to the inability to
              assess the probability of the vesting event. Of the shares issued
              and outstanding, 75,000 also vest under certain conditions of
              termination as defined in an officer's employment agreement with
              the Company (See Note 12(e).).

         d.   STOCK WARRANTS: At December 31, 1999, there are approximately
              2,978,216 warrants outstanding to purchase common stock of the
              Company. The warrants are exercisable at prices ranging from $1.03
              to $17.92 per share with a weighted average exercise price per
              share of $1.17. The warrants expire on various dates from June
              2000 through February 2004. Outstanding warrants include 2,912,621
              warrants that were subject to variable conversion terms but that
              were cancelled subsequent to December 31, 1999, subject to a
              Settlement Agreement with the holder (See Note 18(a).).

          e.   COMMON STOCK RESERVED: Shares of authorized common stock have
               been reserved for the exercise of all options and warrants
               outstanding.

8.   SHAREHOLDER RIGHTS PLAN:

     During July 1995, the Company's Board of Directors adopted a Shareholder
     Rights Plan. Under the plan, one "Right" is to be distributed for each
     share of common stock held by shareholders on the close of business on
     August 28, 1995. The Rights are exercisable only if a person and its
     affiliate commences a tender offer or exchange offer for 15% or more of the
     Company's common stock, or if there is a public announcement that a person
     and its affiliate has acquired beneficial ownership of 15% or more of the
     common stock, and if the Company does not redeem the Rights during the
     specified redemption period. Initially, each Right, upon becoming
     exercisable, would entitle the holder to purchase from the Company one unit
     consisting of 1/100th of a share of Series A Junior Participating preferred
     stock at an exercise price of $35 (which is subject to adjustment). Once
     the Rights become exercisable, if any person, including its affiliate,
     acquires 15% or more of the common stock of the Company, each Right other
     than the Rights held by the acquiring person and its affiliate becomes a
     right to acquire common stock having a value equal to two times the
     exercise price of the Right. The Company is entitled to redeem the Rights
     for $0.01 per Right at any time prior to the expiration of the redemption
     period. The Shareholder Rights Plan and the Rights will expire on August
     28, 2005. The Board of Directors may amend the Shareholder Rights Plan,
     from time to time, as considered necessary (See Note 7(a).)


                                      F-17
<PAGE>   66
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

     9.   RESTRUCTURING AND SUBSIDIARY LIQUIDATION ACTIVITIES: In 1995 and 1996,
          the Company completed a series of clinical trials of its first
          generation targeting agent for the detection of colorectal cancer,
          RIGScan(R) CR49. Also during 1996, the Company submitted applications
          to European and U.S. regulatory agencies requesting approvals to begin
          marketing RIGScan CR49 for the detection of metastatic colorectal
          cancer. Late in the fourth quarter of 1997, the Company received
          requests for further information from United States and European
          regulatory agencies following review of its applications. The Company
          negotiated with these regulatory agencies throughout the first half of
          1998 regarding the best way to respond to the requests for additional
          information.


          As a result of the delays in approval anticipated as a result of the
          information requests, the Company began to evaluate various options
          during the first quarter of 1998 to cut operating costs and
          restructure the Company around its core ILM business while suspending
          the majority of ongoing research activities related to its
          radio-immunoguided surgery ("RIGS") and activated cellular therapy
          ("ACT") initiatives. Further developments during 1998 and in 1999
          forced the Company to continually reevaluate its strategic plan and to
          implement additional cost cutting and restructuring activities
          involving both RIGS and ACT that included a series of incremental
          headcount reductions and the shutdown of the Company's two
          majority-owned international subsidiaries. The Company is still
          working to commercialize both RIGS and ACT through a development
          partner; however, no such partner has been secured as of December 31,
          1999. As the Company has no commercial RIGS or ACT products, the
          effect of these restructuring activities on the Company's ongoing
          operations involved primarily the elimination of research and
          development activities and the impairment of facilities and equipment
          anticipated to be used in the RIGS manufacturing process. A
          description of each action committed to by the Company, its timing and
          impact on the Company's financial statements is included below. Each
          of the items presented represents a separate incremental action taken.
          The Company made no significant adjustments to charges related to
          these items subsequent to the initial recording.


          -    During the first quarter of 1998, the Company notified and
               severed 16 individuals as a result of expected delays in the
               approval process for RIGScan CR49. The Company recorded
               separation costs related to these severed employees of $719,000
               reflected in research and development expenses and $69,000
               reflected in general and administrative expenses. At this time,
               however, the Company believed it would still be able to raise
               additional funding to restart its RIGS initiative or to find a
               development partner to fund the initiative and engaged an
               investment banking firm to assist the Company in identifying such
               a partner.

          -    During the third quarter of 1998, following the determination
               that the Company's Swedish subsidiary, Neoprobe Europe AB
               ("Neoprobe Europe") would no longer be needed in a revised
               RIGScan CR49 manufacturing process and unsuccessful preliminary
               attempts to sell the facility, the Company recorded an impairment
               charge of $1.7 million determined in accordance with SFAS No. 121
               to adjust the net book value of the facility and related assets
               to their net realizable value based on preliminary negotiations
               to sell the assets. The Company also recorded separation costs of
               $235,000 related to the severing of Neoprobe Europe's fifteen
               employees. Both charges are reflected in losses related to
               subsidiaries in liquidation for the year ended December 31, 1998

          -    During the fourth quarter of 1998, the Company notified and
               severed an additional 13 individuals from its U.S. operations due
               to the lack of identification of a development partner and the
               inability to raise additional capital. The Company recorded
               separation costs related to these severed employees of $405,000
               reflected in research and development expenses. The Company also
               recorded impairment charges of $222,000 during the fourth quarter
               of 1998 in accordance with SFAS No. 121 related to assets no
               longer anticipated to be used in the RIGS initiative (reflected
               in general and administrative expenses for the year ended
               December 31, 1998).

          -    During the fourth quarter of 1998, due also to the lack of
               identification of a RIGS development partner and inability to
               raise additional capital, the Company decided to suspend
               construction and validation activities at Neoprobe Israel and to
               attempt to sell the facility or shut it down in the event no
               buyer could be found. The Company recorded separation costs
               related to notifying and severing Neoprobe Israel's seventeen
               employees of $79,000 that were reflected in losses related to
               subsidiaries in liquidation for the year ended December 31, 1998.
               The Company also applied the methodology of SFAS No. 121 in
               estimating the net realizable value of the assets of Neoprobe
               Israel and recorded an impairment charge of $4.1 million



                                      F-18
<PAGE>   67
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

               for the year ended December 31, 1998 that is reflected in losses
               related to subsidiaries in liquidation. In addition, the Company
               accrued its contractual commitment to guarantee a limited portion
               of the debt of Neoprobe Israel and reflected the associated
               charge in losses related to subsidiaries in liquidation for the
               year ended December 31, 1998. (See Note 10(b).).

          -    In September 1999, based on entering into an exclusive worldwide
               distribution agreement with EES, the Company notified two
               executives that they would be severed. The Company recorded
               separation costs related to these severed employees of $150,000
               reflected in marketing and selling expenses and $106,000
               reflected in general and administrative expenses for the year
               ended December 31, 1999.

          -    In October 1999, an additional 6 employees representing the
               majority of the Company's internal marketing staff were notified
               and severed. The Company recorded separation costs related to
               these severed employees of $145,000 reflected in marketing and
               selling expenses for the year ended December 31, 1999. In
               connection with severing these individuals, the Company recorded
               a $98,000 impairment of assets in accordance with SFAS No. 121
               and $60,000 in losses on disposal of assets included in general
               and administrative expenses for the year ended December 31, 1999.

               These restructuring activities were determined based on formal
               actions approved by the Company's management using the best
               information available to it at the time. The amounts the Company
               may ultimately incur may change as certain of the activities
               outlined above are brought to their completion. A summary of the
               effects by financial statement line item, as well as changes in
               the amounts accrued is summarized in the table below:

<TABLE>
<CAPTION>
                                          EMPLOYEE             ASSET
                                         SEPARATION        IMPAIRMENTS/         CONTRACTUAL
                                            COSTS            DISPOSALS          COMMITMENTS           TOTAL
                                        -----------         -----------         -----------         -----------
<S>                                     <C>                 <C>                 <C>                 <C>
1998:
  Research and development              $ 1,124,155         $      --           $      --           $ 1,124,155
  Marketing and selling                        --                  --                  --                  --
  General and administrative                 69,234             222,356                --               291,590
  Losses related to subsidiaries
     in liquidation                         314,152           5,868,909             993,000           7,176,061
  Non-cash write-downs                         --            (6,091,265)               --            (6,091,265)
  Paid in 1998                           (1,265,190)               --                  --            (1,265,190)
                                        -----------         -----------         -----------         -----------

Balance accrued at
   December 31, 1998                    $   242,351         $      --           $   993,000         $ 1,235,351
                                        -----------         -----------         -----------         -----------

1999:
  Research and development                     --                  --                  --                  --
  Marketing and selling                     295,678                --                  --               295,678
  General and administrative                105,625             158,268                --               263,893
  Effects of deconsolidation                   --                  --              (993,000)           (993,000)
  Non-cash write-downs                         --              (158,268)               --              (158,268)
  Paid in 1999                             (433,501)               --                  --              (433,501)
                                        -----------         -----------         -----------         -----------

Balance accrued at
  December 31, 1999                     $   210,153         $      --           $      --           $   210,153
                                        ===========         ===========         ===========         ===========
</TABLE>

         As a result of these restructuring and subsidiary liquidation
         activities, the Company achieved its first quarter of operating
         profitability in the Company's history during the fourth quarter of
         1999. The Company expects to continue to see benefits from these
         restructuring activities during 2000 and subsequent years.



                                      F-19
<PAGE>   68
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

10.      SEGMENTS AND SUBSIDIARIES INFORMATION:

         a.  SEGMENTS: The Company owns or has rights to intellectual property
             involving three primary areas of cancer diagnosis and treatment
             including: hand-held gamma detection instruments currently used
             primarily in the application of Intraoperative Lymphatic Mapping
             ("ILM"), diagnostic radiopharmaceutical products to be used in the
             Company's proprietary RIGS process, and Activated Cellular Therapy
             ("ACT"). During 1998, the Company's business plan suspended ongoing
             research activities related to RIGS and ACT to allow the Company to
             focus primarily on the hand-held gamma detection instruments while
             efforts are carried out to find partners or licensing parties to
             fund future RIGS and ACT research and development. The Company
             incurred no costs in 1999 related to ACT. Gains and losses incurred
             in 1999 associated with the RIGS initiative were related to the
             Company's majority-owned subsidiary, Neoprobe (Israel) Ltd.
             ("Neoprobe Israel"; see Note 10(b).).

     The information in the following table is derived directly from the
     segments' internal financial reporting used for corporate management
     purposes. Such segment reporting follows generally accepted accounting
     principles. The expenses attributable to corporate activity, including
     amortization and interest, and other general and administrative costs are
     not allocated to the operating segments.

<TABLE>
<CAPTION>
($ AMOUNTS IN THOUSANDS)

                     1999                        RIGS            ILM             ACT           UNALLOCATED        TOTAL
==============================================================================================================================
<S>                                          <C>              <C>              <C>              <C>              <C>
Net sales
      United States customers                $   --           $  8,124         $   --           $   --           $  8,124
      International customers                    --              1,122             --               --              1,122
License revenue                                  --                200             --               --                200
Research and development expenses                --             (1,313)            --               --             (1,313)
Marketing and selling expenses                   --             (4,471)            --               --             (4,471)
General and administrative expenses              --               --               --             (3,735)          (3,735)
Losses related to subsidiaries in
   liquidation                                   (475)            --               --               --               (475)
Other income                                      699             --               --                184              883
Total assets, net of depreciation and
   amortization (United States)                   240            2,717             --              7,366           10,323
Capital expenditures                             --                  2             --                 73               75

               1998
- -------------------------------------
Net sales
      United States customers                $   --           $  5,333         $   --           $   --           $  5,333
      International customers                    --                430             --                 70              500
Research and development expenses              (8,470)          (3,380)          (1,467)          (1,048)         (14,365)
Marketing and selling expenses                   --             (5,268)            --               --             (5,268)
General and administrative expenses              --               --               --             (6,089)          (6,089)
Losses related to subsidiaries in              (7,176)            --               --               --             (7,176)
   liquidation
Other income                                     --               --               --                436              436
Total assets, net of depreciation and
   amortization:
        United States                             187            4,839             --              6,261           11,287
        Neoprobe Europe                           152             --               --               --                152
        Neoprobe Israel                           555             --               --               --                555
Capital expenditures                            2,851              578             --               --              3,429
</TABLE>

                                      F-20
<PAGE>   69





<TABLE>
<CAPTION>
               1997
- -------------------------------------

<S>                                          <C>              <C>              <C>              <C>              <C>
Net sales
      United States customers                $   --           $  4,677         $   --           $   --           $  4,677
      International customers                    --                386             --                 65              451
Research and development expenses             (12,814)          (4,933)          (1,910)            --            (19,657)
Marketing and selling expenses                   --             (4,307)            --               --             (4,307)
General and administrative expenses              --               --               --             (6,853)          (6,853)
Other income                                     --               --               --              4,018            4,018
Total assets, net of depreciation and
   amortization:
        United States                             182            1,248               84           30,502           32,016
        Neoprobe Europe                         1,631             --               --               --              1,631
        Neoprobe Israel                         7,926             --               --               --              7,926
Capital expenditures                            4,504              102               84             --              4,690
</TABLE>


     b.   SUBSIDIARIES: The Company's suspended RIGS initiative included the
          operations of the Company's two majority-owned international
          subsidiaries, Neoprobe Europe and Neoprobe Israel. Neoprobe Europe was
          acquired in 1993 primarily to perform a portion of the manufacturing
          process of the monoclonal antibody used in the first RIGS product to
          be used for colorectal cancer, RIGScan CR49. Neoprobe Israel was
          founded to radiolabel RIGScan CR49. Neoprobe Europe and Neoprobe
          Israel also both performed limited research and development activities
          related to the Company's RIGS process on behalf of the U.S. parent
          company. Under SFAS No. 131, neither subsidiary is considered a
          segment. Neoprobe Europe recorded intrasegment revenue for
          RIGS-related research performed on behalf of the U.S. parent company
          of $1.2 million and $2.7 million in 1998 and 1997, respectively.
          During 1998, the Company initiated steps to liquidate both Neoprobe
          Europe and Neoprobe Israel as a result of the suspension of RIGS
          research and development activities.

          Neoprobe Europe. As a result of shutting down Neoprobe Europe, selling
          the majority of its assets and severing all its employees, the Company
          adopted the liquidation basis of accounting with respect to Neoprobe
          Europe for the year ended December 31, 1998. The Company's
          consolidated balance sheet at December 31, 1998 therefore includes
          approximately $150,000 in current assets of Neoprobe Europe at their
          net realizable value, and $70,000 in liabilities at the amounts
          expected to settle the obligations due. The assets of Neoprobe Europe
          at December 31, 1998 included primarily accounts receivable related to
          the sale of certain assets and cash. The liabilities of Neoprobe
          Europe included primarily amounts due to operating vendors and
          consultants for the liquidation process that were settled in 1999 at
          their recorded values. Included in losses related to subsidiaries in
          liquidation for 1998 is $1.7 million related to impairment of assets
          and $235,000 related to severance and other exit costs. Losses from
          operations incurred prior to the decision to liquidate include
          $807,000 reflected in research and development and $393,000 reflected
          in general and administrative expenses.

          The Company incurred no costs related to Neoprobe Europe during 1999.
          During 1999, the Company voluntarily placed Neoprobe Europe into
          statutory liquidation under the laws of Sweden. As a result of the
          loss of control due to the statutory liquidation, Neoprobe Europe was
          deconsolidated and is therefore not included in the financial
          statements of the Company as of December 31, 1999. The deconsolidation
          of Neoprobe Europe had no material impact on the results of operations
          for the year ended December 31, 1999.

          Neoprobe Israel. Neoprobe Israel was founded by the Company and Rotem
          Industries Ltd. ("Rotem") in 1994 to construct and operate a
          radiolabeling facility near Dimona, Israel. Rotem currently has a 5%
          equity interest in Neoprobe Israel. Based on the Company's inability
          to attract a development partner for its RIGS products, the Company
          decided during the fourth quarter of 1998 to suspend construction and
          validation activities at Neoprobe Israel. Following suspension of RIGS
          development activities at Neoprobe Israel and unsuccessful attempts to
          sell the facility, the Company initiated actions during the fourth
          quarter of 1998 to liquidate Neoprobe Israel. As of December 31, 1998,
          the Company adopted the liquidation basis of accounting with respect
          to Neoprobe Israel. The Company applied the valuation methodology of
          SFAS No. 121 in recording an impairment of the value of the facility
          (including installed isolation, water-for-injection and air handling
          and vialing equipment) down to its estimated fair value less costs to
          sell. However, approximately $4.9 million of the construction of the
          facility was



                                      F-21
<PAGE>   70
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

     financed by an Israeli bank (the "Bank"). In applying the liquidation basis
     of accounting, the Company believes it appropriate to present assets net of
     the related bank debt because of the following: Neoprobe Israel did not
     have access to adequate resources to repay such debt and payables as of
     December 31, 1998. If formal collection actions were initiated by any or
     all of the creditors, the Company believes that the creditors would have
     had no recourse against the Company, except for the Bank whose recourse
     would be limited to the Company's limited financial guarantee and it
     mortgage on Neoprobe's facility itself. Accordingly, the value of the
     facility was offset by the balance of the debt. Management of the Company
     consulted with legal counsel in Israel regarding the Company's obligations
     in the event of voluntary or involuntary bankruptcy. Management believed at
     December 31, 1998 based on the opinion of Israeli counsel that the Company
     would not be required to make a capital contribution to pay off the bank
     debt. As a result, the consolidated balance sheet at December 31, 1998
     included approximately $555,000 in current assets of Neoprobe Israel at
     their net realizable value, and $876,000 in liabilities at the amounts
     expected to settle the obligations due. Current assets were comprised
     primarily of cash and cash equivalents and current liabilities included
     primarily amounts due trade creditors related to the construction of the
     facility.

     Included in losses related to subsidiaries in liquidation for 1998 is $5.1
     million related primarily to non-cash adjustment of assets and liabilities
     to their net realizable value and $79,000 related to severance and other
     exit costs. Losses from operations incurred prior to the decision to
     liquidate include $549,000 reflected in research and development and
     $459,000 reflected in general and administrative expenses. During 1999,
     Neoprobe Israel incurred approximately $475,000 in operating-related
     charges, primarily interest, that is included in losses related to
     subsidiaries in liquidation for the year ended December 31, 1999.

     During October 1999, a representative of the Bank was appointed as receiver
     for Neoprobe Israel. As a result of the receivership, management believes
     that the Company no longer controls Neoprobe Israel. As a result, Neoprobe
     Israel was deconsolidated as of December 31, 1999. The Company's
     consolidated balance sheet at December 31, 1999, therefore, does not
     reflect the financial position of Neoprobe Israel. At December 31, 1999,
     Neoprobe Israel had outstanding debt to a bank of $4.9 million. The funds
     were drawn from the Bank pursuant to an investment program approved by the
     State of Israel's Finance Committee to construct and operate the
     radiolabeling facility. Amounts received under the loan agreement are
     secured by property obtained through the use of proceeds. The loans with
     the bank are guaranteed by the State of Israel's Investment Centre. The
     Company has also guaranteed a limited portion of the loan based on a
     percentage of the loan drawn. The Company's guarantee is fully secured by
     $993,000 in cash deposited in an account with the Bank for which the bank
     has the right of set-off. However, as the Company continues to believe it
     may be required to relinquish these funds currently deposited as security
     for the loan for which the Bank has the right of setoff, the Company has
     removed both the cash and the offsetting liability from its balance sheet
     at December 31, 1999 (See Note 16.)

11.  RELATED-PARTY TRANSACTIONS:

     A partner of a law firm which provides various legal services to the
     Company, including patent and trademark filings and prosecuting patent and
     trademark applications, is a former director of the Company. The partner's
     officer and director affiliations ended in May 1997. Costs incurred related
     to services performed and patent maintenance fees paid by this firm
     approximated $302,000 for the year ended December 31, 1997.

12.  AGREEMENTS:

     a.   SUPPLY AGREEMENTS: In December 1997, the Company entered into an
          exclusive supply agreement with eV Products ("eV"), a division of
          II-VI Incorporated, for the supply of certain crystals and associated
          electronics to be used in the manufacture of the Company's proprietary
          line of hand-held gamma detection instruments. The original term of
          the agreement expires on December 31, 2002, but may be automatically
          extended for an additional three years. The agreement calls for the
          Company to purchase minimum quantities of crystals used by the Company
          in order to maintain exclusivity. Total purchases under the supply
          agreement were $587,000, $478,000 and $5,000 for the years ended
          December 31, 1999, 1998 and 1997, respectively. The Company expects to
          purchase a minimum of $250,000 in crystals from eV in 2000 in order to
          maintain the exclusivity provision. eV is not the only potential
          supplier of such crystals; however, any prolonged interruption from
          this source could restrict the availability of the Company's probe
          products, which would affect operating results adversely.

          In May 1999, the Company entered into a supply agreement with The
          MedTech Group, Inc. ("MedTech") for the supply of BlueTip(TM) probes
          and related accessories. The original term of the agreement expires on


                                      F-22
<PAGE>   71
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          December 31, 2003, but may be automatically extended for an additional
          three years. The agreement calls for the Company to deliver annual
          product forecasts to MedTech and for the Company to purchase at least
          75% of forecasted product demand on a quarterly basis. Total purchases
          under the supply agreement were $140,000 for the year ended December
          31, 1999. The Company expects to purchase a minimum of $60,000 in
          BlueTip probes and accessories from MedTech through the first quarter
          of 2000. The agreement may be terminated by the Company upon twelve
          months notice or in the event of failure to supply or by either party
          due to material breach or insolvency.

     b.   MARKETING AND DISTRIBUTION AGREEMENTS: In September 1996, the Company
          executed a License and Distributorship Agreement with the United
          States Surgical Corporation ("USSC"). Effective October 17, 1997, the
          Company and USSC agreed to terminate the agreement, as amended. In
          connection with the termination, after receipt of payment, the Company
          agreed to pay USSC net commissions on orders received prior to the
          effective date of the termination and to continue to warranty and
          service devices sold under the terms of the agreement. The parties
          have also agreed to discharge and release the other from all remaining
          claims and financial obligations relating to the agreement, including
          license fees. The Company had also received $2 million from USSC on
          execution of the agreement in 1996 and recognized this amount as
          income in the fourth quarter of 1997 concurrent with the termination
          of the agreement.

