ENTREMED INC
10-K405, 1998-03-31
MEDICAL LABORATORIES
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                                   FORM 10-K


                       SECURITIES AND EXCHANGE COMMISSION

                            WASHINGTON, D. C., 20549

             ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934
                  For the fiscal year ended December  31, 1997

                        Commission file number  0-20713

                                 ENTREMED, INC.
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                                                        <C>
              Delaware                                                                 58-1959440               
- -------------------------------------------                                ----------------------------------   
         (State of Incorporation)                                          (I.R.S. Employer Identification No.) 
                                                                                                                
Suite 200, 9610 Medical Center Drive, Rockville, MD                                        20850                
- ----------------------------------------------------                                       -----                
   (Address of principal executive offices)                                             (Zip Code)              

Registrant's telephone number, including area code:   (301) 217-9858
- ----------------------------------------------------                

Securities registered pursuant to Section 12 (g) of the Act:

             Title                                                                  Name of Exchange  
             -----                                                                  ----------------  
Common Stock, Par Value $.01 Per Share                                          Nasdaq National Market
</TABLE>


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]

As of March 19, 1998, 12,372,104, shares of common stock were outstanding and
the aggregate market value of the shares of common stock held by non-affiliates
was approximately $157,978,350.



                      DOCUMENTS INCORPORATED BY REFERENCE

See Part III hereof with respect to incorporation by reference from the
registrant's definitive proxy statement to be filed pursuant to Regulation 14A
under the Securities Exchange Act of 1934 and the Exhibit Index hereto.

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                        ENTREMED, INC. AND SUBSIDIARIES
                FORM 10-K - FISCAL YEAR ENDED DECEMBER 31, 1997

Contents and Cross Reference Sheet

<TABLE>
<CAPTION>
    Form 10-K        Form 10-K                                                                      Form 10-K
    Part No.        Item No.                          Description                                   Page No.   
  ------------    ------------                        -----------                                 -------------
<S>                 <C>               <C>                                                           <C>
       I                1             Business
                                           The Company  . . . . . . . . . . . . . . . . . . . . . . .   3
                                           Corporate Strategy . . . . . . . . . . . . . . . . . . . .   5
                                           Angiogenesis . . . . . . . . . . . . . . . . . . . . . . .   5
                                           EntreMed's Antiangiogenesis Program  . . . . . . . . . . .   7
                                           EntreMed's Cell Permeation Technology  . . . . . . . . . .   9
                                           Collaborations and License Agreements  . . . . . . . . . .  11
                                           Competition  . . . . . . . . . . . . . . . . . . . . . . .  14
                                           Manufacturing and Marketing  . . . . . . . . . . . . . . .  16
                                           Patents and Proprietary Rights . . . . . . . . . . . . . .  16
                                           Government Regulation  . . . . . . . . . . . . . . . . . .  18
                                           Employees  . . . . . . . . . . . . . . . . . . . . . . . .  22
                                           Risk Factors . . . . . . . . . . . . . . . . . . . . . . .  22

                        2             Properties  . . . . . . . . . . . . . . . . . . . . . . . . . .  29
                        3             Legal Proceedings   . . . . . . . . . . . . . . . . . . . . . .  29
                        4             Submission of Matters to a Vote of Security Holders   . . . . .  30
      II                5             Market for Registrant's Common Equity and
                                      Related Stockholder Matters   . . . . . . . . . . . . . . . . .  30

                        6             Selected Financial Data   . . . . . . . . . . . . . . . . . . .  32
                        7             Management's Discussion and Analysis of
                                      Financial Conditions and Results of Operations
                                           Overview . . . . . . . . . . . . . . . . . . . . . . . . .  33
                                           Results of Operations  . . . . . . . . . . . . . . . . . .  33
                                           Liquidity and Capital Resources  . . . . . . . . . . . . .  34
                                           Year 2000  . . . . . . . . . . . . . . . . . . . . . . . .  36
                                           Impact of Recently Issued Accounting Standards . . . . . .  36
                                           Inflation  . . . . . . . . . . . . . . . . . . . . . . . .  36

                        8             Financial Statements  . . . . . . . . . . . . . . . . . . . . .  36
                        9             Changes in and Disagreements with Accountants
                                      on Accounting and Financial Disclosure  . . . . . . . . . . . .  37

      III            10 - 13          Incorporated by reference from the Company's Proxy Statement  .  37
      IV               14             Exhibits, Financial Statement Schedules and Reports
                                      on Form 8-K   . . . . . . . . . . . . . . . . . . . . . . . . .  37
                        
- ------------------------

Financial Statements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  F-1

Signatures  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  II - 1
</TABLE>





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         This document includes forward-looking statements within the meaning
of Section 27A of the Securities Act of 1933, as amended, and Section 21E of
the Securities Exchange Act of 1934, as amended ("Exchange Act").  All
statements in this Form 10-K that are not descriptions of historical facts are
forward-looking statements, based on management's estimates, assumptions and
projections, that are subject to risks and uncertainties.  Although the Company
believes that the expectations reflected in such forward-looking statements are
reasonable as of the date hereof, actual results could differ materially from
those currently anticipated due to a number of factors, including risks
relating to the early stage of products under development; uncertainties
relating to clinical trials; dependence on third parties; future capital needs;
and risks relating to the commercialization, if any, of the Company's proposed
products (such as marketing, safety, regulatory, patent, product liability,
supply, competition and other risks).  Additional important factors that could
cause actual results to differ materially from the Company's current
expectations are included in the Company's Securities and Exchange Commission
filings.  The Company assumes no obligation to update its forward-looking
statements.

                                     PART I

ITEM 1.  BUSINESS

THE COMPANY

         EntreMed, Inc. ("EntreMed" or the "Company") was organized in
September 1991 and is engaged primarily in the research and development of
biopharmaceutical products that address the role of angiogenesis in the
prevention and treatment of a broad range of diseases.

         The Company is an innovative biopharmaceutical company with a research
and product focus on the role of angiogenesis in disease.  Angiogenesis is the
biological process by which new blood vessels are formed and is a normal
process during the first three months of embryonic development, the
reproductive cycle of women, and in wound healing.  At other times,
angiogenesis is harmful when associated with pathology, particularly that of
cancer and macular degeneration, a leading cause of blindness. The Company
believes that antiangiogenic products, which inhibit the abnormal growth of
blood vessels, may have fewer adverse side effects than traditional therapies 
for these diseases. EntreMed's portfolio of potential therapeutics include the
anti-angiogenic compounds, Angiostatin(TM) protein, Endostatin(TM) protein,
2-Methoxyestradiol and thalidomide which are used to block the growth of blood
vessels supplying primary and metastatic tumors.

         In December 1995, the Company and Bristol-Myers Squibb Company
("Bristol-Myers Squibb") entered into a collaboration (the "BMS Collaboration")
to develop and commercialize certain antiangiogenic therapeutics. This
collaboration provides for Bristol-Myers Squibb to fund certain Company
research, provide milestone payments to the Company and pay the Company
royalties on net sales of any products developed under the collaboration.  In
addition, in December 1995 and June 1996 Bristol-Myers Squibb made equity
investments in the Company





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in an aggregate amount of $11,500,000. In return, the Company granted
Bristol-Myers Squibb exclusive worldwide rights to antiangiogenic applications
of thalidomide, thalidomide analogs and the Angiostatin(TM) protein and a
five-year right of first refusal to negotiate for commercial rights with respect
to the development of any technology licensed, or to be licensed, by the
Company from Children's Hospital, Boston, an affiliate of Harvard Medical
School, ("Children's Hospital"), in the field of antiangiogenic therapeutics.
See "Collaborations and License Agreements".

         The Company's product candidates have been developed primarily through
sponsored research collaborations and licensing agreements. The principal
antiangiogenic therapeutics currently under development by the Company were
licensed from Children's Hospital where the Company sponsors research under the
direction of Dr. M. Judah Folkman.  The Company's sponsored research programs
are augmented by its internal capabilities in the angiogenesis field.

         To date, the Company has:

         _       Licensed from Children's Hospital four antiangiogenic
                 molecules -  Angiostatin(TM) protein, thalidomide and
                 thalidomide analogs, Endostatin(TM) protein and
                 2-Methoxyestradiol.

         -       Licensed to Bristol-Myers Squibb Company commercial rights to
                 Angiostatin(TM) protein, thalidomide and thalidomide analogs.

         _       Isolated, identified, sequenced, cloned, and recombinantly
                 expressed Angiostatin(TM) protein in quantities sufficient for
                 preclinical studies. In preclinical studies, Angiostatin(TM)
                 protein appeared to inhibit vascularization and growth of
                 primary and metastatic tumors.

         _       Isolated, identified, sequenced, cloned, and recombinantly
                 expressed Endostatin(TM) protein in quantities sufficient for
                 preclinical studies. In preclinical studies, Endostatin(TM)
                 protein appeared to inhibit vascularization and growth of
                 primary and metastatic tumors.

         _       Initiated randomized Phase II clinical trials to evaluate the
                 antiangiogenic effects of thalidomide in inhibiting the
                 progression of age-related macular degeneration, a leading
                 cause of blindness.

         _       Initiated Phase II clinical trials to evaluate the
                 antiangiogenic effects of thalidomide in inhibiting the
                 progression of metastatic breast cancer.

         _       Received positive interim results in Phase II clinical trials
                 evaluating the antiangiogenic effects of thalidomide in
                 inhibiting the progression of brain cancer, prostate cancer,
                 and Kaposi's sarcoma.

         _       Reacquired commercial rights to thalidomide from Bristol-Myers
                 Squibb Company.

         _       Assayed in mice an orally administered thalidomide analog 
                 resulting in inhibition of metastatic mouse melanoma.

         





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         _       Signed letters of intent to collaborate with the National
                 Cancer Institute ("NCI") to undertake pharmacology and
                 toxicology studies and also to develop commercial production
                 methods for both Endostatin(TM) protein and
                 2-Methoxyestradiol.

         _       Demonstrated that orally administered 2-Methoxyestradiol 
                 inhibits growth of human breast and neuroblastoma cell lines 
                 in mice.


CORPORATE STRATEGY

         The Company's strategy is to discover and develop novel antiangiogenic
therapeutics as well as other promising technologies, such as cell permeation,
which the Company perceives to have clinical and commercial potential. The
principal elements of the Company's strategy are (i) to focus its resources on
current core technologies, (ii) to broaden its product and technology portfolio
through sponsored research collaborations with academic institutions,
government organizations and private enterprises, (iii) to augment product
development with its in-house research and development capabilities and (iv) to
leverage its resources through corporate partnerships in order to minimize the
cost to the Company of late-stage clinical trials and to accelerate product
commercialization. The Company's product candidates are in the developmental
stage and require further research, evaluation, and regulatory approval.  No
assurance can be given that any product candidate will result in a product
capable of commercial use.

ANGIOGENESIS

         Overview

         Within the human body, a network of arteries, capillaries and veins,
known as the vasculature, functions to transport blood throughout the tissues.
The basic network of the vasculature is developed through angiogenesis, a
fundamental process by which new blood vessels are formed. The primary
angiogenic period in humans takes place during the first three months of
embryonic development. During this period, cytokines and growth factors, which
are normally suppressed, are activated to stimulate the growth of new blood
vessels. Once the general network of the blood vessels is complete, these
angiogenic stimulators are inhibited and blood vessels grow longer and larger
in diameter until adulthood through a different process termed vasculogenesis.

         Angiogenesis and Cancer

         The term cancer includes many different types of uncontrolled cellular
growth. Clusters of cancer cells, referred to as tumors, may destroy
surrounding organs, impair physiological function and often lead to death. In
order to survive, cancer cells require oxygen and nutrients which they receive
from the body's blood supply. In order to access this blood supply, cancer
cells initiate a biochemical mechanism that stimulates angiogenesis to provide
the blood supply





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that nourishes the tumor. As cancer cells grow and metastasize (spread from
primary sites to other parts of the body) they require continuous angiogenesis.
Antiangiogenic drug candidates are intended to inhibit the growth of
tumor-feeding blood vessels and may prove to be effective in treating certain
cancers, with fewer adverse side effects than current therapies. Cancer is the
second leading cause of death in the United States and it is estimated that
approximately one million two hundred thousand new cases of cancer are expected
to be diagnosed in 1998.

         Existing cancer treatments include surgery, radiation therapy and
chemotherapy. Surgery is an invasive method of removing tumors. However, some
tumors are currently deemed inoperable due to their location, extent of organ
infiltration or size. Radiation therapy produces ionized molecules within the
body that attack cancer cells, and may also damage surrounding healthy cells.
Chemotherapy involves the administration of toxic substances (cytotoxins)
designed to kill cancer cells and usually produces severe side effects. In
addition, resistance to chemotherapy occurs over time. The Company believes
that its antiangiogenic therapeutics may prove to have significant advantages
over traditional cancer therapies, including reduced toxicity, and lack of drug
resistance, and may be administered in conjunction with other antiangiogenic
and traditional therapies.

         Angiogenesis and Blindness

         Angiogenesis within the eye, a condition often associated with
diabetes and macular degeneration, is a major cause of blindness.  Macular 
degeneration, which is often age-related, and diabetic retinopathy, a
secondary effect of diabetes, both involve the formation of new blood vessels
behind, or in front of the retina, respectively. The blood vessels that grow in
front of the retina block vision and the blood vessels that grow behind the
retina often hemorrhage or cause retinal detachment each resulting in a
decrease or loss of vision. It is estimated that approximately eight million
people in the U.S. have diabetic retinopathy, and that twenty-five thousand
cases result in blindness each year. It is estimated that approximately
thirteen million Americans suffer from macular degeneration. Nearly two million
of these people will develop vision impairment, of which one hundred thousand
will develop blindness each year. (Source: Prevent Blindness America). Current
treatments for diabetic retinopathy and to a more limited extent, macular
degeneration involve laser-based photocoagulation therapy, which often causes
additional damage to the retina and surrounding cells.

         Angiogenesis and Other Disease Indications

         A variety of other disease indications are related to angiogenesis,
including rheumatoid arthritis, atherosclerosis, psoriasis and Crohn's disease.
The Company believes that its antiangiogenic technologies may be applicable to
such diseases. To date, the Company has not researched antiangiogenic therapy
in diseases outside of cancer or macular degeneration. There can be no
assurance that the Company will pursue research outside these indications, that
product candidates will result from any research undertaken, or that any
products for these diseases will ever be commercialized.





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ENTREMED'S ANTIANGIOGENESIS PROGRAM

         The Company believes that certain small molecules or proteins that
exhibit antiangiogenic effects may be useful as therapeutics for diseases
involving angiogenesis. The Company currently focuses on angiogenesis
inhibition as a treatment for oncologic and ophthalmologic indications. Product
candidates under development include: (i) thalidomide and several of its
chemical analogs which inhibit angiogenesis, (ii) Angiostatin(TM) protein and
Endostatin(TM) protein, each a newly discovered angiogenesis inhibitor
naturally produced by the body and, (iii) 2-Methoxyestradiol, an oral
angiogenesis inhibitor, and its chemical analogs.  The Company's evaluation of
thalidomide and its chemical analogs as an antiangiogenic therapeutic may also
enable the Company to generate clinical and marketing data on the general 
utility of angiogenesis inhibitors. The Company believes that this data
might be useful in the development of Angiostatin(TM) protein, Endostatin(TM)
protein, and 2-Methoxyestradiol which, although in an earlier stage of
development than thalidomide, may have greater specificity as antiangiogenic
therapeutics. The Company believes that, if successfully developed, these
products could be used alone or in combination with each other to treat certain
angiogenic-related diseases.

         Product Candidates

         Thalidomide and Thalidomide Analogs.  The Company is evaluating the
antiangiogenic properties of the drug thalidomide and its chemical analogs.
Thalidomide, which was widely prescribed as a sedative in Europe in the late
1950s and early 1960s, caused severe birth defects when taken by pregnant
women. The Company believes that thalidomide may have affected fetal
development and caused birth defects by blocking new blood vessel growth, a
characteristic that may make thalidomide useful in the prevention and treatment
of angiogenic disorders. Thalidomide has been shown to block angiogenesis in
preclinical animal studies conducted at Children's Hospital. Due to the
negative history of thalidomide, as well as patent and competitive issues, the
Company has commenced research on chemical analogs of thalidomide which have 
similar mechanisms of action and focus on the antiangiogenic therapeutic
potential of this drug. The Company proposes to develop thalidomide, or a
thalidomide analog, as an oral therapeutic to inhibit the progression of
certain angiogenic diseases, including cancer and certain causes of blindness.

         The Company and the National Cancer Institute initiated Phase II
clinical trials in 1996 to evaluate the antiangiogenic effects of thalidomide
in inhibiting the progression of breast cancer, prostate cancer and Kaposi's
sarcoma. The Company also initiated and expanded a Phase II clinical trial for
brain cancer in 1996.  In May 1997, the Company announced successful interim
results in brain cancer and Kaposi's sarcoma patients treated with thalidomide.
In June 1997, the Company and the National Cancer Institute announced an
increase in the number of prostate cancer patients in NCI-sponsored Phase II
clinical trials of thalidomide.  In August 1997, the Company reacquired the
commercial rights to thalidomide in exchange for renewing Bristol-Myers
Squibb's warrant to purchase an additional $10,000,000 of the Company's common
stock. Bristol-Myers Squibb continues to hold the rights to thalidomide
analogs.  See "-- Collaborations and License Agreements.", "---Competition",
and "Patents and Proprietary Rights".  Thalidomide           





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was additionally shown to inhibit the abnormal formation of blood vessels in
the eye in animal studies performed at Children's Hospital. The Company is
currently conducting Phase II clinical trials at the Scheie Eye Institute at
the University of Pennsylvania School of Medicine and with the Retina
Associates of Cleveland to evaluate the antiangiogenic effects of thalidomide
in blindness due to age-related macular degeneration.

         Although not yet approved for sale in the United States, thalidomide
has been used as an investigational agent to treat a limited number of patients
for leprosy and other diseases and is being developed by other companies for
various disease indications, but not including the diseases in which
angiogenesis is a factor.  Celgene Corporation has received an approvable
letter from the U.S. Food and Drug Administration ("FDA") for the use of
thalidomide in erythema nodosum leprosum, an inflammatory skin condition of some
leprosy patients.  The approvable letter from the FDA indicates that Celgene
will be required to resolve issues of labeling, packaging, and distribution
prior to final market approval.

         Angiostatin(TM) Protein and Endostatin(TM) Protein.  The Company is
currently developing two endogenous proteins, Angiostatin(TM) protein and
Endostatin(TM) protein, as potential long term cancer therapeutics to prevent
metastatic disease and as therapies for primary tumors. These two proteins are
different in structure and origin but have similar biological activity.

         Metastatic tumor growth is attributed to the implantation and growth
of tumor cells at secondary sites. These tumor cells are released by a primary
tumor, or are released into circulation during surgical removal of the primary
tumor. Although surgeons generally remove significant amounts of healthy tissue
surrounding the tumor, in many cases "seed cells" have already escaped the
primary tumor, circulated through the body, and become embedded elsewhere. It
has been observed that in certain cases, these seed cells, or metastases, do
not vascularize and grow while the primary tumor is in place. However, after
the primary tumor is removed, metastatic tumors often grow rapidly.

         In Company-sponsored research at Children's Hospital, a substance
associated with primary tumors was identified which appears to prevent
vascularization and growth of metastatic tumors. Based upon such research, the
Company believes that primary tumors secrete an enzyme that cleaves
plasminogen, a known protein associated with blood clotting, into a smaller,
previously undiscovered protein. The Children's Hospital team isolated and
identified the protein in 1995, which the Company named Angiostatin(TM)
protein.  The Company has cloned and expressed the gene that codes for
Angiostatin(TM) protein. In 1996, the Children's Hospital team also isolated
and identified a second endogenous protein, named Endostatin(TM) protein.  The
gene for Endostatin(TM) protein has been cloned and expressed by the Company.
Preclinical studies, including the murine Lewis Lung Carcinoma ("LLC")
metastatic model, demonstrated that both Angiostatin(TM) and Endostatin(TM)
proteins inhibited the growth of metastatic tumors. In addition, the
Angiostatin(TM) protein was shown to reduce the size of primary murine
carcinomas and sarcomas as well as human prostate, breast and colon cancers
grown in immunodeficient mice. The Company is addressing additional required
preclinical studies for Angiostatin(TM) protein.  The Company is currently
producing Angiostatin(TM) and Endostatin(TM) protein in quantities sufficient
for preclinical studies.





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         The Company is collaborating with the NCI to pursue the early
preclinical development of Endostatin(TM) protein and 2-Methoxyestradiol
("2-ME") and its analogs, including exploration of methods for commercial
production of the molecules and possible clinical trails.

         The Company currently anticipates that either the Angiostatin(TM)
protein or Endostatin(TM) protein, as endogenous angiogenesis inhibitors, could
be administered as an adjunct therapy after cancer diagnosis and sustained
thereafter. The Company believes that there may be utility in using these
proteins in combination and that these proteins may also be effective in
inhibiting other angiogenic diseases such as diabetic retinopathy and macular
degeneration, although the Company has not conducted any research to date in
these areas. The Company has obtained exclusive licenses from Children's
Hospital for patent applications filed on the Angiostatin(TM) and
Endostatin(TM) proteins and related technology.  BMS has sublicensed commercial
rights to Angiostatin(TM) protein from the Company.


         Other Antiangiogenesis Research

         The Company maintains an internal discovery and development program
and also continues to sponsor and support research at Children's Hospital on
angiogenesis technologies with the aim of discovering additional antiangiogenic
products.  The Company's research in these areas is currently early stage,
although the Company and Children's Hospital have identified other proteins and
compounds with angiogenic or antiangiogenic properties that may be candidates
for further development. To the extent that additional antiangiogenic
therapeutics are developed at Children's Hospital and licensed by the Company,
Bristol-Myers Squibb has a five-year right of first refusal to negotiate for a
sublicense to such technologies from the Company.

ENTREMED'S CELL PERMEATION TECHNOLOGY

         Overview

         The Company is applying its expertise in the role of blood function to
the development of a cell permeation technology that may facilitate the
delivery into blood cells of drugs, genes or other therapeutic agents that
otherwise would not readily permeate through the cell membrane. To date, the
Company has focused its cell permeation research on a method of enhancing the
oxygen delivery capabilities of blood.

         Human blood is comprised of four components: red blood cells, white
blood cells, plasma and platelets. The principal functions of human blood are
to transport oxygen and nutrients to tissues, carry waste products away from
tissues and defend the body against infection. Hemoglobin, a protein-iron
molecule contained within red blood cells, is responsible for carrying oxygen
from the lungs to tissues throughout the body. Tissues and organs in the body
require oxygen to function properly, and oxygen deficiency may lead to tissue
damage or death. In human blood, each hemoglobin molecule carries four
molecules of oxygen, but releases only one. It has been proposed that inositol
hexaphosphate ("IHP"), a naturally occurring plant





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chemical, may enhance the oxygen releasing capabilities of hemoglobin by
allowing the release of three oxygen molecules. The theory that IHP could
enhance the oxygen releasing capacity of hemoglobin has been proposed for
several years. Scientists have observed that a molecule similar to IHP found in
the hemoglobin of birds is more efficient at releasing oxygen than a
corresponding molecule (2,3 diphosphoglycerate, or 2,3 DPG) found in human
hemoglobin. However, IHP does not readily diffuse through the cell membrane of
human red blood cells and previous techniques used to introduce IHP into red
blood cells showed significant problems and resulted in substantial cell
damage.  The Company's research is focused on overcoming these problems.

