EXOGEN INC
10-K, 1997-12-19
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                 ---------------

                                    FORM 10-K

(Mark One)

X   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT
    OF 1934  

    For the fiscal year ended          September 30, 1997
                                       ------------------ 

                                       OR

    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
    ACT OF 1934  

    For the transition period from                             to

                         Commission file number 0-26154


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


         Delaware                                             22-3208468
- --------------------------------------------------------------------------------
(State or other jurisdiction of                           (I.R.S. Employer 
 incorporation or organization)                          Identification No.)

     10 Constitution Avenue
     P. O. Box 6860, Piscataway  NJ                             08855
- --------------------------------------------------------------------------------
(Address of principal executive offices)                      (Zip Code)

                                 (732) 981-0990
- --------------------------------------------------------------------------------
       (Registrant's telephone number, including area code)


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


        Title of each class          Name of each exchange on which registered
        -------------------          -----------------------------------------
                                     
               None                                         None

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

                         Common Stock, $.0001 par value
- --------------------------------------------------------------------------------
                                (Title of Class)

- --------------------------------------------------------------------------------
                                (Title of Class)

<PAGE>
         Indicate  by check  mark  whether  the  registrant:  (1) has  filed all
reports  required to be filed by Section 13 or 15(d) of the Securities  Exchange
Act of 1934 during the preceding 12 months (or for such shorter  period that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.
                        Yes      [ X ]         No   [   ]

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

         The  registrant  has only one class of voting  securities,  its  common
stock,  par value  $0.0001  per share (the  "Common  Stock"),  and no classes of
nonvoting securities. While it is difficult to determine the number of shares of
Common  Stock  owned  by  non-affiliates,  the  registrant  estimates  that  the
aggregate market value of outstanding  Common Stock on November 30, 1997, (based
upon the  closing  selling  price of such  Common  Stock on the Nasdaq  National
Market on November  28, 1997) held by  non-affiliates  was  approximately  $22.9
million.  For this computation,  the registrant has excluded the market value of
all shares of its Common  Stock  reported  as  beneficially  owned by  officers,
directors and certain significant stockholders of the registrant. Such exclusion
shall not be deemed to constitute an admission  that any such  stockholder is an
affiliate of the registrant.

         As of November 30, 1997,  there were outstanding  11,802,159  shares of
the registrant's Common Stock, par value $0.0001.


                       DOCUMENTS INCORPORATED BY REFERENCE

         The Proxy  Statement  of Exogen,  Inc.  in  connection  with the Annual
Meeting of Stockholders scheduled on or about February 25, 1998, is incorporated
by reference into Part III of this Form 10-K.
<PAGE>
                                  EXOGEN, INC.

                          1997 Form 10-K Annual Report

                                TABLE OF CONTENTS


                                      Page
                                     PART I

Item 1.    Business.............................................................
Item 2.    Properties...........................................................
Item 3.    Legal Proceedings....................................................
Item 4.    Submission of Matters to a Vote of Security Holders..................
Item 4a.   Executive Officers of the Registrant.................................

                                     PART II

Item 5.    Market for Registrant's Common Equity and Related Stockholder Matters
Item 6.    Selected Financial Data..............................................
Item 7.    Management's Discussion and Analysis of Financial Condition
               and Results of Operations........................................
Item 8.    Financial Statements and Supplementary Data..........................
Item 9.    Changes in and Disagreements With Accountants on Accounting
               and Financial Disclosure.........................................

                                    PART III

Item 10.   Directors and Executive Officers of the Registrant...................
Item 11.   Executive Compensation...............................................
Item 12.   Security Ownership of Certain Beneficial Owners and Management.......
Item 13.   Certain Relationships and Related Transactions.......................

                                     PART IV

Item 14.   Exhibits, Financial Statement Schedules, and Reports on Form 8-K.....
<PAGE>
                                     PART I


Item 1.  Business

         Exogen,   Inc.   (the   "Company"  or  "Exogen")   designs,   develops,
manufactures,  and markets  medical  devices for the  non-invasive  treatment of
musculoskeletal  injury and disease.  The Company's  proprietary  ultrasound and
mechanical-stress  technologies  are based on the principle  that bone growth is
stimulated by mechanical force. The Company's Sonic Accelerated Fracture Healing
System ("SAFHS(R)") device utilizes mechanical force, produced by ultrasound, to
accelerate fracture healing for closed, cast-immobilized, fresh fractures of the
tibia and distal  radius  within its approved  indications.  The SAFHS device is
small and  portable,  and is used by the patient once daily for 20 minutes.  The
SAFHS device is the only medical device approved by the FDA for the acceleration
of fresh-fracture healing of the tibia and the distal radius.

         The Company's  Pre-Market  Approval  ("PMA")  application for its first
model,   the  SAFHS  Model  2A,  was  approved  by  the  U.  S.  Food  and  Drug
Administration ("FDA") in October 1994. The Company designed a second-generation
SAFHS device, the SAFHS 2000(R),  which is entirely battery operated and smaller
and lighter  than the SAFHS Model 2A for  enhanced  portability.  The SAFHS 2000
utilizes  the same  ultrasound  signal as does the SAFHS  Model 2A. The  Company
filed a PMA  supplement  for the SAFHS 2000 in December 1995, and in March 1997,
the FDA approved this supplement.  In May 1997, the Company commenced commercial
distribution of the SAFHS 2000 in the United States.

         The Company  established a subsidiary in Germany  during fiscal 1995 as
part of its strategy to  introduce  the SAFHS  device in Europe,  and  commenced
commercial  distribution  of the device in  certain  European  countries  during
fiscal 1996 (see "Sales and Marketing").

Industry Overview

Background

         Bone, which forms the human skeleton,  undergoes constant change during
an individual's  lifetime through a dynamic process of cellular action.  Bone is
continually  remodeled  so  that  between  10%  and  20% of the  adult  skeleton
undergoes  resorption  (removal) and formation annually.  At the cellular level,
bone  consists  of   specialized   bone  cells   (osteoblasts,   osteocytes  and
osteoclasts) and minerals,  proteins, hormones, water, and other large molecules
such as  sugars.  Bone is formed by  osteoblasts,  which  line the  surface of a
bone's structure, and osteocytes, which are located within the bone's structure.
Osteoclasts  are cells that resorb bone through a  degradation  process.  Bone's
natural remodeling process,  which is balanced between resorption and formation,
can be affected by a number of factors.  For example,  smoking has been shown to
slow the process of bone  formation,  while exercise such as walking or running,
which  applies  mechanical  force  to the  body on  impact,  has  been  shown to
stimulate the process of bone formation.

         Bone  progresses  through  two  forms as it  develops:  woven  bone and
lamellar bone.  Woven bone is unorganized and premature,  and is found either in
growing bones or at fracture sites as newly formed bone. Lamellar bone is mature
bone that results from the further remodeling of woven bone. Two types of mature
<PAGE>
bone comprise  substantially all of the human skeleton:  cortical bone (dense or
compact  bone),  which  constitutes  approximately  80%  of  the  skeleton,  and
cancellous  bone  (spongy  bone),  which  constitutes  approximately  20% of the
skeleton.  Cortical bone is  approximately  30% porous,  and consists of a dense
bundle of vascular  channels,  containing  blood  vessels,  surrounded by mature
bone.  Cancellous bone is approximately  70% porous,  highly  vascularized,  and
consists of a loosely formed matrix of beams designed to withstand the principal
stresses and strains  applied to the bone.  The density of cortical bone is four
to six times higher than cancellous bone.  Cortical bone forms the middle 80% of
the long bones of the body, including the tibia and fibula in the lower leg, the
femur in the upper leg, the radius and ulna in the lower arm, and the humerus in
the upper arm.  Cancellous bone constitutes the remaining 20% of bone located at
the ends of the long bones. For example,  the distal radius, which is cancellous
bone, is the portion of the radius located closest to the wrist.  All cancellous
bone is surrounded by a cortical outer layer.

         When a fracture occurs in either cortical or cancellous bone, a complex
biological healing process is initiated. In cortical bone, there are five stages
of repair and remodeling that, if completed,  eventually restore the bone to its
original pre-fracture condition.  The first healing stage lasts approximately 48
hours,  and is an inflammatory  response in the tissue at the fracture site that
stimulates  the  formation  of stem (early  stage) cells  originating  from bone
marrow  and from  surface  tissue  at the  fracture  site.  As the  inflammation
subsides,  the dead  tissue at the bone ends is removed  and stem cells begin to
organize into a cellular matrix. In the second stage, which lasts several weeks,
stem cells proliferate in the bone marrow cavity and evolve into cartilage cells
and soft fracture callus (a matrix of fibrous tissue,  cartilage and woven bone)
in the outer and inner  surface of the bone.  During this  period,  dead bone is
continually  replaced with new cartilage  cells.  In the third stage of healing,
which  begins  approximately  six to eight  weeks  after  fracture,  there is an
increase in soft callus that fills the marrow cavity and forms along the outside
of the bone. In the fourth stage,  which  typically  begins 10 to 12 weeks after
fracture  and  extends  to 20 weeks  or  more,  the  fracture  callus  gradually
calcifies through osteoblastic action,  increasing the stability of the fracture
site. This calcified  callus begins to remodel toward the end of this stage, and
continues to convert into lamellar bone in the fifth stage.

         Fractures in cancellous bone heal in substantially  the same manner and
stages as cortical bone, except that cancellous bone does not have a bone marrow
cavity,  so bone healing occurs along the matrix of internal beams that comprise
its structure.  Cancellous bone heals in approximately  one-third less time than
cortical bone,  primarily  because  cancellous  bone is more  vascularized  than
cortical bone.

         The process of bone  healing in fresh  fractures  generally  takes from
four to  eight  months  for  cortical  bone and from  three  to six  months  for
cancellous bone. Many fractures take  substantially  longer to heal, and some do
not heal at all.  "Non-unions"  are  fractures  that have not healed within nine
months and have shown no sign of healing for the prior three months.  Physicians
may identify certain fractures, at the time of occurrence,  as being susceptible
to  extended  healing  times  and  associated  complications.  According  to the
orthopaedic literature,  some of the factors taken into account by physicians in
making such a determination  include  fracture  characteristics  such as the gap
size,  location,  displacement,  and fragmentation of the fracture,  and patient
characteristics such as the age, gender,  health condition,  weight, and smoking
habits of the patient.  Many of these  fractures could result in costly surgery,
rehabilitation therapy, and in some cases, permanent disability.
<PAGE>
Fracture Market

         Over 6,000,000 fractures occur each year in the United States, of which
more than 800,000 are tibia and distal radius  fractures.  The Company  believes
that  approximately  350,000 of these  tibia and  distal  radius  fractures  are
candidates for treatment with the SAFHS device. Many of these fractures could be
treated  surgically,  and in some instances,  multiple  surgical  procedures are
needed to achieve healing.  Each of these surgical  procedures may involve costs
of $7,500 or more, and can result in complications, such as infection and death.
In  addition,  these  fractures  expose the patient to the risks of  longer-term
complications,  such as severe muscular  atrophy,  joint disorders,  and loss of
function. Patients often require rehabilitative therapy for up to several months
following surgery,  at an additional cost of approximately  $1,000 to $4,000 per
fracture.  Indirect  medical  costs due to lost wages,  lost  productivity,  and
immobility may also be incurred during the healing period.

Methods of Treating Fractures

         Various  methods  exist for the treatment of bone  fractures.  The most
common therapy is to immobilize  the fracture with an external  cast,  generally
for 12 to 18 weeks for tibia fractures and five to eight weeks for distal radius
fractures.  Certain  fractures are treated  surgically  using one or more of the
following  methods to provide  stability and promote healing:  internal fixation
devices  such as  plates,  rods and  screws;  bone  grafts  using  human bone or
synthetic bone; and external  fixation  devices,  which are external frames with
metal pins placed through the skin into the bone.

         All of the  conventional  therapies for bone  fractures  supplement the
body's fracture  healing process by immobilizing  the injured bone, by providing
scaffolds for healing such as bone grafts, or by initiating healing when the
healing process has prematurely stopped. None, however, accelerates the fracture
healing process.  Different  approaches have been  investigated and developed to
augment or replace  conventional  therapies,  including  electrical  stimulation
devices and bone  growth  factors.  Electrical  stimulation  devices  were first
approved by the FDA and introduced  commercially  in 1979.  Although  electrical
stimulation   devices  demonstrate   efficacy  in  initiating   healing,   their
indications  for use have been  limited  to  non-union  fractures.  Bone  growth
factors are proteins that promote the healing  process and have been in clinical
trials for several years. However,  these clinical trials have also been limited
to non-union fractures.

         Clinical studies begun in the mid-1980s,  which supported the Company's
PMA application for its SAFHS device, demonstrated that mechanical force applied
to bone  induces the  formation  of bone and  accelerates  the  natural  healing
process in fresh fractures.  This work was based on a widely accepted scientific
principle  that bone  responds to mechanical  force by inducing  bone  formation
and/or   inhibiting  bone  loss.   These  clinical   studies   established  that
acceleration of fracture  healing is accomplished by using the mechanical  force
produced by low-intensity ultrasound waves.

         Ultrasound is mechanical  energy that can be transmitted  into the body
in pulses of acoustic  (sound)  pressure  waves at  frequencies  above the human
hearing  range.  Ultrasound is used for numerous  non-invasive  therapeutic  and
diagnostic purposes,  and millions of ultrasound procedures are performed in the
United States each year.  Therapeutic ultrasound systems transmit high levels of
acoustic energy to generate heat (thermal effect) into the tissue, and have been
found  to  be  a  relatively  safe  and  effective  non-invasive  treatment  for
soft-tissue   injuries  including  damaged  ligaments,   tendons,  and  muscles.
<PAGE>
Therapeutic  ultrasound has not,  however,  been widely  investigated for use in
bone,  because of the potential  risk of inducing  excessive  heat into the bone
tissue.  Diagnostic ultrasound,  by contrast, uses low levels of acoustic energy
(non-thermal)  as a safe,  non-invasive  method for viewing  internal organs and
fetuses. These low levels, however, were not previously thought to have biologic
therapeutic  effects.  The SAFHS clinical trials demonstrated that low-intensity
(similar  to  diagnostic  ultrasound),   non-thermal,   specifically  programmed
ultrasound  energy can safely  accelerate the healing of fresh fractures  within
the approved indications for the SAFHS device.