          In April 1998, the Company executed a non-exclusive Sales and
          Marketing Agreement with Ethicon Endo-Surgery, Inc. ("EES"), a Johnson
          & Johnson company, to market and promote certain of the Company's line
          of hand-held gamma detection instruments. On January 29, 1999, the
          Company provided EES with notice of the Company's intent to terminate
          the agreement effective March 1, 1999.

          Effective February 1, 1999, the Company executed a Sales and Marketing
          Agreement with KOL BioMedical Instruments, Inc. ("KOL") to market the
          Company's current and future gamma guided surgery products in the U.S.
          The Company terminated the agreement with KOL effective October 31,
          1999. In connection with the termination, the Company agreed to pay
          KOL any outstanding commission amounts due as well as a fee to
          terminate the agreement. The $700,000 termination fee is included in
          marketing and selling expenses for the year ended December 31, 1999.
          The Company also agreed to repurchase any unsold demonstration units
          that had been purchased by KOL up to a maximum of $1 million. The
          Company repurchased a total of $860,000 in demonstration equipment
          from KOL. The Company's inventory balance at December 31, 1999
          includes approximately $625,000 in refurbished demonstration equipment
          which EES has agreed to purchase, but which had not yet shipped as of
          December 31, 1999, valued at the lower of cost or market.

          The Company entered into a new Distribution Agreement (the
          "Agreement") with EES effective October 1, 1999 for an initial
          five-year term with options to extend for two successive two-year
          terms. Under the Agreement, the Company will manufacture and sell its
          ILM products (the "Products") exclusively to EES, who will distribute
          the Products globally. EES agreed to purchase minimum quantities of
          the Company's Products over the first three years of the term of the
          Agreement and to reimburse the Company for certain research and
          development costs and a portion of the Company's warranty costs. EES
          also agreed to purchase the demonstration units repurchased from KOL
          at cost. The Company is obligated to continue certain product
          maintenance activities and to provide ongoing regulatory support for
          the Products.

          EES may terminate the Agreement if the Company fails to supply
          Products for specified periods, commits a material breach of the
          Agreement, suffers a change of control of the Company to a competitor
          of EES, or becomes insolvent. If termination is due to failure to
          supply or a material breach by the Company, EES would have the right
          to use the Company's intellectual property and regulatory information
          to manufacture and sell the Products exclusively on a global basis for
          the remaining term of the Agreement with no additional financial
          obligation to the Company. If termination is due to insolvency or a
          change of control that does not affect supply of the Products, EES has
          the right to continue to sell the Products on an exclusive global
          basis for a period of six months or require the Company to repurchase
          any unsold Products in its inventory.

          Under the Agreement, EES received a non-exclusive, worldwide paid-up
          license (the "License") to the Company's ILM intellectual property to
          make and sell other products that may be developed using the



                                      F-23
<PAGE>   72
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          Company's ILM intellectual property. The term of the License is the
          same as that of the Agreement. EES paid the Company a non-refundable
          license fee of $4 million. The Company intends to recognize the
          license fee as revenue on a straight-line basis over the five-year
          initial term of the Agreement. If the Agreement is terminated by the
          Company as a result of a material breach by EES, EES would be required
          to pay the Company a royalty on all products developed and sold by EES
          using the Company's ILM intellectual property. In addition, the
          Company is entitled to a royalty on any ILM product commercialized by
          EES that does not infringe any of the Company's existing intellectual
          property.

     c.   RESEARCH AND DEVELOPMENT: Under a research and development agreement
          between the Company, The Ohio State University, and the Department of
          Development of the State of Ohio, the Company believes it is obligated
          to pay the State of Ohio royalties calculated as a percentage of net
          sales of certain products utilizing the results of the sponsored
          research (i.e., the Neoprobe(R)1000 and Neoprobe(R) 1500 systems and
          RIGScan CR49), a sharing of proceeds received from the sale of
          technology, and a portion of the royalties collected from any license
          the Company may grant. The Company has an option to terminate its
          royalty obligation following completion of the research period by
          making a termination payment to the State of Ohio.

     d.   LICENSE AND TECHNOLOGY AGREEMENTS: In February 1996, the Company and
          XTL Biopharmaceuticals Ltd. ("XTL") executed a series of agreements,
          including an Investment Agreement and a Research and Development
          Agreement whereby XTL will perform specific research activities using
          XTL's proprietary technology for the development of future products
          for the Company. The Company has sold its equity interest in XTL (See
          Note 18(b).); however, the Company retains certain technology rights
          to research performed by XTL on the Company's behalf. The Company
          recorded research and development expenses of $595,000 and $405,000
          during 1998 and 1997, respectively, related to research performed on
          its behalf by XTL.

          In March 1996, the Company executed a Subscription and Option
          Agreement with Cira Technologies, Inc. ("Cira"), under which the
          Company received a 10% equity interest in Cira and an option to
          increase its interest in Cira by 15%. A former chairman of the Company
          is a director and shareholder of Cira. In April 1998, the Company and
          Cira entered into a restated Subscription and Option Agreement that
          terminated the March 1996 agreement. Under the new Subscription and
          Option Agreement, the Company agreed to purchase additional shares of
          Cira stock for $.001 per share. The purchase of the additional shares
          by Neoprobe brought its interest in Cira to 15% of the total issued
          and outstanding shares of Cira common stock. Since 1996, the Company
          has entered into a series of technology license and revenue sharing
          agreements that have been modified from time-to-time. In connection
          with these agreements, the Company incurred approximately $337,000 and
          $239,000 in research and development expenses for the years ended
          December 31, 1998 and 1997. The Company incurred no expenses in 1999
          related to technology for which Cira has rights and has no outstanding
          obligations to incur future expenses as of December 31, 1999. The
          Company does, however, retain certain milestone and revenue sharing
          rights in the event Cira is successful in licensing or commercializing
          certain technologies.

          In May 1996, the Company executed two license agreements with The Dow
          Chemical Company ("Dow"), whereby the Company was granted an exclusive
          license to technology (including the right to sublicense) covered by
          patents held by Dow. In exchange, the Company issued Dow 124,805
          shares of common stock valued at $2 million. The Company agreed to
          make payments to Dow following achievement of certain development and
          commercial milestones by the Company. In addition, if the Company
          sublicenses the technology, the Company must pay Dow a certain
          percentage of all payments received by the Company. A portion of the
          technology was used in the Company's RIGS research and development
          initiatives. Accordingly, the $500,000 allocated to this portion of
          the technology was recorded as research and development expense in
          1996. During 1997, the Company determined that due to specific
          clinical development achievements of competing technology, $500,000 of
          the cost of this technology should be expensed as research and
          development costs. At December 31, 1997, approximately $1 million was
          included in intangible assets related to this technology assets with
          alternative future uses. During the fourth quarter of 1998, the
          Company determined, based on analysis of product failures for similar
          technologies and unsuccessful attempts to market the technology to
          other parties, that the remaining value of the technology



                                      F-24
<PAGE>   73
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

          was impaired. Accordingly, the Company recorded an impairment charge
          of $1 million which was included in research and development for the
          year ended December 31, 1998.

     e.   EMPLOYMENT: The Company has an employment agreement through June 30,
          2000 with one executive officer which provides for restricted stock
          purchase agreements. The agreement provides that the officer is
          entitled to receive up to an aggregate of 110,000 shares of the
          Company's common stock at par value subject to vesting provisions.
          Vesting of the shares does not commence unless there is a change in
          control of the Company, or under certain conditions of termination as
          defined in the agreement. Of the unvested portion of the restricted
          shares, 30,000 shares, 45,000 shares, and 35,000 shares will be
          forfeited no later than June 4, 2006, May 20, 2008 and April 23, 2009,
          respectively. The Company has not recognized any expense under the
          agreement due to the contingent nature of the vesting provision and
          the risk of forfeiture.

13.  LEASES:

     The Company leases certain office and manufacturing equipment under capital
     leases which expire on various dates through 2002. In December 1996, the
     Company entered into a seventy-seven month operating lease agreement for
     office space, commencing April 1, 1997.

     The future minimum lease payments, net of sublease rental income, for the
     years ending December 31 are as follows:

<TABLE>
<CAPTION>
                                                            CAPITAL               OPERATING
                                                             LEASES                LEASES
                                                        -----------------    --------------------

<S>                                                            <C>                    <C>
                 2000                                          $  91,301              $  205,129
                 2001                                             56,590                 182,668
                 2002                                             14,148                 177,201
                 2003                                                  -                 119,417
                                                        -----------------    --------------------
                                                                 162,039              $  684,415
                                                                             ====================
                 Less amount representing
                   interest                                        6,223
                                                        -----------------
                 Present value of net minimum
                   lease payments                              $ 155,816
                 Less current portion                             87,007
                                                        -----------------
                 Capital lease obligations,
                   excluding current portion                   $  68,809
                                                        =================
</TABLE>

     The Company expects rental income from subleases of $65,400, $67,712,
     $70,652, and $48,291 in 2000 through 2003, respectively, based on two
     subleases executed in December 1998 and February 1999. Total rental expense
     was approximately $200,000, $529,000, and $660,000 for the years ended
     December 31, 1999, 1998, and 1997, respectively.

14.  EMPLOYEE BENEFIT PLAN:

     The Company maintains an employee benefit plan under Section 401(k) of the
     Internal Revenue Code. The plan allows employees to make contributions and
     the Company may, but is not obligated to, match a portion of the employee's
     contribution with the Company's common stock, up to a defined maximum. The
     Company accrued expenses of approximately $23,900, $41,600, and $57,300
     during 1999, 1998, and 1997, respectively related to common stock to be
     subsequently contributed to the plan.

15.  SUPPLEMENTAL DISCLOSURE FOR STATEMENTS OF CASH FLOWS:

     The Company paid interest, net of amounts capitalized, aggregating $82,617,
     $129,874 and $62,653 for the years ended December 31, 1999, 1998, and 1997,
     respectively.



                                      F-25
<PAGE>   74
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS

     During the fourth quarter of 1999, in connection with the retirement of the
     Series B preferred stock and Class L warrants (See Note 7(a).), the Company
     recorded a non-cash reclassification of amounts related to the Series B
     preferred stock and accrued dividends (cumulatively, $3.7 million) to
     current portion of obligation to preferred stockholder ($2.5 million) and
     obligation to preferred stockholder ($1.2 million). Also during the fourth
     quarter of 1999, in connection with the deconsolidation of Neoprobe Israel
     (See Note 9.), the Company recorded an adjustment which removed $993,000 in
     both cash and related accrued liability from the Company's balance sheet.
     During 1998, a note receivable was converted into common stock in XTL (See
     Note 12(d).). The Company also incurred capital lease obligations of
     approximately $455,000 in 1997 to finance equipment.

16.  CONTINGENCIES:

     Pursuant to the Company's decision to liquidate Neoprobe Israel, management
     of the Company believes Neoprobe Israel may be subject to claims from the
     State of Israel, a bank, and various vendors (collectively, the
     "Creditors"). The Company believes its only contractual obligation related
     to Neoprobe Israel relates to the limited amount guarantee which is fully
     secured with the bank (See Note 10(b).). However, it is possible that the
     Company may be subject to additional claims related to Neoprobe Israel.
     Management does not believe, based on advice from counsel, that such claims
     would have a material adverse affect on the Company's financial position or
     results of operations.

     The Company is subject to legal proceedings and claims which arise in the
     ordinary course of its business. In the opinion of management, the amount
     of ultimate liability with respect to these actions will not materially
     affect the financial position of the Company.

17.  LIQUIDITY:

     The Company has experienced significant operating losses in each year since
     inception, and had an accumulated deficit of approximately $120 million as
     of December 31, 1999. For the years ended December 31, 1999, 1998, and
     1997, the Company's net losses were $4 million, $28 million, and $23
     million, respectively. As a result of these net losses, the Company has a
     stockholders' deficit of approximately $140,000 at December 31, 1999. The
     Company expects to achieve operating profitability for 2000 based on
     forecast, but not fully committed, purchases of products from the Company
     by EES. As of December 31, 1999, the Company had cash and cash equivalents
     of $4.9 million available to finance its operating activities. The Company
     believes its available cash balance, coupled with cash flow expected to be
     generated from operations, should be adequate to finance its operations for
     the forseeable future.

18.  SUBSEQUENT EVENTS:

     a.   RETIREMENT OF SERIES B PREFERRED STOCK: On January 20, 2000, the
          Company executed a definitive Settlement Agreement with the Series B
          holders to retire the 30,000 shares of Series B preferred stock issued
          in February 1999. In addition to retiring the preferred shares, the
          Series B holders returned the Class L warrants issued in connection
          with the Series B and the placement agent returned the UPOs. In
          exchange for the retirement of the Series B preferred shares and
          surrendering the Class L warrants and UPOs, the Company paid the
          Series B holders $2.5 million and issued the Series B holders 3
          million shares of common stock and 3 million warrants to purchase
          common stock with an exercise price of $0.74 per share.

          The transaction will be reported in the Company's first quarter 2000
          financial statements and be measured based on the market price of the
          Company's common stock as of the execution of the definitive agreement
          (i.e., $0.59 per share). As a result, the Company expects to reflect a
          loss on the retirement of the preferred shares of $1.2 million below
          net income in its calculation of earnings per share during the first
          quarter of 2000. This amount represents the value of the cash given up
          plus the market value of the stock issued and the estimated market
          value of the warrants issued as valued on January 20, 2000 less the
          previously recorded book value of the Series B preferred stock and
          warrants.

     b.   SALE OF INVESTMENT IN XTL: On January 19, 2000, the Company sold its
          equity interest in XTL to a third party for $1.5 million. The Company
          recorded no gain or loss associated with this transaction.

                                      F-26
<PAGE>   75

     c.   MANUFACTURING AND SUPPLY AGREEMENT: In March 2000, the Company entered
          into a manufacturing and supply agreement with Plexus for the
          exclusive manufacture of the Company's 14mm probe and neo2000 control
          unit. The original term of the agreement expires on December 31, 2003
          but may be extended for an additional year given six months notice
          prior to December 31, 2003. The Company has the right to terminate the
          agreement upon six months written notice. The agreement may be
          terminated by either party in the event of material breach or
          insolvency, or by the Company in the event of failure to supply. The
          Company may also have the covered product manufactured by other
          suppliers in the event of failure to supply or if the Company is able
          to secure another source of supply with significantly more favorable
          pricing terms than those offered by Plexus. The agreement calls for
          the Company to deliver rolling 12-month product forecasts to Plexus
          and to place purchase orders 60 days prior to requested delivery in
          accordance with the forecast. In the event the agreement is terminated
          by Neoprobe or if Plexus ceases to be the exclusive supplier of the
          covered products, the Company is required to purchase all finished
          components on hand at Plexus plus raw materials not able to be
          restocked with suppliers.




                                      F-27
<PAGE>   76
================================================================================



                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                             -----------------------


                              NEOPROBE CORPORATION


                             -----------------------


                             FORM 10-K ANNUAL REPORT


                           FOR THE FISCAL YEAR ENDED:

                                DECEMBER 31, 1999


                             -----------------------

                                    EXHIBITS

                             -----------------------



================================================================================
<PAGE>   77
<TABLE>
                                                      EXHIBIT INDEX
                                                      -------------

<CAPTION>
         EXHIBIT                                                                 NUMBER OF PAGES             PAGE IN MANUALLY
         NUMBER                            DESCRIPTION                         IN ORIGINAL DOCUMENT+          SIGNED ORIGINAL
<S>               <C>                                                          <C>                              <C>
         3.1.     Complete Restated Certificate of Incorporation of Neoprobe
                  Corporation, as corrected and as amended                             25                            *
                                                                                      ----

         3.2.     Amended and Restated By-Laws, as amended                             15                            *
                                                                                      ----

         4.1.     See Articles FOUR, FIVE, SIX and SEVEN of the Restated
                  Certificate of Incorporation of Registrant                           25                            *
                                                                                      ----

         4.2.     See Articles II and VI and Section 2 of Article III and
                  Section 4 of Article VII of the Amended and Restated By-Laws
                  of the Registrant                                                    13                            *
                                                                                      ----

         4.3.     Rights Agreement dated as of July 18, 1995 between the
                  Registrant and Continental Stock Transfer & Trust Company.           47                            *
                                                                                      ----

         4.4.     Amendment Number 1 to the Rights Agreement between the
                  Registrant and Continental Stock Transfer & Trust Company
                  dated February 16, 1999.                                              3                            *
                                                                                      ----
   10.1.1.--10.1.24. Reserved

         10.1.25. Rights Agreement between the Registrant and Continental Stock
                  Transfer & Trust Company dated as of July 18, 1995.                  47                            *
                                                                                      ----

  10.1.26.--10.1.30. Reserved                                                           18                            *
                                                                                      ----

         10.1.31. Amendment Number 1 to the Rights Agreement between the
                  Registrant and Continental Stock Transfer & Trust Company
                  dated February 16, 1999.                                              3                            *
                                                                                      ----

         10.1.32. Preferred Stock and Warrant Purchase Agreement dated February
                  16, 1999 among the Registrant, The Aries Master Fund, a Cayman
                  Island exempted company, and The Aries Domestic Fund, L.P.           44                            *
                                                                                      ----

         10.1.33. Warrant dated February 16, 1999 for the purchase of shares to
                  purchase Common Stock issued to The Aries Master Fund, a
                  Cayman Island exempted company. This exhibit is one of two
                  substantially identical instruments and is accompanied by a
                  schedule identifying the other instrument omitted and setting
                  forth the material details in which such instrument differs
                  from the one filed herewith.                                         11                            *
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial owner
of its securities or to any person from whom a proxy was solicited in connection
with the Registrant's most recent Annual Meeting of Stockholders upon the
payment of a fee of fifty cents ($.50) a page.

*        Incorporated by refernce.
<PAGE>   78
<TABLE>
<CAPTION>
<S>      <C>                                                                     <C>                        <C>
         10.1.34. Option Units dated February 16, 1999 for the purchase of
                  shares of 5% Series B Convertible Preferred Stock of the
                  Registrant and warrants to purchase shares of Common Stock
                  issued to Paramount Capital, Inc.                                    15                            *
                                                                                      ----

         10.1.35. Financial Advisory Agreement dated February 16, 1999 between
                  the Registrant and Paramount Capital, Inc.                            8                            *
                                                                                      ----

         10.1.36  Letter agreement dated February 24, 1999 among the Registrant,
                  The Aries Master Fund, a Cayman Island Exempted Company and
                  The Aries Domestic Fund, L.P.                                         2                            *
                                                                                      ----

         10.1.37. Letter agreement dated March 12, 1999 among the Registrant,
                  The Aries Master Fund, a Cayman Island Exempted Company and
                  The Aries Domestic Fund, L.P.                                         2                            *
                                                                                      ----

         10.1.38  Letter Agreement dated April 1, 1999 among the Registrant, The
                  Aries Master Fund, a Cayman Island Exempted Company, and The
                  Aries Domestic Fund, L.P.                                             3                            *
                                                                                      ----

    10.2.1.--10.2.14. Reserved

         10.2.15. Option Agreements between the Registrant and David C. Bupp           17                            *
                                                                                      ----

   10.2.16.--10.2.17. Reserved

         10.2.18. Non-Qualified Stock Option Agreement dated May 3, 1993 between
                  the Registrant and David C. Bupp                                      4                            *
                                                                                      ----

   10.2.19.--10.2.22. Reserved

         10.2.23. Non-Qualified Stock Option Agreement dated February 28, 1992
                  and amended and restated June 3, 1993 between the Registrant
                  and David C. Bupp                                                     4                            *
                                                                                      ----

         10.2.24. Non-Qualified Stock Option Agreement dated July 1, 1990 and
                  amended and restated June 3, 1993 between the Registrant and
                  David C. Bupp                                                         4                            *
                                                                                      ----

         10.2.25. Non-Qualified Stock Option Agreement dated June 1, 1992 and
                  amended and restated June 3, 1993 between the Registrant and
                  John L. Ridihalgh                                                     4                            *
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial owner
of its securities or to any person from whom a proxy was solicited in connection
with the Registrant's most recent Annual Meeting of Stockholders upon the
payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.
<PAGE>   79
<TABLE>
<CAPTION>
<S>      <C>                                                                    <C>                      <C>
         10.2.26. Amended and Restated Stock Option and Restricted Stock
                  Purchase Plan dated March 3, 1994                                    11                            *
                                                                                      ----
   10.2.27.--10.2.28. Reserved.

         10.2.29. Non-Qualified Stock Option Agreement dated February 16, 1995
                  between the Registrant and John L. Ridihalgh                          3                            *
                                                                                      ----

         10.2.30. Non-Qualified Stock Option Agreement dated February 16, 1995
                  between the Registrant and David C. Bupp                              3                            *
                                                                                      ----

   10.2.31.--10.2.33 Reserved.

         10.2.34. Restricted Stock Purchase Agreement dated June 5, 1996 between
                  the Registrant and John L. Ridihalgh                                  4                            *
                                                                                      ----

         10.2.35. Restricted Stock Purchase Agreement dated June 5, 1996 between
                  the Registrant and David C. Bupp                                      4                            *
                                                                                      ----

         10.2.36. Reserved.

         10.2.37. 1996 Stock Incentive Plan dated January 18, 1996 as amended
                  March 13, 1997                                                       21                            *
                                                                                      ----

         10.2.38. Reserved.

         10.2.39. Non-Qualified Stock Option Agreement dated January 18, 1996
                  between the Registrant and David C. Bupp                              3                            *
                                                                                      ----

         10.2.40. Reserved.

         10.2.41. Non-Qualified Stock Option Agreement dated February 3, 1997
                  between the Registrant and David C. Bupp                              3                            *
                                                                                      ----

         10.2.42. Reserved.

         10.2.43. Agreement, Release, and Waiver dated February 23, 1998 between
                  the Registrant and Dr. William Eisenhardt.                            7                            *
                                                                                      ----

         10.2.44. Employment Agreement dated as of January 1, 1998 between the
                  Registrant and David C. Bupp.                                         7                            *
                                                                                      ----

         10.2.45. Restricted Stock Purchase Agreement between David C. Bupp and
                  the Registrant dated May 20, 1998.                                    3                            *
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial owner
of its securities or to any person from whom a proxy was solicited in connection
with the Registrant's most recent Annual Meeting of Stockholders upon the
payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.