         The Company's research has led to the development of a prototype
device designed to introduce IHP into red blood cells without significant cell
damage. The Company intends to develop this application as a therapeutic in
such chronic and acute diseases as angina, congestive heart failure, heart
attacks, and other diseases involving inadequate circulation or respiratory
functions.  Existing methods of treatment for these diseases, including
surgical remedies, drug therapies and non-surgical devices, treat such diseases
by seeking to increase blood flow, rather than increasing the blood's oxygen
releasing capacity. In addition, unlike blood that is stored in blood banks,
which loses its capacity to deliver oxygen for approximately 12 to 24 hours
following a transfusion, blood treated with IHP may be able to release oxygen
to tissues more rapidly following transfusion. As IHP-treated blood may release
more oxygen to tissues than untreated human blood, it may also be possible that
a smaller amount of IHP-treated blood can be transfused to obtain equivalent
tissue oxygenation.

         With the exception of IHP-treated red blood cells, the Company has not
yet explored any other applications of its cell permeation technology.
Potential therapeutic candidates will be selected based on an analysis of
various disease indications and related market potential, the likely time and
expense required for development and adaptation of the core technology for the
specific application and the interest of potential strategic partners.
Potential product candidates may be reformulations of existing compounds
approved by the FDA where enhancement of delivery through blood cell membranes
is believed to have increased clinical value compared to existing methods.

         Device for Oxygen Enhanced Blood Delivery

         The Company has constructed a prototype device designed to introduce
IHP molecules into red blood cells, which may enhance the delivery of oxygen to
tissues and organs, and is sponsoring contract research and development on
IHP-treated blood. An initial prototype flow electroporation device has been
constructed and the accompanying reagents have been developed, although design
activities are ongoing and there can be no assurance that a clinically
acceptable device will be completed.  The Company intends to conduct 
preclinical toxicology studies required to demonstrate the safety and efficacy
of IHP-treated red blood cells in enhancing the delivery of oxygen to tissues
in relevant disease states.





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         The Company's flow electroporation technology is based on Company
sponsored research previously conducted at the Center for Blood Research
Laboratories at Harvard Medical School ("CBRL"). In November 1992, the Company
obtained an exclusive worldwide license to this technology from the CBRL in
exchange for cash payments and royalties based on sales, and a United States
patent was received from the U.S. Patent and Trademark office in March 1998
covering the electroporation chamber, a core component of the Company's cell
permeation technology. Device and disposable component engineering and
development has been and continues to be conducted by a contract manufacturer.

         The Company is in discussions with several major medical device
companies and is seeking to enter into collaborative arrangements with such
companies to develop and commercialize the Company's cell permeation
technology.  However, there can be no assurance that any such agreements will
be entered into with any of these companies or any potential partner or that
the terms of any agreement will be favorable to the Company.

         COLLABORATIONS AND LICENSE AGREEMENTS

         General.  The Company intends to continue to develop in-licensed
products and sponsored research programs and to enter into collaborations and
licensing agreements with corporate partners for product development,
manufacturing and marketing. The Company believes that it will be necessary to
enter into collaborative arrangements with other companies in the future to
develop, commercialize, manufacture and market its cell permeation technology,
as well as other products or technologies it may acquire or develop.

         Bristol-Myers Squibb Company Collaboration.  In December 1995, the
Company entered into the BMS Collaboration for the development of certain
antiangiogenic products. The BMS Collaboration provided for a five year
research program, the grant to Bristol-Myers Squibb of an exclusive license to
the Company's thalidomide, thalidomide analogs and Angiostatin(TM) protein
technologies and an equity investment in the Company by Bristol-Myers Squibb.

         During the five year research term, the Company has agreed to conduct
research and Bristol-Myers Squibb has agreed to support and fund such research.
Bristol-Myers Squibb has agreed to provide funding of $18,350,000, payable in
ten semi-annual payments of $1,835,000, of which $9,175,000 has been paid to
date. In addition, Bristol-Myers Squibb has paid $730,000 to reimburse the
Company for thalidomide clinical studies. Bristol-Myers Squibb also paid to the
Company $1,000,000 in license fees, a portion of which was paid to Children's
Hospital, and $2,500,000 in consideration of know-how and research and
development previously performed by the Company.

         The Company granted Bristol-Myers Squibb an exclusive worldwide
royalty-bearing license to make, use and sell products that are based upon the
Company's Angiostatin(TM) protein, thalidomide and thalidomide analog
technologies.  Bristol-Myers Squibb also received a five year right of first
refusal to negotiate for commercial rights with respect to the development of 
any technology licensed or to be licensed by the Company from Children's
Hospital in the field of antiangiogenic therapeutics.  Such right of first
refusal applies to the Company's Endostatin(TM) protein technology and 2-





                                       11
<PAGE>   12
Methoxyestradiol technologies.  Pursuant to such rights of first refusal BMS
proposed terms for the sublicense of such technologies.  The parties were
unable to reach agreement on terms.  Therefore, the Company has the ability to
offer sublicensing rights to Endostatin(TM) protein and 2-ME technologies to
other pharmaceutical companies if it so desires.

          In August 1997, the Company reacquired the commercial rights to
thalidomide in exchange for an extension of the period during which
Bristol-Myers Squibb could evaluate Endostatin(TM) and 2-ME pursuant to BMS's
right of first refusal and renewing BMS's warrants to purchase an additional
$10,000,000 of the Company's common stock at $22.50 per share, or 444,444
shares from the Company.  This warrant was renewed and expired in November
1997.  Bristol-Myers Squibb continues to hold the rights to thalidomide
analogs.  Bristol-Myers Squibb advised the Company that its determination not
to pursue commercialization of thalidomide was based upon patent and certain
competitive and market issues, including the development of thalidomide
products by other companies.  See "--Competition" and "--Patents and
Proprietary Rights".  However, based upon discussions with Bristol-Myers
Squibb, the decision regarding thalidomide is not expected to affect
Bristol-Myers Squibb's internal efforts with respect to thalidomide analogs nor
Angiostatin(TM) protein research and development as contemplated in the BMS
Collaboration. Therefore, the Company does not believe that Bristol-Myers
Squibb's decision will have a material adverse effect on the Company's
development of an oral antiangiogenic therapeutic.

         The BMS Collaboration also provides for royalties to the Company based
on the net sales price of products sold by Bristol-Myers Squibb. With respect
to any product that is derived from Angiostatin(TM) protein, the royalty shall
be 15% of net sales, subject to a reduction to no less than 10% based on
manufacturing costs and third party royalties. With respect to any product
derived from thalidomide analogs, the royalty shall range from 8% to 12.5%
based on sales volume.

         In addition, the Company may be entitled to receive additional
payments for each product category based upon the achievement of defined and
primarily late-stage clinical development and regulatory filing milestones. In
the event all of these milestones are achieved, as to which there can be no
assurance, these additional payments could total $26,000,000. Up to $6,000,000
of the milestone payments for products related to thalidomide analogs and up to
$4,000,000 of the milestones for products related to Angiostatin(TM) protein
will be creditable against any royalties that may become payable by
Bristol-Myers Squibb to the Company, although the cumulative amount of credits
in any year may not exceed 50% of the aggregate royalties otherwise payable.
The Company retained certain co-promotion rights if Bristol-Myers Squibb elects
to seek a co-promotion partner with respect to any products covered by the
collaboration. The BMS Collaboration may be terminated by Bristol-Myers Squibb
for any reason upon six months notice without any further liability for future
payments.

         Pursuant to the BMS Collaboration, Bristol-Myers Squibb purchased
541,666 shares of the Company's Common Stock for $12.00 per share in December
1995 and purchased an additional $5,000,000 of Common Stock concurrent with the
Company's June 1996 IPO in a private placement at the initial public offering
price per share of $15.00 per share. The Company also issued to Bristol-Myers
Squibb a warrant, exercisable for one-year from June 19, 1996, to





                                       12
<PAGE>   13
purchase up to $10,000,000 of Common Stock at an exercise price per share equal
to $22.50 per share, or 444,444 shares from the Company.  This warrant was
renewed and expired in November 1997.  The Company has granted to Bristol-Myers
Squibb certain registration rights with respect to all of these shares.

         Academic Collaborations.  In addition to its in-house research
program, the Company collaborates with several academic institutions to support
research in areas of the Company's product development interests. Usually,
research supported at outside academic institutions is performed in conjunction
with additional in-house research. Often, the faculty members responsible for
supervision of the research performed at the academic institution will
participate further as consultants to the Company's in-house effort.

         Typically under these arrangements, the Company agrees to fund the
research it has chosen to support with a specified budget over a specified time
period, usually one to three years. In return, the Company usually obtains an
exclusive license, with the right to grant sublicenses, and the right to
further develop and market products that arise out of the technology being
supported. Under several of these licenses, the Company is required to meet
specified milestones or diligence requirements in order to retain its license
of such technologies. There can be no assurance that the Company will satisfy
these milestones and diligence requirements and be able to retain such
licenses. In addition to providing research support, the Company usually is
required to pay royalties to the academic institution on sales, if any, of any
licensed products resulting from such research. The Company in most instances
files and prosecutes patent applications on behalf of the institutions.

         The Company's primary academic collaboration is with Children's
Hospital. In September 1993, the Company entered into a sponsored research
agreement with Children's Hospital to support research conducted under the
direction of Dr. M. Judah Folkman on the role of angiogenesis in pathological
conditions. Under the agreement, as amended in August 1995, the Company agreed
to pay to Children's Hospital $11,000,000, of which $8,000,000 was paid through
February 1998, $1,000,000 is due on April 1, 1998 and the remainder is due in
equal semi-annual payments of $1,000,000 until April 1, 1999. The Company also
granted to Children's Hospital options to acquire 83,334 shares of Common Stock
at an exercise price of $6.00 per share and additional options to acquire
50,000 shares at an exercise price of $6.375 per share. The Company obtained an
exclusive option to negotiate an exclusive, worldwide, royalty-bearing license
to any technology resulting from the research at Children's Hospital in areas
covered by the agreement. The Company received a right to sublicense the
licensed technologies, although the Company agreed to pay to Children's
Hospital a portion of all sublicensing payments, which do not include payments
to support research and development by the Company or equity investments in the
Company. The Company has also received certain rights of first refusal to
certain additional research projects and any new project opportunities arising
from Dr. Folkman's core laboratory activities.

         The Company exercised its option in May 1994 to obtain exclusive
worldwide licenses to certain oral antiangiogenic technology (thalidomide and
its analogs), cancer diagnostic and prognostic technology, and endogenous
antiangiogenic technology, Angiostatin(TM) protein. In





                                       13
<PAGE>   14
December 1996, the Company exercised its option to obtain the exclusive
worldwide licenses to Endostatin(TM) protein and 2-Methoxyestradiol, an orally
available angiogenesis inhibitor. These license agreements provide for certain
milestone payments by the Company to Children's Hospital as well as royalties
based on sales, if any, of any products developed from the licensed
technologies. The milestone payments aggregate $4,650,000, of which $290,000
has been paid through December 31, 1997, and are based upon license fees and
the achievement of regulatory approvals.

         Other Collaborative and Strategic Relationship Arrangements.  In July
1996, the Company acquired, through its subsidiary Cytokine Sciences, Inc.
("Cytokine"), substantially all of the assets of Innovative Therapeutics, Inc.
("ITI") in exchange for 15% of the common stock of Cytokine valued at
approximately $44,000.  Prior to the acquisition, the Company sponsored
research at  ITI on methods to treat disease by stimulating cellular immunity.
The methods currently under development are designed to target specific
diseases by the administration of synthetic peptides or recombinant proteins
that mimic proteins which occur naturally during that particular disease. These
therapeutic agents are designed to initiate cellular immune responses
exclusively, without affecting humoral immunity. Prior to the acquisition, the
Company had paid ITI approximately $832,500 pursuant to its research
collaboration.

         Under the terms of the transaction with ITI, the Company agreed to
provide funding to Cytokine in an aggregate amount of $1,600,000 during the
first two years commencing July 2, 1996, with an additional $1,500,000 to be
provided at the sole option of the Company during the third year.  All
intercompany balances and transactions have been eliminated in the consolidated
financial statements.

         The Company intends to continue to support and fund research at other
companies or academic or other institutions in selected areas in exchange for
rights to technologies and products derived from such sponsored research or
equity positions in such companies. The Company expects to focus on sponsored
research in areas in which it has existing expertise or where a strong market
opportunity is perceived. The Company may establish subsidiaries to develop and
commercialize promising technologies or products generated from this research,
which may create opportunities for separately financing and managing new
development programs.

COMPETITION

         Competition in the pharmaceutical, biotechnology and biopharmaceutical
industries is intense and based significantly on scientific and technological
factors, the availability of patent and other protection for technology and
products, the ability and length of time required to obtain governmental
approval for testing, manufacturing and marketing and the ability to
commercialize products in a timely fashion. Moreover, the biopharmaceutical
industry is characterized by rapidly evolving technology that could result in
the technological obsolescence of any products developed by the Company. The
Company competes with many specialized biopharmaceutical firms, as well as a
growing number of large pharmaceutical companies that are applying
biotechnology to their operations. Many biopharmaceutical companies have
focused their





                                       14
<PAGE>   15
development efforts in the human therapeutics area, and many major
pharmaceutical companies have developed or acquired internal biotechnology
capabilities or made commercial arrangements with other biopharmaceutical
companies. These companies, as well as academic institutions, governmental
agencies and private research organizations, also compete with the Company in
recruiting and retaining highly qualified scientific personnel and consultants.

         The Company's competition will be determined in part by the potential
indications for which the Company's compounds may be developed and ultimately
approved by regulatory authorities. The Company is relying on Bristol-Myers
Squibb to commercialize the licensed antiangiogenic products, Angiostatin(TM)
protein and thalidomide analogs, and accordingly, the success of these products
will depend in significant part on Bristol-Myers Squibb's efforts and ability
to compete in these markets. The success of the BMS Collaboration will depend
in part upon Bristol-Myers Squibb's own competitive, marketing and strategic
considerations, including the relative advantages of alternative products being
developed and marketed by Bristol-Myers Squibb and its competitors. For
example, Bristol-Myers Squibb currently markets cancer therapeutics, which
would be competitive with any antiangiogenic products developed under the BMS
Collaboration to treat cancer.

         The Company is aware of companies and research institutions
investigating the role of angiogenesis generally and specifically as it may be
useful in developing therapeutics to treat various diseases associated with
abnormal blood vessel growth.  In studies available to date, these angiogenic
inhibitors have shown varying effectiveness in inhibiting angiogenesis and
differing degrees of bioavailability and toxicity. Significant further
preclinical and clinical development of these products is needed prior to an
assessment of the more significant competitive product candidates in the
antiangiogenic disease indications targeted by the Company.

         The Company is aware of other companies developing thalidomide and
certain of its chemical analogs for various disease indications, including
Celgene Corporation, for the treatment of erythema nodosum leprosum ("ENL"),
AIDS-related cachexia (or wasting) and mouth ulcers, and Andrulis
Pharmaceuticals, for diabetes. Celgene has received an approvable letter from
the FDA for the use of thalidomide in ENL. In 1997, two patents licensed to the
Company were issued to Children's Hospital by the U.S. Patent and Trademark
Office covering the use of thalidomide to treat angiogenic-mediated diseases
including cancer, macular degeneration and rheumatoid arthritis.  Although the
Company believes that its patent rights would preclude another company from
marketing thalidomide for antiangiogenic indications, there can be no assurance
that any patent will issue or afford meaningful protection.  In August 1997,
the Company reacquired the commercial rights to thalidomide from Bristol-Myers
Squibb who continue to hold the rights to thalidomide analogs. Bristol-Myers
Squibb has advised the Company that its determination not to pursue the
commercialization of thalidomide was based upon patent and certain competitive
and market issues, including the development of thalidomide products by other
companies.  See "-- Collaboration and License Agreement."

         A number of companies utilize or are developing cell permeation or
drug delivery technologies and competition for the development of drug delivery
products is intense, although the Company's focus is on blood cell permeation.
The Company is aware of at least one other





                                       15
<PAGE>   16
company, Allos Therapeutics, Inc., that is engaged in early-stage research
regarding a method to acutely increase the oxygen-releasing capacity of
hemoglobin for treating cancer. The Company also anticipates that IHP-treated
blood (which is not technically a blood replacement), will compete for use in
blood transfusions with readily available products, including whole human blood
or packed red blood cells, and products under development, such as blood
substitutes.

         Many of the Company's existing or potential competitors have
substantially greater financial, technical and human resources than the Company
and may be better equipped to develop, manufacture and market products. In
addition, many of these competitors have extensive experience in preclinical
testing and human clinical trials and in obtaining regulatory approvals. The
existence of competitive products, including products or treatments of which
the Company is not aware, or products or treatments that may be developed in
the future, may adversely affect the marketability of products which may be
developed by the Company.

MANUFACTURING AND MARKETING

         The Company's strategy is to enter into collaborative arrangements
with pharmaceutical and other companies for the development, manufacturing and
marketing of products requiring broad marketing capabilities and for overseas
marketing. These collaborators are generally expected to be responsible for
funding or reimbursing all or a portion of the development costs, including the
costs of clinical testing necessary to obtain regulatory clearances and for
commercial scale manufacturing, in exchange for exclusive or semi-exclusive
rights to market specific products in particular geographic territories. To
date, the Company has entered into one collaboration agreement, with
Bristol-Myers Squibb, relating to Angiostatin(TM) and thalidomide analogs.
However, the Company may, in the future, consider manufacturing or marketing
certain products directly and to co-promote certain products if it believes it
is appropriate under the circumstances. The Company has no experience in
manufacturing or marketing products on a commercial scale and does not have the
resources to manufacture or market by itself on a commercial scale any of its
product candidates. In the event the Company decides to establish a
manufacturing facility, the Company will require substantial additional funds,
and will be required to hire and train significant additional personnel and
comply with the extensive "good manufacturing practice" regulations applicable
to such a facility.

PATENTS AND PROPRIETARY RIGHTS

     The Company's success will depend in part on its ability to obtain patent
protection for its products, both in the United States and abroad. The patent
position of biotechnology and pharmaceutical companies, in general, is highly
uncertain and involves complex legal and factual questions.

     The intellectual property that the Company has licensed exclusively from
Children's Hospital of the Harvard Medical School includes eight pending U.S.
patent applications and one issued patent covering Angiostatin(TM) protein, DNA
coding for the Angiostatin(TM) protein, the use of Angiostatin(TM) protein as a
therapeutic agent and the use of Angiostatin(TM) protein as a diagnostic agent.
Four of these patent applications have been allowed by the U.S. Patent and





                                       16
<PAGE>   17
Trademark Office. Included in the Children's Hospital license are five pending
U.S patent applications and three issued patents covering the use of the
thalidomide molecule and thalidomide analogs as an anti-angiogenic agent for
the treatment of a wide variety of diseases that are caused by uncontrolled
angiogenesis. These patent applications also include composition of matter
coverage for certain thalidomide analogs. In addition, the Company has licensed
two pending patent applications and two issued patents covering estrogenic
compounds as anti-mitotic agents and anti-angiogenic compounds. The Company has
also licensed two pending U.S. patent applications covering the Endostatin(TM)
protein, DNA coding for the Endostatin(TM) protein, the use of Endostatin(TM)
protein as a therapeutic agent and the use of Endostatin(TM) protein as a
diagnostic agent.  The patent applications also cover the combination of
Endostatin(TM) protein and Angiostatin(TM) protein as a therapeutic
composition.        

         The Company has two U.S. patent applications pending and two issued
patents covering the device and method for introducing substances into cells by
flow electroporation. These patent applications and patents cover the
electroporation chamber in the device, the overall electroporation device and
the treatment of a wide variety of diseases using cells that have been treated
in the electroporation device. One of the issued patents has been licensed from
the Centers for Blood Research at Harvard University.

     Patent applications corresponding to the above described U.S. patent
applications have been filed in Europe, Japan, Canada and other selected
countries.

     The Company has registered the mark ENTREMED in the U.S. Patent and
Trademark Office and has filed intent-to-use trademark applications in the U.S.
Patent and Trademark Office for the marks "ANGIOSTATIN", "ENDOSTATIN"
"VASCULOSTATIN", "WE'RE NOT MAKING BETTER BLOOD, WE'RE MAKING BLOOD BETTER",
and "DOING WELL BY DOING GOOD".


     There can be no assurance that any future patents will be granted or that
patents issued to the Company will not be challenged, invalidated or
circumvented, or that the rights granted thereunder will provide proprietary
protection to the Company. Furthermore, there can be no assurance that others
will not independently develop similar products or, if patents are issued to
the Company or its collaborators, will not design around such patents

     Furthermore, the enactment of the legislation implementing the General
Agreement on Trade and Tariff ("GATT") has resulted in certain changes to
United States patent laws that became effective on June 8, 1995. Most notably,
the term of patent protection for patent applications filed on or after June 8,
1995 is no longer a period of seventeen years from the date of grant. The new
term of a United States patent will commence on the date of issuance and
terminate twenty years from the earliest effective filing date of the
application. Because the time from filing to issuance of biotechnology patent
application is often more than three years; a twenty-year term from the
effective date of filing may result in a substantially shortened term of patent
protection, which may adversely impact the Company's patent position if this
change results in a shorter period of patent coverage.  The Company's business
could be adversely affected to the extent that the duration and level of the
royalties it is entitled to receive from a collaborative partner is based on
the existence of a valid patent.





                                       17
<PAGE>   18
     The Company's potential products may conflict with patents which have been
or may be granted to competitors, universities or others. As the biotechnology
industry expands and more and more patents are issued, the risk increases that
the Company's potential products may give rise to claims that they infringe the
patents of others. Such other persons could bring legal actions against the
Company claiming damages and seeking to enjoin clinical testing, manufacturing
and marketing of the affected products. If any such actions are successful, in
addition to any potential liability for damages, the Company could be required
to obtain a license to continue to manufacture or market the affected products.
There can be no assurance that the Company would prevail in any such action or
that any license required under any such patent would be made available on
acceptable terms, if at all.  If the Company becomes involved in litigation, it
could consume a substantial portion of the Company's time and resources.

     Composition of matter patent protection is not available for thalidomide.
The Company is aware of at least two other issued patents covering certain
non-antiangiogenic uses of thalidomide. Although the Company believes that the
claims in such patents will not interfere with the Company's proposed use of
thalidomide, there can be no assurance that the holders of such patents will
not be able to exclude the Company from using thalidomide for other
non-antiangiogenic uses of thalidomide.

     The Company also relies on trade secret protection for its confidential
and proprietary information. However, trade secrets are difficult to protect
and there can be no assurance 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 unpatented trade secrets.

     The Company requires its employees, consultants and advisors to execute a
confidentiality agreement upon the commencement of an employment or consulting
relationship with the Company. The agreements generally provide that trade
secrets and all inventions conceived by the individual and all confidential
information developed or made known to the individual during the term of the
relationship shall be the exclusive property of the Company and shall be kept
confidential and not disclosed to third parties except in specified
circumstances. There can be no assurance, however, that these agreements will
provide meaningful protection for the Company's proprietary information in the
event of unauthorized use or disclosure of such information.

GOVERNMENT REGULATION

         The Company's development, manufacture and potential sale of
therapeutics is subject to extensive regulation by United States and foreign
governmental authorities.

         Regulation of Pharmaceutical Products.  Products being developed by
the Company may be regulated by the FDA as drugs or biologics or, in some
cases, as medical devices. New drugs are subject to regulation under the
Federal Food, Drug, and Cosmetic Act, and biological products, in addition to
being subject to certain provisions of that Act, are regulated under the





                                       18
<PAGE>   19
Public Health Service Act. The Company believes that drug products developed by
it or its collaborators will be regulated either as biological products or as
new drugs. Both statutes and the regulations promulgated thereunder govern,
among other things, the testing, manufacturing, safety, efficacy, labeling,
storage, record keeping, advertising and other promotional practices involving
biologics or new drugs, as the case may be. FDA approval or other clearances
must be obtained before clinical testing, and before manufacturing and
marketing, of biologics and drugs.