Osteoporosis Background and Market

         Numerous bone disorders  result from changes in the natural  remodeling
process  of bone  resorption  and  formation.  The most  widespread  of these is
osteoporosis,   a  disease   characterized  by  a  decrease  in  bone  mass  and
deterioration  of bone  structure.  This  deterioration  leads to an increase in
fracture risk due to bone fragility and reduced  strength of the  weight-bearing
skeleton,  particularly the spine and the hip. Loss of bone mass occurs when the
removal of bone by the osteoclasts exceeds the bone-formation  activities of the
osteoblasts and osteocytes.  As a person ages, the osteoclastic  action tends to
predominate and,  beginning at approximately age 40, bone mass begins to decline
at the rate of approximately  0.5% per year. Women lose a significantly  greater
percentage of bone mass  (between 10% and 20%)  following the onset of menopause
and the cessation of estrogen production.  Bone mass also deteriorates from lack
of physical activity such as extended bed rest.

         Over 28,000,000 people in the United States, primarily  post-menopausal
women and the elderly,  have osteoporosis.  In 1992, over 1,200,000 fractures in
the United States, or approximately  20% of the estimated total fractures,  were
osteoporosis-related.  Existing  drug  therapies,  such as  estrogen-replacement
therapy,  calcitonin,  and calcium  supplements,  have been useful in preventing
bone loss,  but none can form new bone. In addition,  use of existing  therapies
are limited by  complications  and certain side  effects  including an increased
incidence of endometrial,  ovarian, and breast cancers in women taking estrogen.
Strenuous exercise has been shown to reduce bone loss in the elderly but must be
performed with caution as exercise may itself cause fractures.  Several new drug
therapies are in clinical  trials for the treatment of  osteoporosis  to address
the limitations of current  therapeutic  approaches.  A new  estrogen-derivative
drug thereapy, which does not have the potential for side effects of cancer, has
recently  been  approved for the  treatment of  osteoporosis.  In addition,  the
Company  is  developing  a   mechanical-stress   device  for  the  treatment  of
osteoporosis,  although this product is not commercially available to treat this
disease  and there is no  assurance  that the  Company  will  ever  successfully
develop or commercialize such a device.

Business Strategy

         The  Company's  business  strategy  is to become a leading  provider of
devices for the non-invasive  treatment of  musculoskeletal  injury and disease.
The  Company   believes  a  significant   market   exists  for   cost-effective,
non-invasive  medical  devices  that  allow  the  patient  to  return  to normal
activities  as  rapidly as  possible.  The  following  are key  elements  of the
Company's strategy:

         Promote  Physician  Acceptance.  Exogen  is the  only  company  to have
obtained FDA approval to market a medical device for accelerating the healing of
fresh fractures of the tibia and distal radius.  The Company seeks to gain broad
physician acceptance of this new treatment modality through the dissemination of
scientific,  clinical,  and  patient-outcomes  data on the SAFHS treatment.  The
Company's  marketing  efforts are targeted to  orthopaedic  surgeons in academic
institutions, trauma centers, and community-based practices.
<PAGE>
         Establish  Reimbursement by Third-Party  Payors.  In the United States,
the Company is engaged in broad-based  efforts to obtain  reimbursement  for the
SAFHS  device as a new  treatment  device  from  third-party  payors,  including
managed  care  organizations,   workers'  compensation   insurers,   traditional
indemnity insurers, and Medicare. To substantiate the effectiveness of the SAFHS
devices, the Company has collected patient-outcomes data on over 4,000 fractures
since the  introduction  of SAFHS in October 1994. The Company uses  scientific,
clinical, and patient-outcomes data on the safety and effectiveness of the SAFHS
treatment  to  support  the   Company's   third-party   reimbursement   efforts.
Internationally,  the  Company  uses  indigenous  clinical  data as well as data
collected  in  the  United   States  to  support   reimbursement   efforts  with
governmental and major private insurers.

         Broaden  Sales and  Marketing  Efforts.  The Company  has a  nationwide
network of independent and direct sales representatives in the United States. At
September  30,  1997,   the  Company  had  17  employees  in  its  direct  sales
organization and a network of 185 independent sales  representatives  throughout
the  United  States.  A primary  focus of the  Company's  marketing  efforts  is
national and regional managed care  organizations and insurance  carriers,  with
coordinated  marketing  through  the  Company's  sales  force and  reimbursement
specialists.  During 1996, the Company  commenced  marketing the SAFHS device in
several  European  countries  through its wholly owned German  subsidiary  using
sales agents and  independent  distributors.  In addition,  in December 1995 the
Company  signed  a  development   agreement  with  Teijin  Limited,  a  Japanese
corporation, to market the SAFHS device in Japan, subject to Japanese regulatory
approvals.

         Expand  Technology  Applications.  The Company is seeking to expand the
applications  of its SAFHS  treatment to other  fractures.  In late 1997,  pilot
clinical  trials using SAFHS were completed in Europe for reamed  intramedullary
rodded fractures. Also in 1997, the Company completed preclinical studies in the
United  States for spine  fusion,  and is in  preclinical  studies for cartilage
repair.  The Company expects that  university-based  pilot clinical trials using
the SAFHS treatment in leg-lengthening procedures will be completed in 1998. The
Company has also developed a mechanical-stress device that may prevent and treat
osteoporosis,  and commenced a pilot  clinical trial for this device during 1996
on 62 post-menopausal  women in the United States, which trial will be completed
in early 1998.  The Company is seeking to  establish  strategic  alliances  with
other  health-care  companies to further  develop  certain  applications  of its
technologies.

         Establish   Manufacturing   Capability.   During   1996,   the  Company
established manufacturing capability at its facility in Piscataway,  New Jersey,
to augment its outside  manufacturing  source. The Company refurbishes the SAFHS
Model 2A, and in 1997, began  manufacturing the SAFHS 2000. The Company believes
that  this  manufacturing  capability,  together  with its  product  engineering
capability,  has and  will  continue  to (i)  advance  its  product  design  and
development  efforts,  (ii) provide  better  control  over its costs,  and (iii)
reduce its dependence on its contract  manufacturer  that also  manufactures the
SAFHS 2000.

Products and Products Under Development

         Exogen's  products  are  focused  on  the  non-invasive   treatment  of
musculoskeletal  injury and disease,  and are based on the  principle  that bone
growth  is   stimulated   by  mechanical   force.   The  Company's   proprietary
mechanical-force  technologies,  including  ultrasound  and  mechanical  stress,
deliver energy that promotes the growth, repair, and maintenance of bone.
<PAGE>
Sonic Accelerated Fracture Healing System ("SAFHS")

         SAFHS is a  non-invasive  device  that  delivers  ultrasound  energy to
accelerate  fracture  healing  through  specifically  programmed,  low-intensity
acoustic  pressure  waves.  The SAFHS treatment was designed to maximize ease of
use. Once the SAFHS device has been prescribed for a patient, the physician cuts
a window in the patient's  cast and installs a plastic  coupling  fixture in the
window.  The  transducer  is  locked  into  the  fixture  for  treatment,  and a
protective  cap is inserted  in the  fixture  when the device is not being used.
Treatment  requires  use of the  device  only  once  daily for 20  minutes.  The
treatment  period  averages  approximately  four months for treatment of a tibia
fracture and approximately eight weeks for a distal radius fracture.  The device
is  portable  and may be used by the  patient  at  home,  in the  workplace,  or
elsewhere.  The patient coats the transducer head with an  ultrasound-conducting
coupling gel to facilitate  transmission of the ultrasound signal, and locks the
transducer  into the coupling  fixture set in the cast.  The SAFHS device alerts
the  patient  about  treatment  status and also  contains  a  patient-compliance
monitoring system that automatically records all treatment sessions and provides
a detailed  record,  including date and time, of the patient's use of the device
for monitoring by the physician and the Company.

         The prescribing  physician is responsible for submitting to the Company
(i) the prescription for the SAFHS device,  (ii) a letter of medical  necessity,
and (iii) the required  paperwork for  submission of the claim to the applicable
third-party  payor.  The  device is shipped  by the  Company to the  physician's
office,  either  directly  or through the  Company's  sales  representatives.  A
Company  sales  representative  is  available  at  the  physician's  office,  if
necessary,  to assist the physician in instructing the patient in the use of the
SAFHS device. The documentation signed by the patient requires the return of the
device  at the end of the  treatment  period.  The  main  operating  unit may be
serviced and reused;  the transducer,  however,  is designed to be discarded and
ceases to operate  once the  battery  has been  expended.  Patients do not pay a
refundable  deposit for the device,  and consequently,  the Company expects that
not all SAFHS devices will be returned by patients.

         The Company provides the SAFHS device for the duration of the treatment
of the fracture,  regardless of the length of treatment. The Company maintains a
toll-free telephone number and provides 24-hour coverage to respond to inquiries
from either patients or physicians. If necessary, replacement units and supplies
are provided to the patient.

         SAFHS  Model 2A. The  original  SAFHS  device,  the SAFHS  Model 2A, is
currently  being sold  principally  outside  the United  States.  This device is
comprised of two  electronic  components.  The main  operating unit controls the
treatment  time  and  monitors  the  proper  attachment  and  operation  of  the
ultrasound  transducer,  and is plugged into a standard  electrical  outlet. The
second component, the ultrasound transducer, delivers a specific,  low-intensity
ultrasound signal to the fracture site, and is powered by a limited-life battery
designed to last for 120  treatments of 20 minutes each. To prevent  electricity
from traveling  between the  transducer  and the main  operating  unit, the main
operating unit and the  transducer  communicate  through fiber optics.  The list
price of the SAFHS Model 2A is $2,950, regardless of the length of treatment.
<PAGE>
         SAFHS 2000.  The Company's  second-generation  SAFHS device,  the SAFHS
2000, is entirely  battery operated and smaller and lighter than the SAFHS Model
2A for enhanced portability.  The SAFHS 2000 utilizes the same ultrasound signal
as the SAFHS Model 2A. The Company filed a PMA  supplement for the SAFHS 2000 in
December 1995, and in March 1997, the FDA approved this supplement. In May 1997,
the Company  commenced  commercial  distribution of the SAFHS 2000 in the United
States. The list price of the SAFHS 2000 is $3,500,  regardless of the length of
treatment.

Mechanical-Stress Device

         The  Company  has  developed  a  mechanical-stress  device  designed to
inhibit bone loss and increase bone mass. The device delivers  mechanical  force
to the bone similar to the SAFHS  technology.  The device induces  low-intensity
vibrational stress within the skeleton at frequencies similar to those generated
by the muscles of the human body. The device consists of a resonating  platform,
on  which  the  patient  stands,   that  delivers   mechanical   stress  to  the
weight-bearing skeleton.

         In preclinical  studies  conducted by the Company,  the device has been
shown to inhibit bone loss and enhance bone mass with treatments of less than 20
minutes per day. In a clinical  study  conducted  by the Company in Europe,  the
Company  has  demonstrated  that  approximately  90% of the  vibrational  stress
produced by this device reaches the hip and approximately 85% reaches the spine,
the regions of the  weight-bearing  skeleton most  susceptible  to bone loss and
resulting  fractures.  The Company commenced pilot clinical trials in the United
States  for  its  mechanical-stress   device  in  1996,  and  anticipates  their
completion in 1998.  Following  completion  of these pilot  trials,  the Company
intends to submit to the FDA an IDE for pivotal  clinical  trials,  and plans to
begin the pivotal  clinical trials if a strategic  alliance is  established.  No
assurance can be given that the  mechanical-stress  device will prove to be safe
and  efficacious,  that a strategic  alliance will be established,  that product
development  will ever be  successfully  completed,  that a PMA, if applied for,
will be granted by the FDA on a timely basis, or at all, that adequate levels of
third-party  reimbursement  will be  available,  or that  the  mechanical-stress
device will ever achieve commercial acceptance.

Results of SAFHS Clinical Trials

         The results of the SAFHS  clinical  trials,  which were acquired by the
Company from Interpore Orthopaedics, Inc. ("Interpore"), demonstrated the safety
and efficacy of the SAFHS treatment,  and the Company believes such results were
critical to  obtaining  approval for the SAFHS Model 2A from the FDA for certain
fracture  indications.  The PMA  application for the SAFHS Model 2A was filed in
July 1990 and  received  FDA  approval  in  October  1994.  The PMA  application
consisted  of  clinical  data on 182  fractures  in 179  patients at 21 clinical
sites. Of these  fractures,  97 were included in the tibia clinical trial and 85
were  included  in the distal  radius  trial.  The SAFHS  clinical  trials  were
prospective, randomized, double-blind, and placebo-controlled. All patients were
cast-immobilized,  and all received  treatment,  commencing within seven days of
fracture,  using  the SAFHS  device  or, in the case of the  placebo  group,  an
identical device with no ultrasound signal emission.

         The results of both  studies  showed that the average  time to a healed
fracture  (as  measured   clinically  and  by  x-ray)  was  accelerated  in  the
SAFHS-treated group as compared with the placebo-treated  group by approximately
38%. The SAFHS-treated tibia fractures healed in an average of 96 days, compared
<PAGE>
with an average of 154 days in the placebo-treated  fractures. The SAFHS-treated
distal radius fractures  healed in 61 days on average,  compared with 98 days on
average for the placebo-treated  fractures. In addition, healing was accelerated
in all healing stages of the SAFHS-treated  fracture in both types of bone. When
the patients were categorized by age (30 years old or under and over 30 years in
the  tibia  study,  and 49 years  old or under  and over 49 years in the  distal
radius study), there was a significantly  greater acceleration of healing in the
older-patient  populations.  The older SAFHS-treated patients in the tibia study
healed in an  average of 102 days,  compared  with an average of 187 days in the
placebo-treated  patients,  and the older  SAFHS-treated  patients in the distal
radius  study healed in an average of 62 days,  compared  with an average of 102
days in the placebo-treated patients.