<PAGE>   80
<TABLE>
<S>      <C>                                                                          <C>                          <C>
         10.2.46. Waiver by David Bupp dated February 16, 1999 of certain
                  provisions in the employment agreement between the Registrant
                  and David C. Bupp dated January 1, 1998.                              1                            *
                                                                                      ----

         10.2.47. Severance Agreement dated October 23, 1998 between the
                  Registrant and Matthew F. Bowman. This agreement is one of
                  three substantially identical agreements and is accompanied by
                  a schedule identifying the other agreements omitted and
                  setting forth the material details in which such documents
                  differ from the one that is filed herewith.                           4                            *
                                                                                      ----

         10.2.48. Restricted Stock Agreement dated October 23, 1998 between the
                  Registrant and Matthew F. Bowman. This agreement is one of
                  three substantially identical agreements and is accompanied by
                  a schedule identifying the other agreements omitted and
                  setting forth the material details in which such documents
                  differ from the one that is filed herewith.                           4                            *
                                                                                      ----

         10.2.49. Separation Agreement dated October 21, 1998 between the
                  Registrant and John L. Ridihalgh.                                     9                            *
                                                                                      ----

         10.2.50. Restricted Stock Agreement dated April 30, 1999 between the
                  Registrant and David C. Bupp. This Agreement is one of three
                  substantially identical agreements and is accompanied by a
                  schedule identifying the other agreements omitted and setting
                  forth the material details in which such agreements differ
                  from the one that is filed herewith.                                  5                            *
                                                                                      ----

         10.2.51. Employment Agreement between the Registrant and David C. Bupp
                  dated July 1, 1999.                                                   8                            *
                                                                                      ----

         10.2.52. Severance Agreement dated November 30, 1999 between the
                  Registrant and Patricia Coburn.                                       5                           47
                                                                                      ----

         10.3.1.  Technology Transfer Agreement dated July 29, 1992 between the
                  Registrant and The Dow Chemical Corporation (subject to an
                  order granting portions thereof confidential treatment).             15                            *
                                                                                      ----

    10.3.2.--10.3.29. Reserved.

         10.3.30. Facility Agreement dated July 17, 1995 among Registrant,
                  Neoprobe (Israel) Ltd., and Rotem Industries, Ltd. (subject to
                  an order granting portions thereof confidential treatment)           12                            *
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial
owner of its securities or to any person from whom a proxy was solicited in
connection with the Registrant's most recent Annual Meeting of Stockholders upon
the payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.
<PAGE>   81
<TABLE>
<S>      <C>                                                                         <C>                           <C>
         10.3.31. Cooperative Research and Development Agreement between
                  Registrant and National Cancer Institute                             67                            *
                                                                                      ----

         10.3.32. First Amendment to Facility Agreement dated July 17, 1995
                  among Registrant, Neoprobe (Israel), Ltd. and Rotem
                  Industries, Ltd.                                                      1                            *
                                                                                      ----

         10.3.33.--10.3.34. Reserved.

         10.3.35. Investors' Rights Agreement dated February 5, 1996 between
                  Registrant and XTL Biopharmaceuticals, Ltd                           19                            *
                                                                                      ----

         10.3.36. Reserved.

         10.3.37. Research and Development Agreement dated February 13, 1996
                  between Registrant and XTL Biopharmaceuticals, Ltd. (subject
                  to an order granting portions thereof confidential treatment)        14                            *
                                                                                      ----

         10.3.38. Sublicense Agreement dated February 13, 1996 between
                  Registrant and XTL Biopharmaceuticals, Ltd. (subject to an
                  order granting portions thereof confidential treatment)               8                            *
                                                                                      ----

         10.3.39.--10.3.44. Reserved.

         10.3.45. License dated May 1, 1996 between Registrant and The Dow
                  Chemical Company                                                      9                            *
                                                                                      ----

         10.3.46. License Agreement dated May 1, 1996 between Registrant and The
                  Dow Chemical Company(subject to an order granting portions
                  thereof confidential treatment)                                      27                            *
                                                                                      ----

         10.3.47. License and Option Agreement between Cira Technologies, Inc.
                  and Neoprobe Corporation dated April 1, 1998.                        32                            *
                                                                                      ----

         10.3.48. Restated Subscription and Option Agreement between the
                  Registrant, Cira Technologies, Inc., Richard G. Olsen, John L.
                  Ridihalgh, Richard McMorrow, James R. Blakeslee, Mueller &
                  Smith, Ltd., Pierre Triozzi and Gregory Noll, dated April 17,
                  1998.                                                                12                            *
                                                                                      ----

         10.3.49. Restated Stockholders Agreement with the Registrant, Cira
                  Technologies, Inc., Richard G. Olsen, John L. Ridihalgh,
                  Richard McMorrow, James R. Blakeslee, Mueller & Smith, Ltd.,
                  Pierre L. Triozzi and Gregory Noll, dated April 17, 1998.             5                             *
                                                                                      ----

         10.4.1.--10.4.15. Reserved
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial
owner of its securities or to any person from whom a proxy was solicited in
connection with the Registrant's most recent Annual Meeting of Stockholders upon
the payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.

<PAGE>   82
<TABLE>
<S>      <C>                                                                         <C>                       <C>
         10.4.16. Project Management Agreement dated May 17, 1995 between
                  Neoprobe (Israel) Ltd. and BARAN Project Construction Ltd.            6                            *
                                                                                      ----

         10.4.17.--10.4.21. Reserved.

         10.4.22. Sales and Marketing Agreement dated April 21, 1998 between the
                  Registrant and Ethicon Endo-Surgery, Inc., an Ohio corporation
                  (subject to an order granting portions thereof confidential
                  treatment)                                                           13                            *
                                                                                      ----

         10.4.23. Loan Agreement between the Registrant and Bank One, NA, dated
                  April 16, 1998 (incorporated by reference to Exhibit 10.4.23
                  to the 2nd Quarter 1998 Form 10-Q).                                  13                            *
                                                                                      ----

         10.4.24. Variable Rate Cognovit Promissory Note, dated April 16, 1998,
                  issued by Registrant to Bank One, NA.                                10                            *
                                                                                      ----

         10.4.25. Security Agreement between the Registrant and Bank One, NA,
                  dated April 16, 1998.                                                 5                            *
                                                                                      ----

         10.4.26. Letter amendment dated October 14, 1998 to the Sales and
                  Marketing Agreement dated April 21, 1998 between the
                  Registrant and Ethicon Endo-Surgery, Inc., an Ohio corporation
                  (subject to an order granting portions thereof confidential
                  treatment)                                                            2                            *
                                                                                      ----

         10.4.27. Promissory Note, dated September 25, 1998, issued by
                  Registrant to Bank One, NA.                                           2                            *
                                                                                      ----

         10.4.28. Addendum to Promissory Note dated September 25, 1998 issued by
                  Registrant to Bank One, NA.                                           6                            *
                                                                                      ----

         10.4.29. Covenant Agreement dated September 25, 1998 between the
                  Registrant and Bank One, NA.                                          3                            *
                                                                                      ----

         10.4.30. Assignment of Deposit Account dated September 25, 1998 between
                  Registrant and Bank One, NA.                                          4                            *
                                                                                      ----

         10.4.31. Asset Purchase Agreement dated October 14, 1998 between the
                  Registrant, Neoprobe AB, a corporation organized and existing
                  under the laws of Sweden, and Bioinvent Production AB, a
                  corporation organized and existing under the laws of Sweden.          8                            *
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial
owner of its securities or to any person from whom a proxy was solicited in
connection with the Registrant's most recent Annual Meeting of Stockholders upon
the payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.

<PAGE>   83
<TABLE>
<S>      <C>                                                                         <C>                      <C>
         10.4.32. Supply Agreement between the Registrant and eV Products dated
                  December 8, 1997 (filed pursuant to Rule 24b-2 under which the
                  Registrant has requested confidential treatment of certain
                  portions of this Exhibit).                                           17                            *
                                                                                      ----

         10.4.33. Sales and Marketing Agreement dated February 1, 1999 between
                  the Registrant and KOL Bio Medical Instruments, Inc. (subject
                  to an order granting portions thereof confidential treatment).       20                            *
                                                                                      ----

         10.4.34. Revolving Credit Note between the Registrant and The Provident
                  Bank dated August 31, 1999.                                          13                            *
                                                                                      ----

         10.4.35. Tennessee Revolving Credit Agreement between the Registrant
                  and The Provident Bank dated August 31, 1999.                        11                            *
                                                                                      ----

         10.4.36. Security Agreement between the Registrant and The Provident
                  Bank dated August 31, 1999.                                          13                            *
                                                                                      ----

         10.4.37. Termination Agreement between the Registrant and Kol
                  Bio-Medical Instruments, Inc. dated October 1, 1999 (subject
                  to an order granting portions thereof confidential treatment).       13                            *
                                                                                      ----

         10.4.38. Amendment to Termination Agreement between the Registrant and
                  Kol Bio-Medical Instruments, Inc. dated October 1, 1999
                  (subject to an order granting portions thereof confidential
                  treatment).                                                           2                            *
                                                                                      ----

         10.4.39. Distribution Agreement between the Registrant and Ethicon
                  Endo-Surgery, Inc. dated October 1, 1999 (subject to an order
                  granting portions thereof confidential treatment).                   48                            *
                                                                                      ----

         10.4.40. Amended and Restated Revolving Credit Note between the
                  Registrant and The Provident Bank dated December 31, 1999.           13                           52
                                                                                      ----

         10.4.41. Tennessee Revolving Credit Note between the Registrant and The
                  Provident Bank dated December 31, 1999.                              13                           65
                                                                                      ----

         10.4.42  Amended and Restated Security Agreement between the Registrant
                  and The Provident Bank dated December 31, 1999                       14                           78
                                                                                      ----

         10.4.43  Amendment No. 1 to Amended and Restated Revolving Credit Note
                  dated March 2, 2000                                                   2                           92
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial
owner of its securities or to any person from whom a proxy was solicited in
connection with the Registrant's most recent Annual Meeting of Stockholders upon
the payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.

<PAGE>   84
<TABLE>
<S>      <C>                                                                         <C>                           <C>
         10.4.44  Amendment No. 1 to Tennessee Revolving Credit Note dated as of
                  March 2, 2000                                                         2                           94
                                                                                      ----

         11.1.    Computation of Net Loss Per Share                                     1                           95
                                                                                      ----

         21.1.    Subsidiaries of Registrant                                            1                           96
                                                                                      ----

         23.1.    Consent of PricewaterhouseCoopers LLP                                 1                           97
                                                                                      ----

         23.2     Consent of KPMG LLP                                                   1                           98
                                                                                      ----

         24.1.    Powers of Attorney                                                    8                           99
                                                                                      ----

         24.2.    Certified resolution of the Registrant's Board of Directors
                  authorizing officers and directors signing on behalf of the
                  Company to sign pursuant to a power of attorney                       1                          107
                                                                                      ----
</TABLE>

- ----------
+        The Registrant will furnish a copy of any exhibit to a beneficial
owner of its securities or to any person from whom a proxy was solicited in
connection with the Registrant's most recent Annual Meeting of Stockholders upon
the payment of a fee of fifty cents ($.50) a page.

*        Incorporated by reference.

<PAGE>   1
                                                                 Exhibit 10.2.52

                               SEVERANCE AGREEMENT

THIS SEVERANCE AGREEMENT (the "Agreement") is a contract between the undersigned
employee ("Employee") who is being involuntarily and without cause, separated
from employment on November 30, 1999 (the "Effective Date of Termination) and
her employer, Neoprobe Corporation ("Neoprobe") hereinafter collectively
referred to as the "Parties",

WHEREAS, Neoprobe is eliminating substantially all in-house sales and marketing
activities and as a result Employee's job is affected

WHEREAS, the Parties desire to fully and completely settle and dispose of any
and all claims of whatever kind or nature which Employee ever had, may now have
or may hereafter have against Neoprobe, whether known or unknown;

NOW THEREFORE, the Parties hereto agree as follows:

1. Benefits. In consideration for signing this Agreement, Employee will receive
the following benefits (the "Severance Benefits").

A. Severance Pay. Neoprobe agrees to pay Employee a lump sum payment of $
105,000 which is equal to nine (9) months plus three weeks based on Employee's
current annual base salary rate. Unless otherwise instructed by Employee, this
amount shall be paid on December 15, 1999.

B. Neoprobe Property. Employee shall be entitled to keep as her property and to
remove such property from the premises of Neoprobe, the following items: desk
chair and legal books belonging to Neoprobe located in Employee's former office
and the "Personal Computer" provided to Employee by Neoprobe, provided that
Employee certifies in writing to Neoprobe that Employee has deleted all
confidential and proprietary Neoprobe information according to instructions
provided to Employee by Neoprobe. Once Neoprobe receives the certification, the
computer shall not be considered .'Neoprobe property" within the meaning of
Paragraph 10(ii) below. As used herein the term "Personal Computer" means the
CPU, Monitor, Key Board and Mouse. Employee and Neoprobe shall mutually agree to
the timing of the removal of the above-described items from the premises of
Neoprobe.

2. Health & Dental Benefits. Employee acknowledges receipt of notice of her
right to elect continued health care coverage in accordance with the provisions
of the federal Consolidated Omnibus Budget & Reconciliation Act, as amended
("COBRA"). In the event that Employee exercises her COBRA right to continue
coverage under Neoprobe's group health insurance policy, Neoprobe agrees to
continue to pay a portion of the premiums for such coverage in the amount of
$180.50 per month through August 31, 2000. Employee's portion of the premiums
will be $25.00 per month during this period. Subject to the application of
Section 5, thereafter, if Employee wishes to continue such coverage for the
remaining nine (9) month COBRA period, Employee must do so completely at her own
expense.
<PAGE>   2
3. Life Insurance. Employee's coverage under Neoprobe's life insurance plan
shall continue for eighteen ( 18) months after the Effective Date of Termination
and Employee may have the right to convert such coverage to an individual plan
if provided for under, and in accordance with, the terms of, such plan.

4. Chance of Control Severance. Employee is entitled to receive additional
severance benefits as follows:

a) In the event of a "Change of Control" (as that term is defined in the
Severance Agreement dated October 23, 1998, a copy of which is attached as
Exhibit A) of Neoprobe occurs within six (6) months after the Effective Date of
Termination, employee shall be entitled to receive an additional severance
payment of $97,500 equal to nine (9) months of her annual base salary as of the
Effective Date of Termination; or

b) In the event a "Change of Control" of Neoprobe occurs during the period
running from six (6) months after the Effective Date of Termination and ending
twelve (12) months after the Effective Date of Termination, and the controlling
"Person" is a Person listed on Exhibit B attached hereto and incorporated
herein, Employee shall be entitled to receive an additional severance payment of
$97,500, equal to nine (9) months of her annual base salary as of the Effective
Date of Termination. For the purposes of this Paragraph 3(b) the term "Person"
means any person within the meaning of Paragraph 13( d) of the Securities
Exchange Act of 1934.

Unless otherwise agreed to by the Parties, the severance payment described in
this Paragraph 4 shall be paid in a lump sum within fifteen (15) days of the
closing of the Change of Control event. Any Change of Control transaction
committed to during the period described in Paragraph 4(a) or 4(b) and which is
completed within four (4) months thereafter shall be considered to be within the
applicable period stated in this Paragraph 4. As an example, if a Change of
Control transaction described in Paragraph 4(a) is committed to on March 1, 2000
but does not close until August 31, 2000, Employee will be entitled to receive
the severance payment specified in Paragraph 4(a). If a Change of Control
transaction described in Paragraph 4(b) is committed to on October 31, 2000 but
does not close until February 1, 2001, Employee will be entitled to receive the
severance payment specified in Paragraph 4(b) .

5. Change of Control Health Benefits. In the event of a Change of Control of
Neoprobe as described in Paragraph 4 above, for a period of nine (9) months,
which is in addition to the nine (9) month period described in paragraph 3
above, Employee shall be eligible to continue to participate in the health and
dental insurance programs of Neoprobe or participate in the health and dental
insurance programs of the controlling Person on the same terms and conditions
(including payments) as are then prevailing for the Company's (or the
controlling Person's) employees who have the same level of salary and tenure as
Employee did when her employment was terminated .

6. 401 (k) Plan. Employee shall receive all monies to which Employee is entitled
under Neoprobe 401 (k) Plan in accordance with the terms thereof.
<PAGE>   3
7. Unemployment Benefits. Neoprobe agrees not to contest any claim for
unemployment benefits, which Employee might file as a result of Employee's
separation from Neoprobe on November 30, 1999. However, Neoprobe expressly
waives any commitment that it is warranting or guaranteeing Employee's receipt
of such unemployment benefits inasmuch as that determination is solely within
the province of the Ohio Bureau of Employment Services.

8. Stock Options. Employee shall be eligible to exercise any stock options to
which Employee may be entitled under the Neoprobe Stock Purchase Plan in
accordance with the terms thereof .

9. Insurance. Employee's coverage under Neoprobe's disability insurance plan
shall terminate as of November 30, 1999, and Employee may have the right to
convert such coverage to an individual plan if provided for under, and in
accordance with, the terms of, such plan.

10. Release. In consideration for the Severance Benefits specified in Paragraph
1 above as well as the other benefits set forth herein, Employee agrees to
execute the General Release attached hereto as Exhibit C and to deliver it to
Neoprobe on or before December 15, 1999.

11. Return of Neoprobe Property. Whether or not Employee signs this Agreement,
she as a terminating employee, is reminded that she must return to Neoprobe, (i)
all Neoprobe documents, and other tangible items, and any copies, that are in
Employee's possession or control and which contain confidential information in
written, magnetic or other form and shall have not given such documents, items,
or copies to anyone other than another Neoprobe employee; and (ii) subject to
the provisions of Paragraph 1 (8) herein, all other Neoprobe property within
Employee's possession including, but not limited to, office keys, identification
badges or passes, Neoprobe credit cards, and computer equipment and software.

12. Neoprobe Proprietary Information Agreement. Whether or not Employee signs
this Agreement, as a terminating employee, she is reminded that the Proprietary
Information Agreement (the "Proprietary Agreement") entered into between
Neoprobe and Employee remains in full force and effect after termination of her
employment. Under the Proprietary Agreement, Employee has a continuing
obligation to maintain the confidentiality of all confidential, proprietary and
trade secret information which Employee obtained during her employment with
Neoprobe.

13. Duty of Confidentiality. Employee recognizes that Neoprobe possesses certain
business and financial information about its operations, information about new
or envisioned products or services, manufacturing methods, product research,
product specifications, records, plans, prices, costs, customer lists, concepts
and ideas, and is the owner of proprietary rights in certain systems, methods,
processes, procedures, technical and non-technical information, inventions,
machinery, research and other things which constitute valuable trade secrets of
Neoprobe. Employee acknowledges that she has been employed in positions in which
she has had access to such information and that Neoprobe has a legitimate
interest in protecting such confidential and proprietary information in order to
maintain and enhance a competitive edge within its industry. Accordingly,
Employee agrees that she will not use or remove, duplicate or disclose, directly
or indirectly, to any persons or entities outside Neoprobe any information,
property, trade secrets or other things of value which have not been publicly
disclosed. In the event that Employee is requested or required in a judicial,
administrative or governmental proceeding to disclose any
<PAGE>   4
information that is the subject matter of this Paragraph 13, she will provide
Neoprobe with prompt written notice of such request and all related proceedings
so that Neoprobe may seek an appropriate protective order or remedy or, as soon
as practicable, waive Employee's compliance with the provisions of this
Paragraph 13. Employee acknowledges that she has carefully considered the nature
and extent of the restrictions upon her and the rights and remedies conferred to
Neoprobe under this Paragraph 13 and hereby agrees that the same are reasonably
designed to eliminate competition which otherwise would be unfair to Neoprobe,
do not stifle the inherent skill and experience of Employee, would not operate
as a bar to Employee's sole means of support, are fully required to protect the
legitimate interests of Neoprobe and do not confer a benefit upon Neoprobe
disproportionate to the detriment to Employee.

14. Breach. Employee agrees that if she violates any part of this Agreement or
her Proprietary Agreement, Employee will not be entitled to the Severance
Benefits described herein. Employee further agrees that any breach or threatened
breach by her of this Agreement cannot be remedied solely by the recovery of
damages and Neoprobe shall therefore be entitled to an injunction against such
breach or threatened breach without posting any bond or other security. Nothing
herein, however, shall be construed as prohibiting Neoprobe from pursuing all
its available rights, in law or equity for such breach or threatened breach,
including the recovery of damages.

15. Confidentiality of this Agreement. Employee agrees that she will not reveal
the existence of this Agreement, nor any terms thereof, to any person, entity,
or organization, except to her immediate family, to her attorney, or as may be
required by law. Neoprobe agrees that it will not reveal the existence of this
Agreement, nor any terms thereof, to any person, entity, or organization, except
to employees of Neoprobe who have a need to know or as may be required by law.

16. PERIOD OF REVIEW AND OTHER CONSIDERATIONS.

         A. Date of Receipt. Employee acknowledges that she received this
Agreement on or prior to November 30, 1999.

         B. Attorney Consultation. Employee acknowledges that she has had the
opportunity to consult an attorney of her choice concerning this Agreement.

         C. Period of Review. Employee acknowledges that she has been given at
least 21 days in which to review and consider signing this Agreement. In the
event Employee executes this Agreement within less than 21 days of the date of
its delivery to her, Employee acknowledges that such decision was entirely
voluntary and that she has had the opportunity to consider this Agreement for
the entire 21-day period but decided to waive that opportunity .

         D. Entire Aqreement. This Agreement sets forth the entire agreement
between Neoprobe and Employee as to the matters set forth herein and supersedes
and renders null and void any and all prior or contemporaneous oral or written
understandings, statements, representations or promises, including the Severance
Agreement dated October 23, 1998 attached as Exhibit B. This Agreement does not,
however, supersede the Proprietary Information Agreement, which remains in full
force and effect.
<PAGE>   5
         E. Governing Law. This Agreement shall be construed and governed by the
laws of the State of Ohio and adjudicated within the exclusive jurisdiction of
the courts having jurisdiction over, Franklin County, Ohio.

         WHEREFORE, the parties have read all of the foregoing, understand the
same, and agree to all of the provisions contained herein.