         Obtaining FDA approval has historically been a costly and time
consuming process. Generally, in order to gain FDA premarket approval, a
developer first must conduct preclinical studies in the laboratory and in
animal model systems to gain preliminary information on an agent's efficacy and
to identify any safety problems. The results of these studies are submitted as
a part of an investigational new drug ("IND") application, which the FDA must
review before human clinical trials of an investigational drug can start. The
IND application includes a detailed description of the clinical investigations
to be undertaken.

         In order to commercialize any products, the Company or its
collaborator must sponsor and file an IND and be responsible for initiating and
overseeing the clinical studies to demonstrate the safety, efficacy and potency
that are necessary to obtain FDA approval of any such products. For Company or
collaborator-sponsored INDs, the Company or its collaborator will be required
to select qualified investigators (usually physicians within medical
institutions) to supervise the administration of the products, and ensure that
the investigations are conducted and monitored in accordance with FDA
regulations, including the general investigational plan and protocols contained
in the IND. Clinical trials are normally done in three phases, although the
phases may overlap. Phase I trials are concerned primarily with the safety and
preliminary effectiveness of the drug, involve fewer than 100 subjects, and may
take from six months to over one year. Phase II trials normally involve a few
hundred patients and are designed primarily to demonstrate effectiveness in
treating or diagnosing the disease or condition for which the drug is intended,
although short-term side effects and risks in people whose health is impaired
may also be examined. Phase III trials are expanded clinical trials with larger
numbers of patients which are intended to evaluate the overall benefit-risk
relationship of the drug and to gather additional information for proper dosage
and labeling of the drug. Clinical trials generally take two to five years to
complete, but may take longer. The FDA receives reports on the progress of each
phase of clinical testing, and it may require the modification, suspension, or
termination of clinical trials if it concludes that an unwarranted risk is
presented to patients.

         If clinical trials of a new product are completed successfully, the
sponsor of the product may seek FDA marketing approval.  If the product is
regulated as a biologic, the FDA will require the submission and approval of a
Biologics License Application ("BLA") before commercial marketing of the
biologic. If the product is classified as a new drug, the Company must file a
New Drug Application ("NDA") with the FDA and receive approval before
commercial marketing of the drug. The NDA or BLA must include detailed
information about the drug and its manufacture and the results of product
development, preclinical studies and clinical trials. The testing and approval
processes require substantial time and effort and there can be no assurance
that any approval will be granted on a timely basis, if at all. NDAs and BLAs
submitted to the FDA can take up to two to five years to receive approval. If
questions arise during the FDA





                                       19
<PAGE>   20
review process, approval can take more than five years. Notwithstanding the
submission of relevant data, the FDA may ultimately decide that the NDA or BLA
does not satisfy its regulatory criteria for approval and deny approval or
require additional clinical studies. In addition, the FDA may condition
marketing approval on the conduct of specific post-marketing studies to further
evaluate safety and effectiveness. Even if FDA regulatory clearances are
obtained, a marketed product is subject to continual review, and later
discovery of previously unknown problems or failure to comply with the
applicable regulatory requirements may result in restrictions on the marketing
of a product or withdrawal of the product from the market as well as possible
civil or criminal sanctions.

         Thalidomide is regulated by the FDA's Center for Drug Evaluation and
Research. Although not approved for sale in the U.S., thalidomide has been used
as an investigational agent to treat thousands of patients for leprosy and
other diseases. EntreMed has filed an IND application and started Phase II
trials in macular degeneration, a leading cause of blindness, and expects that
the analysis of these results, together with availability of necessary funding,
could determine whether Phase III trials may be attempted. The National Cancer
Institute in collaboration with EntreMed has begun Phase II trials in breast
cancer, prostate cancer, brain cancer and Kaposi's sarcoma.  It is expected
that future cancer trials may be dependent on the results of these studies.
Thalidomide must meet the standard regulatory requirements of any new drug, and
successful Phase III clinical trials will be necessary to form the basis of an
NDA.

         Analogs of thalidomide may be regulated as new chemical entities by
the FDA's Center for Drug Evaluation and Research.  Although these compounds
are in the discovery phase of research, it is expected that as new chemical
entities are discovered complete preclinical toxicology studies will be
required prior to studies in humans. The remainder of the developmental and
regulatory requirements will be similar to that of any new drug.

         Angiostatin(TM) and Endostatin(TM) proteins, each a naturally
occurring substance, are considered biologics and will be regulated by the
FDA's Center for Biologics Evaluation and Research. As genetically engineered
and endogenous proteins, Angiostatin(TM) protein and Endostatin(TM) protein
will face unique and specific regulation hurdles, such as those related to the
manufacture of the products and the behavior of the products in the body. The
regulatory requirements for recombinant proteins have been developed for other
endogenous molecules (e.g., Epogen(TM), Neupogen(TM) and interferons) and
Angiostatin(TM) protein and Endostatin(TM) protein are expected to follow these
established guidelines. Successful preclinical studies and Phase I, II and III
trials will be necessary to form the basis for a BLA.  Bristol-Myers Squibb is
responsible for conducting these clinical studies with Angiostatin(TM) protein.

         The cell permeation technology, and specifically IHP-treated red blood
cells, will be regulated by the FDA's Center for Biologics Evaluation and
Research.  In 1997, the FDA responded to a letter from EntreMed requesting a
product jurisdiction determination, designating the Center for Biologics
Evaluation and Research as the agency component with primary jurisdiction for
the premarket review and regulation of the product.  The product will be
reviewed as a medical device under the premarket application ("PMA") provisions
of the Federal Food, Drug and Cosmetic Act (described below).  Historically,
the FDA's Office of Blood





                                       20
<PAGE>   21
Research and Review has had the most expertise and experience in regulating
blood, apheresis equipment and disposables associated with the processing of
human blood. Further development for IHP-treated blood is expected to follow a
similar path to that of any therapeutic biologic, with successful completion of
Phase I, Phase II and Phase III trials required to precede the filing of a PMA.
As the cell permeation technology requires the use of red blood cells produced
from humans, the Company will be required to comply with, or to contract with
suppliers that comply with, stringent regulation of blood component collection.
That regulation is designed to protect both donors and recipients of blood
products and involves significant record-keeping and other burdens.

         Regulation of Devices.  Any device products which may be developed by
the Company are likely to be regulated by the FDA as medical devices rather
than drugs. In addition, as noted, the device used to insert IHP in blood cells
also may be regulated as a medical device. The nature of the FDA requirements
applicable to such products depends on their classification by the FDA. A
device developed by the Company would be automatically classified as a Class
III device, requiring pre-market approval, unless the device was substantially
equivalent to an existing device that has been classified in Class I or Class
II or to a pre-1976 device that has not yet been classified or the Company
could convince the FDA to reclassify the device as Class I or Class II.  If the
Company were unable to demonstrate such substantial equivalence and unable to
obtain reclassification, it would be required to undertake the costly and
time-consuming process, comparable to that for new drugs, of conducting
preclinical studies, obtaining an investigational device exemption to conduct
clinical tests, filing a premarket approval application, and obtaining FDA
approval.

         If the device were a Class I product, the "general controls" of the
Federal Food, Drug, and Cosmetic Act  chiefly adulteration, misbranding, and
good manufacturing practice requirements would nevertheless apply. If
substantial equivalence to a Class II device could be shown, the general
controls plus "special controls" such as performance standards, guidelines for
safety and effectiveness, and post-market surveillance would apply. While
demonstrating substantial equivalence to a Class I or Class II product is not
as costly or time-consuming as the pre-market approval process for Class III
devices, it can in some cases also involve conducting clinical tests to
demonstrate that any differences between the new device and devices already on
the market do not affect safety or effectiveness. If substantial equivalence to
a pre-1976 device that has not yet been classified has been shown, it is
possible that the FDA would subsequently classify the device as a Class III
device and call for the filing of premarket approval applications at that time.
If the FDA took that step, then filing an application acceptable to the FDA
would be a prerequisite to remaining on the market.

         It is likely that the review process will nevertheless occur in the
Center for Biologics Evaluation and Research. It is possible, however, that
such Center would consult with relevant officials in the FDA's Center for
Devices and Radiological Health.  Such a consultation might further delay
approval of the device and thus of this technology.

         Other.  In addition to the foregoing, the Company's business is and
will be subject to regulation under various state and federal environmental
laws, including the Occupational Safety





                                       21
<PAGE>   22
and Health Act, the Resource Conservation and Recovery Act and the Toxic
Substance Control Act. These and other laws govern the Company's use, handling
and disposal of various biological, chemical and radioactive substances used in
and wastes generated by its operations. The Company believes that it is in
material compliance with applicable environmental laws and that its continued
compliance therewith will not have a material adverse effect on its business.
The Company cannot predict, however, whether new regulatory restrictions on the
marketing of biotechnology products will be imposed by state or federal
regulators and agencies.

EMPLOYEES

         As of March 31, 1998, the Company had 50 full-time employees, of which
40 were in research and development and 10 were in management and
administration. The Company intends to hire additional personnel. The Company
also utilizes part-time or temporary consultants on an as-needed basis. None of
the Company's employees is represented by a labor union and the Company
believes its relations with its employees are satisfactory.

RISK FACTORS

         History of Losses; Accumulated Deficit and Anticipated Future Losses.
To date, the Company has been engaged primarily in research and development
activities and, with the exception of license fees and research and development
funding under the BMS Collaboration and research grants, has not derived any
revenues from operations. At December 31, 1997, the Company had an accumulated
deficit of approximately $31,794,000 and significant losses have continued and
are expected to continue for the foreseeable future. The Company will be
required to conduct substantial research and development and clinical testing
activities for all of its proposed products, which activities are expected to
result in operating losses for the foreseeable future, particularly due to the
extended time period before the Company expects to commercialize any products,
if ever. In addition, to the extent the Company relies upon others for
development and commercialization activities, the Company's ability to achieve
profitability will be dependent upon the success of such third parties. There
can be no assurance that the Company will be able to generate revenues from
operations or achieve profitability on a sustained basis, if at all.

         Early Stage and Uncertainty of Product Development.  The Company's
proposed products and research programs are in the early developmental stage
and require significant time-consuming and costly research and development,
testing and regulatory clearances.  Accordingly, the Company does not expect
any of its product candidates to be commercially available for several years,
if ever. The successful development of any product is subject to the risks of
failure inherent in the development of products or therapeutic procedures based
on innovative technologies. These risks include the possibilities that any or
all of these proposed products or procedures are found to be ineffective or
toxic, or otherwise fail to receive necessary regulatory clearances; that the
proposed products or procedures are uneconomical to manufacture or market or do
not achieve broad market acceptance; that third parties hold proprietary rights
that preclude the Company from marketing them; or that third parties market a
superior or equivalent product. The failure of the Company's  research and
development activities to result in





                                       22
<PAGE>   23
any commercially viable products would materially adversely affect the
Company's future prospects.

         Uncertainties Related to Clinical Trials.  The Company has limited
experience in conducting clinical trials and intends to rely primarily on
Bristol-Myers Squibb or other pharmaceutical companies with which it may
collaborate in the future for clinical development and regulatory approval of
its product candidates. Before obtaining regulatory approvals for the
commercial sale of its products, the Company or its collaborative partners will
be required to demonstrate through preclinical studies and clinical trials that
the proposed products are safe and effective for use in each target indication.
The results from preclinical studies and early clinical trials may not be
predictive of results that will be obtained in large-scale testing, and there
can be no assurance that the clinical trials conducted by the Company or its
partners will demonstrate sufficient safety and efficacy to obtain the required
regulatory approvals or will result in marketable products. One of the
Company's potential products, thalidomide, is believed to have caused severe
birth defects in children during the late 1950s and early 1960s. Although the
Company believes that the characteristics of thalidomide that may have affected
fetal development and caused birth defects by blocking new blood vessel growth
may make thalidomide useful in the prevention and treatment of angiogenic
disorders, there can be no assurance that clinical trials with the drug will
demonstrate its safety and efficacy or that the drug will not be associated
with other characteristics that prevent or limit its commercial use.

         In addition, clinical trials are often conducted with patients having
the most advanced stages of disease. During the course of treatment, these
patients can die or suffer other adverse medical effects for reasons that may
not be related to the pharmaceutical agent being tested, but which can
nevertheless affect clinical trial results. Various companies in the
pharmaceutical industry have suffered significant setbacks in advanced clinical
trials, even after attaining promising results in earlier trials.  Clinical
trials for the product candidates being developed by the Company and its
collaborators may be delayed by many factors. Any delays in, or termination of,
the clinical trials of any of the Company's product candidates, or the failure
of any clinical trials to meet applicable regulatory standards, could have a
material adverse effect on the Company's business, financial condition and
results of operations.

         Dependence on Bristol-Myers Squibb and Other Collaborative Partners
and Licensees.  The Company does not intend to conduct late-stage clinical
trials, or manufacture or market any of its product candidates in the
foreseeable future. The Company has granted Bristol-Myers Squibb the right to
conduct development, manufacturing, commercialization and marketing activities
relating to certain of the Company's antiangiogenesis technologies.
Accordingly, the Company is substantially dependent on Bristol-Myers Squibb for
the development, funding and commercial success of any of these product
candidates. In addition, payments from Bristol-Myers Squibb may constitute a
substantial portion of the Company's revenues for the next several years. The
BMS Collaboration may be terminated for any reason by Bristol-Myers Squibb on
six months' notice, in which event Bristol-Myers Squibb would have no further
funding obligation to the Company. In the event Bristol-Myers Squibb were to
terminate its agreement with the Company or otherwise fail to conduct its
collaborative activities successfully and in a timely manner, the preclinical
and clinical development or commercialization of the





                                       23
<PAGE>   24
licensed antiangiogenesis product candidates would be delayed or terminated.
Any such delay or termination could have a material adverse effect on the
Company's business, financial condition and results of operations. The success
of the BMS Collaboration will depend in part upon Bristol-Myers Squibb's own
competitive, marketing and strategic considerations, including the relative
advantages of alternative products being developed and marketed by
Bristol-Myers Squibb and its competitors. In addition, if Bristol-Myers Squibb
is unsuccessful in commercializing any product candidates, the Company's
business, financial condition and results of operations would be materially
adversely affected.

         The Company intends to enter into additional corporate alliances to
develop and commercialize products based upon its cell permeation technology
and any other technologies that may be acquired or developed by the Company.
The Company expects to grant to its collaborative partners rights to
commercialize any products developed under these collaborative agreements, and
the Company may rely on its collaborative partners to conduct research and
development efforts and clinical trials on, obtain regulatory approvals for,
and manufacture and market any products licensed to these partners. The amount
and timing of resources devoted to these activities generally will be
controlled by each such individual partner. As the Company generally expects to
retain only a royalty interest in sales or a percentage of profits of products
licensed to third parties, its revenues may be less than if it retained all
commercialization rights and marketed products directly. In addition, there can
be no assurance that the corporate partners will not pursue alternative
technologies or develop competitive products as a means for developing
treatments for the diseases targeted by the Company's programs.

         There can be no assurance that the Company will be successful in
establishing any additional collaborative arrangements, that products will be
successfully commercialized under any collaborative arrangement or that the
Company will derive any revenues from such arrangements. In addition, the
Company's strategy involves entering into multiple, concurrent strategic
alliances to pursue commercialization of its core technologies. There can be no
assurance that the Company will be able to manage simultaneous programs
successfully. With respect to existing and potential future strategic alliances
and collaborative arrangements, the Company will be dependent upon the
expertise and dedication of sufficient resources by these outside parties to
develop, manufacture or market products. Should a strategic alliance or
collaborative partner fail to develop or commercialize a product to which it
has rights, the Company's business, financial condition and results of
operations could be materially and adversely affected.

         Future Capital Needs and Commitments; Uncertainty of Additional
Funding.  The Company has incurred negative cash flows since inception and has
expended, and expects to continue to expend, substantial funds to continue its
research and development programs. The Company anticipates that its existing
resources and committed funding from Bristol-Myers Squibb will be sufficient to
meet the Company's planned expenditures during 1998, although there can be no
assurance that the Company will not require additional funds. There can be no
assurance that the results of research and development activities, progress of
preclinical studies or clinical trials, changes in or terminations of
relationships with strategic partners, changes in the focus, direction or costs
of the Company's research and development programs, competitive





                                       24
<PAGE>   25
and technological advances, the regulatory approval process or other factors
will not result in the expenditure of the Company's resources before such time.
The Company will require substantial funds in addition to existing working
capital to develop its product candidates and otherwise to meet its business
objective.

         The Company is a party to sponsored research agreements requiring it
to fund $4,100,000 through 1999 (including $3,000,000 to Children's Hospital).
Pursuant to the terms of certain license agreements, the Company is also
obligated to exercise diligence in bringing potential products to market and to
make certain milestone payments that, in some instances, are substantial. The
Company's failure to make any required sponsored research or milestone payment
could result in the termination of the relevant sponsored research or license
agreement, which could have a material adverse effect on the Company.

         The Company may seek additional funding through collaborative
arrangements and public or private financing, including equity financing. There
can be no assurance that such collaborative arrangements or additional
financing will be available on acceptable terms or at all. If additional funds
are raised by issuing equity securities, dilution to stockholders may result.
If adequate funds are not available, the Company may be required to delay,
reduce the scope of, or eliminate one or more of its research and development
programs or forfeit its rights to future technologies; to obtain funds through
arrangements with collaborative partners or others that may require the Company
to relinquish rights to certain of its technologies, product candidates or
products that the Company would otherwise seek to develop or commercialize
itself; or to license the rights to such products on terms that are not
favorable to the Company.

         Uncertainty of Government Regulatory Requirements; Lengthy Approval
Process.  The Company's research, development, preclinical and clinical trials,
manufacturing and marketing of most of its product candidates are subject to an
extensive regulatory approval process by the United States Food and Drug
Administration (the "FDA") and other regulatory agencies in the United States
and abroad. The process of obtaining FDA and other required regulatory
approvals for drug and biologic products, including required preclinical and
clinical testing, is lengthy, expensive and uncertain. There can be no
assurance that, even after such time and expenditures, the Company will be able
to obtain necessary regulatory approvals for clinical testing or for the
manufacturing or marketing of any products. The Company or its collaborators
may encounter significant delays or excessive costs in their efforts to secure
necessary approvals or licenses. Even if regulatory clearance is obtained, a
marketed product is subject to continual review, and later discovery of
previously unknown defects or failure to comply with the applicable regulatory
requirements may result in restrictions on a product's marketing or withdrawal
of the product from the market as well as possible civil or criminal sanctions.

         Competition; Risk of Technological Obsolescence.  The pharmaceutical
biotechnology industries are intensely competitive and competition from other
companies and other research and academic institutions is expected to increase.
Many of these companies have substantially greater financial and research and
development capabilities than the Company and have substantially greater
experience in undertaking preclinical and clinical testing of products,
obtaining regulatory approvals and manufacturing and marketing pharmaceutical
products. The





                                       25
<PAGE>   26
Company is aware of other companies engaged in the development of thalidomide
for various disease indications, including Celgene Corporation and Andrulis
Pharmaceuticals, and a number of other companies and academic institutions are
pursuing angiogenesis research and are testing other angiogenesis inhibitors.
The Company's blood oxygen enhancement product candidate will also compete for
certain applications with numerous other available therapeutics and with blood
and blood substitute products in development by others. In addition to
competing with universities and other research institutions in the development
of products, technologies and processes, the Company may compete with other
companies in acquiring rights to products or technologies from universities.

         Moreover, the pharmaceutical and biotechnology industries are rapidly
evolving fields in which developments are expected to continue at a rapid pace.
There can be no assurance that the Company will develop products that are more
effective or achieve greater market acceptance than competitive products, or
that the Company's competitors will not succeed in developing products and
technologies that are more effective than those being developed by the Company
or that would render the Company's products and technologies less competitive
or obsolete.

         Dependence on Patents and Other Proprietary Rights; Uncertainty of
Patent Position and Proprietary Rights.  The Company's success will depend in
part on its ability to obtain patent protection for its products, both in the
United States and abroad. The patent position of biotechnology and
pharmaceutical companies in general is highly uncertain and involves complex
legal and factual questions. There can be no assurance that any additional
patents will be granted or that patents issued to the Company will not be
challenged, invalidated or circumvented, or that the rights granted thereunder
will provide proprietary protection to the Company.  Furthermore, there can be
no assurance that others will not independently develop similar products or, on
patents issued to the Company or its collaborators, will not design around such
patents.

         Furthermore, the enactment of the legislation implementing the General
Agreement on Trade and Tariffs has resulted in certain changes to United States
patent laws that became effective on June 8, 1995. Most notably, the term of
patent protection for patent applications filed on or after June 8, 1995 is no
longer a period of seventeen years from the date of grant. The new term of a
United States patent will commence on the date of issuance and terminate twenty
years from the earliest effective filing date of the application. As the time
from filing to issuance of biotechnology patents is often more than three
years, a twenty-year term from the effective date of filing may result in a
substantially shortened term of patent protection, which may adversely impact
the Company's patent position. If this change results in a shorter period of
patent coverage, the Company's business could be adversely affected to the
extent that the duration and level of the royalties it is entitled to receive
from a collaborative partner is based on the existence of a valid patent.

         The Company's potential products may conflict with patents which have
been or may be granted to competitors, universities or others. As the
biotechnology industry expands and more patents are issued, the risk increases
that the Company's potential products may give rise to claims that they
infringe the patents of others. Such other persons could bring legal actions





                                       26
<PAGE>   27
against the Company claiming damages and seeking to enjoin clinical testing,
manufacturing and marketing of the affected products.  Any such litigation
could result in substantial cost to the Company and diversion of effort by the
Company's management and technical personnel. If any such actions are
successful, in addition to any potential liability for damages, the Company
could be required to obtain a license in order to continue to manufacture or
market the affected products. There can be no assurance that the Company would
prevail in any such action or that any license required under any such patent
would be made available on acceptable terms, if at all. Failure to obtain
needed patents, licenses or proprietary information held by others may have a
material adverse effect on the Company's business. In addition, if the Company
becomes involved in such litigation, it could consume a substantial portion of
the Company's time and resources.

         Composition of matter patent protection is not available for
thalidomide. The Company is aware of at least two other issued patents covering
certain non-antiangiogenic uses of thalidomide. Although the Company believes
that the claims in such patents will not interfere with the Company's proposed
use of thalidomide, there can be no assurance that the holders of such patents
will not be able to exclude the Company from using thalidomide for other
non-antiangiogenic uses of thalidomide.

         The Company also relies on trade secret protection for its
confidential and proprietary information. However, trade secrets are difficult
to protect and there can be no assurance 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
unpatented trade secrets. The Company requires its employees, consultants and
advisors to execute a confidentiality agreement upon the commencement of an
employment or consulting relationship with the Company.  The agreements
generally provide that all trade secrets and inventions conceived by the
individual and all confidential information developed or made known to the
individual during the term of the relationship shall be the exclusive property
of the Company and shall be kept confidential and not disclosed to third
parties except in specified circumstances. There can be no assurance, however,
that these agreements will provide meaningful protection for the Company's
proprietary information in the event of unauthorized use or disclosure of such
information.

         To the extent that consultants, key employees or other third parties
apply technological information independently developed by them or by others to
the Company's proposed projects, disputes may arise as to the proprietary
rights to such information which may not be resolved in favor of the Company.
Certain of the Company's consultants are employed by or have consulting
agreements with third parties and any inventions discovered by such individuals
generally will not become property of the Company.