         Typically the fracture site in distal radius fractures is significantly
crushed.  When the bone is restored to its normal length and anatomical position
to be set in a cast for healing,  there is often a gap in the crushed-bone area.
The presence of this gap makes it difficult to maintain this  restored  position
throughout  the healing  process,  even though the arm is immobilized in a cast.
During the healing  process,  the fractured  bone end  frequently  shifts out of
proper alignment, commonly resulting in physical deformity and compromised wrist
function. The loss of alignment in patients with the SAFHS-treated distal radius
fractures was on average  approximately  60% less than that  experienced  by the
placebo-treated fractures.

         The clinical  results  demonstrated  that the SAFHS  device  produced a
statistically  significant and clinically meaningful  acceleration of all stages
of  healing in fresh bone  fractures  of both the tibia  (which is an example of
cortical  bone) and the distal radius  (which is an example of cancellous  bone)
within the approved  indications for SAFHS. No contraindications or side effects
were identified in the clinical trials.

Sales and Marketing

         The  Company's  marketing  strategy  is to  gain  broad  physician  and
third-party  payor  acceptance of the SAFHS device worldwide within the approved
indications.  A critical  element of this  strategy is to utilize the results of
the SAFHS clinical  trials to  demonstrate  the safety and efficacy of the SAFHS
treatment to both physicians and  third-party  payors.  The Company's  marketing
efforts are currently focused on orthopaedic surgeons in academic  institutions,
trauma centers,  and community-based  practices.  Through its direct sales force
and reimbursement  specialists,  the Company is working closely with orthopaedic
surgeons and other  physicians,  including primary care physicians who represent
third-party  payors.  Once a  prescription  is received  by the  Company  from a
physician, the SAFHS device is shipped by the Company to the physician's office,
either directly or through the Company's sales representatives.

United States

         SAFHS.  The Company has a nationwide  network of independent and direct
sales  representatives  in the United States. At September 30, 1997, the Company
had  17  employees  in  its  direct  sales  organization  and a  network  of 185
independent sales  representatives  throughout the United States.  The Company's
sales  efforts are focused on educating  physicians  and  third-party  payors in
major  metropolitan  areas  on the  benefits  of the  SAFHS  technology  for its
approved  indications.  The Company  believes that these efforts will enable the
Company's sales representatives to better achieve nationwide market penetration.
A primary  focus of the  Company's  marketing  efforts is national  and regional
managed care and workers' compensation organizations, with coordinated marketing
through the Company's sales force and reimbursement specialists.
<PAGE>
         Other  Products.  In January 1997, the Company entered into a sales and
distribution  agreement with FLA Orthopedics,  Inc. ("FLA") and Clinitex Medical
Corporation  ("Clinitex"),  a wholly owned subsidiary of FLA, to market and sell
in the United States Clinitex's  nonfiberglass  synthetic casting materials used
in fracture immobilization.  The Company paid FLA $200,000 upon the execution of
the  agreement.  To date,  sales by the Company of Clinitex  products  have been
minimal.  The  Company  has  decided  not to pay FLA the  $150,000  required  to
continue  marketing  and  selling the Clintex  products in fiscal  1998,  and to
consequently terminate the agreement.

International

         The Company  established  a wholly  owned German  subsidiary  in fiscal
1995,  and in fiscal  1996  introduced  the SAFHS  device in Germany and Austria
through the subsidiary's  network of independent  sales agents.  In fiscal 1997,
the Company expanded its sales into Holland, Denmark, and the United Kingdom. In
other  European  countries,  the Company is selecting  and training  independent
distributors and agents. The Company is sponsoring  clinical trials in Europe to
augment  clinical  data  from the  United  States,  with  the goal of  achieving
acceptance by surgeons and governmental- and  private-insurance  payors in these
markets.  During  fiscal  1997,  the Company  filed  applications  for  national
reimbursement coverage for its SAFHS device in Germany and France.

         In November 1995, the Company signed development agreements with Teijin
Limited, a Japanese  corporation,  for two of the Company's products,  the SAFHS
device  and the  mechanical-stress  device.  The SAFHS  agreement  provides  for
milestone  payments to the Company for Teijin's  development  of the product for
commercial  launch in Japan.  The  Company  will  manufacture  and supply  SAFHS
devices to Teijin for clinical trials and subsequent  sales in Japan.  Teijin is
responsible for complying with the regulatory requirements and for marketing and
distributing  the SAFHS device in Japan.  In May 1997,  Teijin  received  import
approval  to market  the SAFHS  Model 2A in Japan,  and in August  1997,  Teijin
submitted an application for reimbursement from the Japanese Ministry of Health.
The development agreement with Teijin for the mechanical-stress  device provides
for milestone payments to the Company that will support,  in part, the Company's
clinical  trials in the United States in exchange for a first option in favor of
Teijin to negotiate a development and distribution agreement for this device for
the Japanese market.

         No assurance  can be given that the Company will receive  reimbursement
approvals in any country,  or that its  partners,  distributors,  and agents can
successfully  introduce the SAFHS device in Europe or Japan on terms  acceptable
to the Company,  or at all.  Future  foreign  sales,  if any, will be subject to
certain risks,  including  exchange rate  fluctuations,  international  monetary
conditions,  tariffs, import licenses, trade policies,  domestic and foreign tax
policies, foreign regulations, and reimbursement approvals.

         For further  information on international  operations,  see Footnote 5,
"Geographic  Segment  Information,"  of the  Consolidated  Financial  Statements
included herein.
<PAGE>
Third-Party Reimbursement

         Prior  to  approving  coverage  for  a  new  medical  technology,  most
third-party  payors require  evidence that the technology is safe and effective,
not experimental or investigational, and medically necessary and appropriate for
the specific patient.  Third-party  payors typically require that the technology
has received FDA approval or clearance for marketing. New technologies are often
prescribed for off-label  applications,  for which  reimbursement by third-party
payors  may not be  available.  Increasing  numbers  of  third-party  payors and
managed care plans are beginning to require evidence that the technology is cost
effective.

         In the United States,  the Company has commenced a multi-level  program
to obtain  coverage  and  reimbursement  from  third-party  payors for the SAFHS
device as a new treatment modality. (The SAFHS device is typically classified by
third-party payors as Durable Medical  Equipment.)  Although the Company has not
received  broad  approval  from any  reimbursement  authority for payment of the
SAFHS  device,  it has received  approval from various  third-party  payors on a
case-by-case  basis.  As of October 31, 1997,  the Company has been paid by over
800 third-party  payors including (i) traditional  indemnity  insurers including
Blue Shield organizations,  (ii) workers' compensation  insurers,  (iii) HMO and
managed  care  organizations,  (iv)  automobile  insurers,  and (v)  third-party
administrators.  The Company believes that case-by-case  reimbursement  approval
will continue to be the predominant  method of obtaining  pre-authorization  and
reimbursement  for the  SAFHS  device  until  payor  coverage  at the  national,
regional,  or local  level is  obtained.  The  Company is  seeking to  establish
separate  reimbursement  codes  for the  SAFHS  device  with  various  payors to
expedite reimbursement processing for the SAFHS device; however no assurance can
be given that such codes will be assigned on a timely basis, or at all.

        
         Currently,  the Health Care Financing  Administration  ("HCFA"),  which
administers the Medicare program,  has a national coverage policy for electrical
stimulation  devices  that  initiate the healing of  non-union  fractures.  Such
devices are  reimbursed  under a fee  schedule  in which the range of  allowable
reimbursement is $2,800 to $2,950 per treatment regimen.  In August 1996, HCFA's
Technology  Advisory Committee  recommended that the SAFHS device not be covered
under the Medicare program. The Company,  however,  continues to pursue coverage
for SAFHS by providing additional information to the HCFA staff. In the interim,
the  Company is not  shipping  orders to patients  covered  under  Medicare.  No
assurance can be given that the Company will be successful in obtaining coverage
for the SAFHS device under the Medicare program.

         During  1995,  the  Company  submitted  clinical   information  to  the
Technology  Evaluation  Center  ("TEC")  of  the  Blue  Cross  and  Blue  Shield
Association  ("BCBSA")  requesting that the TEC evaluate the SAFHS therapy.  The
TEC  program   distributes  the  results  of  its  evaluation  to  BCBSA  member
organizations and to third-party payors and others who purchase TEC assessments,
and such  evaluations are often used by payors in setting their own coverage and
reimbursement  policies.  In August 1995,  the TEC  completed  its review with a
favorable  assessment of the SAFHS therapy, and has disseminated this evaluation
to its subscribers.

         In addition to Medicare and Blue Cross and Blue Shield,  the  Company's
reimbursement  specialists are focused on obtaining  coverage and  reimbursement
from major  national  and  regional  managed care  organizations  and  insurance
carriers   throughout  the  United  States.   Most  of  the  third-party   payor
<PAGE>
organizations  independently  evaluate new treatment modalities by reviewing the
published  literature and/or the Medicare  coverage and reimbursement  policy on
the  specific  treatment  modality.  To assist the  third-party  payors in their
respective  evaluations of the SAFHS device, the Company provides scientific and
clinical data that support the safety and effectiveness of the device.

         When a  prescribing  physician  submits  a  prescription  for the SAFHS
device to the  Company,  he or she must also  submit to the  Company a letter of
medical necessity and the required  paperwork for submission of the claim to the
applicable  third-party  payor.  The Company ships the device to the  physician,
either directly or through the Company's sales  representatives,  generally only
after  obtaining  prior  reimbursement   approval  from  the  payor,  when  such
precertification is available. The Company charges a flat fee for the use of the
SAFHS device, regardless of the length of treatment. The Company's reimbursement
personnel work closely with third-party payors on a case-by-case basis.

         The Company's  international  reimbursement plan varies by country.  In
Germany,  Holland,  and France, the Company is using indigenous clinical data as
well as data  collected in the United States on the  effectiveness  of the SAFHS
device to support the Company's  filings for reimbursement  coverage.  In Japan,
Teijin has submitted an application for reimbursement from the Japanese National
Health Insurance Bureau.  These countries may have more stringent  reimbursement
requirements  than the United  States,  and the  Company  currently  has limited
experience in obtaining  reimbursement  for its products in countries other than
the United States.

         As of September  30, 1997,  the  international  accounts  receivable is
primarily derived from sales in Germany,  where the Company has received limited
local  reimbursement  on a  case-by-case  basis.  To assist  the  collection  of
outstanding  claims and to expedite the reimbursement  process on future claims,
the Company is seeking  nationwide  approval by the National  Krankenkasse,  the
German governing  organization that establishes medical reimbursement policy for
health-care  providers.  To this end,  in August  1997 the  Company  submitted a
formal  application  to  the  National  Krankenkasse.  The  application  process
includes a scientific assessment and a reimbursement assessment;  the Company is
currently in the  scientific-assessment  phase. In the interim,  the Company has
elected to sell SAFHS devices in Germany only when reimbursement is preapproved.

         There  can  be no  assurance  that  sufficient  reimbursement  for  the
Company's products will be available,  or that future reimbursement  policies of
payors will not adversely affect the Company's ability to sell its products on a
profitable basis, or at all. The United States Congress is currently considering
various  proposals to significantly  reduce Medicare and Medicaid  expenditures.
The Company cannot predict which, if any, of these proposals will be enacted and
if  enacted,  what  effect,  if any,  they may have on the  Company's  business.
Failure either in the United States or abroad by the Company to obtain favorable
coverage determinations or sufficient  reimbursement from Medicare or from other
third-party  payors, or adverse changes in governmental and private  third-party
payors' policies toward  reimbursement for the Company's products,  would have a
material adverse effect on the Company's business,  financial condition, results
of operations, and cash flows.

Manufacturing

         The  SAFHS  2000  is  manufactured  by the  Company  and by a  contract
manufacturer.  The Company also  refurbishes the SAFHS Model 2A at its facility.
<PAGE>
The agreement between the Company and the contract manufacturer is documented by
specific purchase orders, effective into 1999, covering a portion of anticipated
requirements.   This  contract   manufacturer   also  performs   certain  design
engineering  for the  Company.  Both the  Company's  facility  and its  contract
manufacturer's  facility have been  inspected by the FDA for Good  Manufacturing
Practices ("GMP") and have been found to be in compliance with GMP requirements.
In August 1996, the Company  received ISO 9003  (International  Organization  of
Standardization) Certification and CE Mark Certification for the Company's SAFHS
Model 2A. The CE Mark  signifies  that the Company  conforms  with the  European
Community  Medical Device  Directive.  The Company  believes that its Piscataway
facility  will  have  sufficient  capacity  to meet  the  Company's  anticipated
manufacturing  needs for at least  the next  three  years.  Any  failure  by the
Company or the contract  manufacturer  to maintain its respective  manufacturing
facility in accordance with GMP or CE requirements could result in the inability
to  manufacture  the SAFHS  device,  and could  limit the  Company's  ability to
deliver the SAFHS device to physicians and patients, which would have a material
adverse  effect on the  Company's  business,  financial  condition,  results  of
operations, and cash flows.

         The manufacture of the SAFHS device involves an assembly process with a
number of  significant  components.  Each  device is tested and  released by the
Company in accordance  with FDA  requirements.  Most  purchased  components  are
available from more than one vendor.  However,  certain components currently are
and will continue to be manufactured by  single-source  vendors.  For certain of
these components,  there are relatively few alternative  sources of supply,  and
establishing  additional or replacement  suppliers for such components cannot be
accomplished  quickly.  Although  the Company is  continually  in the process of
identifying primary and alternative  vendors, the qualification of additional or
replacement vendors for certain components or services is a lengthy process. Any
supply  interruption  from  single-source  vendors would have a material adverse
effect on the Company's business,  financial  condition,  results of operations,
and cash flows.