NEOPROBE CORPORATION                                 EMPLOYEE

By:  /s/ David C. Bupp                         By:  Patricia A. Coburn
     ----------------------                         ----------------------
         David C. Bupp                              Patricia A. Coburn

Dated:  December 8, 1999                       Dated:  7 December, 1999
      ----------------------                         ----------------------


<PAGE>   1
                                                                 Exhibit 10.4.40


                   AMENDED AND RESTATED REVOLVING CREDIT NOTE


================================================================================
                                                                  COLUMBUS, OHIO
$400,000                                                       DECEMBER 31, 1999
================================================================================


         FOR VALUE RECEIVED, the undersigned, NEOPROBE CORPORATION, a Delaware
corporation, whose address is 425 Metro Place North, Suite 400, Dublin, Ohio
43017 (the "Borrower"), hereby promises to pay to the order of THE PROVIDENT
BANK, an Ohio banking corporation (the "Bank"), on or before February 29, 2000
(the "Maturity Date"), the principal sum of Four Hundred Thousand Dollars
($400,000) or, if such principal is less, the aggregate unpaid principal amount
of all loans made by the Bank to the Borrower pursuant to this Revolving Credit
Note , together with interest, all as provided in Section 1 of this Note.

         SECTION 1. THE DEBT. Subject to and on the terms and conditions set
forth in this Note, the Bank shall provide loans and the Borrower shall repay
the indebtedness incurred hereunder as follows:

                  1.1. REVOLVING CREDIT LOANS. During the period from and
including the date hereof to but excluding the Maturity Date, the Bank agrees,
on the terms and conditions set forth in this Agreement, to make one or more
loans ("Revolving Credit Loans") to the Borrower in an aggregate principal
amount at any one time outstanding up to but not exceeding the greater of (a)
the Revolving Credit Commitment or (b) the Borrowing Base ((as such terms are
defined in Section 7.15 hereof). Subject to the terms of this Note, during such
period, the Borrower may borrow, repay and reborrow the amount of the Revolving
Credit Commitment by means of Revolving Credit Loans. The date, amount, and
interest rate of each Revolving Credit Loan made by the Bank to the Borrower,
and each payment made on account of the principal thereof, shall be recorded by
the Bank on its books and records, such recordation to constitute conclusive
evidence in the absence of manifest error of the amount of such Loans and
payments.

                  1.2. BORROWING PROCEDURE. The Borrower shall give the Bank
notice not later than 10:00 a.m. on the date of each Revolving Loan, specifying:

                           1.2.1. The date of such Loan, which shall be a
Banking Day; and

                           1.2.2. The aggregate amount of the Revolving Credit
Loan.

The proceeds of the initial Revolving Credit Loan (in the amount of $353,000)
shall be distributed to the Borrower to finance payments made by the Borrower to
vendors involved in the development of products described in Section 1.6 below.
The Borrower shall forward to the Bank proof of payment to such vendors pursuant
to Section 1.7 below. The proceeds of each subsequent Revolving Credit Loan
shall be forwarded by the Bank directly to specific vendors to pay amounts the
Borrower currently owes to such vendors. The vendors who receive proceeds of
<PAGE>   2
such Revolving Credit Loans shall be those vendors who are necessary to support
the development of products described in Section 1.6 below.

                  1.3. PRINCIPAL. The Borrower shall pay the principal balance
of this Note to the Bank on or before the Maturity Date.

                  1.4. INTEREST.

                           1.4.1. The Debt shall bear interest on the
outstanding principal amount, for each day at a per annum rate equal to the rate
of interest for such day publicly announced by the Bank as its prime rate (the
"Prime Rate") plus one hundred (100) basis points. The Prime Rate is not
intended to be the lowest rate of interest charged by the Bank in connection
with extensions of credit for borrowers. Interest on the Debt shall be paid by
the Borrower (a) on the last day of each calendar month, commencing December 31,
1999, (b) on the Maturity Date and (c) thereafter on demand.

                           1.4.2. All interest under this Note shall be computed
on the basis of the actual days elapsed in a year of 360 days.

                  1.5. PREPAYMENTS; PAYMENTS.

                           1.5.1. The Borrower shall have the right to make
prepayments at any time of the principal amount of the Debt, in whole or in
part, without notice. Each prepayment shall be without premium or penalty.
Subject to the terms and provisions of this Note, the Bank will reloan to the
Borrower such amounts as have been paid and applied on the principal balance of
a Revolving Credit Loan prepaid pursuant to this Section.

                           1.5.2. The Borrower shall make all payments of
principal and interest under this Note to the Bank at its main office (or such
other location as the Bank may direct) in immediately available funds. If any
payment of principal or interest on this Note shall become due on a day other
than a Banking Day, such payment shall be due and payable upon the next
succeeding Banking Day and such extension of time shall in such case be included
in computing interest in connection with such payment. A "Banking Day" is any
day on which the main office of the Bank is open for business.

                  1.6. PURPOSE. The purpose of the Revolving Credit Loans
represented by this Note is to support the development between the Borrower and
Ethicon Endo Surgery, Inc. ("EES") by providing working capital for the
manufacture of units outlined in an EES purchase order for $1,868,000.

                  1.7. CONDITION PRECEDENT. As a condition precedent to making
the first Revolving Credit Loan hereunder, the Borrower must:

                                       2
<PAGE>   3
                           1.7.1. have all liens on the personal property of the
Borrower subject to the Security Agreement described in Section 4 below either
released or subordinated to the satisfaction of the Bank; and

                           1.7.2. execute and deliver the Amended and Restated
Tennessee Revolving Credit Note dated as of the date hereof and issued to the
Bank in the original principal amount of $100,000 (the "Tennessee Note" and,
collectively with this Note, the "Notes").

         SECTION 2. REPRESENTATIONS AND WARRANTIES. The execution of this Note
by the Borrower shall be deemed to constitute the Borrower's representation and
warranty to the Bank that, at the time of execution and at the time of
disbursement of each Revolving Credit Loan hereunder: (a) the Notes and the
Security Agreement (as defined in Section 4 hereof) are the legal, valid and
binding obligations of the Borrower, enforceable against the Borrower in
accordance with their terms; (b) the Security Agreement creates a valid lien of
the Bank in the collateral thereof, prior to the claims of any other person or
entity; (c) the execution and delivery of the Notes and the Security Agreement
by the Borrower do not and will not conflict with, violate or constitute a
default under or breach of any court or administrative order, decree or ruling,
or any law, statute, ordinance or regulation, or any agreement, indenture,
mortgage, deed of trust, guaranty, lease, note or other obligation or instrument
binding upon the Borrower or any of its respective properties or assets; and (d)
neither this Note nor any other statement, assignment, agreement, instrument or
certificate of the Borrower made or delivered pursuant to or in connection with
this Note contains any untrue statement of a material fact or omits to state a
material fact required to be stated therein, in light of the circumstances under
which they were made, or necessary to make the statements therein not
misleading.

         SECTION 3. COVENANTS.

                  3.1. COMPLIANCE WITH LAWS. On and after the date hereof and
until the Debt shall have been repaid and discharged in full or otherwise
satisfied, the Borrower shall comply with all applicable laws.

                  3.2. FURNISHING OF FINANCIAL STATEMENTS AND OTHER INFORMATION.

                           3.2.1. The Borrower shall furnish to the Bank as soon
as practicable after the end of each of the month in each fiscal year of the
Borrower, and in any event within 30 days thereafter, complete internally
prepared financial statements (the "Financial Statements") of the Borrower,
including without limitation (a) a balance sheet of the Borrower as at the end
of such month, (b) a statement of operations of the Borrower for such month and
(c) a statement of cash flows of the Borrower for such month. All such Financial
Statements shall be in reasonable detail and certified by the Treasurer or
Controller of the Borrower as having been prepared in accordance with GAAP
(except as to footnotes and subject to year-end adjustments), as being true,
accurate, complete and correct in all material respects, and as presenting
fairly the financial position of the Borrower as at the respective date of such
balance sheet and the results of operations of the Borrower for the respective
period covered.

                                       3
<PAGE>   4
                           3.2.2. The Borrower shall furnish to the Bank as soon
as practicable after the end of each fiscal year of the Borrower, and in any
event within 90 days thereafter, complete audited Financial Statements of the
Borrower including without limitation (a) a balance sheet of each as at the end
of such fiscal year, (b) a statement of operations of each for such fiscal year,
(c) a statement of shareholders' equity of each for such fiscal year, and (d) a
statement of cash flows of each for such fiscal year, together with comparative
figures for the previous fiscal year, all in reasonable detail. The balance
sheets and statements shall be audited in form and substance satisfactory to the
Bank by independent certified public accountants of recognized standing
acceptable to the Bank.

                           5.2.3. The Borrower will furnish to the Bank as soon
as practicable after the end of each calendar month, and in any event within 15
days thereafter, an Accounts aging report in a format acceptable to the Bank and
a Borrowing Base Certificate for such month. During the occurrence of an Event
of Default, the Borrower shall be required to deliver aging schedules, trial
balances, test verifications of Accounts and other reports reasonably requested
by the Bank.

         SECTION 4. SECURITY FOR DEBT. This Note is secured by and entitled to
(a) an Amended and Restated Security Agreement dated as of the date hereof, made
by the Borrower for the benefit of the Bank (the "Security Agreement") and (b)
UCC-1 financing statements filed with the Ohio Secretary of State and the
Franklin County Recorder, each dated as of the date hereof, as any of the above
may be further amended or modified from time to time. Nothing contained in this
Note, the Security Agreement, or in any other document or instrument made in
connection herewith, shall be deemed or construed to create a partnership,
tenancy-in-common, joint tenancy, joint venture or co-ownership by or between
the Bank and the Borrower. The Bank shall not be in any way responsible for the
debts, losses, obligations or duties of the Borrower.

         SECTION 5. EVENTS OF DEFAULT. The following are Events of Default:

                  5.1. The Borrower fails to make a payment of interest on this
Note when and as due.

                  5.2. The Borrower fails to pay the principal of this Note when
and as due.

                  5.3. The Borrower fails to make a payment of any fee, expense
or other amount of money (not including the principal of or interest on this
Note) owing to the Bank under this Note when and as due and such failure is not
remedied within 10 Banking Days after the due date.

                  5.4. Any representation or warranty made by the Borrower in
this Note or any information contained in the Security Agreement, any
certificate, report, financial statement or other document delivered to the Bank
by the Borrower contains any untrue statement of a material fact or omits to
state a material fact required by this Note or law to be stated therein or

                                       4
<PAGE>   5
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading.

                  5.5. The Borrower fails to perform any of its obligations
under or fails to comply with any covenant contained in this Note and such
failure continues unremedied for a period of ten Banking Days.

                  5.6. Any governmental body or officer or creditor of the
Borrower seizes, takes possession of or collects (whether or not the Borrower
resists or acquiesces in such seizure, taking or collection) any property of the
Borrower by any means, including, without limitation, execution, levy,
sequestration, attachment, garnishment, replevin or self-help, unless such
seizure, taking or collection is vacated or the property is discharged within 30
days after the occurrence thereof.

                  5.7. One or more final judgments are entered against the
Borrower for the payment of money aggregating in excess of $50,000 and any one
of such judgments has been outstanding for more than 30 days from the date of
its entry and has not been discharged in full or stayed pending appeal.

                  5.8. The Borrower:

                           5.8.1. makes an assignment for the benefit of
creditors;

                           5.8.2. enters into any composition, compromise or
arrangement with its creditors;

                           5.8.3. generally does not pay its debts as such debts
become due; or

                           5.8.4. conceals, removes, or permits to be concealed
or removed, any part of its or his property, with intent to hinder, delay or
defraud its or his creditors or any of them, or makes or suffers a transfer of
any of its property, fraudulent under the provisions of any bankruptcy,
fraudulent conveyance or similar law, or makes or suffers a transfer of its
property to or for the benefit of a creditor at a time when other creditors
similarly situated have not been paid.

                  5.9. If:

                           5.9.1. a trustee, receiver, agent or custodian is
appointed or authorized to take charge of any property of the Borrower for the
purpose of enforcing a lien against such property or for the purpose of
administering such property for the benefit of the Borrower's creditors; or

                           5.9.2. an order (a) for relief against the Borrower
is granted under Title 11 of the United States Code or any similar law, (b)
appointing a receiver, trustee, agent or custodian of the Borrower or any
property of the Borrower or (c) providing for a composition,

                                       5
<PAGE>   6
compromise or arrangement with the creditors of the Borrower is entered by any
court or governmental body or officer; or

                           5.9.3. the Borrower files any pleading seeking
(whether by formal action or by the admission of the material allegations of a
pleading or otherwise) any such appointment or order; or

                           5.9.4. (a) any action or proceeding seeking any such
appointment or order is commenced without the authority or consent of the
Borrower and (b)(i) such action or proceeding is not dismissed within 90 days
after its commencement or (ii) the Borrower does not diligently contest such
action or proceeding.

                  5.10. An Event of Default occurs under the Security Agreement
or the Tennessee Note.

                  5.11. Except for the events that exist on the date this Note
is executed as disclosed on Schedule 5.11 hereto, the Borrower fails to pay when
and as due the principal of or any interest on any Indebtedness (as defined
below), other than as evidenced by this Note or the Security Documents (assuming
that all required notices have been properly given and all corresponding grace
periods, if any, have elapsed without cure by the Borrower) or any other event
exists which, under the terms of any agreement or instrument other than the Note
or the Security Documents, relates to any Indebtedness becoming, or becoming
capable at such time of being declared, due and payable before it would
otherwise have been due and payable. "Indebtedness" means, for the Borrower (a)
all indebtedness or other obligations of the Borrower for borrowed money or for
the deferred purchase price of property or services (except for unsecured trade
payables incurred in the ordinary course of business on normal and reasonable
terms), (b) all indebtedness or other obligations of any other person for
borrowed money or for the deferred purchase price of property or services, the
payment or collection of which the Borrower has guaranteed (except by reason of
endorsement for deposit or collection in the ordinary course of business) or in
respect of which the Borrower is liable, contingently or otherwise, including,
without limitation, liable by way of agreement to purchase, to provide funds for
payment, to supply funds to or otherwise to invest in such other person, or
otherwise to assure a creditor against loss, (c) all indebtedness or other
obligations of any other person for borrowed money or for the deferred purchase
price of property or services secured by (or for which the holder of such
indebtedness has an existing right, contingent or otherwise, to be secured by)
any lien upon or in property (including, without limitation, accounts and
contract rights) owned by the Borrower whether or not the Borrower has assumed
or become liable for the payment of such indebtedness or other obligations, (d)
all direct or contingent obligations of the Borrower in respect of letters of
credit and (e) all lease obligations which have been or should be, in accordance
with generally accepted accounting principles, capitalized on the books of the
Borrower as lessee.

                                       6
<PAGE>   7
         SECTION 6. DEFAULT REMEDIES.

                  6.1. ACCELERATION. If an Event of Default exists, the
outstanding unpaid principal balance of this Note, together with all interest
accrued hereon is immediately due and payable, without presentment, demand,
protest or notice of any kind, all of which are hereby waived.

                  6.2. SET-OFF. Any and all moneys now or at any time hereafter
owing to the Borrower from the Bank, and all other funds on deposit in one or
more checking accounts with the Bank for the benefit of the Borrower, are hereby
pledged for the security of this and all other indebtedness from the Borrower to
the Bank or any legal holder hereof, and may, upon any demand for payment, be
paid and applied thereon whether such indebtedness be then due or to become due,
all without notice to or demand on the Borrower or any other person, all such
notices and demands being hereby expressly waived. If an Event of Default
exists, the Bank shall have the right, in addition to all other rights and
remedies available to it, to set-off against the principal of and interest on
this Note and any fees, expenses or other amounts owed to the Bank under this
Note (a) all amounts owing to the Borrower by the Bank, whether or not then due
and payable, and (b) all other funds or property of the Borrower (i) in a
deposit account (general or special) maintained with the Bank, or (ii) on
deposit with or otherwise held by or in the custody of the Bank for the
beneficial account of the Borrower, whether solely in the name of or for the
benefit of the Borrower or jointly in the name of or for the benefit of the
Borrower and any other person, all without notice to or demand on the Borrower
or any other person, all such notices and demands being hereby expressly waived.
The Bank will notify the Borrower of any such set-off promptly after its
occurrence, but the failure to give such notice shall not affect the validity of
the set-off. The Borrower hereby confirms the Bank's right of banker's set-off
(also known as banker's lien) as it applies to the Borrower as set forth above,
and nothing in this Note shall be deemed a waiver or prohibition of such right
of banker's set-off.

                  6.3. REMEDIES CUMULATIVE. The Bank may exercise the remedies
provided in the Pledge Agreement upon the occurrence of an Event of Default. No
right or remedy conferred upon the Bank by this Note or legally available to the
Bank if an Event of Default exists is intended to be exclusive of any other
right or remedy, and each such right or remedy is cumulative and in addition to
every other such right or remedy.

                  6.4. FORCE MAJEURE. The existence of an Event of Default is
not affected by the reason for its occurrence, even if the Event of Default was
not caused by a voluntary act of the Borrower or was caused by a natural
disaster or force majeure.

         SECTION 7. MISCELLANEOUS.

                  7.1. MODIFICATIONS AND WAIVERS. No modification or waiver of
any term or provision contained in this Note and no consent to any departure by
the Borrower therefrom shall in any event be effective unless the same is in
writing and signed by the waiving party. Such waiver or consent shall be
effective only in the specific instance and for the purpose for which it is
given.

                                       7
<PAGE>   8
                  7.2. NOTICES. Except where specific provisions of this Note
provide for some other form of notice or require receipt as a condition of
notice, any consent, waiver, notice, demand or other instrument required or
permitted to be given under this Note shall be deemed to have been properly
received when in writing and delivered in person or sent by certified or
registered United States mail, return receipt requested, postage prepaid,
addressed, if to the Borrower: 425 Metro Place North, Suite 300, Dublin, Ohio
43017, Attention: Brent Larson; and if to the Bank: 10 West Broad Street,
Mezzanine Level, Columbus, Ohio 43287, Attention: Michael D. Davis. Either party
may change its address for notices by notice in the manner set forth above.

                  7.3. PARTIAL INVALIDITY. If any term or provision of this Note
or the application thereof to any person, firm or corporation or any
circumstance, shall be invalid or unenforceable, the remainder of this Note, or
the application of such term or provision to any person, firm or corporation or
any circumstances, other than those as to which it is held invalid, shall both
be unaffected thereby and each term or provision of this Note shall be valid and
be enforced to the fullest extent permitted by law.

                  7.4. NO IMPLIED RIGHTS OR WAIVERS. No notice to or demand on
the Borrower in any case shall entitle the Borrower to any other or further
notice or demand in the same, similar or other circumstances. Neither any
failure nor any delay on the part of the Bank in exercising any right, power or
privilege hereunder shall operate as a waiver thereof, nor shall a single or
partial exercise thereof preclude any other or further exercise of the same or
the exercise of any other right, power or privilege. The Borrower hereby waives
presentment, demand, notice, protest and all other demands and notices in
connection with the delivery, acceptance, performance, default or enforcement of
this Note.

                  7.5. SUCCESSORS AND ASSIGNS. This Note shall be binding upon
and inure to the benefit of the respective heirs, successors and assigns of the
Bank and the Borrower; provided that the Borrower shall have no right to assign
or transfer its rights under this Note voluntarily or by operation of law
without first obtaining the written consent of the Bank, and any attempted
assignment or transfer in the absence of such consent shall be void and of no
effect.

                  7.6. EXPENSES. All fees, costs and expenses, including
reasonable fees and expenses of outside legal counsel, incurred by the Bank in
connection with the preparation and enforcement of this Note or any other
instruments, documents, or agreements to be delivered pursuant hereto or in
connection herewith, shall be paid by the Borrower to the Bank on demand.

                  7.7. SURVIVAL OF PROVISIONS. All covenants, agreements,
representations, warranties and statements made in this Note or in any
certificate, statement, or other instrument given pursuant to this Note shall
survive the execution and delivery to the Bank of this Note and the making of
the Debt and shall continue in full force and effect so long as any obligation
of the Borrower under this Note is outstanding and unpaid.

                                       8
<PAGE>   9
                  7.8. CAPTIONS. The captions and section numbers appearing in
this Note are inserted only as a matter of convenience; they do not define,
limit, construe or describe the scope or intent of the provisions of this Note.

                  7.9. GOVERNING LAW. This Note shall be governed and construed
by the provisions hereof and in accordance with the laws of the State of Ohio
applicable to instruments to be performed in the State of Ohio.

                  7.10. CONSENT. The Borrower hereby irrevocably and
unconditionally consents to submit to the exclusive jurisdiction of the courts
of the State of Ohio and of the United States of America located in the City of
Columbus, Ohio for any actions, suits or proceedings arising out of or relating
to this Note and the transactions contemplated hereby (and the Borrower agrees
not to commence any action, suit or proceeding relating thereto except in such
courts), and further agrees that service of any process, summons, notice or
document by U.S. certified or registered mail, return receipt requested, to the
address set forth in Section 7.2 shall be effective service of process for any
action, suit or proceeding brought against the Borrower in any such court. The
Borrower hereby irrevocably and unconditionally waives any objection to the
laying of venue of any action, suit or proceeding arising out of this Note, or
the transactions contemplated hereby, in the courts of the State of Ohio or the
United States of America located in the City of Columbus, Ohio, and hereby
further irrevocably and unconditionally waives and agrees not to plead or claim
in any such court that any such action, suit or proceeding brought in any such
court has been brought in an inconvenient forum.

                  7.11. JOINT PREPARATION. This Note is to be deemed to have
been prepared jointly by the Borrower and the Bank, and any uncertainty or
ambiguity existing herein shall not be interpreted against either party, but
shall be interpreted according to the rules for the interpretation of arm's
length agreements.

                  7.12. THIRD PARTIES. Nothing herein expressed or implied is
intended or shall be construed to confer upon or give any person other than the
parties hereto and their successors or assigns, any rights or remedies under or
by reason of this Note.

                  7.13. CONFESSION OF JUDGMENT. The Borrower hereby authorizes
any attorney at law to appear for the Borrower, in an action on this Note, at
any time after the same become due, as herein provided, in any court of record
in or of the State of Ohio, or elsewhere, to waive the issuing and service of
process against the Borrower and to confess judgment in favor of the holder of
the this Note or the party entitled to the benefits hereof against the Borrower
for the amount that may be due, with interest at the rate herein mentioned and
costs of suit, and to waive and release all errors in said proceedings and
judgment, and all petitions in error, and right of appeal from the judgment
rendered.