         Dependence Upon Key Personnel and Consultants.  The Company is
dependent on certain of its executive officers and scientific personnel,
including John W. Holaday, Ph.D., the Company's Chairman, President and Chief
Executive Officer. The Company has entered into a three-year employment
agreement with Dr. Holaday effective January 1, 1996. Competition for qualified
employees among pharmaceutical and biotechnology companies is intense, and the
loss





                                       27
<PAGE>   28
of certain of such persons, or an inability to attract, retain and motivate
additional highly skilled scientific, technical and management personnel, could
materially adversely affect the Company's business and prospects. There can be
no assurance that the Company will be able to retain its existing personnel or
attract and retain additional qualified employees.

         The Company may also be dependent, in part, upon the continued
contributions of the lead investigators of the Company's sponsored research
programs. The Company's scientific consultants and collaborators may have
commitments to or consulting or advisory agreements with other entities that
may affect their ability to contribute to the Company or may be competitive
with the Company. Inventions or processes discovered by such persons will not
necessarily become the property of the Company, but may remain the property of
such persons or of such persons' full-time employers.

         Risk of Product Liability; Availability of Insurance.  The use of the
Company's potential products in clinical trials and the marketing of any
pharmaceutical products may expose the Company to product liability claims. The
Company has obtained a level of liability insurance coverage that it deems
appropriate for its current stage of development. However, there can be no
assurance that the Company's present insurance coverage is adequate. Such
existing coverage will not be adequate as the Company further develops
products, and no assurance can be given that in the future adequate insurance
coverage or indemnification by collaborative partners will be available in
sufficient amounts or at a reasonable cost. A successful product liability
claim could have a material adverse effect on the business and financial
condition of the Company.

         Uncertainty Related to Health Care Reimbursement and Reform Measures.
The Company's success may depend, in part, on the extent to which reimbursement
for the costs of therapeutic products and related treatments will be available
from third-party payors such as government health administration authorities,
private health insurers, managed care programs and other organizations. Over
the past decade, the cost of health care has risen significantly, and there
have been numerous proposals by legislators, regulators and third-party health
care payors to curb these costs. Some of these proposals have involved
limitations on the amount of reimbursement for certain products. There can be
no assurance that similar federal or state health care legislation will not be
adopted in the future or that any products sought to be commercialized by the
Company or its collaborators will be considered cost-effective or that adequate
third-party insurance coverage will be available for the Company to establish
and maintain price levels sufficient for realization of an appropriate return
on its investment in product development. Moreover, the existence or threat of
cost control measures could have an adverse effect on the willingness or
ability of Bristol-Myers Squibb or other potential collaborators to pursue
research and development programs related to the Company's product candidates.

         Hazardous Materials.  The Company's research and development involves
the controlled use of hazardous biological, chemical and radioactive materials.
The Company is subject to federal, state and local laws and regulations
governing the use, manufacture, storage, handling and disposal of such
materials and certain waste products. Although the Company believes that its
safety procedures for handling and disposing of such materials comply with the
standards





                                       28
<PAGE>   29
prescribed by such laws and regulations, the risk of accidental contamination
or injury from these materials cannot be completely eliminated. In the event of
such an accident, the Company could be held liable for any damages that result
and any such liability could have a material adverse effect on of the Company.

         No Manufacturing or Marketing Capacity.  The Company does not
generally expect to engage directly in manufacturing or marketing of products
in the near term, but may elect to do so in certain cases. The Company does not
currently have the capacity to manufacture or market products or any experience
in such activities. If the Company elects to perform these functions, the
Company will be required to either develop these capacities, or contract with
others to perform some or all of these tasks. The Company may be dependent to a
significant extent on corporate partners, licensees or other entities for
manufacturing and marketing of products.  If the Company engages directly in
manufacturing or marketing, the Company will require substantial additional
funds and personnel and will be required to comply with extensive regulations
applicable to such a facility. There can be no assurance that the Company will
be able to develop or contract for these capacities when required in connection
with the Company's business.

ITEM 2.  PROPERTIES

         The Company currently occupies an aggregate of approximately 13,500
square feet of office space (approximately 8,250 square feet of which is
laboratory space) in Rockville, Maryland pursuant to two leases.  One lease,
representing 1,900 square feet, is on a month to month basis and the other
lease expires in April 2003. The leases provide for total annual rent of
approximately $227,000 during 1998, subject to specified annual increases. The
Company is presently intending to lease a new facility.

ITEM 3.  LEGAL PROCEEDINGS

         The Company is a defendant in a lawsuit initiated in August 1995 in
the United States District Court for the Eastern District of Tennessee by
Bolling, McCool & Twist ("BMT"), a consulting firm. In the suit, BMT asserts
that the Company breached an agreement between BMT and the Company by failing to
pay BMT certain fees it asserts are owed under the agreement.  More
specifically, BMT has asserted a claim for the payment of services rendered in
the approximate amount of $50,000 and seeks a success fee in an unspecified
amount in connection with the BMS Collaboration.  The judge in the case
bifurcated the proceeding into two phases: an adjudication of whether the
Company breached its agreement with BMT and then a damage phase.  After a trial
on the merits the jury found in favor of BMT on the breach of contract claim.
However the damage phase of the trial has not been completed.  Despite the jury
verdict on the breach of contract claim, the Company is unable to predict with
certainty the eventual outcome of the lawsuit.  The Company intends to continue
to contest the action vigorously and believes that this proceeding will not
have a material adverse effect on the Company or on its financial condition,
although there can be no assurance that this will be the case.





                                       29
<PAGE>   30
ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

                 None.

                                    PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

         EntreMed's Common Stock trades on the Nasdaq National Market under the
symbol "ENMD".  The table below sets forth the high and low sales prices of the
Company's Common Stock as reported by the Nasdaq National Market for the
periods indicated.  These prices are based on quotations between dealers, do
not reflect retail mark-up, mark-down or commissions, and do not necessarily
represent actual transactions.

<TABLE>
<CAPTION>
                 1996                                                                High         Low
                 ----                                                                ----         ---
                 <S>                                                                <C>         <C>
                 Second Quarter (June 19, 1996 - June 30, 1996)                     16 1/4      14 7/8
                 Third Quarter (July 1, 1996 - September 30, 1996)                  18 5/8       8 7/8
                 Fourth Quarter (October 1, 1996 - December 31, 1996)               17 1/4          12

                 1997
                 ----
                 First Quarter (January 1, 1997 - March 31, 1997)                   18 1/2      12 1/4
                 Second Quarter (April 1, 1997 - June 30, 1997)                     14 3/4       8 1/2
                 Third Quarter (July 1, 1997 - September 30, 1997)                  12 3/4       8 7/8
                 Fourth Quarter (October 1, 1997 - December 31, 1997)               15 1/2       6 1/2

                 1998
                 ----
                 First Quarter (January 1, 1997 - March 19, 1998)                   15 3/4       9 3/4
</TABLE>

         At March 19, 1998, there were approximately 350 shareholders of
record, and as of that date, the Company estimates there were approximately
1,000 beneficial owners holding stock in nominee or "street" name.

         The Company has not paid any cash dividends and does not anticipate
paying any cash dividends in the foreseeable future.

         In June 1996, the Registrant issued to Bristol-Myers Squibb Company
333,333 shares of Common Stock at a purchase price of $15.00 per share.





                                       30
<PAGE>   31
         In January through March 1996, the Registrant issued an aggregate of
83,991 shares of Common Stock to Samuel R. Dunlap, Jr., a director of the
Registrant, upon the exercise of stock options exercisable at $1.50 per share.

         In December 1996, the Registrant issued to a former employee an
aggregate of 15,686 shares of Common Stock upon the exercise of stock options
for an aggregate consideration of $99,998 or $6.375 per share.

         During the year ended December 31, 1997, the Registrant issued an
aggregate of 244,170 shares of Common Stock upon the exercise of stock options
and warrants for an aggregate consideration of $504,632 at exercise prices
ranging from $1.50 to $9.00 per share.

         Except as otherwise noted above, (i) the above transactions were
private transactions not involving a public offering and were exempt from the
registration provisions of the Securities Act of 1933, as amended, pursuant to
Section 4(2) thereof, (ii) the sale of securities was without the use of an
underwriter and (iii) the certificates evidencing the shares bear a restrictive
legend permitting the transfer thereof only upon registration of the shares or
an exemption under the Securities Act of 1933, as amended.





                                       31
<PAGE>   32
ITEM 6.   SELECTED FINANCIAL DATA

         The following selected financial data as of December 31, 1997, and for
each of the five years in the period ended December 31, 1997, are from the
financial statements of EntreMed, Inc., which have been audited by Ernst &
Young LLP, independent auditors.  The data should be read in conjunction with
the financial statements, related notes and other financial information
included herein.

<TABLE>
<CAPTION>
                                                             Year Ended December 31,
                                                            -----------------------
STATEMENTS OF OPERATIONS DATA:         1997           1996            1995           1994           1993
                                   ---------------------------------------------------------------------------
<S>                                 <C>          <C>              <C>           <C>            <C>
Revenues
   Collaborative research
         and development            $  4,342,369  $  4,425,000    $    347,501   $     -        $     -
   License fees                          200,000       200,000          16,667         -              -
   Grant Revenues                        215,119        -              347,001         90,185         -
Total revenues                         4,757,488     4,625,000         711,169         90,185         -

Expenses:
   Research and development            8,998,705     7,553,793       5,939,512      3,673,929       4,772,652
   General and administrative          4,915,724     3,435,501       2,458,976      1,549,705       1,552,143
   Interest expense                        1,418        27,267          65,754         -              -
   Interest income                    (2,621,630)   (1,621,729)        (44,854)       (18,993)        (85,939)

Net Loss                              (6,536,729)  $(4,769,832)    $(7,708,219)   $(5,114,456)    $(6,238,856)

Net Loss per share                      $  (0.54)     $  (0.50)       $  (1.41)      $  (1.09)       $  (1.57)

Weighted average number of
   shares outstanding                 12,158,372     9,532,671       5,485,763      4,712,776       3,980,899

Pro forma net loss per share(1)                        $ (0.46)         $(1.03)

Pro forma weighted average
      number of shares
      outstanding (1)                               10,422,781       7,485,763

BALANCE SHEET DATA:
   Cash and cash equivalents
      and short-term investments      45,245,071    52,720,829       6,885,099        218,619       2,188,665
   Working capital                    41,454,371    49,049,124       5,689,810       (332,427)      2,112,738
   Total assets                       47,838,663    54,146,339      10,146,383        843,742       3,258,995
   Deferred revenue, less
      current portion                  1,341,666     2,236,666       2,741,666         -              -
   Accumulated deficit               (31,793,532)  (25,256,803)    (20,486,971)   (12,778,752)     (7,280,210)
   Total stockholders' equity         41,953,094    47,694,191       3,601,260        292,696       2,798,982
</TABLE>

- ----------
(1)  Pro forma net loss per share and weighted average shares outstanding for
the years ended December 31, 1995 and 1996 give effect to the automatic
conversion of 3,000,000 outstanding shares of Preferred Stock into 2,000,000
shares of Common Stock on June 19, 1996, the effective date of the Company's
initial public offering.  See Notes 1 and 8 of Notes to Financial Statements.





                                       32
<PAGE>   33
ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

         The following discussion should be read in conjunction with the
Consolidated Financial Statements and Notes thereto appearing elsewhere in this
report.  See"---Risk Factors".

OVERVIEW

         Since its inception in September 1991, the Company has devoted
substantially all of its efforts and resources to sponsoring and conducting
research and development on its own behalf and through collaborations with
corporate partners and academic research and clinical institutions, and
establishing its facilities and hiring personnel.

         With the exception of license fees and research and development
funding from Bristol-Myers Squibb and certain research grants, the Company has
not generated any revenue from operations. For the period from inception to
December 31, 1997, the Company incurred a cumulative net loss of approximately
$31,800,000. The Company has incurred additional losses since such date and
expects to incur additional operating losses for the foreseeable future. In
December 1995, the Company entered into the BMS Collaboration and, through
December 31, 1997, had received approximately $13,405,000 in license and
research and development fees and expense reimbursements and an $11,500,000
equity investment pursuant to this alliance. The Company expects that its
revenue sources for at least the next several years will be limited to research
grants and future collaboration payments from Bristol-Myers Squibb and from
other collaborators under arrangements that may be entered into in the future.
The timing and amounts of such revenues, if any, will likely fluctuate sharply
and depend upon the achievement of specified milestones, and results of
operations for any period may be unrelated to the results of operations for any
other period. See "Business - Collaborations and License Agreements".

RESULTS OF OPERATIONS

         Years Ended December 31, 1997, 1996, and 1995.

         Revenues under collaborative research and development agreements were
approximately $4,342,000, $4,425,000, and $348,000 and license fees were
approximately $200,000, $200,000, and $17,000 in the years ended December 31,
1997, 1996, and 1995, respectively. The collaborative research and development
fees relate to the amortization over five years of a one-time payment of
$2,500,000 ($500,000, $500,000 and $42,000 recognized in 1997, 1996 and 1995,
respectively); the amortization of the semi-annual payment of $1,835,000 as
called for under the BMS Collaboration ($3,670,000, $3,670,000 and $306,000
recognized in 1997, 1996 and 1995, respectively); and $172,000 and $255,000
recognized in 1997 and 1996, respectively, as reimbursement for clinical
studies. The license fees represent the amortization over five years of a
one-time $1,000,000 license fee under the BMS Collaboration, a portion of which
was paid to Children's Hospital. Approximately one month's amortization of
these amounts is included in 1995 as the BMS Collaboration was entered into in
December 1995 compared to twelve full months for 1997 and 1996.  In addition,
revenues during 1995 included grant revenues from the





                                       33
<PAGE>   34
World Health Organization and SBIR grants of $347,000.  In 1997, there were
grant revenues of approximately $215,000 from a Small Business Innovative
Research program from the National Institutes of Health.

         Research and development expenses increased by 27.2% from
approximately $5,940,000 in 1995 to $7,554,000 in 1996 and increased by 19.1%
to approximately $8,999,000 in 1997, due primarily to increased efforts in the
Company's internal and sponsored research and product development programs
related to its antiangiogenesis and blood cell permeation technologies.
Research and development expenditures included sponsored research payments of
approximately $2,570,000, $3,461,000, and $3,700,000 and internal research and
development expenses of approximately $3,370,000, $4,093,000, and $5,300,000 in
1995, 1996 and 1997, respectively.

         General and administrative expenses increased by 43.1% in 1997 to
approximately $4,916,000 from $3,436,000 in 1996 and increased by 39.7% in 1996
from $2,459,000 in 1995.  The 1997 and 1996 increases resulted primarily from
increases in administrative costs associated with being a public company,
investigating potential strategic relationships, obtaining professional
services and adding administrative staff to support the research scientists and
collaborative efforts the Company is conducting.  Interest income increased
from $45,000 to $1,622,000 in 1995 and 1996, respectively, and to $2,622,000 in
1997.  The 1996 and 1997 increases are due to the Company investing in
interest-bearing securities the net proceeds from the IPO and the BMS
Collaboration. The Company had interest expense of approximately $66,000,
$27,000, and $1,400 in 1995, 1996, and 1997, respectively, as a result of
capital lease obligations.

LIQUIDITY AND CAPITAL RESOURCES

         From inception through December 31, 1997, the Company financed its
operations from (i) the net proceeds of private placements of equity securities
which raised approximately $17,000,000, (ii) payments from Bristol-Myers
Squibb, including $9,700,000 received in December 1995 (of which $6,500,000 was
an equity investment), $11,535,000 received in 1996 (of which $5,000,000 was an
equity investment), and $3,670,000 in 1997, (iii) various grants from the World
Health Organization and Small Business Innovation Research ("SBIR") grants
totaling approximately $652,000, (iv) its June 1996 Initial Public Offering
("IPO") which raised net proceeds of approximately $43,541,000 and (v) proceeds
of approximately $654,000 under capital leases.

         Bristol-Myers Squibb is obligated to make additional semi-annual
payments to the Company of $1,835,000 in each of June and December through June
2000 as well as additional payments in the event certain mostly late-stage
regulatory milestones are achieved.  Bristol-Myers Squibb may terminate the
collaboration agreement and return the licensed technology to the Company at
any time upon six months' notice, in which event it would have no further
funding obligation to the Company.

         At December 31, 1997, the Company had working capital of approximately
$41,500,000. The Company's cash resources have been used to finance research
and development, including





                                       34
<PAGE>   35
sponsored research, capital expenditures, including leasehold improvements to
the Company's laboratory facility, and general and administrative expenses.
Over the next several years, the Company expects to incur substantial
additional research and development costs, including costs related to
early-stage research in areas not reimbursed by Bristol-Myers Squibb,
preclinical and clinical trials, increased administrative expenses to support
its research and development operations and increased capital expenditures for
expanded research capacity, various equipment needs and facility improvements.

         At December 31, 1997, the Company was a party to sponsored research
agreements requiring it to fund an aggregate of approximately $4,100,000
through 1999 (including $3,000,000 to Children's Hospital) and license
agreements requiring milestone payments of up to $4,360,000 and additional
payments upon attainment of regulatory milestones. In addition, the Company
agreed to provide funding to Cytokine Sciences, Inc., its 85% owned subsidiary,
in an aggregate amount of $1,600,000 during the first two years commencing July
2, 1996, with an additional $1,500,000 to be provided at the sole option of the
Company during the third year.  The Company is also a party to an office lease
expiring in 2003 with total future minimum lease payments of approximately
$1,227,000. See Note 11 of Notes to Financial Statements.

         At December 31, 1997, the Company had available net operating loss
carryforwards of $30,224,000 to offset any future taxable income for federal
tax purposes. The utilization of the loss carryforwards to reduce future income
taxes will depend on the Company's ability to generate sufficient taxable
income prior to the expiration of the net operating loss carryforwards. The
carryforwards begin to expire in the year 2006. However, the Tax Reform Act of
1986 limits the maximum annual use of net operating loss and tax credit
carryforwards in certain situations where changes occur in the stock ownership
of a corporation. For financial reporting purposes, a valuation allowance has
been recognized to reduce the net deferred tax assets to zero due to
uncertainties with respect to the Company's ability to generate taxable income
in the future sufficient to realize the benefit of deferred income tax assets.
See Note 7 of Notes to Financial Statements.

         The Company believes that its existing resources and committed funding
from Bristol-Myers Squibb will be sufficient to meet the Company's planned
expenditures during 1998, although there can be no assurance the Company will
not require additional funds.  The Company's working capital requirements will
depend upon numerous factors, including the progress of the Company's research
and development programs (which may vary as product candidates are added or
abandoned), preclinical testing and clinical trials, achievement of regulatory
milestones, the Company's corporate partners fulfilling their obligations to
the Company, the timing and cost of seeking regulatory approvals, the level of
resources that the Company devotes to the development of manufacturing,
marketing and sales capabilities, if any, technological advances, the status of
competitors, the ability of the Company to maintain existing and establish new
collaborative arrangements with other companies to provide funding to the
Company to support these activities and other factors. In any event, the
Company will require substantial funds in addition to the present existing
working capital to develop its product candidates and otherwise to meet its
business objectives.





                                       35
<PAGE>   36
YEAR 2000

         The Year 2000 Issue is the result of computer programs being written
using two digits rather than four to define the applicable year.  As a result,
those computer programs having time-sensitive software would recognize a date
using "00" as the year 1900 rather than the year 2000.

         Based on a recent assessment, the Company determined that its
accounting software will need to be updated or modified.  This should be
accomplished through updates from the software manufacturer.  The Company does
not expect any material costs associated with this modification or any
disruptions to its primary operations.  The Company anticipates no other year
2000 problems which are reasonably likely to have a material adverse effect on
the Company's operations.  There can be no assurance, however, that such
problems will not arise.

IMPACT OF RECENTLY ISSUED ACCOUNTING STANDARDS

         In June 1997, the Financial Accounting Standards Board ("FASB") issued
Statement No. 130, Reporting Comprehensive Income ("Statement 130").  Statement
130 establishes new standards for the reporting and display of comprehensive
income and its components in a full set of general purpose financial
statements.  These new standards require that all items recognized as
components of comprehensive income be reported in a financial statement that is
displayed with the same prominence as other financial statements.  Statement
130 is effective for fiscal years beginning after December 15, 1997.  The
adoption of Statement 130 will not impact the Company's consolidated financial
statements.

         In June 1997, the FASB issued Statement 131, Disclosures About
Segments of an Enterprise and Related Information ("Statement 131").  Statement
131 changes the way public companies report segment information in annual
financial statements and also requires those companies to report selected
segment information in interim financial reports.  Statement 131 is effective
for years beginning after December 15, 1997.  The adoption of Statement 131
will not have a significant impact on the Company's consolidated financial
statements.

INFLATION

         Management does not believe that inflation has a material impact on
the Company's results of operations.

ITEM 7(a)   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

         N/A.

ITEM 8.     FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

         The response to this item is submitted in a separate section of this
report.  See Index to Consolidated Financial Statements on Page F-1.





                                       36
<PAGE>   37
ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE.

         None.

                                    PART III

         The information called for by Item 10: Directors and Executive
Officers of the Registrant; Item 11: Executive Compensation; Item 12: Security
Ownership of Certain Beneficial Owners and Management; and Item 13: Certain
Relationships and Related Transactions will be included in and is incorporated
by reference from the registrant's definitive proxy statement to be filed
pursuant to Regulation 14A of the Securities Exchange Act of 1934 within 120
days after the close of its fiscal year.


                                    PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

(a) 1.   FINANCIAL STATEMENTS - An index to Consolidated Financial Statements
         appears on page F-1.

    2.   Schedules

         All financial statement schedules are omitted because they are not
applicable, not required under the instructions or all the information required
is set forth in the financial statements or notes thereto.

    3.   Exhibits
         
          3.1*          Amended and Restated Certificate of Incorporation of 
                        the Registrant
         
          3.1(a)        Amendment to the Certificate of Incorporation
         
          3.2*          Form of Certificate of Amendment to the Amended and 
                        Restated Certificate of Incorporation of the Registrant
         
          3.3*          By-laws of the Registrant
         
         10.1*          Research Collaboration and License Agreement, dated 
                        December 7, 1995, between the Registrant and 
                        Bristol-Myers Squibb Company ("BMS")





                                       37
<PAGE>   38
         10.2*          Restricted Stock Purchase Agreement, dated December 7, 
                        1995, between the Registrant and BMS
         
         10.3*          Warrant to Purchase Common Stock, dated December 7, 
                        1995, issued by the Registrant to BMS
         
         10.4*          Registration Rights Agreement, dated December 7, 1995, 
                        between the Registrant and BMS
         
         10.5*          Research Agreement, dated September 29, 1993, between 
                        the Registrant and Children's Hospital
         
         10.6*          Amendment to Research Agreement, dated August 23, 1995, 
                        between the Registrant and Children's Hospital
         
         10.7*          License Agreement, dated May 26, 1994, between 
                        Children's Medical Center Corporation ("CMCC") and the 
                        Registrant
         
         10.8*          Amendment to License Agreement, dated August 23, 1995, 
                        between CMCC and the Registrant
         
         10.9*          License Agreement, dated May 26, 1994, between CMCC 
                        and the Registrant
         
         10.10*         Amendment to License Agreement, dated August 23, 1995, 
                        between CMCC and the Registrant
         
         10.11*         Sponsored Research Agreement, dated November 5, 1992, 
                        between the Registrant and CBR Laboratories, Inc.
                        ("CBRL")
         
         10.12*         Licensing Agreement, dated November 5, 1992, between 
                        the Registrant and CBRL
         
         10.13*         Employment Agreement, dated as of January 1, 1996, 
                        between the Registrant and John W. Holaday, Ph.D.
         
         10.14*         1992 Stock Incentive Plan
         
         10.15*         Amended and Restated 1996 Stock Option Plan
                
         
         10.16*         Form of Stock Option Agreement
         
         10.17*         Consulting Agreement between the Registrant and Samuel 
                        R. Dunlap, Jr.
         