Research and Development

         The Company's principal research and development program relates to the
development  and  clinical  trials of the  Company's  mechanical-stress  device.
Additionally,  the Company has ongoing programs to develop new devices utilizing
its  SAFHS  technology  and to expand  SAFHS  applications  to other  fractures,
lower-back spine fusion,  and cartilage  repair.  No assurance can be given that
the SAFHS treatment will prove to be safe and  efficacious for other  fractures,
spine  fusion,  or  cartilage  repair or that any PMA, if applied  for,  will be
granted by the FDA on a timely basis, or at all.

         The  Company  is  evaluating  the use of  ultrasound  in a  variety  of
orthopaedic  applications.  The Company is providing  SAFHS devices to physician
investigators  for  preliminary  clinical  studies in the use of ultrasound  for
healing stress  fractures,  limb lengthening  using an external fixation device,
and healing  internally fixed fractures.  The Company is supporting  preclinical
studies on the treatment of lower-back spine fusion and on cartilage repair. The
Company also sponsors  research  relating to the basic science of ultrasound for
both therapeutic as well as diagnostic use.

         As of November  30,  1997,  the Company  had six  employees  engaged in
research and development and regulatory  affairs and eight employees  engaged in
engineering.  The Company's  expenditures  for research and  development  (which
includes   clinical  trials,   regulatory   affairs,   and   engineering)   were
approximately $3.1 million, $4.0 million, and $2.5 million in fiscal 1997, 1996,
and 1995, respectively.
<PAGE>
Patents, Copyrights and Proprietary Information

         The Company's  policy is to protect its proprietary  position by, among
other  things,  filing both United  States and foreign  patent  applications  to
protect its owned and licensed technology, inventions, and improvements that are
important to the  development of its business.  The Company holds title to eight
issued United States patents,  one issued foreign  (Canadian) patent, 12 pending
United States patent  applications,  and corresponding Patent Cooperation Treaty
("PCT") and foreign patent  applications  relating to its SAFHS technology.  The
original  United States  ultrasound  patent (the  "Initial  Patent") that is the
basis of the SAFHS  device  was set to expire  in 2002,  but has been  granted a
five-year  extension  to 2007 based on the  delays in  marketing  the  invention
caused by extensive  regulatory review. The other currently issued United States
patents relating to SAFHS technology are set to expire between 2008 and 2014.

         The Company is also the exclusive licensee of four issued United States
patents,  two issued foreign patents,  and four pending foreign patents relating
to the use and application of mechanical-stress technology. The currently issued
United States patents relating to mechanical-stress technology are currently set
to expire  between  2010 and 2011.  All of the patents  and patent  applications
relating  to  mechanical-stress  technology  that the  Company  does not own are
licensed  exclusively  to the  Company  worldwide  until  the  later  of (i) the
expiration of the final patent  licensed to the Company or (ii) March 2022.  The
license agreement generally provides for the payment of royalties on the sale of
products utilizing the patented technology,  and the Company's exclusive license
may  revert to a  nonexclusive  license if the  Company  fails to use good faith
efforts to commercially exploit the patented technology.

         The  Company  intends  to file  or  cause  to be  filed  on its  behalf
additional  United  States,   foreign,  and  international  patent  applications
relating to new  developments  or  improvements  in SAFHS and  mechanical-stress
technology and to specific products it develops. While no assurance can be given
that the patent applications owned by the Company will issue as patents, or that
they will provide the Company with significant  protection  against  competitive
products or otherwise be  commercially  valuable,  the Company is unaware of any
facts that could  preclude the grant of a patent from each of the pending patent
applications.  There can be no assurance  that any issued  patents  owned by the
Company will provide  competitive  advantages for the Company's products or will
not be challenged or designed around by its competitors.

         The Company  believes  it owns or has the right to use all  proprietary
technology necessary to manufacture and market its products.  Under current law,
patent applications in the United States are maintained in secrecy until patents
issue,  and patent  applications in foreign  countries are maintained in secrecy
for a period after filing.  The right to a device patent in the United States is
attributable to the first to invent the device,  rather than the first to file a
patent  application,  while in  foreign  countries,  ownership  of a  patent  is
typically determined by priority of patent filing, not invention.  Consequently,
the Company cannot be certain that it was the first to invent certain technology
covered by pending patent  applications  or that it was the first to file patent
applications for such inventions.  In addition,  the patent positions of medical
device companies, including the Company, are generally uncertain, partly because
the positions involve complex legal and factual questions.  Moreover, patent law
relating to certain of the Company's fields of interest,  particularly as to the
scope of claims in issued patents,  is still  developing,  and it is unclear how
this uncertainty will affect the Company's patent rights.
<PAGE>
         The Company has not received any notices alleging, and is not aware of,
any infringement by the Company of any other entity's patents.  However, because
of the  volume of  patents  issued and patent  applications  filed  relating  to
medical  devices,   there  can  be  no  assurance  that  current  and  potential
competitors  and other  third  parties  have not filed or in the future will not
file  applications  for, or have not received or in the future will not receive,
patents and will obtain additional  proprietary  rights relating to materials or
processes used or proposed to be used by the Company. Accordingly,  there can be
no  assurance  that the  Company's  products  do not  infringe  any  patents  or
proprietary rights of third parties.

         The Company also relies upon trade  secrets,  technical  know-how,  and
continuing  technological  innovation  to develop and maintain  its  competitive
position.  The  Company  typically  requires  its  employees,  consultants,  and
advisors to execute  appropriate  confidentiality  agreements in connection with
their employment,  consultation, or advisory relationships with the Company. The
Company also typically requires its employees, consultants, and certain advisors
to agree to disclose  and assign to the Company all  inventions  conceived of on
Company time, using Company  property or that relate to the Company's  business.
There  can  be  no  assurance,  however,  that  the  foregoing  agreements  will
effectively  prevent  disclosure of the Company's  confidential  information  or
provide  meaningful  protection  for the Company's  confidential  information if
there is unauthorized use or disclosure.  Furthermore, no assurance can be given
that  competitors  will  not  independently  develop  substantially   equivalent
proprietary information and techniques or otherwise gain access to the Company's
proprietary technology,  or that the Company can meaningfully protect its rights
in unpatented proprietary technology.

         The Company  also holds  rights to  copyrights  on text and on software
developed by or for itself for use in its SAFHS device.  The Company  intends to
file copyright  registrations for such software.  There can be no assurance that
any copyrights owned by the Company will provide competitive  advantages for the
Company's products or will not be challenged or circumvented by its competitors.

         The  Company's  owned  and  licensed  patents  and  copyrights  and its
products may, in the future, be subject to litigation regarding patent and other
intellectual  property  rights.  In  the  event  that  any  relevant  claims  of
third-party  patents are upheld as valid and  enforceable,  the Company could be
prevented from  practicing the subject matter claimed in such patents,  or would
be required to obtain licenses from the patent owners of each of such patents or
to redesign its products or  processes  to avoid  infringement.  There can be no
assurance  that such licenses  would be available or, if available,  would be on
terms  acceptable  to the Company or that the Company would be successful in any
attempt to  redesign  its  products  or  processes  to avoid  infringement.  The
Company's  failure to obtain these  licenses or to redesign  its products  would
have a material adverse effect on the Company's business,  financial  condition,
results of operations, and cash flows. In addition,  litigation may be necessary
to defend  against  claims of  infringement,  to enforce  patents and copyrights
issued or  licensed  to the  Company,  or to protect  trade  secrets,  and could
require significant  diversion of management's  attention and the expenditure of
financial resources, which could have a material adverse effect on the Company.

Government Regulation

         The Company's  existing  products are regulated in the United States as
medical devices by the FDA under the Federal Food,  Drug, and Cosmetic Act ("FDC
<PAGE>
Act") and require the  approval of a PMA by the FDA prior to  commercialization.
Noncompliance  with  applicable  requirements  can  result  in  failure  of  the
government  to grant  pre-market  approval for devices,  withdrawal  of the PMA,
total or partial suspension of production, fines, injunctions,  civil penalties,
recall or seizure of products, and criminal prosecution.

         In the United States, medical devices are classified into three classes
(I, II, or III) on the basis of the  controls  necessary  to  reasonably  assure
their safety and  effectiveness.  The Company's existing products are classified
as Class III devices,  the class  subject to the highest  level of regulation by
the  FDA.  In  addition  to the  general  control  requirements  of the  FDC Act
(including registration,  labeling,  pre-market  notification,  and adherence to
GMP), the Company's products are also subject to pre-market approval.

         Before a new Class III device can be  introduced  into the market,  the
manufacturer  must  obtain FDA  clearance  through a PMA  application.  The less
burdensome  510(k)  pre-market  notification  process  has not been,  and is not
expected to be, available for any of the Company's  products.  Accordingly,  the
Company has had to obtain,  and expects to apply for,  PMAs and PMA  supplements
for its future products.

         A PMA  application  must be  supported  by  extensive  data,  including
preclinical  and clinical trial data, to demonstrate  the safety and efficacy of
the device for the indicated  uses  specified in the PMA  application.  If human
clinical  trials of a device are required and the device presents a "significant
risk," the  manufacturer  or the  distributor of the device must file an IDE and
have an approved application prior to commencing human clinical trials.

         The IDE application must be supported by data,  typically including the
results of animal and laboratory  testing.  If the IDE  application is approved,
human clinical  trials may begin at a specific number of  investigational  sites
with a specified maximum number of patients, as approved by the FDA. Sponsors of
clinical trials are permitted to sell those devices distributed in the course of
study  as  long as  compensation  does  not  exceed  recovery  of the  costs  of
manufacturing, researching, developing, and handling.

         Upon  receipt  of the  PMA  application,  the  FDA  makes  a  threshold
determination as to whether the application is sufficiently complete to permit a
substantive   review.  If  the  FDA  determines  that  the  PMA  application  is
sufficiently  complete to permit a substantive  review,  the FDA will "file" the
application.  An FDA review of a PMA application  generally takes between two to
three  years  from  the  date  the  PMA  application  is  filed,  but  may  take
significantly  longer.  The  review  time is  often  significantly  extended  by
requests  from the FDA for more  information  or  clarification  of  information
already  provided  in the  submission.  During the review  period,  an  advisory
committee,  including clinicians, will likely be convened to review and evaluate
the application and provide  recommendations to the FDA as to whether the device
should be approved. In addition, the FDA will inspect the manufacturing facility
to ensure compliance with the FDA's GMP requirements  prior to approval of a PMA
application.

         The PMA process can be expensive,  lengthy, and uncertain. There can be
no  assurance  that the  Company  will be able to  obtain  necessary  regulatory
approvals.  The loss of previously received approvals, or failure to comply with
existing or future regulatory requirements, would have a material adverse effect
on the Company's business,  financial condition, results of operations, and cash
flows.
<PAGE>
         The PMA  application  for use of the  SAFHS  Model 2A to treat  certain
fresh  fractures of the tibia and distal radius was filed in July 1990,  and the
FDA's  approval  for  commercial  marketing by the Company was issued in October
1994. The promotion by the Company of the SAFHS Model 2A to treat  fractures not
covered by the initial PMA will require the submission of PMA supplements or new
PMA applications.  PMA supplements often require  submission of the same type of
information  as in a PMA  application,  except that the supplement is limited to
information  intended  to support any  changes  from the product  covered by the
original PMA and to support the treatment of new clinical  indications,  and may
not require the submission of as extensive clinical data or the convening of any
advisory committees.  In addition,  PMA supplements must be submitted to the FDA
before  making any change  that may  affect the safety or  effectiveness  of the
device.  These  changes  can  include  changes  in device  design,  composition,
specifications,  circuitry,  software,  or energy  source.  The Company has made
certain  nonperformance-related  changes to the SAFHS  Model 2A since the device
was  approved by the FDA.  Although  the Company  believes  such  changes do not
require the filing of a PMA  supplement and prior approval by the FDA, there can
be no  assurance  that  the FDA  will  not  require  the  Company  to file a PMA
supplement,  which would result in additional  costs and delays in marketing the
device.  A PMA  supplement  must also be submitted  when  unanticipated  adverse
effects,  increases in the incidence of anticipated  adverse effects,  or device
failures necessitate a label, manufacture,  or device modification.  The Company
filed a PMA  supplement  for its SAFHS 2000 in December 1995, and in March 1997,
the FDA approved this supplement.  In May 1997, the Company commenced commercial
distribution  of the SAFHS 2000 in the United  States.  The Company will also be
required to file a PMA application for its mechanical-stress device, if and when
development is completed. No assurance can be given that any supplements will be
filed or  approved,  or that new PMAs will be granted on a timely  basis,  or at
all.  Delays in  receipt  or failure  to  receive  such  approvals  would have a
material adverse effect on the Company's business,  financial condition, results
of operations, and cash flows.

         Any products  manufactured or distributed by the Company pursuant to an
approved  PMA are subject to  pervasive  and  continuous  regulation  by the FDA
including record-keeping requirements,  reporting of adverse experience with the
use of the device,  post-market  surveillance,  post-market registry,  and other
actions  as  deemed  necessary  by  the  FDA.  Product  labeling  and  promoting
activities are subject to scrutiny by the FDA and, in certain instances,  by the
Federal Trade Commission. Products may be promoted by the Company and any of its
agents only for the products'  approved  indications.  No assurance can be given
that the FDA will not impose  modifications to the labeling that could adversely
affect the Company's  ability to market,  sell,  or be reimbursed  for the SAFHS
device. In addition,  there can be no assurance that the Company will not become
subject to FDA actions as a result of physicians'  prescribing  the SAFHS device
for off-label uses.