                  7.14. WAIVER OF JURY TRIAL. THE BANK AND THE BORROWER HEREBY
VOLUNTARILY, IRREVOCABLY AND UNCONDITIONALLY WAIVE ANY RIGHT TO HAVE A JURY
PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT, OR
OTHERWISE, BETWEEN THE BANK AND THE BORROWER

                                       9
<PAGE>   10
ARISING OUT OF, IN CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE
RELATIONSHIP ESTABLISHED BETWEEN THE BORROWER AND THE BANK IN CONNECTION WITH
THIS NOTE, THE SECURITY DOCUMENTS, OR ANY OTHER AGREEMENT OR DOCUMENT EXECUTED
OR DELIVERED IN CONNECTION HEREWITH OR THEREWITH OR THE TRANSACTIONS RELATED
HERETO OR THERETO. THIS PROVISION IS A MATERIAL INDUCEMENT TO THE BANK TO ENTER
INTO THE FINANCING TRANSACTIONS WITH THE BORROWER. IT SHALL NOT IN ANY WAY
AFFECT, WAIVE, LIMIT, AMEND OR MODIFY THE BANK'S ABILITY TO PURSUE ITS REMEDIES
INCLUDING, BUT NOT LIMITED TO, ANY CONFESSION OF JUDGMENT OR COGNOVIT PROVISION
CONTAINED IN THIS NOTE, THE SECURITY DOCUMENTS OR ANY OTHER DOCUMENT RELATED
HERETO OR THERETO.

                  7.15. DEFINITIONS. As used in this Note, the following terms
shall have the meanings set forth below. Additional defined terms appear
elsewhere in this Note:

                  "Account" means and includes all accounts (whether or not
earned by performance), contract rights, chattel paper, instruments, documents,
general intangibles (including, without limitation, tax refunds and tax refund
claims) and all other forms of obligations owing to the Borrower, whether
secured or unsecured, whether now existing or hereafter created, and whether or
not specifically assigned to the Bank under the Security Agreement, all
guaranties and other security therefor, all merchandise returned to or
repossessed by Borrower, and all rights of stoppage in transit and all other
rights and remedies of an unpaid vendor, lienor or secured party.

                  "Borrowing Base" means the Net Value of Eligible Accounts.

                  "Borrowing Base Certificate" means a certificate, in the form
required by the Bank, signed by a duly authorized officer of the Borrower, that
computes the Borrowing Base, together with any memo of returns and credits,
remittance report, schedule of Accounts and such other supporting documents and
materials which the Bank, in its sole discretion, may require to be delivered
with such certificate.

                  "Customer" means any Person who is obligated as an Account
debtor or other obligor on, under, or in connection with any Account.

                  "Defaulted Account" means an Account that a Customer has not
satisfied in full on or before the 91st day after the date an invoice is issued.

                  "Eligible Account" means each Account of the Borrower which,
at the time of determination, meets all the following qualifications: (a) the
Borrower has lawful and absolute title to such Account, subject only to the Lien
of the Bank given by the Security Agreement; such Lien constitutes a perfected
Lien in the Account prior to the rights of any other Person and such Account is
not subject to any other Lien whatsoever; (b) the Borrower has the full
unqualified right to grant a Lien in such Account to the Bank as security and
collateral for the Obligations;

                                       10
<PAGE>   11
(c) the Account is evidenced by an invoice issued to the proper Customer and is
not evidenced by any instrument or chattel paper; (d) the Account arose from the
sale of goods or services by the Borrower in the ordinary course of business,
which goods or services have been shipped or delivered to the Customer under
such Account; and such sale was an absolute sale and not on consignment,
approval or a sale-and-return basis; (e) no notice of the bankruptcy,
receivership, reorganization or insolvency of the Customer has been received by
the Borrower; (f) the Account is a valid, legally enforceable obligation of the
Customer, and is not subject to any dispute, offset, counterclaim, or other
defense on the part of such Customer; (g) it is not a Defaulted Account; (h) the
terms of the Account require payment no more than 90 days from the date an
invoice is issued; (i) the Customer on the Account is not (1) the United States
of America or any foreign government, or any department, agency or
instrumentality thereof (unless the Borrower and the Bank shall have fully
complied with the Assignment of Claims Act of 1940, as amended, or any other
applicable law governing government Accounts, with respect to such Account), (2)
the Borrower, or any affiliate of the Borrower, (3) located outside the United
States or Canada, unless the sale is secured by a letter of credit on which the
Bank is the sole beneficiary and the form, substance and issuer of which are
acceptable to the Bank, or (4) indebted to the Borrower in an amount, which when
added to all other amounts then owed to the Borrower by any affiliate of such
Customer, exceeds 50% of the amount of all then outstanding Eligible Accounts
(other than EES); (j) the Borrower is not indebted to the Customer on the
Account (or any affiliate of such Customer) for any goods provided or services
rendered to the Borrower; (k) the Account is not owing by any Customer with 50%
or more of the value of its outstanding Accounts not qualifying as Eligible
Accounts; (l) the Account is an Account representing all or part of the sales
price of merchandise, insurance and service within the meaning of Section
3(c)(5) of the Investment Company Act of 1940, as amended; (m) a purchase of the
Account would constitute a "current transaction" within the meaning of Section
3(a)(3) of the Securities Act of 1933, as amended; (n) the Account is
denominated and payable only in United States dollars in the United States; and
(o) the Bank, acting in its sole discretion, has not notified the Borrower the
Account may not be considered as an Eligible Account.

                  "Lien" means any mortgage, deed of trust, lien, charge,
security interest (including, without limitation, a purchase money security
interest as such term is defined in Section 9-107 of the UCC) or encumbrance of
any kind upon, or pledge of, any property or asset, whether now owned or
hereafter acquired, and includes the acquisition of, or agreement to acquire,
any property or asset subject to any conditional sale agreement or other title
retention agreement, including a lease on terms tantamount thereto or on terms
otherwise substantially equivalent to a purchase.

                  "Net Value of Eligible Accounts" means 70% of the lower of the
book value or collectible value of Eligible Accounts as reflected in the
Borrower's books in accordance with GAAP, net of all credits, discounts and
allowances (including all unissued credits in the form of a competitive
allowance or otherwise).

                  "Obligations" means (a) the obligations of the Borrower to the
Bank under the Security Agreement and this Note, (b) all costs and expenses
incurred by the Bank in the collection or the enforcement of any such
obligations of the Borrower, or realization upon the

                                       11
<PAGE>   12
Collateral, including, without limitation, reasonable attorneys' fees and legal
expenses, (c) all future advances made by the Bank for the maintenance,
protection or preservation of the Collateral or any portion thereof, including,
without limitation, advances for storage, insurance premiums, transportation
charges, and the like and (d) all other obligations of the Borrower to the Bank,
howsoever created, arising, or evidenced, whether direct or indirect, absolute
or contingent, or now or hereafter existing or due or to become due.

                  "Person" means any individual, sole proprietorship,
partnership, joint venture, corporation, trust, unincorporated organization,
government (or any department, agency, instrumentality or political division
thereof) or any other entity.

                  "Revolving Credit Commitment" means the obligation of the Bank
to make Revolving Credit Loans to the Borrower hereunder and under the Tennessee
Note up to an aggregate principal amount of $500,000. The principal amount
outstanding under the Tennessee Note shall decrease the aggregate principal
amount available for the Revolving Credit Loans hereunder by a corresponding
amount.

         This Note was executed in Columbus, Ohio as of the date first written
above.

================================================================================
WARNING - BY SIGNING THIS PAPER YOU GIVE UP YOUR RIGHT TO NOTICE AND COURT
TRIAL. IF YOU DO NOT PAY ON TIME A COURT JUDGMENT MAY BE TAKEN AGAINST YOU
WITHOUT YOUR PRIOR KNOWLEDGE AND THE POWERS OF A COURT CAN BE USED TO COLLECT
FROM YOU REGARDLESS OF ANY CLAIMS YOU MAY HAVE AGAINST THE CREDITOR WHETHER FOR
RETURNED GOODS, FAULTY GOODS, FAILURE ON HIS PART TO COMPLY WITH THE AGREEMENT,
OR ANY OTHER CAUSE.
================================================================================


                                      NEOPROBE CORPORATION

                                      By: /s/ David C. Bupp
                                          -----------------
                                      Name: David C. Bupp
                                      Its: President and Chief Executive Officer

                                       12
<PAGE>   13
<TABLE>
              SCHEDULE 5.11: PAST DUE INDEBTEDNESS AND POTENTIAL OBLIGATIONS

<CAPTION>
                                                                       Amount as
Counterparty               Description                                 of August 31, 1999
- ------------               -----------                                 ------------------
<S>                        <C>                                         <C>
OSU Research Foundation    past due RIGS-related trade payable         $177,000 (1)
                           under research and development
                           agreement

DSM Biologics              past due RIGS-related trade payable         $277,717 (2)
                           under manufacturing and supply
                           agreement


Aries Master Fund and      potential obligation due to possible        $3,600,000 (3)
Aries Domestic Fund LP     default under February 16, 1999
                           Preferred Stock and Warrant Purchase
                           Agreement

Various vendors of         past due vendor payments primarily          $892,612 (4)
Neoprobe (Israel) Ltd.     associated with construction of
                           Neoprobe (Israel) Ltd.'s
                           radiolabeling facility at Dimona, Israel
</TABLE>

Notes:
(1)      Neoprobe negotiated a settlement with this party for $120,000 payable
         over six months starting 8/31/99.
(2)      Neoprobe negotiated a settlement with this party for $170,000 payable
         over twelve months 9/30/99.
(3)      Amount is based on potential redemption amount of Preferred Stock
         should the Aries parties request redemption; however, Neoprobe has
         received no such request and is in discussions with Aries
         representatives to restructure this transaction
(4)      Neoprobe (Israel) Ltd. is in liquidation. Neoprobe Corporation does not
         anticipate paying these amounts at their full face value; however, the
         amounts have been reserved in the consolidated financial statements of
         Neoprobe Corporation should management decide to do so.

                                       13

<PAGE>   1
                                                                 Exhibit 10.4.41


                         TENNESSEE REVOLVING CREDIT NOTE


================================================================================
                                                                  COLUMBUS, OHIO
$100,000                                                      DECEMBER  31, 1999
================================================================================


         FOR VALUE RECEIVED, the undersigned, NEOPROBE CORPORATION, a Delaware
corporation, whose address is 425 Metro Place North, Suite 400, Dublin, Ohio
43017 (the "Borrower"), hereby promises to pay to the order of THE PROVIDENT
BANK, an Ohio banking corporation (the "Bank"), on or before February 29, 2000
(the "Maturity Date"), the principal sum of One Hundred Thousand Dollars
($100,000) or, if such principal is less, the aggregate unpaid principal amount
of all loans made by the Bank to the Borrower pursuant to this Revolving Credit
Note, together with interest, all as provided in Section 1 of this Note.

         SECTION 1. THE DEBT. Subject to and on the terms and conditions set
forth in this Note, the Bank shall provide loans and the Borrower shall repay
the indebtedness incurred hereunder as follows:

                  1.1. REVOLVING CREDIT LOANS. During the period from and
including the date hereof to but excluding the Maturity Date, the Bank agrees,
on the terms and conditions set forth in this Agreement, to make one or more
loans ("Revolving Credit Loans") to the Borrower in an aggregate principal
amount at any one time outstanding up to but not exceeding the greater of (a)
the Revolving Credit Commitment or (b) the Borrowing Base (as such terms are
defined in Section 7.15 hereof). Subject to the terms of this Note, during such
period, the Borrower may borrow, repay and reborrow the amount of the Revolving
Credit Commitment by means of Revolving Credit Loans. The date, amount, and
interest rate of each Revolving Credit Loan made by the Bank to the Borrower,
and each payment made on account of the principal thereof, shall be recorded by
the Bank on its books and records, such recordation to constitute conclusive
evidence in the absence of manifest error of the amount of such Loans and
payments.

                  1.2. BORROWING PROCEDURE. The Borrower shall give the Bank
notice not later than 10:00 a.m on the date of each Revolving Loan, specifying:

                           1.2.1. The date of such Loan, which shall be a
Banking Day; and

                           1.2.2. The aggregate amount of the Revolving Credit
Loan.

The proceeds of the initial Revolving Credit Loan (in the amount of $353,000)
shall be distributed to the Borrower to finance payments made by the Borrower to
vendors involved in the development of products described in Section 1.6 below.
The Borrower shall forward to the Bank proof of payment to such vendors pursuant
to Section 1.7 below. The proceeds of each subsequent Revolving Credit Loan
shall be forwarded by the Bank directly to specific vendors to pay amounts the
Borrower currently owes to such vendors. The vendors who receive proceeds of
<PAGE>   2

such Revolving Credit Loans shall be those vendors who are necessary to support
the development of products described in Section 1.6 below.

                  1.3. PRINCIPAL. The Borrower shall pay the principal balance
of this Note to the Bank on or before the Maturity Date.

                  1.4. INTEREST.

                           1.4.1. The Debt shall bear interest on the
outstanding principal amount, for each day at a per annum rate equal to the rate
of interest for such day publicly announced by the Bank as its prime rate (the
"Prime Rate") plus one hundred (100) basis points. The Prime Rate is not
intended to be the lowest rate of interest charged by the Bank in connection
with extensions of credit for borrowers. Interest on the Debt shall be paid by
the Borrower (a) on the last day of each calendar month, commencing December 31,
1999, (b) on the Maturity Date and (c) thereafter on demand.

                           1.4.2. All interest under this Note shall be computed
on the basis of the actual days elapsed in a year of 360 days.

                  1.5. PREPAYMENTS; PAYMENTS.

                           1.5.1. The Borrower shall have the right to make
prepayments at any time of the principal amount of the Debt, in whole or in
part, without notice. Each prepayment shall be without premium or penalty.
Subject to the terms and provisions of this Note, the Bank will reloan to the
Borrower such amounts as have been paid and applied on the principal balance of
a Revolving Credit Loan prepaid pursuant to this Section.

                           1.5.2. The Borrower shall make all payments of
principal and interest under this Note to the Bank at its main office (or such
other location as the Bank may direct) in immediately available funds. If any
payment of principal or interest on this Note shall become due on a day other
than a Banking Day, such payment shall be due and payable upon the next
succeeding Banking Day and such extension of time shall in such case be included
in computing interest in connection with such payment. A "Banking Day" is any
day on which the main office of the Bank is open for business.

                  1.6. PURPOSE. The purpose of the Revolving Credit Loans
represented by this Note is to support the development between the Borrower and
Ethicon Endo Surgery, Inc. ("EES") by providing working capital for the
manufacture of units outlined in an EES purchase order for $1,868,000.

                  1.7. CONDITION PRECEDENT. As a condition precedent to making
the first Revolving Credit Loan hereunder, the Borrower must:



                                        2
<PAGE>   3

                           1.7.1. have all liens on the personal property of the
Borrower subject to the Security Agreement described in Section 4 below either
released or subordinated to the satisfaction of the Bank; and

                           1.7.2. execute and deliver the Amended and Restated
Revolving Credit Note dated as of the date hereof and issued to the Bank in the
original principal amount of $400,000 (the "Ohio Note" and, collectively with
this Note, the "Notes").

         SECTION 2. REPRESENTATIONS AND WARRANTIES. The execution of this Note
by the Borrower shall be deemed to constitute the Borrower's representation and
warranty to the Bank that, at the time of execution and at the time of
disbursement of each Revolving Credit Loan hereunder: (a) the Notes and the
Security Agreement (as defined in Section 4 hereof) are the legal, valid and
binding obligations of the Borrower, enforceable against the Borrower in
accordance with their terms; (b) the Security Agreement creates a valid lien of
the Bank in the collateral thereof, prior to the claims of any other person or
entity; (c) the execution and delivery of the Notes and the Security Agreement
by the Borrower do not and will not conflict with, violate or constitute a
default under or breach of any court or administrative order, decree or ruling,
or any law, statute, ordinance or regulation, or any agreement, indenture,
mortgage, deed of trust, guaranty, lease, note or other obligation or instrument
binding upon the Borrower or any of its respective properties or assets; and (d)
neither this Note nor any other statement, assignment, agreement, instrument or
certificate of the Borrower made or delivered pursuant to or in connection with
this Note contains any untrue statement of a material fact or omits to state a
material fact required to be stated therein, in light of the circumstances under
which they were made, or necessary to make the statements therein not
misleading.

         SECTION 3. COVENANTS.

                  3.1. COMPLIANCE WITH LAWS. On and after the date hereof and
until the Debt shall have been repaid and discharged in full or otherwise
satisfied, the Borrower shall comply with all applicable laws.

                  3.2. FURNISHING OF FINANCIAL STATEMENTS AND OTHER INFORMATION.

                           3.2.1. The Borrower shall furnish to the Bank as soon
as practicable after the end of each of the month in each fiscal year of the
Borrower, and in any event within 30 days thereafter, complete internally
prepared financial statements (the "Financial Statements") of the Borrower,
including without limitation (a) a balance sheet of the Borrower as at the end
of such month, (b) a statement of operations of the Borrower for such month and
(c) a statement of cash flows of the Borrower for such month. All such Financial
Statements shall be in reasonable detail and certified by the Treasurer or
Controller of the Borrower as having been prepared in accordance with GAAP
(except as to footnotes and subject to year-end adjustments), as being true,
accurate, complete and correct in all material respects, and as presenting
fairly the financial position of the Borrower as at the respective date of such
balance sheet and the results of operations of the Borrower for the respective
period covered.



                                        3
<PAGE>   4

                           3.2.2. The Borrower shall furnish to the Bank as soon
as practicable after the end of each fiscal year of the Borrower, and in any
event within 90 days thereafter, complete audited Financial Statements of the
Borrower including without limitation (a) a balance sheet of each as at the end
of such fiscal year, (b) a statement of operations of each for such fiscal year,
(c) a statement of shareholders' equity of each for such fiscal year, and (d) a
statement of cash flows of each for such fiscal year, together with comparative
figures for the previous fiscal year, all in reasonable detail. The balance
sheets and statements shall be audited in form and substance satisfactory to the
Bank by independent certified public accountants of recognized standing
acceptable to the Bank.

                           5.2.3. The Borrower will furnish to the Bank as soon
as practicable after the end of each calendar month, and in any event within 15
days thereafter, an Accounts aging report in a format acceptable to the Bank and
a Borrowing Base Certificate for such month. During the occurrence of an Event
of Default, the Borrower shall be required to deliver aging schedules, trial
balances, test verifications of Accounts and other reports reasonably requested
by the Bank.

         SECTION 4. SECURITY FOR DEBT. This Note is secured by and entitled to
(a) an Amended and Restated Security Agreement dated as of the date hereof, made
by the Borrower for the benefit of the Bank (the "Security Agreement") and (b)
UCC-1 financing statements filed with the Ohio Secretary of State and the
Franklin county Recorder, each dated as of the date hereof, as any of the above
may be further amended or modified from time to time. Nothing contained in this
Note, the Security Agreement, or in any other document or instrument made in
connection herewith, shall be deemed or construed to create a partnership,
tenancy-in-common, joint tenancy, joint venture or co-ownership by or between
the Bank and the Borrower. The Bank shall not be in any way responsible for the
debts, losses, obligations or duties of the Borrower.

         SECTION 5. EVENTS OF DEFAULT. The following are Events of Default:

                  5.1. The Borrower fails to make a payment of interest on this
Note when and as due.

                  5.2. The Borrower fails to pay the principal of this Note when
and as due.

                  5.3. The Borrower fails to make a payment of any fee, expense
or other amount of money (not including the principal of or interest on this
Note) owing to the Bank under this Note when and as due and such failure is not
remedied within 10 Banking Days after the due date.

                  5.4. Any representation or warranty made by the Borrower in
this Note or any information contained in the Security Agreement, any
certificate, report, financial statement or other document delivered to the Bank
by the Borrower contains any untrue statement of a material fact or omits to
state a material fact required by this Note or law to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading.



                                        4
<PAGE>   5

                  5.5. The Borrower fails to perform any of its obligations
under or fails to comply with any covenant contained in this Note and such
failure continues unremedied for a period of ten Banking Days.

                  5.6. Any governmental body or officer or creditor of the
Borrower seizes, takes possession of or collects (whether or not the Borrower
resists or acquiesces in such seizure, taking or collection) any property of the
Borrower by any means, including, without limitation, execution, levy,
sequestration, attachment, garnishment, replevin or self-help, unless such
seizure, taking or collection is vacated or the property is discharged within 30
days after the occurrence thereof.

                  5.7. One or more final judgments are entered against the
Borrower for the payment of money aggregating in excess of $50,000 and any one
of such judgments has been outstanding for more than 30 days from the date of
its entry and has not been discharged in full or stayed pending appeal.

                  5.8. The Borrower:

                           5.8.1. makes an assignment for the benefit of
creditors;

                           5.8.2. enters into any composition, compromise or
arrangement with its creditors;

                           5.8.3. generally does not pay its debts as such debts
become due; or

                           5.8.4. conceals, removes, or permits to be concealed
or removed, any part of its or his property, with intent to hinder, delay or
defraud its or his creditors or any of them, or makes or suffers a transfer of
any of its property, fraudulent under the provisions of any bankruptcy,
fraudulent conveyance or similar law, or makes or suffers a transfer of its
property to or for the benefit of a creditor at a time when other creditors
similarly situated have not been paid.

                  5.9. If:

                           5.9.1. a trustee, receiver, agent or custodian is
appointed or authorized to take charge of any property of the Borrower for the
purpose of enforcing a lien against such property or for the purpose of
administering such property for the benefit of the Borrower's creditors; or

                           5.9.2. an order (a) for relief against the Borrower
is granted under Title 11 of the United States Code or any similar law, (b)
appointing a receiver, trustee, agent or custodian of the Borrower or any
property of the Borrower or (c) providing for a composition, compromise or
arrangement with the creditors of the Borrower is entered by any court or
governmental body or officer; or

                                       5
<PAGE>   6

                           5.9.3. the Borrower files any pleading seeking
(whether by formal action or by the admission of the material allegations of a
pleading or otherwise) any such appointment or order; or

                           5.9.4. (a) any action or proceeding seeking any such
appointment or order is commenced without the authority or consent of the
Borrower and (b)(i) such action or proceeding is not dismissed within 90 days
after its commencement or (ii) the Borrower does not diligently contest such
action or proceeding.