         10.18*         Consulting Agreement between the Registrant and Steve 
                        Gorlin (superseded by Exhibit 10.18a)
         




                                       38
<PAGE>   39
         10.18(a)*      Termination Agreement dated May 15, 1996 effective 
                        August 1, 1996, between the Registrant and Steve Gorlin
         
         10.19*         Master Equipment Lease Agreement, dated April 10, 1995, 
                        between the Registrant and MMC/GATX Partnership No. 1
         
         10.20*         Lease between the Registrant and Red Gate III Limited 
                        Partnership
         
         10.21*         Form of Indemnification Agreement
         
         10.22*         Research and License Agreement, dated August 1993, 
                        between the Registrant and Innovative Therapeutics, Inc.
         
         10.23**        Agreement between Cytokine Sciences, Inc. and 
                        Innovative Therapeutics, Inc.
         
         10.24***       License Agreement between Children's Hospital Medical 
                        Center Corporation and EntreMed, Inc. signed December
                        5, 1996 regarding Endostatin(TM) protein, An Inhibitor  
                        of Angiogenesis
         
         10.25***       License Agreement between Children's Hospital Medical  
                        Center Corporation and EntreMed, Inc. signed December 
                        20, 1996 regarding Estrogenic Compounds as 
                        Anti-Mitotic Agents
         
         10.26          Agreement between Bristol-Myers Squibb and EntreMed,  
                        Inc. signed August 5, 1997 regarding Termination of 
                        Collaborative Research and License Agreement with 
                        Respect to Thalidomide Products
         
         10.27****      Amendment to the 1996 Stock Option Plan
         
         21             Subsidiaries of the Registrant
         
         23.1           Consent of Independent Auditors
         
         27.1           Financial Data Schedule
         
         27.2           Financial Data Schedule

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

*        Incorporated by reference to the Company's Registration Statement on
         Form S-1 (File No. 333-3536) declared effective by the Securities and
         Exchange Commission on June 11, 1996.





                                       39
<PAGE>   40
**       Incorporated by reference to the Company's Form 10-Q for the quarter
         ended June 30, 1996 previously filed with the Securities and Exchange
         Commission.

***      Incorporated by reference to the Company's Form 10-K for the year
         ended December 31, 1997 previously filed with the Securities and
         Exchange commission.

****     Compensatory Plan or Arrangement.

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

(b)      Reports on Form 8-K

         The Company did not file any reports on Form 8-K during the three
         month period ended December 31, 1997.





                                       40
<PAGE>   41
                           ANNUAL REPORT ON FORM 10-K

                   ITEM 8, ITEM 14(a)(1) and (2), (c) and (d)

         LIST OF FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULES

                  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

                                CERTAIN EXHIBITS

                          YEAR ENDED DECEMBER 31, 1997

                                 ENTREMED, INC.

                              ROCKVILLE, MARYLAND
<PAGE>   42
FORM 10-K - ITEM 14(a)(1) AND (2)

ENTREMED, INC. AND SUBSIDIARIES

List of Financial Statements and Financial Statement Schedules

The following consolidated financial statements of EntreMed, Inc. and
subsidiaries are included in Item 8:

<TABLE>
<S>                                                                                                                       <C>
Report of Independent Auditors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1
Consolidated Balance Sheets as of December 31, 1997 and 1996  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2
Consolidated Statements of Operations for the years ended
  December 31, 1997, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3
Consolidated Statements of Stockholders' Equity for the years ended
  December 31, 1997, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4
Consolidated Statements of Cash Flows for the years ended
  December 31, 1997, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5
Notes to Consolidated Financial Statements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6
</TABLE>

The following consolidated financial statement schedules of EntreMed, Inc. and
subsidiaries are included in Item 14(d):

None

All other schedules for which provision is made in the applicable accounting
regulation of the Securities and Exchange Commission are not required under the
related instructions or are inapplicable and therefore have been omitted.
<PAGE>   43





                       Consolidated Financial Statements

                                 EntreMed, Inc.

                  Years ended December 31, 1997, 1996 and 1995
                      with Report of Independent Auditors
<PAGE>   44
                                 EntreMed, Inc.

                       Consolidated Financial Statements


                  Years ended December 31, 1997, 1996 and 1995




                                    CONTENTS

<TABLE>
<S>                                                                                                                     <C>
Report of Independent Auditors  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   1

Consolidated Financial Statements

Consolidated Balance Sheets as of December 31, 1997 and 1996  . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
Consolidated Statements of Operations for the years ended
  December 31, 1997, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
Consolidated Statements of Stockholders' Equity for the years ended
  December 31, 1997, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
Consolidated Statements of Cash Flows for the years ended
  December 31, 1997, 1996 and 1995. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
Notes to Consolidated Financial Statements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
</TABLE>
<PAGE>   45





                         Report of Independent Auditors

Board of Directors
EntreMed, Inc.

We have audited the accompanying consolidated balance sheets of EntreMed, Inc.
as of December 31, 1997 and 1996, and the related consolidated statements of
operations, stockholders' equity and cash flows for each of the three years in
the period ended December 31, 1997.  These consolidated financial statements
are the responsibility of the Company's management.  Our responsibility is to
express an opinion on these 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 assessing 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 consolidated financial position of
EntreMed, Inc. at December 31, 1997 and 1996 and the consolidated results of
its operations and its cash flows for each of the three years in the period
ended December 31, 1997, in conformity with generally accepted accounting
principles.


                                            ERNST & YOUNG LLP


Atlanta, Georgia
February 5, 1998





                                                                             F-1
<PAGE>   46
                                 EntreMed, Inc.

                          Consolidated Balance Sheets

<TABLE>
<CAPTION>
                                                                                    DECEMBER 31,
                                                                             1997                 1996
                                                                     --------------------------------------
 <S>                                                                   <C>                  <C>
 ASSETS
 Current assets:
   Cash and cash equivalents                                           $  18,232,491        $  33,051,206
   Short-term investments                                                 27,012,580           19,669,623
   Account receivable                                                         84,151                    -
   Interest receivable                                                       520,457              401,673
   Prepaid expenses and other                                                 86,095               97,962
                                                                     --------------------------------------
 Total current assets                                                     45,935,774           53,220,464

 Furniture and equipment, net                                              1,498,781              824,559

 Other assets                                                                404,108              101,316
                                                                     --------------------------------------
 Total assets                                                          $  47,838,663        $  54,146,339
                                                                     ======================================

 LIABILITIES AND STOCKHOLDERS' EQUITY
 Current liabilities:
   Accounts payable                                                    $     683,201        $     600,303
   Accrued liabilities                                                     1,265,905              957,718
   Capital leases payable                                                          -              104,152
   Deferred revenue (Note 5)                                               2,532,297            2,509,167
                                                                     --------------------------------------
   Total current liabilities                                               4,481,403            4,171,340

 Deferred revenue, less current portion (Note 5)                           1,341,666            2,236,666

 Minority interest                                                            62,500               44,142

 Stockholders' equity:
   Convertible preferred stock, $1.00 par and  $1.50 liquidation
     value:
     5,000,000 shares authorized, none issued and outstanding at
       December 31, 1997 and 1996, respectively                                    -                    -
   Common stock, $.01 par value:
     20,000,000 shares authorized, 12,253,768 and 12,009,598
       shares issued and outstanding at December 31, 1997 and
       1996, respectively                                                    122,538              120,096
   Additional paid-in capital                                             73,624,088           72,830,898
   Accumulated deficit                                                   (31,793,532)         (25,256,803)
                                                                     --------------------------------------
 Total stockholders' equity                                               41,953,094           47,694,191
                                                                     --------------------------------------
 Total liabilities and stockholders' equity                            $  47,838,663        $  54,146,339
                                                                     ======================================
</TABLE>



See accompanying notes.





                                                                             F-2
<PAGE>   47
                                 EntreMed, Inc.

                     Consolidated Statements of Operations


<TABLE>
<CAPTION>
                                                                 YEAR ENDED DECEMBER 31,
                                                       1997               1996               1995
                                                 ------------------------------------------------------
<S>                                                 <C>                <C>                <C>
Revenues:
  Collaborative research and development
    (Note 5)                                        $ 4,342,369        $ 4,425,000        $   347,501
  Licensing (Note 5)                                    200,000            200,000             16,667
  Grant revenues                                        215,119                  -            347,001
                                                 ------------------------------------------------------
                                                      4,757,488          4,625,000            711,169

Costs and expenses:
  Research and development                            8,998,705          7,553,793          5,939,512
  General and administrative                          4,915,724          3,435,501          2,458,976
                                                 ------------------------------------------------------
                                                     13,914,429         10,989,294          8,398,488
Interest expense                                         (1,418)           (27,267)           (65,754)
Investment income                                     2,621,630          1,621,729             44,854
                                                 ------------------------------------------------------

Net loss                                            $(6,536,729)       $(4,769,832)       $(7,708,219)
                                                 ======================================================

Net loss per share (basic and diluted)              $     (0.54)       $     (0.50)       $     (1.41)
                                                 ======================================================

Weighted average number of shares outstanding
  (basic and diluted)                                12,158,372          9,532,671          5,485,763
                                                 ======================================================

Pro forma net loss per share                                           $     (0.46)       $     (1.03)
                                                                    ===================================
Pro forma weighted average number of shares
  outstanding                                                           10,422,781          7,485,763
                                                                    ===================================
</TABLE>




See accompanying notes.





                                                                             F-3
<PAGE>   48


                                 EntreMed, Inc.

                Consolidated Statements of Stockholders' Equity



<TABLE>
<CAPTION>

                                                           COMMON STOCK                PREFERRED STOCK
                                                    ---------------------------  ------------------------------
                                                       SHARES        AMOUNT         SHARES         AMOUNT
                                                    ------------------------------------------------------------
<S>                                                  <C>           <C>            <C>           <C>
Balance at January 1, 1995                            5,064,101    $ 50,641        3,000,000    $ 3,000,000
  Issuance of common stock for options exercised
    at $1.50 per share                                   42,663         427                -              -
  Issuance of common stock for compensation to
    directors at $6.38 per share                         12,150         121                -              -
  Sale of common stock at $6.38 per share, net of
    offering costs of approximately $180,000            710,862       7,109                -              -
  Sale of common stock in connection with research
    agreement at $12.00 per share                       541,666       5,417                               -
  Sale of common stock at $12.00 per share                5,146          51                -              -
  Net loss                                                    -           -                -              -
                                                    ------------------------------------------------------------
Balance at December 31, 1995                          6,376,588      63,766        3,000,000      3,000,000
  Issuance of common stock for options exercised
    at $1.50 to $6.38 per share                          99,677         997                -              -
  Initial public offering of 3,200,000 shares of
    common stock and private placement of 333,333
    shares at $15.00 per share, net of offering
    costs of approximately $4,459,000                 3,533,333      35,333                -              -
  Automatic conversion of preferred stock to
    common stock upon initial public offering         2,000,000      20,000       (3,000,000)    (3,000,000)
  Warrants issued for consulting services                     -           -                -              -
  Net loss                                                    -           -                -              -
                                                    ------------------------------------------------------------
Balance at December 31, 1996                         12,009,598     120,096                -              -
  Issuance of common stock for options exercised        244,170       2,442                -              -
  Warrants issued for consulting services                     -           -                -              -
  Net loss                                                    -           -                -              -
                                                    ------------------------------------------------------------
Balance at December 31, 1997                         12,253,768    $122,538                -    $         -
                                                    ============================================================


<CAPTION>

                                                    ADDITIONAL
                                                     PAID-IN        ACCUMULATED
                                                     CAPITAL          DEFICIT           TOTAL
                                                    ----------------------------------------------
<S>                                                 <C>             <C>              <C>
Balance at January 1, 1995                          $10,020,807     $(12,778,752)    $   292,696
  Issuance of common stock for options exercised
    at $1.50 per share                                   63,573                -          64,000
  Issuance of common stock for compensation to
    directors at $6.38 per share                         77,379                -          77,500
  Sale of common stock at $6.38 per share, net of
    offering costs of approximately $180,000          4,306,382                -       4,313,491
  Sale of common stock in connection with research
    agreement at $12.00 per share                     6,494,583                -       6,500,000
  Sale of common stock at $12.00 per share               61,741                -          61,792
  Net loss                                                    -       (7,708,219)     (7,708,219)
                                                    ----------------------------------------------
Balance at December 31, 1995                         21,024,465      (20,486,971)      3,601,260
  Issuance of common stock for options exercised
    at $1.50 to $6.38 per share                         225,002                -         225,999
  Initial public offering of 3,200,000 shares of
    common stock and private placement of 333,333
    shares at $15.00 per share, net of offering
    costs of approximately $4,459,000                48,505,431                -      48,540,764
  Automatic conversion of preferred stock to
    common stock upon initial public offering         2,980,000                -               -
  Warrants issued for consulting services                96,000                -          96,000
  Net loss                                                    -       (4,769,832)     (4,769,832)
                                                    ----------------------------------------------
Balance at December 31, 1996                         72,830,898      (25,256,803)     47,694,191
  Issuance of common stock for options exercised        502,190                -         504,632
  Warrants issued for consulting services               291,000                -         291,000
  Net loss                                                    -       (6,536,729)     (6,536,729)
                                                    ----------------------------------------------
Balance at December 31, 1997                        $73,624,088     $(31,793,532)    $41,953,094
                                                    ==============================================
</TABLE>



See accompanying notes.





                                                                             F-4
<PAGE>   49

                                 EntreMed, Inc.

                     Consolidated Statements of Cash Flows

<TABLE>
<CAPTION>
                                                                       YEAR ENDED DECEMBER 31
                                                                1997            1996              1995
                                                           ----------------------------------------------
 <S>                                                        <C>              <C>            <C>
 CASH FLOWS FROM OPERATING ACTIVITIES
 Net loss                                                   $(6,536,729)     $(4,769,832)    $(7,708,219)
 Adjustments to reconcile net loss to net cash used by
   operating activities:
     Depreciation and amortization                              336,668          190,960         201,593
     Stock and warrants issued for compensation and
       consulting expense                                       291,000           96,000          77,500
     Minority interest                                           18,358                -               -
     Changes in assets and liabilities:
       Account receivable                                       (84,151)       2,500,000      (2,500,000)
       Interest receivable                                     (118,784)        (397,657)         (4,016)
       Prepaid expenses and other                                 9,075          (98,360)              -
       Accounts payable                                          82,898          233,053        (183,796)
       Accrued liabilities                                      308,187          615,942         341,776
       Deferred revenue (Note 5)                               (871,870)        (589,999)      5,335,832
                                                           ----------------------------------------------
 Net cash used by operating activities                       (6,565,348)      (2,219,893)     (4,439,330)

 CASH FLOWS FROM INVESTING ACTIVITIES
 Purchases of short-term investments                        (32,014,130)     (34,563,369)             -
 Maturities of short-term investments                        24,671,173       14,893,746              -
 Other investments                                             (300,000)        (100,000)             -
 Purchases of furniture and equipment                        (1,010,890)        (215,027)       (210,829)
                                                           ----------------------------------------------
 Net cash used by investing activities                       (8,653,847)     (19,984,650)       (210,829)

 CASH FLOWS FROM FINANCING ACTIVITIES
 Sales of common stock                                          504,632       48,766,763      10,939,283
 Proceeds from sale lease-back                                        -                -         654,020
 Payment of lease obligation                                   (104,152)        (396,113)       (276,664)
 Repayment of note payable                                            -                -        (510,000)
 Proceeds from note payable                                           -                -         510,000
                                                           ----------------------------------------------
 Net cash provided by financing activities                      400,480       48,370,650      11,316,639

 Net increase (decrease) in cash and cash equivalents       (14,818,715)      26,166,107       6,666,480
 Cash and cash equivalents at beginning of year              33,051,206        6,885,099         218,619
                                                           ----------------------------------------------
 Cash and cash equivalents at end of year                   $18,232,491      $33,051,206    $  6,885,099
                                                           ==============================================

 SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION AND
   NONCASH INVESTMENT AND FINANCING ACTIVITIES
 Interest paid                                              $     1,418      $    27,267    $    65,754
                                                           ==============================================

 Purchase of furniture and equipment in exchange for
   minority interest                                        $         -      $    44,118    $         -
                                                           ==============================================
 Equipment purchased under capital lease                    $         -      $         -    $   122,909
                                                           ==============================================
</TABLE>

See accompanying notes.





                                                                             F-5
<PAGE>   50
                                 EntreMed, Inc.

                   Notes to Consolidated Financial Statements

                  Years ended December 31, 1997, 1996 and 1995


1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

EntreMed, Inc. (the "Company") is engaged primarily in the research and
development of biopharmaceutical products that address the role of blood and
blood vessels in the prevention and treatment of a broad range of diseases.
The Company's core technologies include (i) an antiangiogenesis program focused
on the development of proprietary products intended to inhibit the abnormal
growth of new blood vessels associated with cancer and certain causes of
blindness and (ii) a blood cell permeation device designed to enhance the
ability of red blood cells to deliver oxygen to organs and tissues and which
may also be used to deliver drugs, genes or other therapeutic agents that
otherwise would not readily diffuse through blood cell membranes.

The Company's strategy is to accelerate development of its antiangiogenesis and
cell permeation technologies as well as other promising technologies which the
Company perceives to have clinical and commercial potential.  The principal
elements of the Company's strategy are (i) to focus its resources on current
core technologies, (ii) to broaden its product and technology portfolio through
sponsored research collaborations with academic institutions, government
organizations and private enterprises, (iii) to augment product development
with its in-house research and development capabilities and (iv) to leverage
its resources through corporate partnerships in order to minimize the cost to
the Company of late-stage clinical trials and to accelerate effective product
commercialization.  All of the Company's product candidates are in the
development stage and require further research, development, testing and
regulatory clearances.

The Company was organized in September 1991 as a Delaware Corporation and from
inception through December 1995 was in the development stage.  In December
1995, the Company and Bristol-Myers Squibb Company ("Bristol-Myers Squibb")
entered into a collaboration to develop and commercialize certain
antiangiogenesis therapeutics (see Note 5).  The Company received 95%, 100% and
50% of its revenues from Bristol-Myers  Squibb in 1997, 1996 and 1995,
respectively, and expects this concentration to continue in future years.

The accompanying consolidated financial statements include the accounts of the
Company's 85% owned subsidiary, Cytokine Sciences, Inc.  Cytokine was formed in
June 1996 for the purpose of acquiring the assets of Innovative Therapeutics,
Inc. in





                                                                             F-6
<PAGE>   51
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION (CONTINUED)

July 1996 in exchange for 15% of the common stock of Cytokine valued at
approximately $44,000.  All intercompany balances and transactions have been
eliminated in consolidation.  Minority interest expense of $18,358 and $24 is
included in general and administrative expenses for the years ended December
31, 1997 and 1996, respectively.

RESEARCH AND DEVELOPMENT

Research and development expenses consist of independent proprietary research
and development costs, the costs associated with work performed under
collaborative research agreements and the Company's sponsored funding of
research programs performed by others.  Research and development costs are
expensed as incurred.

PATENT COSTS

Costs incurred in filing, prosecuting and maintaining patents are expensed as
incurred.  Such costs aggregated approximately $409,000, $565,000 and $454,000
in 1997, 1996 and 1995, respectively.

INVESTMENTS

The Company invests in various debt securities.  These investments are
accounted for in accordance with Statement of Financial Accounting Standards
No. 115, Accounting for Certain Investments in Debt and Equity Securities,
which requires certain debt securities to be reported at amortized cost,
certain debt and equity securities to be reported at market with current
recognition of unrealized gains and losses, and certain debt and equity
securities to be reported at market with unrealized gains and losses as a
separate component of stockholders' equity.

Management determines the appropriate classification of investments as
held-to-maturity or available-for-sale at the time of purchase and re-evaluates
such designation as of each balance sheet date.  The Company has classified all
investments as available-for-sale.  Available-for-sale securities are carried
at fair value, with the unrealized gains and





                                                                             F-7
<PAGE>   52
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

INVESTMENTS (CONTINUED)

losses, net of tax, reported in stockholders' equity.  The amortized cost of
debt securities in this category is adjusted for the amortization of premiums
and accretion of discounts to maturity.  Such amortization is included as
investment income.  Realized gains and losses and declines in value judged to
be other-than-temporary on the available-for-sale securities are included in
investment income.  The cost of securities sold is based on the specific
identification method.  Interest and dividends on securities classified as
available-for-sale are included in investment income.

FURNITURE AND EQUIPMENT

Furniture and equipment are stated at cost and are depreciated over their
expected useful lives.  Depreciation is provided on a straight-line basis.
Amortization associated with capitalized leases is included in depreciation
expense.  Furniture and equipment are summarized as follows:

<TABLE>
<CAPTION>
                                                               DECEMBER 31
                                                          1997              1996
                                                      ------------------------------
 <S>                                                    <C>              <C>
 Furniture and equipment                                $2,211,263       $1,200,373
 Less:  accumulated depreciation                          (712,482)        (375,814)
                                                      ------------------------------
                                                        $1,498,781       $  824,559
                                                      ==============================
</TABLE>


CASH EQUIVALENTS

Cash equivalents include cash and short-term investments with original
maturities of less than 90 days.

INCOME TAXES

Income taxes have been provided using the liability method in accordance with
Statement of Financial Accounting Standards No. 109, Accounting for Income
Taxes.





                                                                             F-8
<PAGE>   53
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

REVENUE RECOGNITION

Revenue from the collaborative research and development agreement is recorded
when earned as defined under the terms of the agreement.  Nonrefundable fees
received upon contract signing are recorded as deferred revenue and recognized
over the term of the agreement mentioned in Note 5.  Revenues related to grants
received for specific project proposals are recognized in revenue as earned in
accordance with specified provisions, including performance requirements, in
the contracts.  Other periodic research funding payments received which are
related to future performance are deferred and recognized as income when
earned.

NET LOSS PER SHARE

In 1997, the Financial Accounting Standards Board issued Statement No. 128,
Earnings per Share ("SFAS 128").  SFAS 128 replaced the calculation of primary
and fully diluted earnings per share with basic and diluted earnings per share.
Unlike primary earnings per share, basic earnings per share excludes any
dilutive effect of options, warrants and convertible securities.  Diluted
earnings per share is very similar to the previously reported fully diluted
earnings per share.  All earnings per share amounts for all periods have been
presented, and where appropriate, restated to conform to the SFAS 128
requirements.

Pro forma net loss per common share is calculated using the weighted average
number of common and common equivalent shares outstanding during 1996 and 1995
assuming the conversion of the convertible preferred stock at the beginning of
each respective period.  Net loss per share is based on the weighted average
number of common shares outstanding.

STOCK BASED COMPENSATION

Statement of Financial Accounting Standards No. 123, Accounting for Stock Based
Compensation ("SFAS 123") sets forth accounting and reporting standards for
stock based employee compensation plans (see Note 9).  As permitted by SFAS
123, the Company continues to account for stock option grants in accordance
with APB Opinion





                                                                             F-9
<PAGE>   54
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

STOCK BASED COMPENSATION (CONTINUED)

No. 25, Accounting for Stock Issued to Employees, and related interpretations.
Under APB No. 25, no compensation expense is recognized for stock or stock
options issued to employees at fair market value.  Accordingly, adoption of
SFAS 123 has not affected the Company's results of operations or financial
position.

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 amounts reported in the financial statements and accompanying
notes.  Actual results inevitably will differ from those estimates, and such
differences may be material to the financial statements.

IMPACT OF RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS

In June 1997, the Financial Accounting Standards Board ("FASB") issued
Statement No. 130, Reporting Comprehensive Income ("Statement 130").  Statement
130 establishes new standards for the reporting and display of comprehensive
income and its components in a full set of general purpose financial
statements.  These new standards require that all items recognized as
components of comprehensive income be reported in a financial statement that is
displayed with the same prominence as other financial statements.  Statement
130 is effective for fiscal years beginning after December 15, 1997.  The
adoption of Statement 130 will not impact the Company's consolidated financial
statements.