         Product   approvals  may  be  withdrawn  for  failure  to  comply  with
regulatory  standards or the occurrence of unforeseen problems following initial
marketing.  The FDC Act  requires  the  Company's  products be  manufactured  in
registered establishments and in accordance with GMP regulations.  The Company's
SAFHS device is  manufactured by the Company and a contract  manufacturer.  Both
facilities have been inspected by the FDA and are the only  facilities  approved
for the  production  of the SAFHS  device.  Any  failure  by the  Company or the
contract manufacturer to maintain its respective facility in accordance with FDA
GMP  requirements  could result in the inability to manufacture the SAFHS device
and may limit the  Company's  ability to deliver the SAFHS device to  physicians
and  patients,  which  would have a  material  adverse  effect on the  Company's
business, financial condition, results of operations, and cash flows.
<PAGE>
         The Company also is subject to numerous federal,  state, and local laws
relating to such matters as safe working  conditions,  manufacturing  practices,
environmental  protection,  fire hazard  control,  and  disposal of hazardous or
potentially  hazardous  substances.  There can be no assurance  that the Company
will not be  required  to incur  significant  costs to comply with such laws and
regulations  in the  future,  or that such laws or  regulations  will not have a
material  adverse  effect  upon the  Company's  business,  financial  condition,
results of operations, or cash flows.

         Sales of  medical  devices  outside  the United  States are  subject to
foreign  regulatory  requirements that vary widely from country to country.  The
time required to obtain  approval by a foreign  country may be longer or shorter
than that required for FDA approval,  and the  requirements  may differ.  Export
sales of investigational  devices that have not received FDA marketing clearance
generally  are  subject  to FDA export  permit  requirements.  To obtain  such a
permit,  the Company  must provide the FDA with  documentation  from the medical
device  regulatory  authority of the country in which the  purchaser is located,
stating that the sale of the device is not a violation of that country's medical
device  laws,  and must  demonstrate  to the FDA that export is not  contrary to
public health. No assurance can be given that such foreign regulatory  approvals
will be granted on a timely basis, or at all.

         During  1996,  the Company  received  regulatory  approval of the SAFHS
Model 2A in Germany.  Under  German law,  medical  devices must have a "GS" mark
affixed to the product  labeling.  The GS mark,  which the  Company  received in
December 1995, denotes that the product meets certain safety standards. In 1996,
the Company also received the "CE" (Medical Device Directive) mark for the SAFHS
Model  2A.  The CE mark is  recognized  by  countries  that are  members  of the
European Union and the European Free Trade Association, and effective June 1998,
will be  required  to be affixed to all  medical  devices  sold in the  European
Union.  No  assurance  can be given that any  products  that the  Company  might
develop or commercialize  will obtain the CE mark, or will be able to obtain any
other required regulatory clearance or approval on a timely basis, or at all.

Competition

         The medical device industry is  characterized  by intense  competition.
Many of the Company's  existing and  potential  competitors  have  substantially
greater financial,  marketing, sales, distribution, and technical resources than
the Company and more experience in research and  development,  clinical  trials,
regulatory matters,  manufacturing,  and marketing.  In addition,  most of these
companies  have  established  third-party   reimbursement  for  their  products.
Furthermore,  the medical  device  industry is  characterized  by rapid  product
development and technological  change.  The Company's products could be rendered
obsolete  or  uneconomical  by  technological  advances  by one or  more  of the
Company's  competitors or by other  therapies such as drugs to treat  conditions
addressed  by  the  Company's  products.   The  Company's  business,   financial
condition, results of operations, and cash flows will depend upon its ability to
remain competitive with other developers of such medical devices and therapies.

         The SAFHS device  competes  with  non-invasive  bone growth  electrical
stimulation  devices  and  with  various  surgical  treatments.   The  Company's
mechanical-stress  device to  prevent  bone loss  related  to  osteoporosis,  if
developed and marketed,  will compete with drug therapies and exercise regimens.
Four companies currently market electrical stimulation devices for the treatment
of non-union fractures.  The Company believes at least one of these companies is
<PAGE>
conducting  clinical  trials  for  the  use of  electrical  stimulation  for the
treatment of fresh  fractures.  In addition,  other  companies are  developing a
variety of products and  technologies  to be used in the  treatment of fractures
and  osteoporosis,   including  growth  factors,  bone  graft  substitutes,  and
exercise/physical therapy equipment.  There can be no assurance that competitors
will not develop products that are superior to the Company's  products,  achieve
greater  market  acceptance,  or render the  Company's  technology  and products
obsolete or noncompetitive.  As a result, the Company's  long-term viability may
depend on  whether it can  continue  to develop  new  products.  There can be no
assurance that the Company will be able to compete  successfully against current
or future  competitors  or that  competition  will not have a  material  adverse
effect on the Company's business, financial condition, results of operations, or
cash flows.

Product Liability and Insurance

         The  Company  faces an  inherent  business  risk of exposure to product
liability  claims in the event  that the use of its  product  is alleged to have
resulted in adverse effects.  The Company maintains product liability  insurance
with coverage of $3 million per occurrence and an annual aggregate maximum of $3
million.  In  addition,  the Company  maintains  umbrella  liability  insurance,
including  product  liability  coverage,  of $10 million per  occurrence  and an
annual  aggregate  maximum  of  $10  million.  There  can be no  assurance  that
liability  claims will not exceed the coverage  limits of such  policies or that
such insurance will continue to be available on commercially  acceptable  terms,
or at all. Consequently,  product liability claims could have a material adverse
effect on the Company's business,  financial  condition,  results of operations,
and cash flows.

Employees

         As of November 30, 1997, the Company had 75 employees, consisting of 24
in sales and marketing, eight in engineering,  14 in finance and administration,
five in quality  assurance,  10 in reimbursement  and customer  service,  six in
research and development and regulatory affairs,  and eight in manufacturing and
shipping.  The Company  believes  that the success of its business  depends,  in
part,  on its ability to attract  and retain  qualified  personnel.  None of the
Company's  employees is covered by a  collective  bargaining  agreement.  Exogen
believes that it maintains good relations with its employees.

Item 2.  Properties

         The Company  leases  approximately  32,000 square feet of a facility in
Piscataway,  New Jersey.  This leased space contains  approximately 9,000 square
feet of  manufacturing  space and 23,000  square feet  devoted to  research  and
development,  marketing,  and  administration.  This facility is leased  through
October 2001, and the Company has an option for a five-year renewal term. Exogen
believes  its  facility  is  adequate  to  meet  its  anticipated   real  estate
requirements for the next three years.

Item 3.  Legal  Proceedings

         On April 4, 1995, a former  consultant to  Interpore,  the company from
which  Exogen  purchased  certain  SAFHS  ultrasound  assets,  filed a complaint
against  Interpore  and  Exogen  in the  United  States  District  Court for the
Southern  District of New York,  claiming the right,  pursuant to the terms of a
consulting  agreement  between such  consultant and the  predecessor  company to
<PAGE>
Interpore,  to  certain  royalties,  not  exceeding  1.25%  of the net  revenues
generated from the sale of SAFHS devices.  On June 5, 1995,  Exogen answered the
complaint,  denied that it has any liability to the  consultant,  and asserted a
number of specific  defenses.  On the same day, Interpore did the same, and also
asserted  cross-claims  against Exogen,  claiming that any royalties found to be
due to the consultant  should be paid by Exogen and that Exogen should be liable
for Interpore's  attorneys' fees and other costs incurred in the litigation.  On
July 7, 1995, Exogen answered Interpore's  cross-claims,  denied that it has any
liability  to the  consultant  or to  Interpore,  asserted a number of  specific
defenses to Interpore's claims, and asserted cross-claims against Interpore that
any royalties found to be due to the consultant  should be paid by Interpore and
that Interpore be liable for Exogen's  attorneys'  fees and other costs incurred
in the  litigation.  Exogen and  Interpore  since have agreed that (i)  Exogen's
counsel will assume the status of lead defense counsel in the  litigation;  (ii)
any adverse  judgment  entered in the litigation  will be entered against Exogen
and Interpore jointly and severally;  and (iii) Exogen will indemnify  Interpore
for any payments  that are required to be made to the  consultant as a result of
the  litigation,  and Exogen and Interpore  thereafter  will resolve  separately
their respective liabilities. As a result of the foregoing, in March 1996 Exogen
and  Interpore  dismissed  their claims  against each other in this  litigation,
without  prejudice to their right to resolve them,  if  necessary,  as described
above. The Company does not believe that the consultant's claims have merit, and
together with  Interpore,  is vigorously  defending  this action.  The discovery
process has been completed, and the Company anticipates making a motion that the
Court enter a judgment in favor of the  Company  and  Interpore  and against the
consultant. There can be no assurance,  however, that the motion will be granted
or that the consultant's claims will not be upheld.

         On March 15, 1995, a former sales representative of the Company filed a
complaint  against  the  Company in the  United  States  District  Court for the
District of New Jersey that alleged breach of the sales representative agreement
and  sought  damages  as a result of the  termination  of the  agreement  by the
Company.  In March  1996,  the Company  settled  this  matter,  and the case was
dismissed with prejudice and without costs.

         In March 1997, the Company received a demand from Pilla Consulting,
Inc. and Arthur A. Pilla  (collectively,  "Pilla") for  royalties  allegedly due
pursuant to a consulting  agreement between Pilla Consulting and the predecessor
company to Interpore.  Pilla claims entitlement to royalties of 1.25% of the net
revenues generated from the sale of SAFHS devices.  The Company does not believe
that Pilla's claim has any merit. For that reason, on April 2, 1997, the Company
filed a complaint  against  Pilla in the Supreme Court for the State of New York
seeking a judicial  declaration  that the Company is not liable to Pilla for any
royalties.  Pilla  asserted a  counterclaim  against the Company,  seeking to be
awarded the demanded  royalties,  that the Company asked the Court to dismiss on
the  grounds  that Pilla  failed to state a claim  against  the  Company.  Pilla
subsequently asked the Court for permission to replead the counterclaim, and the
Company has opposed this motion on the grounds that the amended claim also fails
to state a claim  against the Company.  These  motions are pending.  The Company
intends to aggressively pursue the action against Pilla and to
vigorously defend against any counterclaim(s) by Pilla seeking said royalties or
equivalent payments under any legal theory. There can be no assurance,  however,
that Pilla's claim will not be upheld.


Item 4.  Submission of Matters to a Vote of Security Holders

         None.
<PAGE>
Item 4a.  Executive Officers of the Registrant

         The executive officers of the Company are as follows:
<TABLE>
<CAPTION>
    Name                                               Age                             Position
    ----                                               ---                             --------
<S>                                                    <C>   <C>
John P. Ryaby.......................................   63    Chairman of the Board of Directors and Vice President of
                                                             Research and Development and Regulatory Affairs
Patrick A. McBrayer.................................   46    Chief Executive Officer, President, and Director
Richard H. Reisner..................................   54    Vice President, Chief Financial Officer, and Secretary
Roger J. Talish.....................................   55    Vice President of Operations
- ---------
</TABLE>

         John P.  Ryaby,  a founder of the  Company,  has been a Director of the
Company since March 1992 and Chairman of the Board of Directors  since  February
1994. Mr. Ryaby served as President and Chief  Executive  Officer of the Company
from March 1992 to February 1994, and currently  serves as the Vice President of
Research and Development and Regulatory Affairs. Mr. Ryaby served from late 1989
until 1992 as the President and Chief Operating Officer of Interpore, a division
of Interpore  International,  Inc., a physical and biological  research company.
Mr. Ryaby was a founder, and from 1975 to 1982 was President and Chief Operating
Officer,  of  Electro-Biology,  Inc. ("EBI"),  a company involved in bone-growth
electrical-stimulation  technology, and was responsible for obtaining regulatory
approval of EBI's PMA in 1979 and for establishing EBI's direct sales force.

         Patrick A. McBrayer was named Chief Executive Officer, President, and a
Director of the  Company in February  1994.  Prior to joining the  Company,  Mr.
McBrayer  served in various  executive  positions  from 1987 to February 1994 at
Osteotech,  Inc.,  including  President and Chief  Executive  Officer.  While at
Osteotech, Inc., a company that develops and markets biologic,  biomaterial, and
implant systems for musculoskeletal  surgery,  Mr. McBrayer guided the company's
transition  from its  inception to a public  entity.  From 1979 through 1986, he
served in a variety of positions  of  increasing  responsibility  with Johnson &
Johnson,  Inc., including Marketing Manager of the Patient Care Division,  where
he built a significant business in surgical products.

         Richard H.  Reisner,  a founder of the Company,  has served as its Vice
President and Chief  Financial  Officer since September 1992. From 1991 to 1992,
Mr. Reisner was Vice President and Chief Financial Officer of Cirrus Diagnostics
Inc.  ("Cirrus"),  a company  that  developed  a system  for the  automation  of
diagnostic immunoassay and chemistry testing, and was directly involved with the
acquisition of Cirrus by Diagnostic Products  Corporation in May 1992. From 1990
to 1991,  Mr.  Reisner was the  Corporate  Controller  for  Datascope  Corp.,  a
manufacturer  of  medical  instruments.  From  1988 to  1990,  Mr.  Reisner  was
President  and  Chief  Executive  Officer  of Pain  Suppression  Labs,  Inc.,  a
manufacturer  of electrical  stimulation  devices to suppress  chronic  headache
pain.  From  1979 to  1988,  Mr.  Reisner  was Vice  President  of  Finance  and
Administration  of  EBI,  and  was  responsible  for  establishing   third-party
reimbursement for EBI's bone-growth electrical-stimulation devices.

         Roger J. Talish, a founder of the Company, has served as Vice President
of Operations  for the Company since March 1992.  From 1989 to 1992,  Mr. Talish
was Vice  President of Operations  at Interpore,  and from 1985 to 1989 held the
same  position at  Meditron,  Inc.  From 1978 to 1985,  Mr.  Talish held various
engineering  management  positions  at EBI,  including  Director of Research and
Product Engineering.
<PAGE>
                                     PART II


Item 5.  Market for Registrant's Common Equity and Related Stockholder Matters

         The  Company's  Common  Stock has been  quoted on the  Nasdaq  National
Market  under the  trading  symbol  "EXGN"  since the Company  commenced  public
trading on July 20, 1995. Prior to that date, there was no public market for the
Company's Common Stock.