                  5.10. An Event of Default occurs under the Security Agreement
or the Ohio Note.

                  5.11. Except for the events that exist on the date this Note
is executed as disclosed on Schedule 5.11 hereto, the Borrower fails to pay when
and as due the principal of or any interest on any Indebtedness (as defined
below), other than as evidenced by this Note or the Security Documents (assuming
that all required notices have been properly given and all corresponding grace
periods, if any, have elapsed without cure by the Borrower) or any other event
exists which, under the terms of any agreement or instrument other than the Note
or the Security Documents, relates to any Indebtedness becoming, or becoming
capable at such time of being declared, due and payable before it would
otherwise have been due and payable. "Indebtedness" means, for the Borrower (a)
all indebtedness or other obligations of the Borrower for borrowed money or for
the deferred purchase price of property or services (except for unsecured trade
payables incurred in the ordinary course of business on normal and reasonable
terms), (b) all indebtedness or other obligations of any other person for
borrowed money or for the deferred purchase price of property or services, the
payment or collection of which the Borrower has guaranteed (except by reason of
endorsement for deposit or collection in the ordinary course of business) or in
respect of which the Borrower is liable, contingently or otherwise, including,
without limitation, liable by way of agreement to purchase, to provide funds for
payment, to supply funds to or otherwise to invest in such other person, or
otherwise to assure a creditor against loss, (c) all indebtedness or other
obligations of any other person for borrowed money or for the deferred purchase
price of property or services secured by (or for which the holder of such
indebtedness has an existing right, contingent or otherwise, to be secured by)
any lien upon or in property (including, without limitation, accounts and
contract rights) owned by the Borrower whether or not the Borrower has assumed
or become liable for the payment of such indebtedness or other obligations, (d)
all direct or contingent obligations of the Borrower in respect of letters of
credit and (e) all lease obligations which have been or should be, in accordance
with generally accepted accounting principles, capitalized on the books of the
Borrower as lessee.

         SECTION 6. DEFAULT REMEDIES.

                  6.1. ACCELERATION. If an Event of Default exists, the
outstanding unpaid principal balance of this Note, together with all interest
accrued hereon is immediately due and payable, without presentment, demand,
protest or notice of any kind, all of which are hereby waived.

                                       6
<PAGE>   7

                  6.2. SET-OFF. Any and all moneys now or at any time hereafter
owing to the Borrower from the Bank, and all other funds on deposit in one or
more checking accounts with the Bank for the benefit of the Borrower, are hereby
pledged for the security of this and all other indebtedness from the Borrower to
the Bank or any legal holder hereof, and may, upon any demand for payment, be
paid and applied thereon whether such indebtedness be then due or to become due,
all without notice to or demand on the Borrower or any other person, all such
notices and demands being hereby expressly waived. If an Event of Default
exists, the Bank shall have the right, in addition to all other rights and
remedies available to it, to set-off against the principal of and interest on
this Note and any fees, expenses or other amounts owed to the Bank under this
Note (a) all amounts owing to the Borrower by the Bank, whether or not then due
and payable, and (b) all other funds or property of the Borrower (i) in a
deposit account (general or special) maintained with the Bank, or (ii) on
deposit with or otherwise held by or in the custody of the Bank for the
beneficial account of the Borrower, whether solely in the name of or for the
benefit of the Borrower or jointly in the name of or for the benefit of the
Borrower and any other person, all without notice to or demand on the Borrower
or any other person, all such notices and demands being hereby expressly waived.
The Bank will notify the Borrower of any such set-off promptly after its
occurrence, but the failure to give such notice shall not affect the validity of
the set-off. The Borrower hereby confirms the Bank's right of banker's set-off
(also known as banker's lien) as it applies to the Borrower as set forth above,
and nothing in this Note shall be deemed a waiver or prohibition of such right
of banker's set-off.

                  6.3. REMEDIES CUMULATIVE. The Bank may exercise the remedies
provided in the Pledge Agreement upon the occurrence of an Event of Default. No
right or remedy conferred upon the Bank by this Note or legally available to the
Bank if an Event of Default exists is intended to be exclusive of any other
right or remedy, and each such right or remedy is cumulative and in addition to
every other such right or remedy.

                  6.4. FORCE MAJEURE. The existence of an Event of Default is
not affected by the reason for its occurrence, even if the Event of Default was
not caused by a voluntary act of the Borrower or was caused by a natural
disaster or force majeure.

         SECTION 7. MISCELLANEOUS.

                  7.1. MODIFICATIONS AND WAIVERS. No modification or waiver of
any term or provision contained in this Note and no consent to any departure by
the Borrower therefrom shall in any event be effective unless the same is in
writing and signed by the waiving party. Such waiver or consent shall be
effective only in the specific instance and for the purpose for which it is
given.

                  7.2. NOTICES. Except where specific provisions of this Note
provide for some other form of notice or require receipt as a condition of
notice, any consent, waiver, notice, demand or other instrument required or
permitted to be given under this Note shall be deemed to have been properly
received when in writing and delivered in person or sent by certified or
registered United States mail, return receipt requested, postage prepaid,
addressed, if to the Borrower: 425 Metro Place North, Suite 300, Dublin, Ohio
43017, Attention: Brent Larson;



                                       7
<PAGE>   8
and if to the Bank: 10 West Broad Street, Mezzanine Level, Columbus, Ohio 43287,
Attention: Michael D. Davis. Either party may change its address for notices by
notice in the manner set forth above.

                  7.3. PARTIAL INVALIDITY. If any term or provision of this Note
or the application thereof to any person, firm or corporation or any
circumstance, shall be invalid or unenforceable, the remainder of this Note, or
the application of such term or provision to any person, firm or corporation or
any circumstances, other than those as to which it is held invalid, shall both
be unaffected thereby and each term or provision of this Note shall be valid and
be enforced to the fullest extent permitted by law.

                  7.4. NO IMPLIED RIGHTS OR WAIVERS. No notice to or demand on
the Borrower in any case shall entitle the Borrower to any other or further
notice or demand in the same, similar or other circumstances. Neither any
failure nor any delay on the part of the Bank in exercising any right, power or
privilege hereunder shall operate as a waiver thereof, nor shall a single or
partial exercise thereof preclude any other or further exercise of the same or
the exercise of any other right, power or privilege. The Borrower hereby waives
presentment, demand, notice, protest and all other demands and notices in
connection with the delivery, acceptance, performance, default or enforcement of
this Note.

                  7.5. SUCCESSORS AND ASSIGNS. This Note shall be binding upon
and inure to the benefit of the respective heirs, successors and assigns of the
Bank and the Borrower; provided that the Borrower shall have no right to assign
or transfer its rights under this Note voluntarily or by operation of law
without first obtaining the written consent of the Bank, and any attempted
assignment or transfer in the absence of such consent shall be void and of no
effect.

                  7.6. EXPENSES. All fees, costs and expenses, including
reasonable fees and expenses of outside legal counsel, incurred by the Bank in
connection with the preparation and enforcement of this Note or any other
instruments, documents, or agreements to be delivered pursuant hereto or in
connection herewith, shall be paid by the Borrower to the Bank on demand.

                  7.7. SURVIVAL OF PROVISIONS. All covenants, agreements,
representations, warranties and statements made in this Note or in any
certificate, statement, or other instrument given pursuant to this Note shall
survive the execution and delivery to the Bank of this Note and the making of
the Debt and shall continue in full force and effect so long as any obligation
of the Borrower under this Note is outstanding and unpaid.

                  7.8. CAPTIONS. The captions and section numbers appearing in
this Note are inserted only as a matter of convenience; they do not define,
limit, construe or describe the scope or intent of the provisions of this Note.

                  7.9. GOVERNING LAW. This Note shall be governed and construed
by the provisions hereof and in accordance with the laws of the State of Ohio
applicable to instruments to be performed in the State of Ohio.



                                       8
<PAGE>   9

                  7.10. CONSENT. The Borrower hereby irrevocably and
unconditionally consents to submit to the exclusive jurisdiction of the courts
of the State of Ohio and of the United States of America located in the City of
Columbus, Ohio for any actions, suits or proceedings arising out of or relating
to this Note and the transactions contemplated hereby (and the Borrower agrees
not to commence any action, suit or proceeding relating thereto except in such
courts), and further agrees that service of any process, summons, notice or
document by U.S. certified or registered mail, return receipt requested, to the
address set forth in Section 7.2 shall be effective service of process for any
action, suit or proceeding brought against the Borrower in any such court. The
Borrower hereby irrevocably and unconditionally waives any objection to the
laying of venue of any action, suit or proceeding arising out of this Note, or
the transactions contemplated hereby, in the courts of the State of Ohio or the
United States of America located in the City of Columbus, Ohio, and hereby
further irrevocably and unconditionally waives and agrees not to plead or claim
in any such court that any such action, suit or proceeding brought in any such
court has been brought in an inconvenient forum.

                  7.11. JOINT PREPARATION. This Note is to be deemed to have
been prepared jointly by the Borrower and the Bank, and any uncertainty or
ambiguity existing herein shall not be interpreted against either party, but
shall be interpreted according to the rules for the interpretation of arm's
length agreements.

                  7.12. THIRD PARTIES. Nothing herein expressed or implied is
intended or shall be construed to confer upon or give any person other than the
parties hereto and their successors or assigns, any rights or remedies under or
by reason of this Note.

                  7.13. CONFESSION OF JUDGMENT. The Borrower hereby authorizes
any attorney at law to appear for the Borrower, in an action on this Note, at
any time after the same become due, as herein provided, in any court of record
in or of the State of Ohio, or elsewhere, to waive the issuing and service of
process against the Borrower and to confess judgment in favor of the holder of
the this Note or the party entitled to the benefits hereof against the Borrower
for the amount that may be due, with interest at the rate herein mentioned and
costs of suit, and to waive and release all errors in said proceedings and
judgment, and all petitions in error, and right of appeal from the judgment
rendered.

                  7.14. WAIVER OF JURY TRIAL. THE BANK AND THE BORROWER HEREBY
VOLUNTARILY, IRREVOCABLY AND UNCONDITIONALLY WAIVE ANY RIGHT TO HAVE A JURY
PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT, OR
OTHERWISE, BETWEEN THE BANK AND THE BORROWER ARISING OUT OF, IN CONNECTION WITH,
RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED BETWEEN THE BORROWER
AND THE BANK IN CONNECTION WITH THIS NOTE, THE SECURITY DOCUMENTS, OR ANY OTHER
AGREEMENT OR DOCUMENT EXECUTED OR DELIVERED IN CONNECTION HEREWITH OR THEREWITH
OR THE TRANSACTIONS RELATED HERETO OR THERETO. THIS PROVISION IS A MATERIAL
INDUCEMENT TO THE BANK TO ENTER INTO THE FINANCING TRANSACTIONS WITH THE
BORROWER. IT SHALL NOT IN ANY WAY AFFECT, WAIVE, LIMIT, AMEND OR MODIFY THE
BANK'S



                                       9
<PAGE>   10

ABILITY TO PURSUE ITS REMEDIES INCLUDING, BUT NOT LIMITED TO, ANY CONFESSION OF
JUDGMENT OR COGNOVIT PROVISION CONTAINED IN THIS NOTE, THE SECURITY DOCUMENTS OR
ANY OTHER DOCUMENT RELATED HERETO OR THERETO.

                  7.15. DEFINITIONS. As used in this Note, the following terms
shall have the meanings set forth below. Additional defined terms appear
elsewhere in this Note:

                  "Account" means and includes all accounts (whether or not
earned by performance), contract rights, chattel paper, instruments, documents,
general intangibles (including, without limitation, tax refunds and tax refund
claims) and all other forms of obligations owing to the Borrower, whether
secured or unsecured, whether now existing or hereafter created, and whether or
not specifically assigned to the Bank under the Security Agreement, all
guaranties and other security therefor, all merchandise returned to or
repossessed by Borrower, and all rights of stoppage in transit and all other
rights and remedies of an unpaid vendor, lienor or secured party.

                  "Borrowing Base" means the Net Value of Eligible Accounts.

                  "Borrowing Base Certificate" means a certificate, in the form
required by the Bank, signed by a duly authorized officer of the Borrower, that
computes the Borrowing Base, together with any memo of returns and credits,
remittance report, schedule of Accounts and such other supporting documents and
materials which the Bank, in its sole discretion, may require to be delivered
with such certificate.

                  "Customer" means any Person who is obligated as an Account
debtor or other obligor on, under, or in connection with any Account.

                  "Defaulted Account" means an Account that a Customer has not
satisfied in full on or before the 91st day after the date an invoice is issued.

                  "Eligible Account" means each Account of the Borrower which,
at the time of determination, meets all the following qualifications: (a) the
Borrower has lawful and absolute title to such Account, subject only to the Lien
of the Bank given by the Security Agreement; such Lien constitutes a perfected
Lien in the Account prior to the rights of any other Person and such Account is
not subject to any other Lien whatsoever; (b) the Borrower has the full
unqualified right to grant a Lien in such Account to the Bank as security and
collateral for the Obligations; (c) the Account is evidenced by an invoice
issued to the proper Customer and is not evidenced by any instrument or chattel
paper; (d) the Account arose from the sale of goods or services by the Borrower
in the ordinary course of business, which goods or services have been shipped or
delivered to the Customer under such Account; and such sale was an absolute sale
and not on consignment, approval or a sale-and-return basis; (e) no notice of
the bankruptcy, receivership, reorganization or insolvency of the Customer has
been received by the Borrower; (f) the Account is a valid, legally enforceable
obligation of the Customer, and is not subject to any dispute, offset,
counterclaim, or other defense on the part of such Customer; (g) it is not a
Defaulted



                                       10
<PAGE>   11

Account; (h) the terms of the Account require payment no more than 90 days from
the date an invoice is issued; (i) the Customer on the Account is not (1) the
United States of America or any foreign government, or any department, agency or
instrumentality thereof (unless the Borrower and the Bank shall have fully
complied with the Assignment of Claims Act of 1940, as amended, or any other
applicable law governing government Accounts, with respect to such Account), (2)
the Borrower, or any affiliate of the Borrower, (3) located outside the United
States or Canada, unless the sale is secured by a letter of credit on which the
Bank is the sole beneficiary and the form, substance and issuer of which are
acceptable to the Bank, or (4) indebted to the Borrower in an amount, which when
added to all other amounts then owed to the Borrower by any affiliate of such
Customer, exceeds 50% of the amount of all then outstanding Eligible Accounts
(other than EES); (j) the Borrower is not indebted to the Customer on the
Account (or any affiliate of such Customer) for any goods provided or services
rendered to the Borrower; (k) the Account is not owing by any Customer with 50%
or more of the value of its outstanding Accounts not qualifying as Eligible
Accounts; (l) the Account is an Account representing all or part of the sales
price of merchandise, insurance and service within the meaning of Section
3(c)(5) of the Investment Company Act of 1940, as amended; (m) a purchase of the
Account would constitute a "current transaction" within the meaning of Section
3(a)(3) of the Securities Act of 1933, as amended; (n) the Account is
denominated and payable only in United States dollars in the United States; and
(o) the Bank, acting in its sole discretion, has not notified the Borrower the
Account may not be considered as an Eligible Account.

                  "Lien" means any mortgage, deed of trust, lien, charge,
security interest (including, without limitation, a purchase money security
interest as such term is defined in Section 9-107 of the UCC) or encumbrance of
any kind upon, or pledge of, any property or asset, whether now owned or
hereafter acquired, and includes the acquisition of, or agreement to acquire,
any property or asset subject to any conditional sale agreement or other title
retention agreement, including a lease on terms tantamount thereto or on terms
otherwise substantially equivalent to a purchase.

                  "Net Value of Eligible Accounts" means 70% of the lower of the
book value or collectible value of Eligible Accounts as reflected in the
Borrower's books in accordance with GAAP, net of all credits, discounts and
allowances (including all unissued credits in the form of a competitive
allowance or otherwise).

                  "Obligations" means (a) the obligations of the Borrower to the
Bank under the Security Agreement and this Note, (b) all costs and expenses
incurred by the Bank in the collection or the enforcement of any such
obligations of the Borrower, or realization upon the Collateral, including,
without limitation, reasonable attorneys' fees and legal expenses, (c) all
future advances made by the Bank for the maintenance, protection or preservation
of the Collateral or any portion thereof, including, without limitation,
advances for storage, insurance premiums, transportation charges, and the like
and (d) all other obligations of the Borrower to the Bank, howsoever created,
arising, or evidenced, whether direct or indirect, absolute or contingent, or
now or hereafter existing or due or to become due.



                                       11
<PAGE>   12

                  "Person" means any individual, sole proprietorship,
partnership, joint venture, corporation, trust, unincorporated organization,
government (or any department, agency, instrumentality or political division
thereof) or any other entity.

                  "Revolving Credit Commitment" means the obligation of the Bank
to make Revolving Credit Loans to the Borrower hereunder and under the Ohio Note
up to an aggregate principal amount of $500,000. The principal amount
outstanding under the Ohio Note shall decrease the aggregate principal amount
available for the Revolving Credit Loans hereunder by a corresponding amount.

         This Note was executed in Columbus, Ohio as of the date first written
above.

- --------------------------------------------------------------------------------
WARNING - BY SIGNING THIS PAPER YOU GIVE UP YOUR RIGHT TO NOTICE AND COURT
TRIAL. IF YOU DO NOT PAY ON TIME A COURT JUDGMENT MAY BE TAKEN AGAINST YOU
WITHOUT YOUR PRIOR KNOWLEDGE AND THE POWERS OF A COURT CAN BE USED TO COLLECT
FROM YOU REGARDLESS OF ANY CLAIMS YOU MAY HAVE AGAINST THE CREDITOR WHETHER FOR
RETURNED GOODS, FAULTY GOODS, FAILURE ON HIS PART TO COMPLY WITH THE AGREEMENT,
OR ANY OTHER CAUSE.
- --------------------------------------------------------------------------------

                                      NEOPROBE CORPORATION


                                      By:  /s/ David C. Bupp
                                           -----------------
                                      Name: David C. Bupp
                                      Its: President and Chief Executive Officer



                                       12
<PAGE>   13


         SCHEDULE 5.11: PAST DUE INDEBTEDNESS AND POTENTIAL OBLIGATIONS

<TABLE>
<CAPTION>
                                                                                        Amount as
Counterparty                        Description                                         of August 31, 1999
- ------------                        -----------                                         ------------------

<S>                                 <C>                                                 <C>
OSU Research Foundation             past due RIGS-related trade payable                    $177,000 (1)
                                    under research and development
                                    agreement

DSM Biologics                       past due RIGS-related trade payable                    $277,717 (2)
                                    under manufacturing and supply
                                    agreement



Aries Master Fund and               potential obligation due to possible                 $3,600,000 (3)
Aries Domestic Fund LP              default under February 16, 1999
                                    Preferred Stock and Warrant Purchase
                                                                         Agreement

Various vendors of                  past due vendor payments primarily                     $892,612 (4)
Neoprobe (Israel) Ltd.              associated with construction of
                                    Neoprobe (Israel) Ltd.'s
                                    radiolabeling facility at Dimona, Israel
</TABLE>


Notes:

(1)      Neoprobe negotiated a settlement with this party for $120,000 payable
         over six months starting 8/31/99.
(2)      Neoprobe has negotiated a tentative settlement with this party for
         $170,000 payable over twelve months starting 9/30/99.
(3)      Amount is based on potential redemption amount of Preferred Stock
         should the Aries parties request redemption; however, Neoprobe has
         received no such request and is in discussions with Aries
         representatives to restructure this transaction

(4)      Neoprobe (Israel) Ltd. is in liquidation. Neoprobe Corporation does not
         anticipate paying these amounts at their full face value; however, the
         amounts have been reserved in the consolidated financial statements of
         Neoprobe Corporation should management decide to do so.



                                       13

<PAGE>   1
                                                                 Exhibit 10.4.42

                     AMENDED AND RESTATED SECURITY AGREEMENT


         THIS AMENDED AND RESTATED SECURITY AGREEMENT (the "Agreement"), is made
on December 31, 1999, by and between NEOPROBE CORPORATION, a Delaware
corporation ("Debtor"), and THE PROVIDENT BANK, an Ohio banking corporation
("Secured Party").

                                    RECITALS:

         WHEREAS, Secured Party has made, and intends to make in the future,
loans to the Debtor from time to time (collectively, the "Revolving Credit
Loans") pursuant to a $400,000 Revolving Credit Note and a $100,000 Revolving
Credit Note, each dated as of the date hereof (the "Revolving Credit Notes");
and

         WHEREAS, Debtor will use the proceeds of the Revolving Credit Loans to
the manufacture of specific units pursuant to a purchase order received from
Ethicon Endo Surgery, Inc.; and

         WHEREAS, Secured Party agreed to make the Revolving Credit Loans on the
condition that Debtor would provide security for the Revolving Credit Loans; and

         WHEREAS, Debtor agrees to grant to and create in favor of Secured
Party, in the manner set forth in this Agreement, security interests in certain
property of Debtor as security for the performance and payment of the Secured
Obligations (as defined in Section 1 hereof).

         NOW THEREFORE, for and in consideration of the Revolving Credit Loans
to Debtor and the benefits Debtor receives from them, the representations,
warranties, and mutual covenants set forth in this Agreement, the parties
hereto, intending to be legally bound, hereby agree as follows:

         Section 1. DEFINED TERMS.

                  1.1. DEFINITIONS. Certain capitalized words and terms as used
in this Agreement shall have the meanings given to them in the Uniform
Commercial Code unless otherwise indicated herein or the context or use
indicates another or different meaning or intent. All defined terms shall be
equally applicable to both the singular and plural forms of any of the words and
terms herein defined. In addition, the following capitalized words shall have
the following meanings when used herein:

         "Accounts" has the meaning assigned to that term in the Uniform
Commercial Code.

         "Chattel Paper" has the meaning assigned to that term in the Uniform
Commercial Code.



<PAGE>   2

         "Event of Default" shall mean the failure of the Debtor to comply with
any of the terms of this Agreement or to repay the Revolving Credit Loans at the
times required by the Revolving Credit Notes.

         "GAAP" means generally accepted accounting principles, as from time to
time in effect, applied throughout any applicable period on a basis consistent
with the accounting principles reflected in Guarantor's financial statements.

         "General Intangibles" has the meaning assigned to that term in the
Uniform Commercial Code excluding all rights of Debtor in intellectual property,
goodwill, trademarks, trade names, service marks, copyrights, patents, and
licenses and in applications therefor.

         "Instruments" has the meaning assigned to that term in the Uniform
Commercial Code.

         "Inventory" has the meaning assigned to that term in the Uniform
Commercial Code.

         "Lease" means any lease or other agreement (however denominated)
providing for the use by one person of real or personal property owned by
another person (or the entering into such a lease or agreement).