In June 1997, the FASB issued Statement 131, Disclosures About Segments of an
Enterprise and Related Information ("Statement 131").  Statement 131 changes
the way public companies report segment information in annual financial
statements and also requires those companies to report selected segment
information in interim financial reports.  Statement 131 is effective for
periods beginning after December 15, 1997.  The adoption of Statement 131 will
not have a significant impact on the Company's consolidated financial
statements.





                                                                            F-10
<PAGE>   55
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

RELATED PARTY TRANSACTIONS

During 1995, the Company borrowed approximately $510,000 from related parties,
of which $162,916 was borrowed from a director of the Company, and issued to
such lenders notes payable at 9% interest.  Upon receipt of proceeds from a
collaborative research and development agreement mentioned in Note 5, the
Company paid the notes and accrued interest.

The Company receives legal services from a law firm in which a Company director
is a partner.  The cost of these services was negotiated on an arms length
basis and amounted to $160,000 and $406,000 for the years ended December 31,
1997 and 1996, respectively.

As of December 31, 1997 and 1996, the Company maintained approximately 87% and
88%, respectively, of its cash, cash equivalents and short-term investments
under the management of a registered investment advisory firm for which a
Company director serves as chairman of the board.  Such assets under management
are maintained by a high quality, third party financial institution custodian.

The Company has an agreement with one of its directors under which the director
provides consulting services.  During 1997, the Company paid $180,000 under
this agreement.

3. INVESTMENTS

All of the Company's investments are classified as available-for-sale and are
summarized as follows:

<TABLE>
<CAPTION>
                                                     AVAILABLE-FOR-SALE SECURITIES
                                  --------------------------------------------------------------
                                                       GROSS           GROSS         ESTIMATED
                                      AMORTIZED      UNREALIZED     UNREALIZED         FAIR
                                        COST           GAINS          LOSSES           VALUE
                                  --------------------------------------------------------------
 <S>                               <C>              <C>           <C>             <C>
 DECEMBER 31, 1997
 U.S. Treasury securities          $23,012,580      $     -       $      -        $23,012,580
 U.S. corporate securities           4,000,000                                      4,000,000
                                  --------------------------------------------------------------
 Total securities                  $27,012,580      $     -       $      -        $27,012,580
                                  ==============================================================
</TABLE>





                                                                            F-11
<PAGE>   56
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

3. INVESTMENTS (CONTINUED)

<TABLE>
<CAPTION>
                                                     AVAILABLE-FOR-SALE SECURITIES
                                 ----------------------------------------------------------------
                                                       GROSS           GROSS         ESTIMATED
                                      AMORTIZED      UNREALIZED     UNREALIZED         FAIR
                                        COST           GAINS          LOSSES           VALUE
                                 ----------------------------------------------------------------
 <S>                               <C>              <C>           <C>             <C>
 DECEMBER 31, 1996
 U.S. Treasury securities          $14,751,966      $     -       $      -        $14,751,966
 U.S. corporate securities           4,917,657            -              -          4,917,657
                                 ----------------------------------------------------------------
 Total securities                  $19,669,623      $     -       $      -        $19,669,623
                                 ================================================================
</TABLE>

The Company had no realized gains or losses from the sale of short-term
investments for the years ended December 31, 1997 and 1996.  All U.S. Treasury
and U.S. corporate securities have maturity dates of less than one year as of
December 31, 1997 and 1996.

4. SPONSORED RESEARCH PROGRAM AGREEMENTS

The Company has entered into several agreements to sponsor external research
programs.  The Company's primary external research program agreement was
entered into in September 1993 with the Children's Hospital in Boston,
Massachusetts, an entity affiliated with Harvard Medical School ("Children's
Hospital").  Under this sponsored research agreement, the Company agreed to pay
Children's Hospital $11,000,000 to support research on the role of angiogenesis
in pathological conditions.  In accordance with the terms of this sponsored
research agreement, $8,000,000 has been paid as of December  31, 1997,
$1,000,000 is due on April 1, 1998 and the remainder is due in equal
semi-annual payments until April 1, 1999.  This sponsored research agreement
gives the Company an exclusive option to negotiate an exclusive, worldwide,
royalty-bearing license for any technology resulting from the research at
Children's Hospital in areas covered by the agreement.  Amounts due under the
sponsored research agreement with Children's Hospital, which is cancelable by
the Company upon six months' notice, are paid in advance every six months and
are expensed as incurred as research and development costs.  As of December 31,
1997, the Company's total commitments for external research programs are as
follows:

<TABLE>
 <S>                                             <C>
 1998                                             $2,830,000
 1999                                              1,271,000
                                                 -----------
 Total commitments                                $4,101,000
                                                 ===========
</TABLE>





                                                                            F-12
<PAGE>   57
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

5. COLLABORATIVE RESEARCH AND DEVELOPMENT AGREEMENT

In December 1995, the Company and Bristol-Myers Squibb entered into a
collaboration to develop and commercialize certain antiangiogenesis
therapeutics ("BMS Collaboration").  The BMS Collaboration provides for
Bristol-Myers Squibb to fund the Company's research, provide milestone payments
to the Company, and pay the Company royalties on net sales of any products
developed under the BMS Collaboration.  In return, the Company granted
Bristol-Myers Squibb exclusive worldwide rights, held by the Company, to
antiangiogenic applications of thalidomide, thalidomide analogs and the
Angiostatin(TM) protein.  In August 1997, the Company reacquired the commercial
rights to thalidomide in exchange for renewing Bristol-Myers Squibb's warrant
to purchase an additional $10,000,000 of the Company's common stock as
described below.  Bristol-Myers Squibb continues to hold the rights to
thalidomide analogs.

Bristol-Myers Squibb is obligated under the BMS Collaboration to fund $18.35
million over five years for costs to be incurred by the Company related to
specified research and development.  The Company may receive an additional $32
million if the Company attains certain late-stage clinical development and
regulatory filing milestones under the BMS Collaboration, a portion of which
will be credited against royalties.  In addition to this funding, Bristol-Myers
Squibb has reimbursed the Company $730,000 for clinical studies and
ophthalmological trials.  Bristol-Myers Squibb may terminate the BMS
Collaboration for any reason with six months notice, in which event
Bristol-Myers Squibb would have no further funding obligation to the Company.
In the event Bristol-Myers Squibb were to terminate the BMS Collaboration or
otherwise fail to conduct its collaborative activities successfully and in a
timely manner, the preclinical and clinical development or commercialization of
the Company's licensed antiangiogenesis product candidates might be delayed or
terminated.

The Company received a non-refundable, non-creditable licensing fee of $1
million in 1995 under the BMS Collaboration and an additional $2.5 million on
March 31, 1996 in recognition of certain research and development efforts of
the Company.  These amounts were recorded as deferred revenue and are being
recognized over five years, the initial term of the BMS Collaboration
agreement.





                                                                            F-13
<PAGE>   58
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

5. COLLABORATIVE RESEARCH AND DEVELOPMENT AGREEMENT (CONTINUED)

Concurrent with the signing of the BMS Collaboration, the Company issued
Bristol-Myers Squibb 541,666 shares of common stock for aggregate cash proceeds
of $6,500,000. Bristol-Myers Squibb also purchased 333,333 shares of additional
common stock of the Company at the initial public offering price of $15 per
share, or a total of $5,000,000, at the time the Company completed its initial
public offering in June 1996 and was granted the right to purchase an
additional $10,000,000 of the Company's common stock at $22.50 per share, or
444,444 shares from the Company at any time up to June 19, 1997.  This warrant
was renewed and expired in November 1997.

During 1997, 1996 and 1995, the Company recognized approximately $4,542,000,
$4,625,000 and $347,000 in revenue, respectively, and incurred costs of
approximately $5,200,000, $4,000,000 and $500,000 related to the BMS
Collaboration.

6. SALE-LEASEBACK AGREEMENT

During 1995, the Company entered into a sale-leaseback agreement which is
accounted for as a capital lease.  The lessor agreed to purchase the Company's
equipment and also assumed and exercised the Company's purchase option on other
leased equipment.  The Company agreed to lease-back the equipment over an
initial term of two years with annual renewal options in years three and four.
The Company had the option to purchase the equipment at fair market value at
the end of years two and three.  In connection with this agreement, the Company
granted the lessor warrants for 33,334 shares of common stock at an exercise
price of $6.38 per share.

During 1997, the Company exercised its purchase option and paid approximately
$263,000 for such equipment.





                                                                            F-14
<PAGE>   59
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

7. INCOME TAXES

The Company has net operating loss carryforwards of approximately $30,224,000
and $22,150,000 at December 31, 1997 and 1996, respectively, for income tax
purposes that expire in years 2006 through 2012.  The Company also has research
and development tax credit carryforwards of approximately $1,719,000 and
$1,330,000 as of December 31, 1997 and 1996, respectively, that expire in years
2007 through 2012.  The utilization of the net operating loss and research and
development carryforwards may be limited in future years due to changes in
ownership of the Company pursuant to Internal Revenue Code Section 382.  For
financial reporting purposes, a valuation allowance has been recognized to
reduce the net deferred tax assets to zero due to uncertainties with respect to
the Company's ability to generate taxable income in the future sufficient to
realize the benefit of deferred income tax assets.

Deferred income taxes reflect the net effect of temporary differences between
the carrying amounts of assets and liabilities for financial reporting purposes
and the amounts used for income tax purposes.  Significant components of the
Company's deferred income tax assets and liabilities as of December 31, 1997
and 1996 are as follows:

<TABLE>
<CAPTION>
                                                                  1997                 1996
                                                            -------------------------------------
 <S>                                                        <C>                 <C>
 Deferred income tax assets (liabilities):
   Research and development credit carryforward             $     1,719,000     $      1,330,000
   Net operating loss carryforwards                              11,485,000            8,146,000
   Deferred revenues                                                918,000            1,073,000
   Other                                                            529,000              371,000
   Depreciation                                                      (4,000)             (17,000)
   Valuation allowance for deferred income tax assets
                                                                (14,647,000)         (10,903,000)
                                                            -------------------------------------
 Net deferred income tax assets                             $             -     $              -
                                                            =====================================
</TABLE>





                                                                            F-15
<PAGE>   60
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

7. INCOME TAXES (CONTINUED)

A reconciliation of the provision for income taxes to the federal statutory
rate is as follows:

<TABLE>
<CAPTION>
                                              1997                1996               1995
                                           -----------------------------------------------------
 <S>                                        <C>                 <C>                <C>
 Tax benefit at statutory rate              $(2,484,000)        $(1,813,000)       $(2,621,000)
 Tax credits                                   (389,000)            (90,000)          (120,000)
 Non-qualified stock options                   (883,000)                  -                  -
 Other                                           12,000              12,000             11,000
 Valuation allowance                          3,744,000           1,891,000          2,730,000
                                           -----------------------------------------------------
                                            $         -         $         -        $         -
                                           =====================================================
</TABLE>

8. CONVERTIBLE PREFERRED STOCK

The preferred stock had certain preferential rights in the event of liquidation
or dissolution of the Company but did not have any preferences in regard to
voting rights or dividend distributions.  The preferred stock was automatically
converted into the Company's common stock upon the effective date of the
Company's initial public offering of the Company's common stock.

9. STOCK OPTIONS AND WARRANTS

In 1992 and 1996, the Company adopted incentive and nonqualified stock option
plans whereby 1,750,000 shares of the Company's common stock were reserved for
grants to various executive, scientific and administrative personnel of the
Company as well as outside directors and consultants, of which 155,859 shares
remain available for grant as of December 31, 1997. These options vest over
periods varying from vesting immediately through vesting over four years and
generally expire 10 years from the date of grant.





                                                                            F-16
<PAGE>   61
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

9. STOCK OPTIONS AND WARRANTS (CONTINUED)

Pro forma information regarding net income and loss per share is required by
SFAS 123, and has been determined as if the Company had accounted for its
employee stock options under the fair value method subsequent to December 31,
1994. Because FASB Statement No. 123 is applicable only to options granted
subsequent to December 31, 1994, its pro forma effect will not be fully
reflected until 1999.  The fair value for these options was estimated at the
date of grant using a Black-Scholes option pricing model with the following
weighted-average assumptions for 1997, 1996 and 1995, respectively: risk-free
interest rates of 5.97%, 6.36% and 5.96%; no dividend yields; volatility
factors of the expected market price of the Company's common stock of 0.80,
0.65 and 0.65; and a weighted-average expected life of an option of 7 years.

The Black-Scholes option valuation model was developed for use in estimating
the fair value of traded options which have no vesting restrictions and are
fully transferable. In addition, option valuation models require the input of
highly subjective assumptions including the expected stock price volatility.
Because the Company's employee stock options have characteristics significantly
different from those of traded options, and because changes in the subjective
input assumptions can materially affect the fair value estimate, in
management's opinion, the existing models do not necessarily provide a reliable
single measure of the fair value of its employee stock options.

For purposes of pro forma disclosures, the estimated fair value of the options
and warrants granted to employees are amortized to expense over the vesting
period.  The weighted average fair value per option granted in 1997, 1996 and
1995 was $7.90, $9.73 and $4.62, respectively.  The weighted average fair value
per warrant granted to employees during 1997 and 1995 was $13.00 and $4.38,
respectively.  The Company's pro forma information follows:

<TABLE>
<CAPTION>
                                         1997                   1996                       1995
                                ------------------------------------------------------------------
 <S>                             <C>                       <C>                       <C>
 Pro forma net loss              $(9,493,464)              $(6,965,172)              $(8,758,895)
 Pro forma loss per share        $     (0.78)              $     (0.71)              $     (1.20)
</TABLE>





                                                                            F-17
<PAGE>   62
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

9. STOCK OPTIONS AND WARRANTS (CONTINUED)

A summary of the Company's stock options and warrants granted to employees, and
related information for the years ended December 31 follows:

<TABLE>
<CAPTION>
                                                      NUMBER OF      EXERCISE PRICE
                                                       OPTIONS         PER SHARE
                                                   ---------------------------------
 <S>                                                  <C>            <C>
 Outstanding at January 1, 1995                       1,170,689      $1.50 - $6.38
   Exercised                                            (42,663)         $1.50
   Granted                                              436,343      $6.00 - $12.00
                                                   -------------
 Outstanding at December 31, 1995                     1,564,369      $1.50 - $12.00
   Exercised                                            (99,677)     $1.50 - $6.38
   Granted                                           1,188,364       $9.00 - $16.25
   Cancelled                                           (73,112)          $6.38
                                                   -------------
 Outstanding at December 31, 1996                     2,579,944      $1.50 - $16.25
   Exercised                                           (235,836)     $1.50 - $9.00
   Granted                                             761,575       $ 9.38 - $15.00
   Cancelled                                            (5,734)          $14.00
                                                   -------------
 Outstanding at December 31, 1997                     3,099,949      $1.50 - $16.25
                                                   =============
 Exercisable at December 31, 1997                     2,182,061      $1.50 - $16.25
                                                   =============
</TABLE>


The following summarizes information about stock options and warrants granted
to employees outstanding at December 31, 1997:

<TABLE>
<CAPTION>
                                      OPTIONS OUTSTANDING                          OPTIONS EXERCISABLE
                     ------------------------------------------------      -------------------------------
                                          WEIGHTED
                                           AVERAGE           WEIGHTED                            WEIGHTED
                         NUMBER           REMAINING           AVERAGE             NUMBER          AVERAGE
     RANGE OF          OUTSTANDING       CONTRACTUAL         EXERCISE          EXERCISABLE       EXERCISE
  EXERCISE PRICES      AT 12/31/97      LIFE IN YEARS          PRICE           AT 12/31/97         PRICE
- -------------------  --------------  ------------------  ----------------   -----------------  --------------
    <S>                 <C>                 <C>               <C>                  <C>             <C>
      $1.50               637,184           4.7               $ 1.50               630,505         $ 1.50
    $6 - $6.375         1,062,537           7.5               $ 6.31               899,419         $ 6.30
    $9 - $16.25         1,400,228           9.3               $12.05               652,137         $12.89
                     --------------                                         -----------------       
                        3,099,949           7.8               $ 7.92             2,182,061         $ 6.88
                     ==============                                         =================
</TABLE>





                                                                            F-18
<PAGE>   63
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

9. STOCK OPTIONS AND WARRANTS (CONTINUED)

The Company also granted 50,000 and 83,334 options to purchase common stock at
$6.38 and $6.00 per share during 1995 and 1993, respectively, to Children's
Hospital in connection with a sponsored research agreement (see Note 4).  These
options are not covered by the incentive and nonqualified stock option plan and
are included in the table below.

The Company also has granted warrants to consultants and certain third parties.
Warrants granted generally expire after 10 years from the date of grant.  Stock
warrant activity to non-employees is as follows:

<TABLE>
<CAPTION>
                                                     NUMBER OF       EXERCISE PRICE PER
                                                      WARRANTS              SHARE
                                                   --------------------------------------
 <S>                                                    <C>          <C>
 Outstanding at January 1, 1995                         127,982      $6.00 - $7.65
   Granted                                              139,354          $6.38
                                                   --------------
 Outstanding at December 31, 1995                       267,336      $6.00 - $7.65
   Granted                                               10,000          $14.00
                                                   --------------
 Outstanding at December 31, 1996                       277,336      $6.00 - $14.00
   Granted                                              100,000          $13.00
   Exercised                                             (8,334)          $6.00
                                                   --------------
 Outstanding at December 31, 1997                       369,002      $1.50 - $14.00
                                                   ==============
 Exercisable at December 31, 1997                       332,335      $1.50 - $13.00
                                                   ==============
</TABLE>


The Company also granted warrants to Bristol-Myers Squibb in connection with
the BMS Collaboration described in Note 5 and which expired in November 1997.

10. FINANCIAL INSTRUMENTS

Financial instruments that potentially subject the Company to significant
concentrations of credit risk consist principally of cash and cash equivalents,
short-term investments and account receivable.  As of December 31, 1997 and
1996, the Company maintained approximately 87% and 88%, respectively, of its
cash, cash equivalents and short-term investments (short-duration, high quality
debt securities) under the management of a registered investment advisory firm
for which a Company director serves as chairman of the board.  Such assets
under management are maintained by a high credit quality, third party financial
institution custodian.





                                                                            F-19
<PAGE>   64
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

10. FINANCIAL INSTRUMENTS (CONTINUED)

The carrying amounts reported in the balance sheet for cash and cash
equivalents, short-term investments, account receivable and accounts payable
approximate their fair values.

11. COMMITMENTS AND CONTINGENCIES

The Company is a defendant in a lawsuit initiated in August 1995 in the United
States District Court for the Eastern District of Tennessee by Bolling, McCool
& Twist ("BMT"), a consulting firm.  In the suit, BMT asserts that the Company
breached an agreement between BMT and the Company by failing to pay BMT certain
fees it asserts are owed under the agreement.  More specifically, BMT has
asserted a claim for the payment of services rendered in the approximate amount
of $50,000 and seeks a success fee in an unspecified amount in connection with
the BMS Collaboration.  The judge in the case bifurcated the proceeding into
two phases: an adjudication of whether the Company breached its agreement with
BMT and then a damage phase.  After a trial on the merits the jury found in
favor of BMT on the breach of contract claim.  However the damage phase of the
trial has not been completed.  Despite the jury verdict on the breach of
contract claim, the Company is unable to predict with certainty the eventual
outcome of the lawsuit.  The Company intends to continue to contest the action
vigorously and believes that this proceeding will not have a material adverse
effect on the Company or its financial statements, although there can be no
assurance this will be the case.

In May 1994, the Company entered into two license agreements, whereby the
Company acquired the exclusive, worldwide, royalty-bearing licenses to make,
use, and sell AngiostatinTM, thalidomide (see Note 5) and thalidomide analogs,
all inhibitors of angiogenesis developed by Children's Hospital.  In
consideration for receiving the rights, the Company must pay a royalty on any
sublicensing fees, as defined in the agreements, to Children's Hospital.  The
Company is also required to pay certain amounts upon the attainment of certain
milestones.  The milestone payments aggregate $2,650,000, of which $290,000 has
been paid to date, and are based upon license fees and achievement of
regulatory approvals.





                                                                            F-20
<PAGE>   65
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

11. COMMITMENTS AND CONTINGENCIES (CONTINUED)

In addition, in 1996, the Company entered into two license agreements with
Children's Hospital for the exclusive, worldwide, royalty-bearing licenses to
make, use and sell Endostatin(TM) and 2-Methoxyestradiol, both inhibitors of
angiogenesis.  In consideration for receiving the rights, the Company must pay
a royalty on any sublicensing fees, as defined in the agreements, to Children's
Hospital.  Each agreement obligates the Company to pay up to $1,000,000 "upon
the attainment of certain milestones."  As of December 31, 1997, no payments
were due under these agreements.

These license agreements require the Company to pay Children's Hospital a
specified percentage of the royalty income received on the first $100 million
in net sales of the licensed products, and an increased percentage thereafter,
with a minimum payment based on a percentage of net sales of the licensed
products by any sublicensees.

The Company leases its primary facilities through March 31, 2003.  The lease
agreement provides for escalation of the lease payments over the term of the
lease, however, rent expense is recognized under the straight-line method.
Additionally, the Company leases office equipment under an operating lease.
The future minimum payments under its facilities and equipment leases as of
December 31, 1997 are as follows:

<TABLE>
 <S>                                           <C>
 1998                                          $     237,800
 1999                                                243,900
 2000                                                250,200
 2001                                                256,700
 Thereafter                                          238,200
                                               --------------
 Total minimum payments                        $   1,226,800
                                               ==============
</TABLE>

Rental expense for the years ended December 31, 1997, 1996 and 1995 was
$241,000, $226,000 and $210,000, respectively.

12. EMPLOYEE RETIREMENT PLAN

The Company sponsors the EntreMed, Inc. 401(k) Plan and Trust.  The plan covers
substantially all employees and enables participants to contribute a portion of
salary and wages on a tax-deferred basis.





                                                                            F-21
<PAGE>   66
                                 EntreMed, Inc.

             Notes to Consolidated Financial Statements (continued)

13. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

Summarized quarterly financial information for the years ended December 31,
1997 and 1996 is as follows:

<TABLE>
<CAPTION>
                                                                   QUARTER ENDED
                                          MARCH 31          JUNE 30           SEPTEMBER 30          DECEMBER 31
                                      -----------------------------------------------------------------------------
<S>                                     <C>              <C>                   <C>                 <C>
1997
Revenues                                $  1,092,500     $  1,092,500          $   1,241,040       $    1,331,448
Research and development costs             2,418,835        1,743,560              2,825,840            2,010,470
General and administrative expenses          749,660        1,219,501                882,078            2,064,485
Net loss                                  (1,423,507)      (1,180,443)            (1,820,963)          (2,111,816)
Net loss per share                      $      (0.12)    $      (0.10)         $       (0.15)      $        (0.17)

1996
Revenues                                $  1,092,500     $  1,092,500          $   1,092,500       $    1,347,500
Research and development costs             2,063,270        1,246,045              2,429,696            1,814,782
General and administrative expenses          771,411          472,224                721,022            1,470,844
Net loss                                  (1,675,407)        (464,938)            (1,379,087)          (1,250,400)
Net loss per share                      $      (0.23)    $      (0.06)         $       (0.11)      $        (0.10)
</TABLE>





                                                                            F-22
<PAGE>   67
                                   SIGNATURES

      Pursuant to the requirements of the 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.

                          ENTREMED, INC.