         The  following  table sets forth the high and low selling price for the
Company's  Common Stock for fiscal 1996 and 1997,  based on transaction  data as
reported by the Nasdaq National Market.
<TABLE>
<CAPTION>

          Fiscal years ended
      September 30, 1996 and 1997           High              Low
      ---------------------------           ----              ---
<S>                                        <C>               <C>
      1996
      ----
      First quarter...................     $20.75            $12.75
      Second quarter..................     $25.75            $11.75
      Third quarter...................     $14.00            $ 7.25
      Fourth quarter..................     $ 9.50            $ 3.00

      1997
      ----
      First quarter...................     $ 6.000           $ 3.250
      Second quarter..................     $ 7.625           $ 3.500
      Third quarter...................     $ 5.750           $ 3.375
      Fourth quarter..................     $ 5.625           $ 3.000
</TABLE>

         On November 28, 1997,  the last  reported  sale price for the Company's
Common Stock as reported by the Nasdaq National Market was $3.75 per share.

         As of November 30, 1997, there were approximately 204 holders of record
of the Common Stock. This number excludes individual  stockholders holding stock
under nominee security position listings.

         The  Company  has not  declared  or paid any cash  dividends  since its
inception,  and does not  intend to pay any cash  dividends  in the  foreseeable
future.

The Stockholder Rights Plan

         Effective  December  6, 1996,  pursuant to a  Preferred  Shares  Rights
Agreement  (the  "Rights  Agreement")  between  the Company  and  Registrar  and
Transfer Company,  as Rights Agent (the "Rights Agent"),  the Company's Board of
Directors  declared  a  dividend  of one  right  (a  "Right")  to  purchase  one
one-hundredth  share of the Company's  Series A  Participating  Preferred  Stock
("Series  A  Preferred")  for  each  outstanding  share of  Common  Stock of the
Company.  The dividend is payable on December  19, 1996 (the  "Record  Date") to
stockholders  of record as of the close of  business  on that  date.  Each Right
entitles the registered holder to purchase from the Company one one-hundredth of
a share of Series A  Preferred  at an exercise  price of $30.00  (the  "Purchase
Price"),  subject to adjustment in the event the Company  declares a dividend on
<PAGE>
the Common Stock payable in Common Stock,  subdivides  the number of outstanding
shares of Common  Stock into a larger  number of such  shares,  or combines  the
number  of  outstanding  shares of Common  Stock  into a smaller  number of such
shares,  among other  circumstances.  In addition,  under certain  circumstances
described more fully in the Rights Agreement,  the Rights may become exercisable
for a number of shares of  Common  Stock  having a value  equal to two times the
Purchase Price.

         The Rights  approved by the Board of Directors  are designed to protect
and maximize the value of the outstanding equity interests in the Company in the
event of an  unsolicited  attempt by an  acquirer  to take over the Company in a
manner or on terms not  approved by the Board of  Directors.  Takeover  attempts
frequently  include coercive tactics to deprive the Company's Board of Directors
and its  stockholders  of any effective  opportunity  to determine the Company's
future.

Common Stock Warrants

         In  September  1997,  the  Company  and a  consultant  entered  into an
advisory agreement whereby the consultant acquired a warrant (at a cost of $0.20
per share) to purchase up to 100,000 shares of the Company's  Common Stock at an
exercise  price of $4.50 per  share  (the  "Cash  Purchase  Warrant").  The Cash
Purchase  Warrant is  immediately  exercisable  and  expires  five  years  after
issuance  subject,  however,  to expiration on August 1, 1998, in the event that
the  Company  does not, by April 30,  1998,  consummate  a strategic  partnering
transaction  relating  to the  commercialization  of  certain  of the  Company's
non-invasive technologies (each a "Strategic Partnering Transaction").  Further,
for each of the  Strategic  Partnering  Transactions  described  in the advisory
agreement and  subsequently  entered into by the Company,  the  consultant  will
receive a warrant (at no cost) to purchase 75,000 shares of the Company's Common
Stock at an exercise price of $4.50 per share (the "Transaction  Warrant").  For
each such Strategic Partnering Transaction  consummated prior to April 30, 1998,
the consultant will receive,  in lieu of the foregoing  Transaction  Warrant,  a
Transaction  Warrant to purchase 125,000 shares of the Company's Common Stock at
an exercise price of $4.50 per share (subject to adjustment).  Such  Transaction
Warrants, if issued, would expire five years after issuance.

         As of November 30, 1997,  the Cash Purchase  Warrant was not exercised,
and no additional Transaction Warrants have been issued to the consultant.

Private Placement of Common Stock

         On October 20, 1997,  the Company  completed a private  placement  (the
"Private  Placement")  of  1,799,019  shares of its Common  Stock for  aggregate
proceeds of approximately $7.5 million.  The Common Stock subject to the Private
Placement was sold by the Company pursuant to Regulation D of the Securities Act
of 1933,  as  amended,  on the basis  that the  Common  Stock was  issued  under
circumstances not involving a public offering. Pursuant to a Registration Rights
Agreement, dated October 20, 1997, by and among the Company and the investors in
the Private Placement,  the Company is required to file a registration statement
registering the shares of Common Stock sold in the Private  Placement  within 90
days of the consummation of the Private Placement.

         Participants  in the  Private  Placement  included  certain  investment
funds,  trusts, and individuals,  including Messrs.  Benson,  Lothrop, and Wall,
each of whom is a director of the Company. Additional information regarding this
item is  incorporated  herein by  reference  to  "Certain  Transactions"  in the
Company's  Definitive Proxy  Statement,  which is to be filed with the SEC on or
about January 8, 1998.
<PAGE>
Item 6.  Selected Financial Data

         Set forth below are the selected  consolidated  financial  data for the
Company for the five fiscal years ended  September 30, 1997.  The following data
should be read in conjunction with the Company's financial  statements,  related
notes thereto, and "Management's  Discussion and Analysis of Financial Condition
and Results of Operations."
<TABLE>
<CAPTION>
                                          SELECTED CONSOLIDATED FINANCIAL DATA
                                          (in thousands, except per share data)

                                                                     For the years ended September 30,
                                                   --------------------------------------------------------------------
                                                     1997           1996           1995           1994           1993
                                                   --------       --------       --------       --------       --------
<S>                                                <C>            <C>            <C>            <C>            <C>
Statement of Operations Data:
Revenues:
    Product sales ...........................      $  7,081       $  5,777       $  1,852       $   --         $   --
    Revenues from development agreements ....           400          1,100           --             --             --
                                                   --------       --------       --------       --------       --------
        Total revenues ......................         7,481          6,877          1,852           --             --
                                                   --------       --------       --------       --------       --------

Operating costs and expenses:
    Cost of product sales ...................         3,864          3,661          1,128           --             --
    Research and development and related
        patent acquired .....................          --             --             --             --            1,068
    Research and development ................         3,124          3,988          2,545          1,432            572
    Selling, general, and administrative ....        12,291         11,030          5,775          1,782            382
                                                   --------       --------       --------       --------       --------
        Total operating costs and expenses ..        19,279         18,679          9,448          3,214          2,022
                                                   --------       --------       --------       --------       --------

Operating loss ..............................       (11,798)       (11,802)        (7,596)        (3,214)        (2,022)

Other income (expense):
    Interest income (expense), net ..........           701          1,438            604           (185)           (24)
    Other expense, net ......................           (51)          (224)           (59)            (2)           (21)
                                                   --------       --------       --------       --------       --------
        Total other income (expense), net ...           650          1,214            545           (187)           (45)
                                                   --------       --------       --------       --------       --------

Loss before income taxes ....................       (11,148)       (10,588)        (7,051)        (3,401)        (2,067)

Provision for income taxes ..................             4            --             --             --             --
                                                   --------       --------       --------       --------       --------

Net loss ....................................      $(11,152)      $(10,588)      $ (7,051)      $ (3,401)      $ (2,067)
                                                   ========       ========       ========       ========       ========

Net loss per share ..........................      $  (1.12)      $  (1.07)           --             --             --
                                                   ========       ========
Weighted average shares outstanding .........         9,946          9,875            --             --             --
Pro forma net loss per share ................          --             --         $  (0.93)      $  (0.48)      $  (0.32)
                                                                                 ========       ========       ========
Pro forma weighted average shares outstanding          --             --            7,574          7,020          6,517
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
                                                                                September 30,
                                                        -------------------------------------------------------------
                                                         1997          1996         1995         1994          1993
                                                         ----          ----         ----         ----          ----
<S>                                                     <C>          <C>          <C>          <C>           <C>
Balance Sheet Data:
Cash and cash equivalents and short- and long-term
    investments ..................................      $ 8,544      $19,534      $31,061      $   640       $   180
Working capital ..................................       11,042       17,235       30,054          301          (461)
Total assets .....................................       14,789       25,511       34,886        1,773           442
Redeemable Preferred Stock .......................         --           --           --          6,002         1,758
Total stockholders' equity (deficit) .............       12,091       23,077       33,342       (5,487)       (2,075)
</TABLE>



Item 7. Management's  Discussion and Analysis of Financial Condition and Results
of Operations

         This  Annual  Report  on Form 10-K  contains  certain  statements  of a
forward-looking  nature  relating  to  future  events  or the  future  financial
performance of the Company. Such statements are only predictions, and the actual
events or results  may  differ  materially  from the  results  discussed  in the
forward-looking  statements.  Factors  that could  cause or  contribute  to such
differences  include those discussed below under  "Business  Considerations"  as
well as those discussed in other filings made by the Company with the Securities
and Exchange Commission.

Results of Operations

Fiscal Year ended  September 30, 1997 compared with Fiscal Year ended  September
30, 1996

         Essentially all of the Company's  product sales were from the Company's
SAFHS devices.  For fiscal 1997, product sales were $7.1 million,  compared with
$5.8 million for fiscal 1996. The increase of $1.3 million (or 23%) was a result
of an increase in sales  volume.  International  product sales were 18% of total
product sales in fiscal 1997, compared with 14% in fiscal 1996.

         In fiscal 1997, the Company  recorded  revenues of $400,000  related to
development  agreements with Teijin Limited,  a Japanese  corporation,  compared
with $1.1 million in fiscal 1996. These development  agreements cover two of the
Company's  technologies:  (i) the SAFHS  device  and (ii) the  mechanical-stress
device under development. The SAFHS agreement provides for milestone payments to
the Company for  Teijin's  development  of the product for launch in Japan.  The
Company will  manufacture and supply SAFHS devices to Teijin for clinical trials
and  subsequent  sales in Japan.  Teijin is  responsible  for complying with the
regulatory  requirements  and for marketing and distributing the SAFHS device in
Japan. The  mechanical-stress  agreement  provides for milestone payments to the
Company that will support,  in part, the Company's clinical trials in the United
States  in  exchange  for a first  option  in favor of  Teijin  to  negotiate  a
development and distribution agreement for this device for the Japanese market.
<PAGE>
         Cost of product  sales was $3.9 million for fiscal 1997,  compared with
$3.7 million for fiscal 1996.  Included in cost of sales were  royalties and the
cost of  manufacture  of the SAFHS device by the Company and an outside  source.
Excluding  revenues related to development  agreements,  gross profit for fiscal
1997 was $3.2 million (or 45% as a percentage of product  sales),  compared with
$2.1  million (or 37%) for fiscal 1996.  This $1.1 million  increase (or 52%) in
gross  profit was  principally  due to the  increase in sales volume and reduced
per-unit  product costs,  partially offset by a decrease in the average realized
selling price of a SAFHS device, which was approximately $2,025 for fiscal 1997,
compared  with  approximately  $2,285 for fiscal  1996.  The decrease in average
realized  selling price was primarily due to an increase in the  allowances  for
returns and for price reductions by third-party payors.

         Research  and  development  expenses in fiscal 1997  decreased  to $3.1
million from $4.0 million in fiscal 1996.  The decrease of $864,000 (or 22%) was
primarily the result of (i) reduced  expenditures for designing and building the
mechanical-stress  device for  clinical  studies,  (ii) the  discontinuation  of
shipments of SAFHS devices in connection with certain clinical prescriptions for
which  reimbursement  is  currently  not  available,  and  (iii)  reduced  costs
associated  with analyses of clinical data for the SAFHS therapy.  This decrease
was partially offset by increased expenses  associated with additional  research
projects.

         Selling,  general, and administrative expenses in fiscal 1997 increased
to $12.3  million from $11.0 million in fiscal 1996.  The $1.3 million  increase
(or 11%) resulted from (i) expanded selling and marketing efforts related to the
SAFHS Model 2A, both in the United States and in Europe, and the introduction in
May  1997 of the  second-generation  SAFHS  2000,  in the  United  States,  (ii)
marketing  activities  relating  to the  Company's  line  of  synthetic  casting
materials used in fracture  immobilization,  (iii) increased activities relating
to  reimbursement  efforts,  and (iv) a  nonrecurring  charge  of  approximately
$150,000, related to a workforce reduction in the third quarter of fiscal 1997.

         Net  interest  income in fiscal 1997  decreased  to $701,000  from $1.4
million  in  fiscal  1996,  consistent  with the  level of funds  available  for
investment.  Other  expense,  net for fiscal  1997  decreased  to  $51,000  from
$224,000 for fiscal 1996, principally due to the settlement of a legal action by
the Company in the second quarter of fiscal 1996.

         The Company  incurred net losses of $11.2 million,  or $1.12 per share,
in fiscal 1997 compared with $10.6 million,  or $1.07 per share,  in fiscal 1996
(per share data based upon weighted  average shares  outstanding,  which exclude
options because they are antidilutive).  The increase of $564,000 (or 5%) in net
loss was caused principally by the factors discussed above.