         "Loan Documents" means this Agreement, the Revolving Credit Notes and
all other instruments or agreements required or contemplated hereby or thereby
or evidencing the Revolving Credit Loans.

         "Permitted Liens" are those liens set forth in Section 13 hereof.

         "Premises" has the meaning assigned that term in Section 2.3.1 hereof.

         "Rentals" means with respect to any Lease, for any period, the
aggregate of all amounts required to be paid by the lessee thereunder for such
period, whether or not designated in such Lease as rentals or otherwise.

         "Revolving Credit Loans" has the meaning assigned that term in the
first Recital hereof.

         "Revolving Credit Notes" has the meaning assigned that term in the
first Recital hereof.

         "Secured Obligations" means (a) all principal and interest due and
payable for the Revolving Credit Loans made under the Revolving Credit Notes and
(b) all costs and expenses incurred by Secured Party in the realization upon the
Collateral, including without limitation reasonable attorneys' fees and legal
expenses.

         "Uniform Commercial Code" means Chapters 1301 through 1309 of the Ohio
Revised Code as the same may be from time to time supplemented or amended
hereafter.


                                      -2-
<PAGE>   3


     Section 2. CREATION OF SECURITY INTERESTS. As security for the full and
timely discharge of the Secured Obligations in accordance with their respective
terms, Debtor agrees that Secured Party will have, and there is hereby granted
to and created in favor of Secured Party, a security interest under the Uniform
Commercial Code, and otherwise in accordance with applicable law, in and to the
following (hereinafter collectively referred to as the "Collateral"):

          2.1. All Accounts and General Intangibles now or hereafter owned by
Debtor, including, without limitation, (i) all moneys due and to become due
under any contractual obligation, (ii) any damages arising out of or for breach
or default in respect of any Account and (iii) all other amounts from time to
time paid or payable under or in connection with any such Account; but
specifically excluding all rights of Debtor in intellectual property, goodwill,
trademarks, trade names, service marks, copyrights, patents, and licenses and in
applications therefor.

               2.2. All Goods and Inventory now or hereafter owned by Debtor.

               2.3. All Instruments and Chattel Paper now or hereafter owned by
Debtor.

               2.4. To the extent not otherwise included, all other personal
property, tangible or intangible, of Debtor other than tools and dies used in
the production of Inventory.

               2.5. To the extent not otherwise included, all books and records
pertaining to the foregoing, and all Proceeds or products of any or all of the
foregoing.

     Section 3. RIGHTS AND REMEDIES OF A SECURED PARTY. In addition to all of
the rights and remedies given to Secured Party by this Agreement, Secured Party
shall have all of the rights and remedies of a secured party under the Uniform
Commercial Code.

     Section 4. PROVISIONS APPLICABLE TO THE COLLATERAL. The parties agree that
the following provisions shall be applicable to the Collateral and Debtor agrees
that during the term of this Agreement:

          4.1. BOOKS AND RECORDS; CHIEF EXECUTIVE OFFICES.

               4.1.1. Debtor shall keep accurate and complete books and records
concerning the Collateral in accordance with GAAP. For the purpose of
establishing the location and value of the Collateral, Debtor shall furnish to
Secured Party, at such times and in such form and substance as may be requested
by Secured Party, information adequate to identify the Collateral, including,
without limitation, the location, cost and fair market value of the Collateral.



                                      -3-
<PAGE>   4

               4.1.2. (a) Debtor represents and warrants that its chief
executive office is located at the address set forth below:

                               Neoprobe Corporation
                               425 Metro Place North, Suite 300
                               Dublin, Ohio  43017

                    (b) Debtor shall not move its chief executive office except
to such new location as it may establish in accordance with Section 4.1.5 below.

               4.1.3. (a) The only original books of account and records of
Debtor relating to the Collateral are, and will continue to be, kept at the
offices of Debtor set forth in Section 4.1.2 above.

                    (b) The location where such books of account and records are
kept shall not be changed by Debtor except in accordance with Section 4.1.5
below.

               4.1.4. Debtor represents and warrants that the location of all
the Collateral is accurately and completely set forth in Exhibit A hereto.

               4.1.5. Debtor shall not establish any different location for its
chief executive office or for the place where the original books of account and
records of Debtor relating to the Collateral are kept until (a) it shall have
given to Secured Party written notice, 10 days before doing so, of its intention
to establish such new location, clearly describing each such new location and
providing any other information in connection therewith that Secured Party may
reasonably request, and (b) with respect to each such new location, it shall
have taken such action, satisfactory to Secured Party (including without
limitation all action required by Section 5 of this Agreement), as may be
necessary to maintain the security interest of Secured Party in the Collateral
at all times fully perfected and in full force and effect.

               4.1.6. Debtor shall not hold its right, title or interest or
maintain its records relating to any Collateral or invoice any Account debtor
with respect to any Collateral in any name other than its own proper corporate
name.

          4.2. INSPECTION. Debtor shall permit any persons designated by Secured
Party, in order to permit Secured Party to assure itself of performance by
Debtor of the Secured Obligations or otherwise facilitate compliance with this
Agreement, to enter, examine, audit and inspect the Collateral and all
properties, corporate books and financial records pertaining to the Collateral
or to the operation, business, affairs and financial condition of Debtor, at any
reasonable time and from time to time, and shall permit such persons to copy (by
photocopy or otherwise) and make excerpts of such books and records.

          4.3. NOTICE OF ADVERSE CHANGE. Debtor shall immediately notify Secured
Party of any adverse change of which Debtor has knowledge which adversely
affects or may adversely affect its right, title, or interest in, or the value
of, the Collateral.



                                      -4-
<PAGE>   5

          4.4. SALE OF INVENTORY. Notwithstanding the security interest in the
Collateral granted hereunder, Debtor shall have the right to sell, lease or
otherwise dispose of its Inventory in the ordinary course of its business free
and clear of such security interest; but in such event, such security interest
shall continue in the proceeds of such sale, lease or other disposition.

          4.5. ACCOUNT VERIFICATION. Secured Party may at any time, cause Debtor
to verify with any Account debtor of Debtor as to the status of any Accounts
payable by such Account debtor. The Debtor shall direct the Account debtor to
furnish a written response to the request for verification to a post office box
at a post office located in Columbus, Ohio, which post office box shall be
controlled by Secured Party. Prior to the occurrence of an Event of Default
Secured Party shall make no request for verification directly with the Account
debtor. Debtor from time to time will execute and deliver such instruments and
take all such action as Secured Party may reasonably request in order to
effectuate the purposes of this Section 4.5.

          4.6. THE DEBTOR'S RIGHTS TO COLLECT ACCOUNTS. Notwithstanding any
security interest in Accounts of Debtor granted hereunder, Debtor shall have the
right to and shall endeavor to collect such Accounts at its own cost and
expense, until such time as Secured Party shall have notified Debtor pursuant to
Section 4.7 below that Secured Party has revoked Debtor's right to collect such
Accounts.

          4.7. COLLECTION OF ACCOUNTS BY THE SECURED PARTY. If an Event of
Default shall have occurred and be continuing, Secured Party shall have the
right at any time and without affecting the liability of Debtor to Secured Party
(a) to revoke any right of Debtor to collect its Accounts pursuant to Section
4.6 above by written notice to Debtor to such effect, (b) to take over and
direct collection of such Accounts of Debtor, (c) to give notice of the security
interest of Secured Party in such Accounts to any or all of the Account debtors
obligated to Debtor, (d) to direct such Account debtors to make payment of such
Accounts directly to Secured Party and (e) to take control of such Accounts of
Debtor and the proceeds thereof, and to take possession of all of Debtor's books
and records relating thereto, with full power and authority in the name of
Secured Party or of Debtor to enforce, collect, sue for, receive, and give
receipts for any and all such Accounts. If any Account becomes evidenced by or
if Debtor receives any promissory notes, trade acceptance, chattel paper or
other writing or instrument for the payment of money, Debtor will deliver each
such writing or instrument to Secured Party duly endorsed to the order of
Secured Party as additional Collateral under this Agreement.

     Section 5. PRESERVATION AND PROTECTION OF SECURITY INTERESTS. Debtor shall
faithfully preserve and protect Secured Party's security interest in the
Collateral and shall, at its own cost and expense, cause such security interest
to be perfected and continue perfected so long as the Secured Obligations or any
portion thereof are outstanding and unpaid, and for such purpose Debtor shall
from time to time at the request of Secured Party file or record, or cause to be
filed or recorded, such instruments, documents and notices, including without
limitation financing and continuation statements, as Secured Party may deem
necessary or advisable from time to time in order to preserve, perfect and
continue perfected said security interest prior to the rights of any secured
party or lien creditor. Debtor shall do all such other acts and things and shall
execute and deliver



                                      -5-
<PAGE>   6

all such other instruments and documents, including without limitation further
security agreements, pledges, endorsements, assignments and notices, as Secured
Party may deem necessary or advisable from time to time in order to perfect and
preserve the priority of said security interest as a perfected lien in the
Collateral prior to the rights of any secured party or lien creditor. Secured
Party, and its officers, employees and authorized agents, or any of them, are
hereby irrevocably appointed the attorneys-in-fact of Debtor to do all acts and
things which Secured Party may deem necessary or advisable to preserve, perfect
and continue perfected Secured Party's security interest in the Collateral,
including without limitation the signing of financing, continuation or other
similar statements and notices on behalf of Debtor.

     Section 6. APPLICATION OF MONEYS. Except as otherwise provided in this
Agreement, if an Event of Default shall have occurred, all net proceeds which
Secured Party shall receive upon realization of the lien and security interest
granted under this Agreement may be applied by or at the direction of Secured
Party, after deducting all reasonable costs and expenses of every kind incurred
therein or incidental to the care, safekeeping or otherwise of any and all of
the Collateral or in any way relating to the rights of Secured Party hereunder,
including reasonable attorneys' fees and legal expenses, to the payment in whole
or in part of the Secured Obligations, in such order as Secured Party may elect.
Any surplus remaining after the payment and satisfaction of all of the Secured
Obligations shall be applied to or on the order of Debtor, its successors or
assigns, or to the person or persons who may be lawfully entitled to receive the
same, or as any court of competent jurisdiction may direct.

     Section 7. REPRESENTATIONS AND WARRANTIES. Debtor hereby represents and
warrants to Secured Party as follows:

          7.1. TITLE TO PROPERTY. Debtor has legal title to all the Collateral,
subject to no liens, other than Permitted Liens. No financing or continuation
statement which names Debtor as debtor has been filed under the Uniform
Commercial Code other than pursuant to the Permitted Liens and Debtor has not
agreed or consented to cause or to permit in the future (upon the happening of a
contingency or otherwise) any of its property, whether now owned or hereafter
acquired, to be subject to any lien, except the Permitted Liens.

          7.2. NO EVENT OF DEFAULT. There does not exist any condition or
circumstance which constitutes, or with the lapse of time or the giving of
notice or both would constitute, an Event of Default.

          7.3. INSURANCE. All of the properties and operations of Debtor of a
character usually insured by persons of established reputation engaged in the
same or a similar business similarly situated are adequately insured by
financially sound and reputable insurers, against loss or damage of the kinds
and in the amounts customarily insured against by such persons; and Debtor
carries with such insurers in customary amounts, such other insurance, including
public and product liability insurance, as is usually carried by persons of
established reputation engaged in the same business as Debtor or a similar
business similarly situated.



                                      -6-
<PAGE>   7

          7.4. PERFECTION OF SECURITY INTERESTS. As of the date of this
Agreement, Debtor has taken or caused to be taken all actions necessary in order
to establish Secured Party's security interests in the Collateral as valid and
perfected liens, prior to all other liens.

          7.5. SUBSIDIARIES. Debtor has no subsidiaries (other than Neoprobe
Europe AB and Neoprobe Israel AB, both of which are currently being liquidated
by Debtor) and has no loans, advances or capital contributions to any person
presently outstanding.

     Section 8. AFFIRMATIVE COVENANTS. On and after the date of this Agreement,
and for so long as any Secured Obligation is outstanding:

          8.1. PRESERVATION OF CORPORATE EXISTENCE. Debtor shall preserve and
maintain its corporate existence, rights, franchises and privileges in the
jurisdiction of its incorporation and will qualify and remain qualified as a
foreign corporation in each jurisdiction in which such qualification is
necessary or desirable in view of its business and operations or for the
ownership of its properties.

          8.2. MAINTENANCE OF PROPERTIES. Debtor shall maintain and preserve in
good working order and condition, ordinary wear and tear excepted, all of its
properties which are necessary or useful in the proper conduct of its business,
and will from time to time make all necessary and proper repairs, renewals,
replacements, additions and improvements to said properties, subject to Sections
2.2 and 2.3 of this Agreement.

          8.3. KEEPING OF RECORDS AND BOOKS OF ACCOUNT. Debtor shall keep
adequate records and books of account in which complete entries will be made in
accordance with GAAP, reflecting all financial transactions of Debtor relating
to the Collateral.

          8.4. NOTICE OF DEFAULT. If Debtor has knowledge that any Event of
Default occurs, Debtor shall give prompt notice in writing of such happening to
Secured Party.

          8.5. PERFORMANCE OF CONTRACTS, ETC. Debtor shall perform according to
and shall comply with those contractual obligations of Debtor, non-performance
of which would adversely affect the business of Debtor or would impair the
ability of Debtor to perform this Agreement.

          8.6. ADDITIONAL INFORMATION. Debtor shall furnish to Secured Party
promptly after Secured Party's request therefor, such other information
respecting the business, properties or condition of operations, financial or
otherwise, of Debtor as may be requested by Secured Party.

          8.7. INSURANCE. Debtor shall at all times:

               8.7.1. Maintain or cause to be maintained insurance upon its
property with responsible and reputable insurers of such character and in such
amounts as are usually maintained by persons engaged in a like business.



                                      -7-
<PAGE>   8

               8.7.2. Furnish to Secured Party a statement of insurance coverage
of Debtor in form and detail satisfactory to Secured Party.

               8.7.3. Require each policy of insurance to contain loss payable
provisions in favor of and satisfactory to Secured Party and a provision
requiring at least 30 days' prior written notice to Secured Party in the event
of any cancellation or contemplated cancellation of such insurance. To the
extent reasonably obtainable without additional cost to Debtor, all such
policies will further contain agreements by the insurers that any loss will be
payable to Secured Party notwithstanding any acts or negligence by Debtor or its
subsidiaries which might otherwise result in forfeiture of said insurance. If
Debtor fails to maintain in full force and effect insurance covering the
Collateral as may be required by this Section 8.7, or fails to pay the premiums
thereon when due, Secured Party may do so for the account of Debtor and add the
cost thereof to the Secured Obligations.

               8.7.4. Secured Party shall not be under any duty to ascertain the
existence or adequacy of insurance coverage. Debtor hereby assigns and sets over
unto Secured Party all moneys which may become payable on account of such
insurance covering the Collateral including without limitation any return of
unearned premiums which may be due upon cancellation of any such insurance, and
directs the insurers to pay Secured Party any amount so due. Secured Party, its
officers, employees and authorized agents, are hereby irrevocably appointed the
attorneys-in-fact of Debtor to endorse any draft or check which may be payable
to Debtor in order to collect the proceeds of such insurance or any return of
unearned premiums. Any balance of insurance proceeds remaining in the possession
of Secured Party after payment in full of the Secured Obligations shall be paid
to Debtor or Debtor's order as Debtor shall instruct Secured Party.

          8.8. RISK OF LOSS. As of the execution of this Agreement, Debtor shall
assume all risk of loss of, damage to, or destruction of the Collateral to the
extent that Debtor now or hereafter has or acquires any right, title and
interest in the Collateral.

          8.9. MAINTENANCE OF COLLATERAL.

               8.9.1. Debtor shall (a) pay and discharge all taxes, assessments,
fees, and other governmental charges or levies imposed upon it as well as all
lawful claims of materialmen, mechanics, carriers, warehousemen, landlords and
other similar persons for labor, materials, supplies and rentals which, if
unpaid, might by law become a lien on the Collateral or any part thereof and (b)
perform according to and maintain in force all leases which are Collateral;
PROVIDED, HOWEVER, that Debtor shall not be required to make any payment
pursuant to this Section 8.9 if (x) the amount, applicability, or validity
thereof is being contested currently in good faith by appropriate proceedings,
(y) Debtor shall have set aside on its books, in accordance with GAAP applied on
a consistent basis, adequate reserves or provisions with respect thereto, and
(z) the title of Debtor to, and its right to use, any of its properties is not
materially and adversely affected thereby.



                                      -8-
<PAGE>   9

               8.9.2. If Debtor fails to make any payments it is required to
make under this Section 8.9, Secured Party may do so for the account of Debtor
and may add the amount of such payments to the Secured Obligations.

          8.10. USE OF COLLATERAL. The Collateral will be used exclusively in
the business operations of Debtor.

          8.11. ANNUAL CERTIFICATE. Debtor shall furnish to Secured Party as
soon as practicable after the end of each fiscal year of Debtor, and in any
event within 90 days thereafter, a certificate by the chief executive officer or
the president of Debtor in form and substance satisfactory to Secured Party,
addressed to Secured Party and stating that based upon the law in effect on the
date of such certificate, no filing, registration or recording of any financing
statement, amendments thereto, continuation statements or instruments of a
similar character relating to the Collateral is required by law or will be
required by law during the 12 calendar months commencing on the next following
anniversary date in order to preserve and protect the priority of the security
interest of Secured Party as a perfected security interest in the Collateral
prior to the rights of any other secured party or lien creditor, or if such
filing, registration, recording, refiling, reregistration or rerecording is
necessary or will be necessary during the 12 calendar months commencing on the
next following anniversary date, setting forth the requirements in respect
thereto. Promptly after any filing, recording, refiling or rerecording of any
such financing statement or amendment thereto or continuation statement or
instrument, Debtor shall deliver to Secured Party another certificate by the
chief executive officer or president, stating that such filing, registration,
recording, refiling, reregistration or rerecording has been duly accomplished
and setting forth the particulars thereof.

     Section 9. NEGATIVE COVENANTS. On and after the date of this Agreement and
so long as Secured Obligations are outstanding, Debtor shall not:

          9.1. MERGERS, CONSOLIDATIONS, ETC. Merge with or into or consolidate
with any entity; PROVIDED, HOWEVER, that Debtor may merge or consolidate with
another entity so long as the obligations hereunder are assumed by the surviving
entity.

          9.2. NEGATIVE PLEDGE. Without the prior written consent of Secured
Party (a) sell, assign, or transfer any of its right, title and interest in the
Collateral except the sale of Debtor's Inventory in the ordinary course of
business, (b) grant or create or permit to exist any lien on or in any of the
Collateral except for Permitted Liens, (c) permit any levy or attachment to be
made against any of the Collateral, or (d) file any financing statement with
respect to any of the Collateral.

          9.3. CHANGE OF NAME. Change its corporate name.

          9.4. TRANSFER ASSETS. Transfer any assets to, make any advances to or
make any investments in Neoprobe Europe AB and Neoprobe Israel AB



                                      -9-
<PAGE>   10

     Section 10. CARE AND MAINTENANCE OF COLLATERAL BY THE SECURED PARTY.
Secured Party shall be deemed to have exercised reasonable care in the custody
and preservation of such of the Collateral as may be in Secured Party's
possession if Secured Party takes such action for that purpose as Debtor shall
request in writing, PROVIDED, HOWEVER that Secured Party shall not be required
to take any such requested action if in the judgment of Secured Party, such
action would impair Secured Party's security interest in such Collateral or its
rights in, or the value of, such Collateral, and PROVIDED, FURTHER, HOWEVER that
such written request is received by Secured Party in sufficient time to permit
Secured Party to take the requested action. Debtor acknowledges that failure of
Secured Party to comply with any such request shall not of itself be deemed a
failure to exercise reasonable care, and no failure of Secured Party to preserve
or protect any rights with respect to such Collateral against prior parties, or
to do any act with respect to the preservation of such Collateral not so
requested by Debtor, shall be deemed a failure to exercise reasonable care in
the custody or preservation of such Collateral. If all or any part of the
Collateral consists of any stock, bond or other security, Secured Party shall be
under no obligation to sell or otherwise dispose of such security, or to cause
such security to be sold or otherwise disposed of, by reason of any diminution
in the fair market value thereof, and Secured Party's failure to do so shall
under no circumstances be deemed a failure to exercise reasonable care in the
custody and preservation of the Collateral, anything in this Section 10 or in
any other section of this Agreement notwithstanding.

     Section 11. REMEDIES FOR EVENT OF DEFAULT.

          11.1. REMEDIES. If an Event of Default occurs, in addition to the
remedies set forth in the Agreement and the other Loan Documents:

               11.1.1. Secured Party may exercise such rights and remedies as
are provided by the Uniform Commercial Code, including without limitation the
right to enter any premises where any of the Collateral is located and take
possession of the same without demand or notice and without prior judicial
hearing or legal proceedings, which Debtor hereby expressly waives, and to sell
all or any portion of the Collateral at public or private sale, without prior
notice to Debtor except as otherwise required by law (and if notice is required
by law, after 10 days' prior written notice), at such place or places and at
such time or times and in such manner and upon such terms, whether for cash or
on credit, as Secured Party in its sole discretion may determine. Upon any such
sale of any of the Collateral, Secured Party may purchase all or any of the
Collateral being sold, free from any equity or right of redemption. Secured
Party shall apply the proceeds of any such sale to the Secured Obligations as
provided in Section 6 hereof. If such proceeds are insufficient to pay the
amounts owed by Debtor, Debtor shall be liable for any deficiency in the amount
so realized from the Collateral.

               11.1.2. Debtor shall, upon the demand of Secured Party, promptly
assemble the Collateral, or any part thereof and make it available to Secured
Party at a place to be designated by Secured Party which shall be reasonably
convenient to Secured Party and Debtor. The right of Secured Party under this
Section 11.1.2 to have the Collateral assembled and made available to it is of
the essence of this Agreement and Secured Party may, at its election, enforce
such right by an action for specific performance.



                                      -10-
<PAGE>   11

          11.2. NO REQUIREMENT TO MARSHAL COLLATERAL. Debtor, to the extent that
it has any right, title or interest in any of the Collateral, waives and
releases any right to require Secured Party to collect any of the Secured
Obligations from any portion of the Collateral under any theory of marshaling of
assets, or otherwise, and specifically authorizes Secured Party to apply any of
its Collateral against any of the Secured Obligations in any manner that Secured
Party may determine.