                  By:     /s/ John W. Holday, Ph.D.                      
                          -----------------------------------------------
                          John W. Holaday, Ph.D., Chairman of the
                          Board, President and Chief Executive Officer


                               POWER OF ATTORNEY

      The Registrant and each person whose signature appears below hereby
appoint John W. Holaday, Ph.D. as attorney-in-fact with full power of
substitution, severally, to execute in the name and on behalf of the Registrant
and each such person, individually and in each capacity stated below, one or
more amendments to the annual report which amendments may make such changes in
the report at the attorney-in-fact acting in the premises deems appropriate and
to file any such amendment to the report with the Securities and Exchange
Commission.

                                   SIGNATURE

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

<TABLE>
<CAPTION>
        SIGNATURE                                        TITLE                                  DATE
        ---------                                        -----                                  ----
<S>                                                                                           <C>
/s/ John W. Holaday, Ph. D.                    Chairman of the Board and                      3/31/98
- ---------------------------                     Chief Executive Officer                              
John W. Holaday, Ph. D.                      (principal executive officer)
                                                                          

/s/ R. Nelson Campbell                          Chief Financial Officer                       3/31/98
- ----------------------                         (principal financial and
R. Nelson Campbell                                accounting officer)  
                                                                       

/s/ John C. Thomas, Jr.                          Secretary/Treasurer                          3/31/98
- -----------------------                                               
John C. Thomas, Jr.


/s/ Donald S. Brooks                                  Director                                3/31/98
- --------------------------                                                                           
Donald S. Brooks
</TABLE>





                                      II-1
<PAGE>   68
<TABLE>
<S>                                                   <C>                                     <C>
/s/Samuel R. Dunlap, Jr.                              Director                                3/31/98
- ------------------------                                                                             
Samuel R. Dunlap, Jr.


/s/Mark C. M. Randall                                 Director                                3/31/98
- ---------------------                                                                                
Mark C. M. Randall


/s/Lee F. Meier                                       Director                                3/31/98
- ---------------                                                                                      
Lee F. Meier


/s/Wendell M. Starke                                  Director                                3/31/98
- --------------------                                                                                 
Wendell M. Starke
</TABLE>





                                      II-2

<PAGE>   1
EntreMed, Inc.
Exhibit 3.1(a)


                            CERTIFICATE OF AMENDMENT

                                       OF

               AMENDED AND RESTATED CERTIFICATE OF INCORPORATION


                 ENTREMED, INC., a corporation organized and existing under the
General Corporation Law of the State of Delaware (the "Corporation"), DOES
HEREBY CERTIFY AS FOLLOWS:

FIRST:           The Board of Directors of the Corporation duly adopted
                 resolutions in accordance with Section 242 of the General
                 Corporation Law of the State of Delaware proposing, declaring
                 advisable and recommending amendments to the Amended and
                 Restated Certificate of Incorporation of the Corporation.  The
                 amendments are as follows:

         The following shall be added as the first paragraph under Article VI
of the Amended and Restated Certificate of Incorporation:

                 "Terms of Directors.  The number of Directors of the
Corporation shall be fixed by resolution duly adopted from time to time by the
Board of Directors.  The Directors shall be classified, with respect to the
term for which they hold office, into three classes, as nearly equal in number
as possible.  The initial Class I Director shall serve for a term expiring at
the annual meeting of stockholders to be held in 1998, the initial Class II
Directors shall serve for a term expiring at the annual meeting of stockholders
to be held in 1999, and the initial Class III Directors shall serve for a term
expiring at the annual meeting of stockholders to be held in 2000.  At each
annual meeting of stockholders, the successor or successors of the class of
Directors whose term expires at that meeting and shall be elected by a
plurality of the votes cast at such meeting shall hold office for a term
expiring at the annual meeting of stockholders held in the third year following
the year of their election.  The Directors elected to each class shall hold
office until their successors are duly elected and qualified or until their
earlier resignation or removal."

                 The following shall be added as the second paragraph under
Article VI of the Amended and Restated Certificate of Incorporation:

                 "Vacancies.  Any and all vacancies in the Board of Directors,
however occurring, including, without limitation, by reason of an increase in
size of the Board of Directors, or the death, resignation, disqualification or
removal of a Director, shall be filled solely by the affirmative vote of a
majority of the remaining Directors then in
<PAGE>   2
office, even if less than a quorum of the Board of Directors.  Any Director
appointed in accordance with the preceding sentence shall hold office until the
annual meeting of stockholders at which the class of directors for which he or
she has been chosen is elected and until such Director's successor shall have
been duly elected and qualified or until his or her earlier resignation or
removal.  When the number of Directors is increased or decreased, the Board of
Directors shall determine the class or classes to which the increased or
decreased number of Directors shall be apportioned so as to maintain each class
as nearly equal in number as possible; provided, however, that no decrease in
the number of Directors shall shorten the term of any incumbent Director."

SECOND:          That the annual meeting of the stockholders of the Corporation
                 was duly called and held upon notice in accordance with
                 Section 222 of the General Corporation Law of the State of
                 Delaware at which meeting the necessary number of shares was
                 voted in favor of said amendments.

THIRD:           The aforesaid amendments were duly adopted in accordance with
                 the applicable provisions of Section 242 of the General
                 Corporation Law of the State of Delaware.

FOURTH:          This certificate of amendment to the Amended and Restated
                 Certificate of Incorporation is to become effective upon
                 filing.

        IN WITNESS WHEREOF, the undersigned, ENTREMED, INC., has caused this
Certificate of Amendment to its Amended and Restated Certificate of
Incorporation to be executed on its behalf by President and attested to by its
Secretary as of this 31st day of July, 1997.

                                      ENTREMED, INC.               
                                                                   
                                                                   
                                                                   
                                      By: /s/ John W. Holaday, PhD.
                                          -------------------------
                                      Name:   John W. Holaday, PhD.
                                      Title:  President            


Attest: /s/ John C. Thomas, Jr.
        -----------------------
        John C. Thomas, Jr.
        Secretary

<PAGE>   1
EntreMed, Inc.
Exhibit 10.26



                                                       August 5, 1997


EntreMed, Inc.
9610 Medical Center Drive, Suite 200
Rockville, Maryland  20850

     Re:  Termination of Collaborative
          Research and License Agreement
          With Respect to Thalidomide Products

Dear Dr. Holaday:

     The purpose of this letter is to set forth the terms and conditions upon
which Bristol-Myers Squibb Company ("BMS") and EntreMed, Inc.  ("ENTREMED")
will terminate, solely with respect to Thalidomide Products (as defined
herein), that certain Research Collaboration and License Agreement (the
"Agreement") between BMS and ENTREMED, dated as of December 7, 1995, as
amended, and modify other provisions of the Agreement, by amendment to the
Agreement pursuant to Section 16.2 thereof.

     1.   Termination of Rights and Obligations With Respect to Thalidomide 
          Products.

          1.1  Generally.  Effective as of the date hereof, except as provided
in paragraph 1.2 of this letter, all of BMS's rights and obligations under the
Agreement, and all of ENTREMED's obligations under the Agreement, if any,
solely with respect to Thalidomide or any article, composition, apparatus,
material, method, process or service which is or includes Thalidomide or any
product developed or derived therefrom (each  (including Thalidomide), a
"Thalidomide Product"), but not with respect to any analogs of Thalidomide or
any product developed or derived from any such analog, shall terminate;
provided, however, that all of the parties' rights and obligations under the
Agreement with respect to any other compound or PRODUCT shall continue.  By way
of amplification of the preceding sentence, on and after the date hereof: 

               (i)  the definition in Section 1.18 of the Agreement of "NCE
PRODUCTS" shall exclude all Thalidomide Products;

               (ii) BMS's right and license under Section 2.1 of the Agreement
shall not include the right to make, have made, use or sell any thalidomide
Product;

              (iii) BMS shall cease to have any research, development,
registration, marketing or sales obligations under Section 4.1 of the Agreement
with respect to any Thalidomide Product;    
<PAGE>   2
EntreMed, Inc.
August 5, 1997
Page 2


               (iv) pursuant to Section 4.2 of the Agreement, (i) all PATENT
RIGHTS and licenses and rights with respect to Thalidomide Products shall
revert to ENTREMED, and (ii) BMS hereby grants ENTREMED and its AFFILIATES and
exclusive, royalty-free sublicensable license under the BMS patents and BMS
TECHNOLOGY solely to make, have made, use and sell Thalidomide Products;

               (v)  BMS shall have no obligation to pay royalties pursuant to
Section 9.1 of the Agreement, or to pay milestone payments under Section 9.3
thereof, with respect to any Thalidomide Products; and

               (vi) the definition in Section 7.9(c) of the Agreement of "CMCC
Products" shall exclude all Thalidomide Products.

          1.2  Survival of Confidentiality, Publication Obligations.
Notwithstanding any provision of this letter, BMS's obligations with respect to
Thalidomide Products regarding confidentiality and publication as set forth in
Section 5, 7.8, 7.9(d) and 7.9(e) of the Agreement shall not be affected by
this letter, and shall remain in full force and effect.

          1.3  R&D Plans.     Within 60 days after the date hereof, BMS and
ENTREMED, acting through the Committee, shall amend the R&D Plans in order to
make them consistent with the effect of this letter.

          1.4  Relinquishment of BMS's Rights.  As of the date hereof, BMS
hereby relinquishes to ENTREMED all of BMS's right, title and interest
(including, without limitation, under Section 7.9 of the Agreement) in the BMS
Results and the Joint Results, to the extent that such Results pertain to
Thalidomide Products.  Further, BMS acknowledges and agrees that it is not
entitled to any license under Section 15.1 of the Agreement with respect to any
Thalidomide Product.

          1.5  Discontinuation of Patent Activity and Support.  Notwithstanding
any provision of the Agreement to the contrary, as of the date hereof, BMS
shall discontinue all financial support of all patents or patent applications
pertaining to RESEARCH PATENT RIGHTS that claim solely any Thalidomide Product
and all filing, prosecution and maintenance of all patent applications and
patents outside the United States relating to INVENTIONS that related solely to
any Thalidomide Product.

          1.6  Funding Obligations.  BMS acknowledges and agrees that its
obligations to fund the RESEARCH COLLABORATION under Section 7.3(a) and (b) of
the Agreement shall not be affected by this letter.     
<PAGE>   3
EntreMed, Inc.
August 5, 1997
Page 3

          1.7  Transfer of Scientific Information.  Promptly after the date
hereof, BMS shall deliver to ENTREMED all scientific data and information
relating to Thalidomide Products that BMS has possession of or access to, to
the extent it has the right to disclose same.

     2.   Extension of Evaluation Period.

          2.1  Extension.  In partial consideration of BMS's relinquishment of
its right with respect to Thalidomide Products, the period during which BMS may
evaluate ENDOSTATIN(TM) and 2 MOE pursuant to Section 2.3 (a)(i) of the
Agreement is hereby extended through and including November 30, 1997; provided,
however, that if BMS wishes to pursue negotiations with respect to
ENDOSTATIN(TM) and/or 2 MOE, it must present its Minimum Terms therefor to
ENTREMED not later than November 1, 1997.  Following ENTREMED's acceptance of
any such Minimum Terms, BMS and ENTREMED shall negotiate in good faith a
definitive agreement(s) incorporating such Minimum Terms by November 30, 1997.

          2.2. Continued Disclosure; Materials Transfer.  So that BMS may
exercise its rights under paragraph 2.1 of this letter in an informed manner,
commencing on the date hereof and through November 30, 1997:

               (a)  ENTREMED shall promptly provide BMS with all invention
disclosure reports and clinical or pre-clinical data, inform BMS with respect
to any discoveries or findings of Scientific significance, and provide all
other relevant scientific data or information reasonably requested by BMS, that
pertain to ENDOSTATIN(TM) or 2 MOE and that have not been provided to BMS by
ENTREMED prior to the date hereof, to the extent that ENTREMED has possession
of, or access to, such data or information and the right to disclose same; and

               (b)  ENTREMED shall provide to BMS, promptly after BMS's request
therefor, biological materials or chemical compounds relating to ENDOSTATIN(TM)
and/or 2 MOE (collectively, "Substances") to the extent that ENTREMED has
possession of, or access to, such Substances and the right to transfer same.
The Substances shall constitute confidential Information under the Agreement,
provided that (i) notwithstanding Section 5.1 of the Agreement, BMS shall be
permitted to use the Substances in determining whether to exercise its rights
under paragraph 2.1 of this letter, and (ii) Section 5.3 of the Agreement shall
not prohibit BMS from using the Substances in a manner consistent with this
paragraph 2.2.

     3.   Re-issuance of Warrant.  BMS and ENTREMED acknowledge that the
warrant (the "Previous Warrant") to purchase Common Stock of ENTREMED that
ENTREMED issued to BMS in conjunction with the
<PAGE>   4
EntreMed, Inc.
August 5, 1997
Page 4

signing of the Agreement has expired.  In partial consideration of BMS's
relinquishment of its rights with respect to Thalidomide Products, ENTREMED
shall grant BMS a new warrant (the "New Warrant") upon the same terms and
conditions as the Previous Warrant, except that the New Warrant shall be issued
as of the date hereof and expire on November 30, 1997.  ENTREMED agrees to
issue to BMS a replacement warrant certificate evidencing the New Warrant, in
the form attached as Exhibit A, upon execution of this letter by both parties.

     4.   Defined Terms.  All block capital and uppercase terms used and not
otherwise defined in this letter shall have the respective meanings assigned
thereto in the Agreement.

     5.   Extent of Amendment.  Except as expressly provided herein, the terms
and conditions of the Agreement shall not be affected hereby and shall continue
in full force and effect.

     If the terms set forth in this letter are acceptable, please sign the two
copies of this letter which are enclosed and return one of them in the envelope
provided.

                                   Sincerely yours,

                                   BRISTOL-MYERS SQUIBB COMPANY


                                   By:   /s/ CHARLES LINZNER
                                       -------------------------

                                   Name:   Charles Linzner
                                         -----------------------

                                   Title:  Vice President and
                                          ----------------------
                                             Sr. Counsel


ACCEPTED AND AGREED TO:

ENTREMED, INC.


By:   /s/ John W. Holaday, Ph.D.
    -------------------------------

Name:  John W. Holaday, Ph.D.
      -----------------------------

Title:  Chairman of the Board, President,
      -----------------------------
        and Chief Executive Officer   

<PAGE>   1
EntreMed, Inc.
Exhibit 10.27
                                 ENTREMED, INC.

                  AMENDED AND RESTATED 1996 STOCK OPTION PLAN


1.       Purpose.

         The purpose of this plan (the "Plan") is to secure for  ENTREMED, INC.
(the "Company") and its shareholders the benefits arising from capital stock
ownership by employees, officers and directors of, and consultants or advisors
to, the Company who are expected to contribute to the Company's future growth
and success.  Except where the context otherwise requires, the term "Company"
shall include all present and future subsidiaries of the Company as defined in
Sections 424(e) and 424(f) of the Internal Revenue Code of 1986, as amended or
replaced from time to time (the "Code").  Those provisions of the Plan which
make express reference to Section 422 of the Code shall apply only to Incentive
Stock Options (as that term is defined in the Plan).

2.       Type of Options and Administration.

         (a)      Types of Options.  Options granted pursuant to the Plan shall
be authorized by action of the Board of Directors of the Company (or a
committee designated by the Board of Directors) and may be either incentive
stock options ("Incentive Stock Options") meeting the requirements of Section
422 of the Code or non-statutory options which are not intended to meet the
requirements of Section 422 of the Code.

         (b)      Administration.  The Plan will be administered by a committee
(the "Committee") appointed by the Board of Directors of the Company, whose
construction and interpretation of the terms and provisions of the Plan shall
be final and conclusive.  The delegation of powers to the Committee shall be
consistent with applicable laws or regulations (including, without limitation,
applicable state law and Rule 16b-3 ("Rule 16b-3") promulgated under the
Securities Exchange Act of 1934 (the "Exchange Act"), or any successor rule).
The Committee may in its sole discretion grant options to purchase shares of
the Company's Common Stock, $.01 par value per share ("Common Stock") and issue
shares upon exercise of such options as provided in the Plan.  The Committee
shall have authority, subject to the express provisions of the Plan, to
construe the respective option agreements and the Plan, to prescribe, amend and
rescind rules and regulations relating to the Plan, to determine the terms and
provisions of the respective option agreements, which need not be identical,
and to make all other determinations in the judgment of the Committee necessary
or desirable for the administration of the Plan.  The Committee may correct any
defect or supply any omission or reconcile any inconsistency in the Plan or in
any option agreement in the manner and to the extent it shall deem expedient to
carry the Plan into effect and it shall be the sole and final judge of such
expediency.  No director or person acting pursuant to authority delegated by
the







                                    - 1 -
<PAGE>   2
Board of Directors shall be liable for any action or determination under the
Plan made in good faith.  Subject to adjustment as provided in Section 15
below, the aggregate number of shares of Common Stock that may be subject to
options granted to any person in a calendar year shall not exceed 25% of the
maximum number of shares which may be issued and sold under the Plan, as set
forth in Section 4 hereof, as such section may be amended from time to time.

         (c)      Applicability of Rule 16b-3.  Those provisions of the Plan
which make express reference to Rule 16b-3 shall apply to the Company only at
such time as the Company's Common Stock is registered under the Exchange Act,
subject to the last sentence of Section 3(b), and then only to such persons as
are required to file reports under Section 16(a) of the Exchange Act (a
"Reporting Person").

3.       Eligibility.

         (a)      General.  Options may be granted to persons who are, at the
time of grant, employees, officers or directors of, or consultants or advisors
to, the Company or any subsidiaries of the Company as defined in Sections
424(e) and 424(f) of the Code ("Participants") provided, that Incentive Stock
Options may only be granted to individuals who are employees of the Company
(within the meaning of Section 3401(c) of the Code).  A person who has been
granted an option may, if he or she is otherwise eligible, be granted
additional options if the Committee shall so determine.

         (b)      Grant of Options to Reporting Persons.  The selection of a
director or an officer who is a Reporting Person (as the terms "director" and
"officer" are defined for purposes of Rule 16b-3) as a recipient of an option,
the timing of the option grant, the exercise price of the option and the number
of shares subject to the option shall be determined in advance of the grant
either (i) by the Board of Directors or (ii) by a committee consisting of two
or more directors having full authority to act in the matter, each of whom
shall be a "non-employee director" (as hereinafter defined).  For the purposes
of the Plan, a director shall be deemed to be a "non-employee director" only if
such person qualifies as a "non-employee director" within the meaning of Rule
16b-3, as such term is interpreted from time to time.

         (c)      Directors' Options.  Commencing on the date this plan is
adopted by the Board of Directors, directors of the Company ("Eligible
Directors") will be granted an option (a "Director Option") to purchase 15,000
shares of Common Stock on the date that such person is first elected or
appointed a director ("Initial Director Option").  Commencing on the day
immediately following the date of the annual meeting of stockholders for the
Company's fiscal year ending December 31, 1996, (i) each Eligible Director will
receive an automatic grant of a Director Option to purchase 5,000 shares of
Common Stock, (ii) each member of any committee of the Board of Directors,
other than the Executive Committee, will receive an automatic grant of a
Director Option to purchase 1,000 shares of Common Stock and (iii) each member
of the Executive Committee of the Board of Directors will receive an automatic
grant of a Director Option to purchase 5,000 shares of Common Stock (each, an
"Automatic Grant") on the day





                                     - 2 -
<PAGE>   3
immediately following the date of each annual meeting of stockholders, as long
as such director is a member of the Board of Directors.  The exercise price for
each share subject to a Director Option shall be equal to the fair market value
of the Common Stock on the date of grant.  Director Options shall be
exercisable commencing on the date the option is granted and will expire the
earlier of 10 years after the date of grant, unless such Director Option is an
Incentive Stock Option in which case such Director Option shall be subject to
the additional terms and conditions set forth in Section 11.

4.       Stock Subject to Plan.

         The stock subject to options granted under the Plan shall be shares of
authorized but unissued or reacquired Common Stock.  Subject to adjustment as
provided in Section 15 below, the maximum number of shares of Common Stock of
the Company which may be issued and sold under the Plan is 1,266,667 shares.
If an option granted under the Plan shall expire, terminate or is cancelled for
any reason without having been exercised in full, the unpurchased shares
subject to such option shall again be available for subsequent option grants
under the Plan.

5.       Forms of Option Agreements.

         As a condition to the grant of an option under the Plan, each
recipient of an option shall execute an option agreement in such form not
inconsistent with the Plan as may be approved by the Board of Directors.  Such
option agreements may differ among recipients.

6.       Purchase Price.

         (a)      General.  The purchase price per share of stock deliverable
upon the exercise of an option shall be determined by the Board of Directors at
the time of grant of such option; provided, however, that in the case of an
Incentive Stock Option, the exercise price shall not be less than 100% of the
Fair Market Value (as hereinafter defined) of such stock, at the time of grant
of such option, or less than 110% of such Fair Market Value in the case of
options described in Section 11(b).  "Fair Market Value" of a share of Common
Stock of the Company as of a specified date for the purposes of the Plan shall
mean the closing price of a share of the Common Stock on the principal
securities exchange (including the Nasdaq National Market) on which such shares
are traded on the day immediately preceding the date as of which Fair Market
Value is being determined, or on the next preceding date on which such shares
are traded if no shares were traded on such immediately preceding day, or if
the shares are not traded on a securities exchange, Fair Market Value shall be
deemed to be the average of the high bid and low asked prices of the shares in
the over-the-counter market on the day immediately preceding the date as of
which Fair Market Value is being determined or on the next preceding date on
which such high bid and low asked prices were recorded.  If the shares are not
publicly traded, Fair Market Value of a share of Common Stock (including, in
the case of any repurchase of shares, any distributions with respect thereto
which would be repurchased with the shares) shall be determined in good faith
by the Board of Directors.





                                     - 3 -
<PAGE>   4
In no case shall Fair Market Value be determined with regard to restrictions
other than restrictions which, by their terms, will never lapse.

         (b)      Payment of Purchase Price.  Options granted under the Plan
may provide for the payment of the exercise price by delivery of cash or a
check to the order of the Company in an amount equal to the exercise price of
such options, or by any other means which the Board of Directors determines are
consistent with the purpose of the Plan and with applicable laws and
regulations (including, without limitation, the provisions of Rule 16b-3 and
Regulation T promulgated by the Federal Reserve Board).

7.       Option Period.

         Subject to earlier termination as provided in the Plan, each option
and all rights thereunder shall expire on such date as determined by the Board
of Directors and set forth in the applicable option agreement, provided, that
such date shall not be later than (10) ten years after the date on which the
option is granted.

8.       Exercise of Options.

         Each option granted under the Plan shall be exercisable either in full
or in installments at such time or times and during such period as shall be set
forth in the option agreement evidencing such option, subject to the provisions
of the Plan.  Subject to the requirements in the immediately preceding
sentence, if an option is not at the time of grant immediately exercisable, the
Board of Directors may (i) in the agreement evidencing such option, provide for
the acceleration of the exercise date or dates of the subject option upon the
occurrence of specified events, and/or (ii) at any time prior to the complete
termination of an option, accelerate the exercise date or dates of such option.