Fiscal Year ended  September 30, 1996 compared with Fiscal Year ended  September
30, 1995

         For fiscal 1996,  product sales were $5.8  million,  compared with $1.9
million  for  fiscal  1995,  which was the  period in which  the  Company  first
recorded sales.  International  product sales were 14% of total product sales in
fiscal 1996; there were no international product sales in fiscal 1995. In fiscal
1996,  the Company  recorded  revenues of $1.1  million  related to  development
agreements with Teijin Limited. No such revenues were reported for fiscal 1995.
<PAGE>
         Cost of product  sales was $3.7 million for fiscal 1996,  compared with
$1.1 million for fiscal 1995. Included in cost of sales were royalties, the cost
of manufacture of the SAFHS device by outside sources,  and the in-house cost of
refurbishment and quality assurance  activities.  Excluding  revenues related to
development  agreements,  gross  profit for 1996 was $2.1  million  (or 37% as a
percentage of product  sales),  compared  with $724,000 (or 39%) for 1995.  This
$1.4  million  increase  (or 192%) in gross  profit was  principally  due to the
increase in sales volume,  while the decrease in gross profit percentage was due
primarily to higher warranty costs.

         Research  and  development  expenses in fiscal 1996  increased  to $4.0
million from $2.5 million in fiscal 1995.  The increase of $1.4 million (or 57%)
was  primarily  the result of increased  staff,  additional  research  projects,
expanded  efforts in designing and building the  mechanical-stress  device,  and
extensive analyses of clinical data associated with the SAFHS therapy.

         Selling,  general, and administrative expenses in fiscal 1996 increased
to $11.0  million from $5.8 million in fiscal 1995. Of the $5.3 million (or 91%)
increase,  $3.2  million  was due to sales and  marketing  efforts in the United
States, including expansion of the direct sales force and related commissions on
sales.  The  remaining  $2.1  million  increase  was  primarily  due to expanded
activities of the Company's subsidiary in Germany;  increased domestic expenses,
including  rent,  utilities,  and  depreciation;  and legal fees associated with
litigation and patent matters.

         Net  interest  income in fiscal 1996  increased  to $1.4  million  from
$604,000 in fiscal 1995, principally due to a full year's interest earned on the
proceeds from the Company's  Initial Public Offering ("IPO") in July 1995. Other
expense, net for fiscal 1996 increased to $224,000 from $59,000 for fiscal 1995,
principally due to the settlement of a legal action by the Company in the second
quarter of fiscal 1996.

         The Company  incurred net losses of $10.6  million,  or $1.07 per share
(per share data based upon weighted  average shares  outstanding,  which exclude
options  because  they are  antidilutive),  in fiscal  1996  compared  with $7.1
million,  or $0.93 per share  (per  share  data  based  upon pro forma  weighted
average  shares  outstanding),  in fiscal 1995. The increase of $3.5 million (or
47%) in net loss was caused principally by the factors discussed above.

Liquidity and Capital Resources

         Since inception, the Company's expenses have significantly exceeded its
revenues,  resulting in an accumulated deficit of $34.3 million at September 30,
1997.  Through  September  30,  1997,  the  Company  had funded  its  operations
primarily through the private placement of equity securities  (aggregating $17.6
million) and an IPO of Common  Stock in July 1995  (aggregating  $28.5  million,
including  proceeds from the overallotment  option).  Subsequent to the close of
fiscal 1997, on October 20, 1997, the Company  completed a $7.5 million  private
placement of 1,799,019 shares of its Common Stock.

         At September  30, 1997,  the Company had a working  capital  balance of
approximately  $11 million.  In fiscal 1997,  the Company used net cash of $10.9
million for operating activities, primarily to fund (i) selling and marketing of
the SAFHS Model 2A and, in the second  half of fiscal  1997,  the SAFHS 2000 and
(ii) an increase in the international  accounts receivable days outstanding from
240 days at September 30, 1996, to 390 days at September 30, 1997. The Company's
<PAGE>
capital  expenditures in fiscal 1997 were $165,000.  The Company  estimates that
equipment and furnishings to expand in-house  manufacturing  and  administrative
support activities will require capital  expenditures of approximately  $300,000
during each of the next two fiscal years.

         To help  conserve  its  capital  resources,  the  Company  reduced  its
workforce  during the quarter ended June 30, 1997.  Through the  reduction,  the
Company  expects to realize  approximately  $750,000 of annual  pretax  savings;
approximately $221,000 was saved in fiscal 1997.

         The Company plans to finance its capital  needs from  existing  capital
resources  and  the  proceeds  of  the  October  1997  private  placement,   the
combination  of  which  the  Company  believes  will be  sufficient  to fund its
operations  into fiscal 1999.  Additional  funding  might not be available  when
needed or on terms  acceptable  to the  Company,  which  would  have a  material
adverse  effect on the  Company's  business,  financial  condition,  results  of
operations, and cash flows.

Recent Pronouncement

         In February  1997,  the  Financial  Accounting  Standards  Board issued
Statement of Financial Accounting Standards No. 128 ("SFAS 128"),  "Earnings Per
Share." This  statement  establishes  standards  for  computing  and  presenting
earnings per share ("EPS"),  replacing the  presentation  of currently  required
primary EPS with a presentation  of Basic EPS. For entities with complex capital
structures,  SFAS 128  requires  the dual  presentation  of both  Basic  EPS and
Diluted EPS on the face of the statement of operations. Under this new standard,
Basic EPS is computed based on weighted average shares  outstanding and excludes
any  potential  dilution;  Diluted  EPS  reflects  potential  dilution  from the
exercise or conversion of securities  into common stock or from other  contracts
to issue common stock,  and is similar to the currently  required  fully diluted
EPS. SFAS 128 is effective for financial  statements  issued for periods  ending
after December 15, 1997,  including interim periods,  and earlier application is
not permitted. When adopted, the Company will be required to restate its EPS for
all prior  periods  presented.  The  Company  does not  expect the impact of the
adoption of SFAS 128 to be material to previously reported EPS.

Business Considerations

Limited Operating History

         The Company has a limited  history of  operations  that,  to date,  has
consisted primarily of research and development, product engineering,  obtaining
approval from the FDA for the Company's  SAFHS device,  developing the Company's
sales and  marketing  organization,  supervising  the  manufacture  of the SAFHS
device by a contract manufacturer, developing in-house manufacturing capability,
and selling its SAFHS device domestically and  internationally.  The Company was
formed for the purpose of acquiring the SAFHS  technology  and related  clinical
data,  as well as the  mechanical-stress  technology.  The  Company  has limited
direct  clinical  trial  experience.  The Company  received  approval of its PMA
Application  for the SAFHS  Model 2A device  and began  marketing  it in October
1994, and further received approval of the SAFHS 2000 device and began marketing
the SAFHS 2000 in May 1997,  and therefore  has limited  experience in marketing
and selling its products in commercial  quantities.  The Company had no previous
<PAGE>
direct manufacturing experience prior to commencing in-house refurbishing of its
SAFHS device in fiscal  1996.  Whether the Company can  successfully  manage the
transition to a larger-scale  commercial  enterprise will depend,  in part, upon
further  developing  its  distribution  network;   successfully  developing  its
manufacturing  capability;   and  strengthening  its  financial  and  management
systems,   procedures,   and  controls.   Failure  to  make  such  a  transition
successfully  would have a material  adverse  effect on the Company's  business,
financial condition, results of operations, and cash flows.

Uncertainty of Market Potential and Market Acceptance

         The  Company's  SAFHS  device was  approved  by the FDA for  commercial
marketing in October 1994 to treat closed, cast-immobilized,  fresh fractures of
the tibia and distal radius within  approved  indications.  Since that time, the
Company has been engaged in efforts to gain  physician  acceptance  of the SAFHS
device and  reimbursement  coverage  for its use.  The market  potential  of the
Company's SAFHS device depends on the acceptance by the medical community of the
use of ultrasound  technology as a safe and effective  method of treating  fresh
fractures and the use of the Company's  SAFHS device by physicians for treatment
of these  fractures.  The SAFHS device is based upon new technology that had not
been used  previously to treat bone  fractures.  There can be no assurance  that
physicians will prescribe treatment using the SAFHS device. In addition,  use of
the  SAFHS  device  depends  significantly  on the  availability  and  extent of
third-party  reimbursement  (which has occurred  substantially on a case-by-case
basis),  increased  awareness of the effectiveness of the SAFHS technology,  and
focused sales efforts by the Company.  Electrical  stimulation devices, the only
other  non-invasive  devices  commercially  available  for the treatment of bone
fractures, have gained only limited physician acceptance to date. Failure of the
Company's  SAFHS  device to  achieve  market  acceptance  would  have a material
adverse  effect on the  Company's  business,  financial  condition,  results  of
operations, and cash flows.

Dependence on Third-Party Reimbursement

         Successful  sales of SAFHS devices in the United  States,  Europe,  and
other  countries  depend on the  availability  of  adequate  reimbursement  from
third-party  payors such as managed care  organizations,  workers'  compensation
insurers, private insurance plans, and government entities. There is significant
uncertainty  concerning  third-party  reimbursement  for the use of any  medical
device incorporating new technology, such as the SAFHS device.  Reimbursement by
a  third-party  payor may depend on a number of factors,  including  the payor's
determination that the use of the SAFHS device is safe and effective,  medically
necessary,  appropriate  for  the  specific  patient,  cost-effective,  and  not
experimental  or  investigational.  In  addition,  devices  incorporating  a new
technology are often  prescribed by physicians for indications  other than those
approved by the FDA (off-label).  Reimbursement  for such off-label uses may not
be  available  or  permitted  by  government  regulations.  Since  reimbursement
approval is required from each payor  individually,  seeking such approvals is a
time-consuming   and  costly  process  that  requires  the  Company  to  provide
scientific  and  clinical  support for the use of the SAFHS device to each payor
separately.  In most cases,  in the United  States,  the  Company  has  received
reimbursement  approval from  third-party  payors only on a case-by-case  basis.
Currently,  third-party payors that have conducted technology assessments of the
SAFHS therapy,  and have established medical guidelines for its use, require the
Company, in most cases, to obtain preauthorization from these third-party payors
prior to providing the SAFHS devices to the patients. There can  be no assurance
<PAGE>
that  third-party  reimbursement  will be  sufficiently  available for the SAFHS
device or any of the Company's  other products that may be developed,  that such
third-party  reimbursement will be adequate,  or that other third-party  payors,
including  Medicare,  will not  recommend  that the SAFHS  device not be covered
under their programs.

         In August 1996,  the Technology  Advisory  Committee of the Health Care
Financing Administration  recommended that the SAFHS device not be covered under
the Medicare  program.  The Company,  however,  continues to pursue coverage for
SAFHS by providing additional information to the HCFA staff; in the interim, the
Company is not shipping orders to patients  covered under  Medicare.  The United
States Congress is also considering  various  proposals to significantly  reduce
Medicare and  Medicaid  expenditures,  which,  if they were enacted and if SAFHS
were covered under Medicare or Medicaid, could have a material adverse effect on
the Company's business,  financial  condition,  results of operations,  and cash
flows. In addition,  third-party payors are increasingly limiting  reimbursement
coverage for medical devices, and in many instances have put pressure on medical
suppliers to lower their prices. The Company has limited experience in obtaining
reimbursement  for its products in countries  other than the United States,  and
has obtained only limited  reimbursement in Germany.  There is no assurance that
the Company's efforts to obtain  reimbursement  approval in Germany and in other
countries  will  be  successful.   Lack  of  or  inadequate   reimbursement   by
governmental and other third-party  payors for the Company's products would have
a  material  adverse  effect on the  Company's  business,  financial  condition,
results of operations, and cash flows.

History of Losses; Profitability Uncertain; Fluctuations in Operating Results

         The Company has incurred  substantial losses since inception and, as of
September 30, 1997, had an accumulated  deficit of approximately  $34.3 million.
Such losses have resulted  principally  from expenses  associated with obtaining
FDA approval for the Company's  SAFHS device,  engineering  and  developing  the
SAFHS and  mechanical-stress  devices,  and establishing and expanding the sales
and marketing organization and reimbursement activities in the United States and
in Europe. The Company expects to generate substantial  additional losses in the
future  primarily  attributable  to development of, and clinical trials for, the
mechanical-stress  device, clinical trials for expanded indications of the SAFHS
technology,  the  continued  expansion of domestic and  international  sales and
marketing activities,  and the expansion of in-house  manufacturing  capability.
Results of operations may fluctuate  significantly from quarter to quarter based
on such factors,  and will also depend upon reimbursement by third-party payors,
new  product  introductions  by  the  Company  or  its  competitors,  timing  of
regulatory actions, expenditures incurred in the research and development of new
products, and the mix of product sales between the United States and abroad. The
Company's future revenues and profitability are critically  dependent on whether
it can successfully market and sell its SAFHS device.  There can be no assurance
that significant revenues or profitability will ever be achieved.

Dependence on Principal Product

         Essentially  all of the  Company's  product  revenues to date have been
derived from sales of its SAFHS device. The SAFHS device is expected to continue
to account for substantially  all of the Company's  revenues for the foreseeable
future.  The Company's  long-term  success will depend in part on the successful
commercialization  of  the  SAFHS  device  for  its  approved  indications,  the
development  and  regulatory  approval  of SAFHS  devices  to  treat  additional
indications,  and the acceptance of the SAFHS treatment by the medical community
and third-party  payors.  Failure to gain market acceptance for the SAFHS device
or to obtain adequate reimbursement coverage,  among other factors, would have a
material adverse effect on the Company's business,  financial condition, results
of operations, and cash flows.
<PAGE>
Limited Sales and Marketing Experience

         The Company  began  marketing  the SAFHS device in the United States in
October 1994.  Because of limited market  awareness of SAFHS therapy,  the sales
effort is a lengthy  process,  requiring the Company to educate  physicians  and
third-party payors regarding the clinical benefits and cost-effectiveness of the
SAFHS  technology,  to assist  patients  in the  reimbursement  process,  and to
provide  product  support to patients.  The Company uses a combination of direct
sales  representatives  and a network of independent  sales  representatives  to
market and distribute its products.  Independent sales representatives typically
market  orthopaedic  and other  devices  for a variety of  manufacturers.  These
representatives  do not have prior  experience  in the sale or use of devices to
accelerate  fresh-fracture  healing.  There  can  be  no  assurance  that  these
independent sales  representatives will commit the necessary resources to market
the SAFHS  device  effectively  or that the  Company's  direct  sales staff will
succeed  in its  efforts to  promote  the SAFHS  technology  to  physicians  and
third-party payors.