     Section 12. AMENDMENTS, WAIVERS. No amendment, modification or waiver to
this Agreement shall be binding unless in writing and signed by the party to be
charged.

     Section 13. PERMITTED LIENS. Liens arising from purchase money security
interests so long as (a) the lien is for no more than 90% of the purchase price
of the property and (b) such lien attaches only to the property acquired by
Debtor in connection therewith shall be deemed "Permitted Liens."

     Section 14. DEFEASANCE. Upon payment and performance in full of the Secured
Obligations, and all reasonable costs and expenses incurred by Secured Party in
the realization upon the Collateral, including without limitation, reasonable
attorneys' fees and legal expenses, this Agreement shall terminate and be of no
further force and effect, and in such event, Secured Party shall, at the expense
of Debtor, take all action necessary to terminate the security interests of
Secured Party in the Collateral. Until such time, however, this Agreement shall
be binding upon and inure to the benefit of the parties hereto and their
respective successors and assigns.

     Section 15. GOVERNING LAW. This Agreement is being executed and delivered
in the State of Ohio and, except to the extent that the laws of any other
jurisdiction are mandatorily applicable, shall in all respects be interpreted in
accordance with the laws of the State of Ohio applicable to contracts to be
performed in the State of Ohio.

     Section 16. COUNTERPARTS. This Agreement may be signed in any number of
counterparts, all of which taken together shall constitute one and the same
instrument.

     Section 17. ENTIRE AGREEMENT. This Agreement sets forth the entire
understanding of the parties hereto and supersedes any and all prior agreements,
arrangements, and understandings relating to the subject matter hereof. No
representation, promise, inducement, or statement of intent has been made by any
party which is not embodied in this Agreement, and no party shall be bound by or
be liable for any alleged representation, promise, inducement or statement of
intention not embodied herein.

         Section 18. ENFORCEABILITY. Any provision of this Agreement which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof or affecting the validity or
enforceability of such provisions in any other jurisdiction.



                                      -11-
<PAGE>   12

     Section 19. CAPTIONS. Captions and section headings used in this Agreement
are for convenience only and shall not affect the construction of this
Agreement.

     Section 20. CONFESSION OF JUDGMENT. The Debtor hereby authorizes any
attorney at law to appear for it, in an action on this Security Agreement, as
herein provided, in any court of record in or of the State of Ohio, or
elsewhere, to waive the issuing and service of process against the Debtor and to
confess judgment in favor of the holder of the Security Agreement against the
Debtor for the amount that may be due, with interest at the rate therein
mentioned and costs of suit, and to waive and release all errors in said
proceedings and judgment, and all petitions in error, and right of appeal from
the judgment rendered.

     Section 21. WAIVER OF JURY TRIAL. THE SECURED PARTY AND THE DEBTOR HEREBY
VOLUNTARILY, IRREVOCABLY AND UNCONDITIONALLY WAIVE ANY RIGHT TO HAVE A JURY
PARTICIPATE IN RESOLVING ANY DISPUTE, WHETHER SOUNDING IN CONTRACT, TORT, OR
OTHERWISE, BETWEEN THE SECURED PARTY AND THE GUARANTOR ARISING OUT OF, IN
CONNECTION WITH, RELATED TO, OR INCIDENTAL TO THE RELATIONSHIP ESTABLISHED
BETWEEN THE DEBTOR AND THE SECURED PARTY IN CONNECTION WITH THE SECURITY
AGREEMENT OR ANY OTHER AGREEMENT OR DOCUMENT EXECUTED OR DELIVERED IN CONNECTION
HEREWITH OR THEREWITH OR THE TRANSACTIONS RELATED HERETO OR THERETO. THIS
PROVISION IS A MATERIAL INDUCEMENT TO THE SECURED PARTY TO ENTER INTO THE
FINANCING TRANSACTIONS WITH DEBTOR. IT SHALL NOT IN ANY WAY AFFECT, WAIVE,
LIMIT, AMEND OR MODIFY THE SECURED PARTY'S ABILITY TO PURSUE ITS REMEDIES
INCLUDING, BUT NOT LIMITED TO, ANY CONFESSION OF JUDGMENT OR COGNOVIT PROVISION
CONTAINED HEREIN OR IN ANY OTHER DOCUMENT RELATED HERETO.

                                      -12-
<PAGE>   13


         The parties hereto have caused this Agreement to be duly executed by
their respective duly authorized officers as of the day and year first above
written.


WARNING - BY SIGNING THIS PAPER YOU GIVE UP YOUR RIGHT TO NOTICE AND COURT
TRIAL. IF YOU DO NOT PAY ON TIME A COURT JUDGMENT MAY BE TAKEN AGAINST YOU
WITHOUT YOUR PRIOR KNOWLEDGE AND THE POWERS OF A COURT CAN BE USED TO COLLECT
FROM YOU REGARDLESS OF ANY CLAIMS YOU MAY HAVE AGAINST THE CREDITOR WHETHER FOR
RETURNED GOODS, FAULTY GOODS, FAILURE ON HIS PART TO COMPLY WITH THE AGREEMENT,
OR ANY OTHER CAUSE.


                              NEOPROBE CORPORATION, a Delaware corporation


                              By:  /s/ David C. Bupp
                                  ---------------------
                              Name: David C. Bupp
                              Its: President and Chief Executive Officer

                              THE PROVIDENT BANK, an Ohio banking corporation


                              By:  /s/ Michael D. Davis
                                   ----------------------
                              Name: Michael D. Davis
                              Its:  Vice President


                                      -13-
<PAGE>   14


                                    EXHIBIT A


                             COLLATERAL AND LOCATION


Collateral                                        Location
- ----------                                        --------

Inventory                                Neoprobe Corporation
                                         425 Metro Place North, Suite 300
                                         Dublin, Ohio  43017

                                         Plexus / EAC
                                         55 Jewelers Park Drive
                                         Neenah, WI  54956

Collateral                               Neoprobe Corporation
                                         425 Metro Place North, Suite 300
                                         Dublin, Ohio  43017





                                      -14-




<PAGE>   1
                                                                 Exhibit 10.4.43

                                 AMENDMENT NO. 1
                                       TO
                   AMENDED AND RESTATED REVOLVING CREDIT NOTE
                          DATED AS OF DECEMBER 31, 1999


         THIS AMENDMENT NO. 1 ("Amendment") is dated as of March 2, 2000,
between NEOPROBE CORPORATION, a Delaware corporation, whose address is 425 Metro
Place North, Suite 400, Dublin, Ohio 43017 (the "Borrower"), hereby promises to
pay to the order of THE PROVIDENT BANK, an Ohio banking corporation ("Bank").

                                   WITNESSETH:

         WHEREAS, the Borrower issued to the Bank, parties to that certain
Amended and Restated Revolving Credit Note dated as of December 31, 1999 in the
amount of $400,000 (the "Revolving Note") have agreed to amend the Revolving
Note on the terms and conditions hereinafter set forth. Terms not otherwise
defined herein are used as defined in the Agreement or the Revolving Note as
amended hereby.


         NOW, THEREFORE, the Borrower and the Bank hereby agree as follows:

         SECTION 1. AMENDMENT OF THE REVOLVING NOTE. The Revolving Note is,
effective the date hereof, hereby amended as follows:

         Section 1.1. The definition of "Maturity Date" in the introductory
paragraph of the Revolving Note is hereby amended by deleting "February 29,
2000" and substituting in its place "May 31, 2000."

         SECTION 2. GOVERNING LAW. This Amendment shall be governed by and
construed in accordance with the laws of the State of Ohio.

         SECTION 3. COSTS AND EXPENSES. The Borrower hereby agrees to pay on
demand all costs and expenses of the Bank in connection with the preparation,
execution and delivery of this Amendment and the other documents to be delivered
in connection herewith, including, without limitation, the reasonable fees and
out-of-pocket expenses of counsel to the Bank with respect thereto.

         SECTION 4. COUNTERPARTS. This Amendment may be executed in any number
of counterparts and by different parties hereto in separate counterparts, each
of which when so executed shall be deemed to be an original and all of which
when taken together shall constitute one and the same agreement.

         SECTION 5. CONFESSION OF JUDGMENT. The Borrower hereby authorizes any
attorney at law to appear for the Borrower, in an action hereon, at any time
after the same becomes due, as herein provided, in any court of record in or of
the State of Ohio, or elsewhere, to waive the issuing and service of process
against the Borrower and to confess judgment in favor of the holder hereof or
the party entitled to the benefits hereof against the Borrower for the amount
that may be due, with interest at the rate herein mentioned and costs of suit,
and to waive and
<PAGE>   2

release all errors in said proceedings and judgment, and all petitions in error,
and right of appeal from the judgment rendered.

         Borrower has executed this Amendment as of the date first above
written.

- --------------------------------------------------------------------------------

WARNING - BY SIGNING THIS PAPER YOU GIVE UP YOUR RIGHT TO NOTICE AND COURT
TRIAL. IF YOU DO NOT PAY ON TIME, A COURT JUDGMENT MAY BE TAKEN AGAINST YOU
WITHOUT YOUR PRIOR KNOWLEDGE AND THE POWERS OF A COURT CAN BE USED TO COLLECT
FROM YOU REGARDLESS OF ANY CLAIMS YOU MAY HAVE AGAINST THE CREDITOR WHETHER FOR
RETURNED GOODS, FAULTY GOODS, FAILURE ON HIS PART TO COMPLY WITH THE AGREEMENT,
OR ANY OTHER CAUSE.


- --------------------------------------------------------------------------------


                                   NEOPROBE CORPORATION



                                   By:  /s/ David C. Bupp
                                        -----------------
                                   Name:  David C. Bupp
                                   Its:  President and Chief Executive Officer









<PAGE>   1
                                                                 Exhibit 10.4.44

                                 AMENDMENT NO. 1
                                       TO
                         TENNESSEE REVOLVING CREDIT NOTE
                          DATED AS OF DECEMBER 31, 1999


         THIS AMENDMENT NO. 1 ("Amendment") is dated as of March 2, 2000,
between NEOPROBE CORPORATION, a Delaware corporation, whose address is 425 Metro
Place North, Suite 400, Dublin, Ohio 43017 (the "Borrower"), hereby promises to
pay to the order of THE PROVIDENT BANK, an Ohio banking corporation ("Bank").

                                   WITNESSETH:

         WHEREAS, the Borrower issued to the Bank, parties to that certain
Tennessee Revolving Credit Note dated as of December 31, 1999 in the amount of
$100,000 (the "Revolving Note") have agreed to amend the Revolving Note on the
terms and conditions hereinafter set forth. Terms not otherwise defined herein
are used as defined in the Agreement or the Revolving Note as amended hereby.


         NOW, THEREFORE, the Borrower and the Bank hereby agree as follows:

         SECTION 1. AMENDMENT OF THE REVOLVING NOTE. The Revolving Note is,
effective the date hereof, hereby amended as follows:

                  Section 1.1. The definition of "Maturity Date" in the
introductory paragraph of the Revolving Note is hereby amended by deleting
"February 29, 2000" and substituting in its place "May 31, 2000."

         SECTION 2. GOVERNING LAW. This Amendment shall be governed by and
construed in accordance with the laws of the State of Ohio.

         SECTION 3. COSTS AND EXPENSES. The Borrower hereby agrees to pay on
demand all costs and expenses of the Bank in connection with the preparation,
execution and delivery of this Amendment and the other documents to be delivered
in connection herewith, including, without limitation, the reasonable fees and
out-of-pocket expenses of counsel to the Bank with respect thereto.

         SECTION 4. COUNTERPARTS. This Amendment may be executed in any number
of counterparts and by different parties hereto in separate counterparts, each
of which when so executed shall be deemed to be an original and all of which
when taken together shall constitute one and the same agreement.

         SECTION 5. CONFESSION OF JUDGMENT. The Borrower hereby authorizes any
attorney at law to appear for the Borrower, in an action hereon, at any time
after the same becomes due, as herein provided, in any court of record in or of
the State of Ohio, or elsewhere, to waive the issuing and service of process
against the Borrower and to confess judgment in favor of the holder hereof or
the party entitled to the benefits hereof against the Borrower for the amount
that may be due, with interest at the rate herein mentioned and costs of suit,
and to waive and
<PAGE>   2
release all errors in said proceedings and judgment, and all petitions in error,
and right of appeal from the judgment rendered.

         Borrower has executed this Amendment as of the date first above
written.

- --------------------------------------------------------------------------------
WARNING - BY SIGNING THIS PAPER YOU GIVE UP YOUR RIGHT TO NOTICE AND COURT
TRIAL. IF YOU DO NOT PAY ON TIME, A COURT JUDGMENT MAY BE TAKEN AGAINST YOU
WITHOUT YOUR PRIOR KNOWLEDGE AND THE POWERS OF A COURT CAN BE USED TO COLLECT
FROM YOU REGARDLESS OF ANY CLAIMS YOU MAY HAVE AGAINST THE CREDITOR WHETHER FOR
RETURNED GOODS, FAULTY GOODS, FAILURE ON HIS PART TO COMPLY WITH THE AGREEMENT,
OR ANY OTHER CAUSE.
- --------------------------------------------------------------------------------


                                     NEOPROBE CORPORATION



                                     By:  /s/ David C. Bupp
                                          -----------------
                                     Name:  David C. Bupp
                                     Its:  President and Chief Executive Officer








<PAGE>   1
                                                                    Exhibit 11.1

               NEOPROBE CORPORATION AND SUBSIDIARIES
                 COMPUTATION OF NET LOSS PER SHARE



<TABLE>
<CAPTION>
                                                                     Twelve Months Ended December 31,
                                                                   1999                 1998                 1997
                                                           ------------         ------------         ------------

<S>                                                        <C>                  <C>                  <C>
Loss attributable to common stockholders                   ($ 7,894,523)        ($28,032,752)        ($23,246,528)

Weighted average number of shares outstanding:

Weighted average common shares
 outstanding beginning of period                             22,887,910           22,763,430           22,586,527

Weighted average common shares
 issued during period                                           115,551               78,802              148,115
                                                           ------------         ------------         ------------


Weighted average number of shares outstanding
 used in computing basic net loss per share                  23,003,461           22,842,232           22,734,642
                                                           ============         ============         ============


Weighted average number of shares outstanding
 used in computing diluted net loss per share                23,003,461           22,842,232           22,734,642
                                                           ============         ============         ============


Loss per share attributable to common stockholders:
 Basic                                                     ($      0.34)        ($      1.23)        ($      1.02)
                                                           ============         ============         ============


 Diluted                                                   ($      0.34)        ($      1.23)        ($      1.02)
                                                           ============         ============         ============
</TABLE>


<PAGE>   1



                                                                   Exhibit 21.1



                           SUBSIDIARIES OF REGISTRANT

                   Neoprobe Europe AB, a Swedish corporation

         Neoprobe (Israel), Ltd., an Israeli limited liability company

                            Cira Technologies, Inc.





<PAGE>   1
Exhibit 23.1


                       CONSENT OF INDEPENDENT ACCOUNTANTS

We consent to the incorporation by reference in the Registration Statements of
Neoprobe Corporation and Subsidiaries listed below of our report dated February
20, 1998, on our audit of the consolidated statements of operations,
stockholders' equity, and cash flows of Neoprobe Corporation and Subsidiaries
for the year ended December 31, 1997, which report is included in this Annual
Report on the Form 10-K.

Form S-3 File No. 33-72700
Form S-3 File No. 33-73622
Form SB-2 File No. 33-86000
Form S-3 File No. 33-93438
Form S-3 File No. 33-93858
Form S-3 File No. 333-15989
Form S-8 File No. 33-70074
Form S-8 File No. 33-81410
Form S-8 File No. 333-05143



                                                      PricewaterhouseCoopers LLP


Columbus, Ohio
March 29, 2000



<PAGE>   1
                                                                    Exhibit 23.2



The Board of Directors
Neoprobe Corporation:

We consent to incorporation by reference in the registration statements on Form
S-3 (Nos. 33-72700, 33-73622, 33-93438, 33-93858, 333-15989), on Form SB-2 (No.
33-86000) and on Form S-8 (Nos. 33-70074, 33-81410, and 333-05143) of Neoprobe
Corporation of our report dated February 14, 2000, relating to the consolidated
balance sheets of Neoprobe Corporation and subsidiaries as of December 31, 1999
and 1998, and the related consolidated statements of operations, stockholders'
equity and comprehensive income (loss), and cash flows for the years then ended,
which report appears in the December 31, 1999, annual report on Form 10-K of
Neoprobe Corporation.


                                                  /s/ KPMG LLP

Columbus, Ohio
March 30, 1999


<PAGE>   1
                                                                    Exhibit 24.1

                                POWER OF ATTORNEY


The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
orporation (the "Company");

Does hereby constitute and appoint David C. Bupp and Brent L. Larson to be his
agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

Each agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.




                                      /s/ Melvin D. Booth
                                      ------------------------------------
                                               Melvin D. Booth


<PAGE>   2


                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint Brent L. Larson to be his agent and
attorney-in-fact;

With the power to act fully hereunder and with full power of substitution to act
in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

The agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.




                                        /s/David C. Bupp
                                        ---------------------------------------
                                                     David C. Bupp


<PAGE>   3


                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint David C. Bupp and Brent L. Larson to be his
agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

Each agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.




                                              /s/John S. Christie
                                              ----------------------------------
                                                            John S. Christie


<PAGE>   4


                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint David C. Bupp and Brent L. Larson to be his
agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

Each agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.




                                          /s/Julius R. Krevans
                                          --------------------------------------
                                                       Julius R. Krevans


<PAGE>   5


                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint David C. Bupp to be his agent and
attorney-in-fact;

With the power to act fully hereunder and with full power of substitution to act
in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

The agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.


                                             /s/Brent L. Larson
                                             -----------------------------------
                                                       Brent L. Larson


<PAGE>   6


                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint David C. Bupp and Brent L. Larson to be his
agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

Each agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.


                                            /s/Michael P. Moore
                                            ------------------------------------
                                                       Michael P. Moore


<PAGE>   7


                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint David C. Bupp and Brent L. Larson to be his
agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

Each agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.




                                       /s/J. Frank Whitley, Jr.
                                      ------------------------------------------
                                                  J. Frank Whitley, Jr.


<PAGE>   8



                                POWER OF ATTORNEY



The undersigned who is a director or officer of Neoprobe Corporation, a Delaware
corporation (the "Company");

Does hereby constitute and appoint David C. Bupp and Brent L. Larson to be his
agents and attorneys-in-fact;

Each with the power to act fully hereunder without the other and with full power
of substitution to act in the name and on behalf of the undersigned;

To sign and file with the Securities and Exchange Commission the Annual Report
of the Company on Form 10-K, and any amendments or supplements to such Annual
Report; and

To execute and deliver any instruments, certificates or other documents which
they shall deem necessary or proper in connection with the filing of such Annual
Report, and generally to act for and in the name of the undersigned with respect
to such filings as fully as could the undersigned if then personally present and
acting.

Each agent named above is hereby empowered to determine in his discretion the
times when, the purposes for, and the names in which, any power conferred upon
him herein shall be exercised and the terms and conditions of any instrument,
certificate or document which may be executed by him pursuant to this
instrument.

This Power of Attorney shall not be affected by the disability of the
undersigned or the lapse of time.

The validity, terms and enforcement of this Power of Attorney shall be governed
by those laws of the State of Ohio that apply to instruments negotiated,
executed, delivered and performed solely within the State of Ohio.

This Power of Attorney may be executed in any number of counterparts, each of
which shall have the same effect as if it were the original instrument and all
of which shall constitute one and the same instrument.

IN WITNESS WHEREOF, I have executed this Power of Attorney this 22nd day of
March, 2000.




                                       /s/James F. Zid
                                       ---------------------------------------
                                                  James F. Zid



<PAGE>   1
                             SECRETARY'S CERTIFICATE

         I, Brent L. Larson, certify that I am the duly elected, qualified and
acting Assistant Secretary of Neoprobe Corporation, a Delaware corporation (the
"Corporation"), that I am authorized and empowered to execute this Certificate
on behalf of the Corporation with respect to its Annual Report on Form 10-K for
the fiscal year ended December 31, 1999, and further certify that the following
is a true, complete and correct copy of a resolution adopted by the Board of
Directors of the Corporation on March 22, 2000, which resolution remains in full
force and effect as of the date of this certificate:

         RESOLVED, that each representative, officer or director who may be
         required to execute the Corporation's Annual Report on Form 10-K for
         the fiscal year ended December 31, 1999 and any amendment thereof be,
         and each of them hereby is, authorized to execute a Power of Attorney
         appointing David C. Bupp and Brent L. Larson as his true and lawful
         attorney and agent to execute in his name, place and stead (in any
         capacity) the Annual Report on Form 10-K and any amendments thereto,
         and all instruments necessary or in connection therewith, and to file
         the same with the Commission, each of which attorney and agent shall
         have the power to do and perform in the name of and on behalf of each
         said representative, officer and director, or both, as the case may be,
         every act whatsoever necessary or advisable to be done in the premises
         as fully and to all intents and purposes as such representative,
         officer or director might or could do in person.

         IN WITNESS WHEREOF, I have hereunto set my hand as of March 29, 2000.


                                            /s/ Brent L. Larson
                                            ------------------------------------
                                            Brent L. Larson, Assistant Secretary

<TABLE> <S> <C>

<ARTICLE> 5
<CIK> 0000810509
<NAME> NEOPROBE CORPORATION

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<PERIOD-START>                             JAN-01-1999
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                       4,882,537
<SECURITIES>                                         0
<RECEIVABLES>                                  550,788
<ALLOWANCES>                                    97,382
<INVENTORY>                                  1,134,427
<CURRENT-ASSETS>                             7,144,235
<PP&E>                                       2,167,245
<DEPRECIATION>                               1,264,299
<TOTAL-ASSETS>                              10,322,569
<CURRENT-LIABILITIES>                        6,147,243
<BONDS>                                         68,809
                                0
                                          0
<COMMON>                                        23,047
<OTHER-SE>                                   (162,066)
<TOTAL-LIABILITY-AND-EQUITY>                10,322,569
<SALES>                                      9,245,664
<TOTAL-REVENUES>                             9,445,664
<CGS>                                        4,507,774
<TOTAL-COSTS>                                4,507,774
<OTHER-EXPENSES>                             1,788,450
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              82,853
<INCOME-PRETAX>                            (4,173,987)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (4,173,987)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (4,173,987)
<EPS-BASIC>                                     (0.34)
<EPS-DILUTED>                                   (0.34)


</TABLE>


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