9.       Transferability of Options.

         No incentive stock option granted under this Plan shall be assignable
or otherwise transferable by the optionee except by will or by the laws of
descent and distribution or pursuant to a qualified domestic relations order as
defined in the Code or Title I of the Employee Retirement Income Security Act,
or the rules thereunder.  The Board of Directors or any committee thereof may,
in its discretion, authorize all or a portion of any non-statutory options to
be granted to an optionee to be on terms which permit transfer by such optionee
to (i) the spouse, children or grandchildren of the optionee ("Immediate Family
Members"), (ii) a trust or trusts for the exclusive benefit of such Immediate
Family Members, (iii) a partnership in which such Immediate Family Members are
the only partners or (iv) any non-profit charitable organization; provided that
(w) the options must be held by the optionee for a period of at least one month
prior to transfer, (x) there may be no consideration for any such transfer, (y)
the stock option agreement pursuant to which such options are granted must be
approved by the Committee, and must expressly provide for transferability in a
manner consistent with this Section, and (z) subsequent transfers of
transferred options shall be prohibited except by will or the laws of descent
and distribution or pursuant to a qualified domestic relations order as defined
in the Code





                                     - 4 -
<PAGE>   5
or Title I of the Employee Retirement Income Security Act, or the rules
thereunder.  Following transfer, any such options shall continue to be subject
to the same terms and conditions as were applicable immediately prior to
transfer, provided that for purposes of the Plan the term "optionee" shall be
deemed to refer to the transferee.  The events of termination of employment of
Section 10 hereof shall continue to be applied with respect to the original
optionee.  In the event an optionee dies during his employment by the Company
or any of its subsidiaries, or during the three-month period following the date
of termination of such employment, his option shall thereafter be exercisable,
during the period specified in the option agreement, by his executors or
administrators to the full extent to which such option was exercisable by the
optionee at the time of his death during the periods set forth in Section 10 or
11(d).

10.      Effect of Termination of Employment or Other Relationship.

         Except as provided in Section 11(d) with respect to Incentive Stock
Options and except as otherwise determined by the Committee at the date of
grant of an option, and subject to the provisions of the Plan, an optionee may
exercise an option at any time within three (3) months following the
termination of the optionee's employment or other relationship with the Company
or within one (1) year if such termination was due to the death or disability
of the optionee but, except in the case of the optionee's death, in no event
later than the expiration date of the option.  If the termination of the
optionee's employment is for cause or is otherwise attributable to a breach by
the optionee of an employment or confidentiality or non-disclosure agreement,
the option shall expire immediately upon such termination.  The Board of
Directors shall have the power to determine what constitutes a termination for
cause or a breach of an employment or confidentiality or non-disclosure
agreement, whether an optionee has been terminated for cause or has breached
such an agreement, and the date upon which such termination for cause or breach
occurs.  Any such determinations shall be final and conclusive and binding upon
the optionee.

11.      Incentive Stock Options.

         Options granted under the Plan which are intended to be Incentive
Stock Options shall be subject to the following additional terms and
conditions:

         (a)      Express Designation.  All Incentive Stock Options granted
under the Plan shall, at the time of grant, be specifically designated as such
in the option agreement covering such Incentive Stock Options.

         (b)      10% Shareholder.  If any employee to whom an Incentive Stock
Option is to be granted under the Plan is, at the time of the grant of such
option, the owner of stock possessing more than 10% of the total combined
voting power of all classes of stock of the Company (after taking into account
the attribution of stock ownership rules of Section 424(d) of the Code), then
the following special provisions shall be applicable to the Incentive Stock
Option granted to such individual:





                                     - 5 -
<PAGE>   6
                  (i)  The purchase price per share of the Common Stock subject
         to such Incentive Stock Option shall not be less than 110% of the Fair
         Market Value of one share of Common Stock at the time of grant; and

                  (ii) The option exercise period shall not exceed five years
from the date of grant.

          (c)     Dollar Limitation.  For so long as the Code shall so provide,
options granted to any employee under the Plan (and any other incentive stock
option plans of the Company) which are intended to constitute Incentive Stock
Options shall not constitute Incentive Stock Options to the extent that such
options, in the aggregate, become exercisable for the first time in any one
calendar year for shares of Common Stock with an aggregate Fair Market Value,
as of the respective date or dates of grant, of more than $100,000.

         (d)      Termination of Employment, Death or Disability.  No Incentive
Stock Option may be exercised unless, at the time of such exercise, the
optionee is, and has been continuously since the date of grant of his or her
option, employed by the Company, except that:

               (i)    an Incentive Stock Option may be exercised within the
         period of three months after the date the optionee ceases to be an
         employee of the Company (or within such lesser period as may be
         specified in the applicable option agreement), provided, that the
         agreement with respect to such option may designate a longer exercise
         period and that the exercise after such three-month period shall be
         treated as the exercise of a non-statutory option under the Plan;

              (ii)    if the optionee dies while in the employ of the Company,
         or within three months after the optionee ceases to be such an
         employee, the Incentive Stock Option may be exercised by the person to
         whom it is transferred by will or the laws of descent and distribution
         within the period of one year after the date of death (or within such
         lesser period as may be specified in the applicable option agreement);
         and

             (iii)    if the optionee becomes disabled (within the meaning of
         Section 22(e)(3) of the Code or any successor provisions thereto)
         while in the employ of the Company, the Incentive Stock Option may be
         exercised within the period of one year after the date the optionee
         ceases to be such an employee because of such disability (or within
         such lesser period as may be specified in the applicable option
         agreement).

For all purposes of the Plan and any option granted hereunder, "employment"
shall be defined in accordance with the provisions of Section 1.421-7(h) of the
Income Tax Regulations (or any successor regulations).  Notwithstanding the
foregoing provisions, no Incentive Stock Option may be exercised after its
expiration date.





                                     - 6 -
<PAGE>   7
12.      Additional Provisions.

         (a)      Additional Option Provisions.  The Board of Directors may, in
its sole discretion, include additional provisions in option agreements
covering options granted under the Plan, including without limitation
restrictions on transfer, repurchase rights, rights of first refusal,
commitments to pay cash bonuses, to make, arrange for or guaranty loans or to
transfer other property to optionees upon exercise of options, or such other
provisions as shall be determined by the Board of Directors; provided, that
such additional provisions shall not be inconsistent with any other term or
condition of the Plan and such additional provisions shall not cause any
Incentive Stock Option granted under the Plan to fail to qualify as an
Incentive Stock Option within the meaning of Section 422 of the Code.

         (b)      Acceleration, Extension, Etc.  The Board of Directors may, in
its sole discretion, (i) accelerate the date or dates on which all or any
particular option or options granted under the Plan may be exercised or (ii)
extend the dates during which all, or any particular, option or options granted
under the Plan may be exercised; provided, however, that no such extension
shall be permitted if it would cause the Plan to fail to comply with Section
422 of the Code or with Rule 16b-3 (if applicable).

13.      General Restrictions.

         (a)      Investment Representations.  The Company may require any
person to whom an option is granted, as a condition of exercising such option,
to give written assurances in substance and form satisfactory to the Company to
the effect that such person is acquiring the Common Stock subject to the option
or award, for his or her own account for investment and not with any present
intention of selling or otherwise distributing the same, and to such other
effects as the Company deems necessary or appropriate in order to comply with
federal and applicable state securities laws, or with covenants or
representations made by the Company in connection with any public offering of
its Common Stock, including any "lock-up" or other restriction on
transferability.

         (b)      Compliance With Securities Law.  Each option shall be subject
to the requirement that if, at any time, counsel to the Company shall determine
that the listing, registration or qualification of the shares subject to such
option or award upon any securities exchange or automated quotation system or
under any state or federal law, or the consent or approval of any governmental
or regulatory body, or that the disclosure of non-public information or the
satisfaction of any other condition is necessary as a condition of, or in
connection with the issuance or purchase of shares thereunder, such option or
award may not be exercised, in whole or in part, unless such listing,
registration, qualification, consent or approval, or satisfaction of such
condition shall have been effected or obtained on conditions acceptable to the
Board of Directors.  Nothing herein shall be deemed to require the Company to
apply for or to obtain such listing, registration or qualification, or to
satisfy such condition.





                                     - 7 -
<PAGE>   8
14.      Rights as a Shareholder.

         The holder of an option shall have no rights as a shareholder with
respect to any shares covered by the option (including, without limitation, any
rights to receive dividends or non-cash distributions with respect to such
shares) until the date of issue of a stock certificate to him or her for such
shares.  No adjustment shall be made for dividends or other rights for which
the record date is prior to the date such stock certificate is issued.

15.      Adjustment Provisions for Recapitalizations, Reorganizations and
         Related  Transactions.

         (a)      Recapitalizations and Related Transactions.  If, through or
as a result of any recapitalization, reclassification, stock dividend, stock
split, reverse stock split or other similar transaction, (i) the outstanding
shares of Common Stock are increased, decreased or exchanged for a different
number or kind of shares or other securities of the Company, or (ii) additional
shares or new or different shares or other non-cash assets are distributed with
respect to such shares of Common Stock or other securities, an appropriate and
proportionate adjustment shall be made in (x) the maximum number and kind of
shares reserved for issuance under or otherwise referred to in the Plan, (y)
the number and kind of shares or other securities subject to any then
outstanding options under the Plan, and (z) the price for each share subject to
any then outstanding options under the Plan, without changing the aggregate
purchase price as to which such options remain exercisable.  Notwithstanding
the foregoing, no adjustment shall be made pursuant to this Section 15 if such
adjustment (i) would cause the Plan to fail to comply with Section 422 of the
Code or with Rule 16b-3 or (ii) would be considered as the adoption of a new
plan requiring stockholder approval.

         (b)      Reorganization, Merger and Related Transactions.  All
outstanding options under the Plan shall become fully exercisable for a period
of sixty (60) days following the occurrence of any Trigger Event, whether or
not such options are then exercisable under the provisions of the applicable
agreements relating thereto.  For purposes of the Plan, a "Trigger Event" is
any one of the following events:

                  (i) the date on which shares of Common Stock are first
         purchased pursuant to a tender offer or exchange offer (other than
         such an offer by the Company, any Subsidiary, any employee benefit
         plan of the Company or of any Subsidiary or any entity holding shares
         or other securities of the Company for or pursuant to the terms of
         such plan), whether or not such offer is approved or opposed by the
         Company and regardless of the number of shares purchased pursuant to
         such offer;

                  (ii) the date the Company acquires knowledge that any person
         or group deemed a person under Section 13(d)-3 of the Exchange Act
         (other than the Company, any Subsidiary, any employee benefit plan of
         the Company or of any Subsidiary or any entity holding shares of
         Common Stock or other securities of





                                     - 8 -
<PAGE>   9
         the Company for or pursuant to the terms of any such plan or any
         individual or entity or group or affiliate thereof which acquired its
         beneficial ownership interest prior to the date the Plan was adopted
         by the Board), in a transaction or series of transactions, has become
         the beneficial owner, directly or indirectly (with beneficial
         ownership determined as provided in Rule 13d-3, or any successor rule,
         under the Exchange Act), of securities of the Company entitling the
         person or group to 30% or more of all votes (without consideration of
         the rights of any class or stock to elect directors by a separate
         class vote) to which all shareholders of the Company would be entitled
         in the election of the Board of Directors were an election held on
         such date;

                  (iii)  the date, during any period of two consecutive years,
         when individuals who at the beginning of such period constitute the
         Board of Directors of the Company cease for any reason to constitute
         at least a majority thereof, unless the election, or the nomination
         for election by the shareholders of the Company, of each new director
         was approved by a vote of at least two-thirds of the directors then
         still in office who were directors at the beginning of such period;
         and

                  (iv)  the date of approval by the shareholders of the Company
         of an agreement (a "reorganization agreement") providing for:

                                (A)      The merger of consolidation of the
                          Company with another corporation where the
                          shareholders of the Company, immediately prior to the
                          merger or consolidation, do not beneficially own,
                          immediately after the merger or consolidation, shares
                          of the corporation issuing cash or securities in the
                          merger or consolidation entitling such shareholders
                          to 65% or more of all votes (without consideration of
                          the rights of any class of stock to elect directors
                          by a separate class vote) to which all shareholders
                          of such corporation would be entitled in the election
                          of directors or where the members of the Board of
                          Directors of the Company, immediately prior to the
                          merger or consolidation, do not, immediately after
                          the merger or consolidation, constitute a majority of
                          the Board of Directors of the corporation issuing
                          cash or securities in the merger or consolidation; or

                                (B)      The sale or other disposition of all
                          or substantially all the assets of the Company.

                 (c)      Board Authority to Make Adjustments.  Any adjustments
under this Section 15 will be made by the Board of Directors, whose
determination as to what adjustments, if any, will be made and the extent
thereof will be final, binding and conclusive.  No fractional shares will be
issued under the Plan on account of any such adjustments.





                                     - 9 -
<PAGE>   10
16.      Merger, Consolidation, Asset Sale, Liquidation, etc.

         (a)      General.  In the event of any sale, merger, transfer or 
acquisition of the Company or substantially all of the assets of the Company in
which the Company is not the surviving corporation, and provided that after the
Company shall have requested the acquiring or succeeding corporation (or an
affiliate thereof), that equivalent options shall be substituted and such
successor corporation shall have refused or failed to assume all options
outstanding under the Plan or issue substantially equivalent options, then any
or all outstanding options under the Plan shall accelerate and become
exercisable in full immediately prior to such event.  The Committee will notify
holders of options under the Plan that any such options shall be fully
exercisable for a period of fifteen (15) days from the date of such notice, and
the options will terminate upon expiration of such notice.

         (b)      Substitute Options.  The Company may grant options under the 
Plan in substitution for options held by employees of another corporation who
become employees of the Company, or a subsidiary of the Company, as the result
of a merger or consolidation of the employing corporation with the Company or a
subsidiary of the Company, or as a result of the acquisition by the Company, or
one of its subsidiaries, of property or stock of the employing corporation. 
The Company may direct that substitute options be granted on such terms and
conditions as the Board of Directors considers appropriate in the
circumstances.

17.      No Special Employment Rights.

         Nothing contained in the Plan or in any option shall confer upon any 
optionee any right with respect to the continuation of his or her employment by
the Company or interfere in any way with the right of the Company at any time
to terminate such employment or to increase or decrease the compensation of the
optionee.

18.      Other Employee Benefits.

         Except as to plans which by their terms include such amounts as 
compensation, the amount of any compensation deemed to be received by an
employee as a result of the exercise of an option or the sale of shares
received upon such exercise will not constitute compensation with respect to
which any other employee benefits of such employee are determined, including,
without limitation, benefits under any bonus, pension, profit-sharing, life
insurance or salary continuation plan, except as otherwise specifically
determined by the Board of Directors.

19.      Amendment of the Plan.

         (a)      The Board of Directors may at any time, and from time to 
time, modify or amend the Plan in any respect; provided, however, that if at
any time the approval of the shareholders of the Company is required under
Section 422 of the Code or any successor provision with respect to Incentive
Stock Options, or under Rule 16b-3,





                                     - 10 -
<PAGE>   11
the Board of Directors may not effect such modification or amendment without
such approval.

         (b)      The modification or amendment of the Plan shall not, without 
the consent of an optionee, affect his or her rights under an option previously
granted to him or her.  With the consent of the optionee affected, the Board of
Directors may amend outstanding option agreements in a manner not inconsistent
with the Plan.  The Board of Directors shall have the right to amend or modify
(i) the terms and provisions of the Plan and of any outstanding Incentive Stock
Options granted under the Plan to the extent necessary to qualify any or all
such options for such favorable federal income tax treatment (including
deferral of taxation upon exercise) as may be afforded incentive stock options
under Section 422 of the Code and (ii) the terms and provisions of the Plan and
of any outstanding option to the extent necessary to ensure the qualification
of the Plan under Rule 16b-3.

20.      Withholding.

         (a)      The Company shall have the right to deduct from payments of 
any kind otherwise due to the optionee any federal, state or local taxes of any
kind required by law to be withheld with respect to any shares issued upon
exercise of options under the Plan.  Subject to the prior approval of the
Company, which may be withheld by the Company in its sole discretion, the
optionee may elect to satisfy such obligations, in whole or in part, (i) by
causing the Company to withhold shares of Common Stock otherwise issuable
pursuant to the exercise of an option or (ii) by delivering to the Company
shares of Common Stock already owned by the optionee.  The shares so delivered
or withheld shall have a Fair Market Value equal to such withholding obligation
as of the date that the amount of tax to be withheld is to be determined.  An
optionee who has made an election pursuant to this Section 20(a) may only
satisfy his or her withholding obligation with shares of Common Stock which are
not subject to any repurchase, forfeiture, unfulfilled vesting or other similar
requirements.

         (b)      The acceptance of shares of Common Stock upon exercise of an 
Incentive Stock Option shall constitute an agreement by the optionee (i) to
notify the Company if any or all of such shares are disposed of by the optionee
within two years from the date the option was granted or within one year from
the date the shares were issued to the optionee pursuant to the exercise of the
option, and (ii) if required by law, to remit to the Company, at the time of
and in the case of any such disposition, an amount sufficient to satisfy the
Company's federal, state and local withholding tax obligations with respect to
such disposition, whether or not, as to both (i) and (ii), the optionee is in
the employ of the Company at the time of such disposition.

         (c)      Notwithstanding the foregoing, in the case of a Reporting 
Person whose options have been granted in accordance with the provisions of
Section 3(b) herein, no election to use shares for the payment of withholding
taxes shall be effective unless made in compliance with any applicable
requirements of Rule 16b-3.





                                     - 11 -
<PAGE>   12
21.      Cancellation and New Grant of Options, Etc.

         The Board of Directors shall have the authority to effect, at any 
time and from time to time, with the consent of the affected optionees, (i) 
the cancellation of any or all outstanding options under the Plan and the grant
in substitution therefor of new options under the Plan covering the same or
different numbers of shares of Common Stock and having an option exercise price
per share which may be lower or higher than the exercise price per share of the
cancelled options or (ii) the amendment of the terms of any and all outstanding
options under the Plan to provide an option exercise price per share which is
higher or lower than the then-current exercise price per share of such
outstanding options.

22.      Effective Date and Duration of the Plan.
         (a)      Effective Date.  The Plan shall become effective when
adopted by the Board of Directors, but no Incentive Stock Option granted under
the Plan shall become exercisable unless and until the Plan shall have been
approved by the Company's shareholders.  If such shareholder approval is not
obtained within twelve months after the date of the Board's adoption of the
Plan, no options previously granted under the Plan shall be deemed to be
Incentive Stock Options and no Incentive Stock Options shall be granted
thereafter.  Amendments to the Plan not requiring shareholder approval shall
become effective when adopted by the Board of Directors; amendments requiring
shareholder approval (as provided in Section 21) shall become effective when
adopted by the Board of Directors, but no Incentive Stock Option granted after
the date of such amendment shall become exercisable (to the extent that such
amendment to the Plan was required to enable the Company to grant such
Incentive Stock Option to a particular optionee) unless and until such
amendment shall have been approved by the Company's shareholders.  If such
shareholder approval is not obtained within twelve months of the Board's
adoption of such amendment, any Incentive Stock Options granted on or after the
date of such amendment shall terminate to the extent that such amendment to the
Plan was required to enable the Company to grant such option to a particular
optionee.  Subject to this limitation, options may be granted under the Plan at
any time after the effective date and before the date fixed for termination of
the Plan.

         (b)      Termination.  Unless sooner terminated in accordance with 
Section 16, the Plan shall terminate upon the earlier of (i) the close of
business on the day next preceding the tenth anniversary of the date of its
adoption by the Board of Directors, or (ii) the date on which all shares
available for issuance under the Plan shall have been issued pursuant to the
exercise or cancellation of options granted under the Plan.  If the date of
termination is determined under (i) above, then options outstanding on such
date shall continue to have force and effect in accordance with the provisions
of the instruments evidencing such options.

23.      Provision for Foreign Participants.

         The Board of Directors may, without amending the Plan, modify awards 
or options granted to participants who are foreign nationals or employed
outside the





                                     - 12 -
<PAGE>   13
United States to recognize differences in laws, rules, regulations or customs
of such foreign jurisdictions with respect to tax, securities, currency,
employee benefit or other matters.

24.      Governing Law.

         The provisions of this Plan shall be governed and construed in
accordance with the laws of the State of Delaware without regard to the
principles of conflicts of laws.





                                     - 13 -

<PAGE>   1

ENTREMED, INC.
EXHIBIT 21



                         SUBSIDIARIES OF ENTREMED, INC.


<TABLE>
<CAPTION>
               Subsidiary                        State of Incorporation
               ----------                        ----------------------
                                                 
         <S>                                             <C>
         Cytokine Sciences, Inc.                         Delaware
</TABLE>










<PAGE>   1
                                                                    Exhibit 23.1

                        CONSENT OF INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement on
Form S-8 pertaining to the EntreMed, Inc. 1992 Stock Incentive Plan of our
report dated February 5, 1998, with respect to the consolidated financial
statements of EntreMed, Inc.  included in the Annual Report (Form 10-K) for the
year ended December 31, 1997.

                                                ERNST & YOUNG LLP

Atlanta, Georgia
March 27, 1998








<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AND THE CONDENSED CONSOLIDATED STATEMENT OF
OPERATIONS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   12-MOS                   12-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1996             DEC-31-1996
<PERIOD-END>                               DEC-31-1997             DEC-31-1996             SEP-30-1996
<CASH>                                      18,232,491              33,051,206              53,445,893
<SECURITIES>                                27,012,580              19,669,623                       0
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                            45,935,774              53,220,464              53,750,746
<PP&E>                                       2,211,263               1,200,373               1,149,376
<DEPRECIATION>                                 712,482                 375,814                 336,569
<TOTAL-ASSETS>                              47,838,663              54,146,339              54,665,214
<CURRENT-LIABILITIES>                        4,481,403               4,171,340               3,636,288
<BONDS>                                              0                       0                       0
                                0                       0                       0
                                          0                       0                       0
<COMMON>                                       122,538                 120,096                 119,939
<OTHER-SE>                                  41,953,094              47,694,191              48,628,653
<TOTAL-LIABILITY-AND-EQUITY>                47,838,663              54,146,339              54,665,214
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                             4,757,488               4,625,000               3,277,500
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                        0                       0                       0
<OTHER-EXPENSES>                            13,914,429              10,989,294               7,703,668
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               1,418                  27,267                  23,755
<INCOME-PRETAX>                            (6,536,729)             (4,769,832)             (3,519,432)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                        (6,536,729)             (4,769,832)             (3,519,432)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                               (6,536,729)             (4,769,832)             (3,519,432)
<EPS-PRIMARY>                                   (0.54)                  (0.50)                  (0.40)
<EPS-DILUTED>                                   (0.54)                  (0.50)                  (0.40)
        

</TABLE>

<TABLE> <S> <C>


<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AND THE CONDENSED CONSOLIDATED STATEMENT OF
OPERATIONS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL
STATEMENTS.
</LEGEND>
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   3-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1995
<PERIOD-END>                               JUN-30-1996             MAR-31-1996             DEC-31-1995
<CASH>                                      55,497,455               7,600,058               6,885,099
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                        0                       0                       0
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                          0                       0                       0
<CURRENT-ASSETS>                            55,840,618               7,715,447               9,389,115
<PP&E>                                       1,054,330                 978,818                 941,226
<DEPRECIATION>                                 283,877                 234,408                 186,827
<TOTAL-ASSETS>                              56,713,275               8,606,849              10,146,383
<CURRENT-LIABILITIES>                        4,193,940               3,988,329               3,699,305
<BONDS>                                              0                       0                       0
                                0                       0                       0
                                          0                       0                       0
<COMMON>                                       119,939                  64,606                  63,766
<OTHER-SE>                                  50,007,730               2,051,853               3,537,494
<TOTAL-LIABILITY-AND-EQUITY>                56,713,275               8,606,849              10,146,383
<SALES>                                              0                       0                       0
<TOTAL-REVENUES>                             2,185,000               1,092,500                 711,169
<CGS>                                                0                       0                       0
<TOTAL-COSTS>                                        0                       0                       0
<OTHER-EXPENSES>                             4,552,950               2,834,681               8,398,488
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                              18,190                   9,547                  65,754
<INCOME-PRETAX>                            (2,140,345)             (1,675,407)             (7,708,219)
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                        (2,140,345)             (1,675,407)             (7,708,219)
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                               (2,140,345)             (1,675,407)             (7,708,219)
<EPS-PRIMARY>                                   (0.30)                  (0.26)                  (1.41)
<EPS-DILUTED>                                   (0.30)                  (0.26)                  (1.41)
        

</TABLE>


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