         The Company  markets  the SAFHS  device in several  European  countries
through  independent  distributors  and sales agents,  and has recorded sales in
Germany, Austria, the Netherlands,  Denmark,  Switzerland,  Belgium, and Israel.
The Company also will collaborate with marketing  partners in the Pacific Rim to
assist with regulatory  requirements  and to market and distribute the Company's
products.  The Company has entered into one such  agreement  covering Japan with
Teijin Limited, a Japanese corporation. Each of the foreign markets in which the
Company  sells,   or  plans  to  sell,  its  products  has  its  own  regulatory
requirements and approvals, and the distribution, price, and market structure to
be established  by the Company might vary from country to country.  No assurance
can be given that the Company can successfully market the SAFHS device in Europe
or that it can secure additional  marketing partners in the Pacific Rim on terms
acceptable to the Company, or at all.

         The  Company's  marketing  success in the United States and abroad will
depend  on  whether  it can  gain  further  regulatory  approvals,  successfully
demonstrate the cost-effectiveness of its products, further develop direct sales
capability  to  augment  its  existing   distribution   network,  and  establish
arrangements with distributors and marketing partners. Failure by the Company to
successfully market its products  domestically and internationally  would have a
material adverse effect on the Company's business,  financial condition, results
of operations, and cash flows.

Risks Associated with International Operations

         The Company  established a subsidiary in Germany  during fiscal 1995 as
part of its strategy to  introduce  the SAFHS  device in Europe,  and  commenced
commercial  distribution  of the device in  certain  European  countries  during
fiscal 1996.  International  product sales,  which were  principally in Germany,
were 14% of total product sales in fiscal 1996 and 18% in fiscal 1997,  and such
revenues are expected to continue to represent a significant percentage of total
revenues.  The Company believes that its profitability and continued growth will
require expansion of sales in foreign markets,  and so it intends to continue to
expand  its   operations   outside  the  United  States  and  enter   additional
international  markets,  which will require significant management attention and
financial resources.  There can be no assurance that the Company will be able to
achieve market  acceptance of its products in international  markets or maintain
or increase international market demand for its products.
<PAGE>
         As of  September  30,  1997,  the  balance  in  international  accounts
receivable,  net of allowances for returns and bad debt, was $1.4 million,  with
days  outstanding  of  approximately  390  days.  The   international   accounts
receivable  is primarily  derived  from sales in Germany,  where the Company has
received  limited local  reimbursement  on a case-by-case  basis.  To assist the
collection of outstanding  claims and to expedite the  reimbursement  process on
future  claims,  the  Company is seeking  nationwide  approval  by the  National
Krankenkasse,   the  German  governing  organization  that  establishes  medical
reimbursement policy for health-care providers.  To this end, in August 1997 the
Company  submitted  a  formal  application  to the  National  Krankenkasse.  The
application  process  includes  a  scientific  assessment  and  a  reimbursement
assessment; the Company is currently in the scientific-assessment  phase. In the
interim,  the  Company has  elected to sell SAFHS  devices in Germany  only when
reimbursement  is  preapproved.  There can be no assurance that the Company will
obtain a favorable  ruling on its request  for  nationwide  approval on a timely
basis,  if at  all.  Lack  of  approval  by the  National  Krankenkasse  for the
Company's  products  could  have a  material  adverse  effect  on the  Company's
business, financial condition, results of operations, and cash flows.

         The Company's  international  product sales are  denominated in foreign
currencies.  Management  can give no  assurances  that  changes in currency  and
exchange rates will not materially  affect the Company's  revenues,  costs, cash
flows,  and  business  practices  and plans.  Additional  risks  inherent in the
Company's international business activities generally include unexpected changes
in  regulatory  requirements,  tariffs  and  other  trade  barriers,  delays  in
receiving  payments on accounts  receivable  balances,  reimbursement  approvals
(both   government  and  private),   difficulties   in  managing   international
operations,  potentially adverse tax consequences,  restrictions on repatriation
of earnings,  and the burdens of complying  with a wide variety of foreign laws.
There can be no  assurances  that such factors will not have a material  adverse
effect on the Company's future international revenues and, consequently,  on the
Company's business, financial condition, results of operations, or cash flows.

Manufacturing and Related Risks

         The Company has  developed  in-house  refurbishing  capability  for the
SAFHS Model 2A device and in-house  manufacturing  capability for the SAFHS 2000
device. In addition,  the Company uses a contract  manufacturer to manufacture a
portion of the  Company's  SAFHS 2000  production.  Both the  Company's  and the
contract  manufacturer's  respective  facilities have been inspected by the FDA,
and have been approved for the production of the SAFHS 2000 under the FDA's Good
Manufacturing Practices ("GMP") requirements.  Any failure by either the Company
or the contract  manufacturer to maintain its respective  facility in accordance
with GMP  requirements  could result in the inability to  manufacture  the SAFHS
device on a commercial  scale, and could limit the Company's  ability to deliver
the SAFHS device to physicians or patients,  which would have a material adverse
effect on the Company's business,  financial  condition,  results of operations,
and cash flows.

         Several components  incorporated in the SAFHS device currently are, and
will continue to be, manufactured by single-source vendors. For certain of these
components,  there  are  relatively  few  alternative  sources  of  supply,  and
establishing  additional or replacement  suppliers for such components cannot be
accomplished  quickly. Any supply interruption from single-source  vendors would
have a material adverse effect on the Company's business,  financial  condition,
results of operations, and cash flows.
<PAGE>
Intense Competition and Risks Associated with Rapid Technological Change

         The medical device industry is  characterized  by intense  competition.
Many of the Company's  existing and  potential  competitors  have  substantially
greater financial,  marketing, sales, distribution, and technical resources than
the Company and more experience in research and  development,  clinical  trials,
regulatory matters,  manufacturing,  and marketing.  In addition,  most of these
companies  have  established  third-party   reimbursement  for  their  products.
Furthermore,  the medical  device  industry is  characterized  by rapid  product
development and technological  change.  The Company's products could be rendered
obsolete  or  uneconomical  by  technological  advances  by one or  more  of the
Company's  competitors or by other  therapies such as drugs to treat  conditions
addressed  by  the  Company's  products.   The  Company's  business,   financial
condition,  results of  operations,  and cash flows will depend upon whether the
Company can compete  effectively  with other  developers of such medical devices
and therapies.

         The   SAFHS   device    competes    with    non-invasive    bone-growth
electrical-stimulation   devices  and  with  various  surgical  treatments.  The
Company's mechanical-stress device to prevent bone loss related to osteoporosis,
if  developed  and  marketed,  will  compete  with drug  therapies  and exercise
regimens.  There can be no  assurance  that such device will ever be  developed,
approved by the FDA, or become commercially available.  Four companies currently
market  electrical-stimulation  devices for the treatment of non-union fractures
(fractures that remain unhealed after nine months). The Company believes that at
least  one of these  companies  is  conducting  clinical  trials  for the use of
electrical stimulation for the treatment of fresh fractures. In addition,  other
companies are  developing a variety of products and  technologies  to be used in
the  treatment  of  fractures  and   osteoporosis,   including  growth  factors,
bone-graft substitutes, and exercise/physical therapy equipment. There can be no
assurance that  competitors  will not develop  products that are superior to the
Company's products,  achieve greater market acceptance,  or render the Company's
technology and products obsolete or  noncompetitive.  As a result, the Company's
long-term  viability  may  depend on  whether it can  continue  to  develop  new
products.  There can be no  assurance  that the Company  will be able to compete
successfully  against current or future competitors or that competition will not
have a material adverse effect on the Company's business,  financial  condition,
results of operations, or cash flows.

Extensive Government Regulation

         The  manufacture  and sale of medical  devices are subject to extensive
government  regulation in the United States and in other countries.  The process
of obtaining FDA and other required regulatory  approvals can be time-consuming,
expensive,  and uncertain,  frequently  requiring  several years from commencing
clinical trials to receiving  regulatory  approval.  For example, the process of
conducting  clinical  trials and  obtaining  the PMA for the SAFHS Model 2A took
nine years.  The Company is required to file PMA supplements for new or expanded
indications for its SAFHS  technology.  In addition,  modifications to its SAFHS
devices may require PMA  supplements.  If a supplement  were not accepted by the
FDA,  the Company  would be required to  undertake  and  complete the entire PMA
process  in  order  to use  future  SAFHS  devices  to  treat  those  additional
indications or commercialize a modified  device.  There can be no assurance that
the Company will obtain any such  approvals on a timely basis,  or at all, which
could  have a  material  adverse  effect on the  Company's  business,  financial
condition, results of operations, and cash flows.
<PAGE>
         The Company filed a PMA Supplement for its second-generation SAFHS, the
SAFHS  2000,  in  December  1995,  and in  March  1997,  the FDA  approved  this
supplement.  In May 1997, the Company commenced  commercial  distribution of the
SAFHS 2000 in the United  States.  The Company  recently  filed a PMA Supplement
seeking approval of an expanded indication for the SAFHS 2000, but withdrew that
application  in July 1997 to revise and  resubmit it for both  expanded  and new
applications.  The Company expects to refile this  Supplement  during the second
quarter  of  fiscal  1998.  The  Company  will  also be  required  to file a PMA
application  for  its  mechanical-stress  device,  if and  when  development  is
completed.  No assurance can be given that such application will be made, and if
made,  that a PMA or a supplement to an existing PMA will be granted on a timely
basis,  or at all.  In order for the  Company to market the SAFHS  device or any
future products in foreign jurisdictions, it will be required to seek regulatory
approvals in those jurisdictions. No assurance can be given that the Company can
obtain required regulatory  approvals in foreign countries on a timely basis, or
at all.

         Regulatory approvals,  if granted, may include significant  limitations
on the  indicated  uses for which a product  may be  marketed.  FDA  enforcement
policy  strictly  prohibits  the  promotion  by  the  Company  and  any  of  its
distributors of approved  medical  devices for off-label  uses.  There can be no
assurance that the Company will not become subject to FDA actions as a result of
physicians'  prescribing  the SAFHS  device for  off-label  uses.  In  addition,
product  approvals  may be  withdrawn  for  failure  to comply  with  regulatory
standards or the occurrence of unforeseen  problems following initial marketing.
The  Company  is  required  to  adhere  to FDA  regulations  setting  forth  GMP
requirements relating to tests,  control, and documentation.  Ongoing compliance
with GMP and other  applicable  regulatory  requirements  is  monitored  through
periodic  inspections by state and federal  agencies,  including the FDA, and by
comparable agencies in other countries. Failure to comply with applicable United
States and  international  regulatory  requirements can result in failure of the
relevant government agency to grant pre-market approval for devices,  withdrawal
of approval,  total or partial  suspension of  production,  fines,  injunctions,
civil  penalties,  recall or  seizure of  products,  and  criminal  prosecution.
Furthermore,  changes in existing  regulations or adoption of new regulations or
policies  could  prevent the Company  from  obtaining,  or affect the timing of,
future regulatory approvals or clearances.

         During  1996,  the Company  received  regulatory  approval of the SAFHS
Model 2A in Germany.  Under  German law,  medical  devices must have a "GS" mark
affixed to the product  labeling.  The GS mark,  which the  Company  received in
December 1995, denotes that the product meets certain safety standards. In 1996,
the Company also received the "CE" (Medical Device Directive) mark for the SAFHS
Model  2A.  The CE mark is  recognized  by  countries  that are  members  of the
European Union and the European Free Trade Association, and effective June 1998,
will be  required  to be affixed to all  medical  devices  sold in the  European
Union.

         There  can be no  assurance  that the  Company  will be able to  obtain
necessary regulatory  approvals or clearances in the United States,  Europe, the
Pacific Rim, or elsewhere on a timely basis,  or at all. Delays in receipt of or
failure to receive such approvals or clearances, the loss of previously received
approvals or clearances, or failure to comply with existing or future regulatory
requirements  would have a material  adverse  effect on the Company's  business,
financial condition, results of operations, and cash flows.
<PAGE>
Limited Protection of Patents, Copyrights and Proprietary Rights; Risk of Patent
Infringement

         The  Company  relies  on  a  combination  of  patents,  trade  secrets,
copyrights,   and   confidentiality   agreements  to  protect  its   proprietary
technology,  rights, and know-how.  No assurance can be given that the Company's
patent  applications  will issue as patents or that any issued  patents owned by
the Company will provide  competitive  advantages for the Company's  products or
will not be  successfully  challenged  or  circumvented  by  competitors.  Under
current law, patent  applications in the United States are maintained in secrecy
until  patents are issued,  and patent  applications  in foreign  countries  are
maintained in secrecy for a period after filing. The right to a device patent in
the United  States is  attributable  to the first to invent the device,  not the
first to file a patent application. Accordingly, the Company cannot be sure that
its products or technologies do not infringe  patents that may be granted in the
future  pursuant  to pending  patent  applications  or that its  products do not
infringe any patents or proprietary  rights of third parties.  In the event that
any relevant claims of third-party  patents are upheld as valid and enforceable,
the Company could be prevented from selling its products or could be required to
obtain  licenses  from the owners of such patents or be required to redesign its
products to avoid  infringement.  There can be no assurance  that such  licenses
would be  available  or,  if  available,  would be on  terms  acceptable  to the
Company,  or that the Company would be successful in any attempt to redesign its
products or processes to avoid  infringement.  The  Company's  failure to obtain
these licenses or to redesign its products would have a material  adverse effect
on the Company's business,  financial condition, results of operations, and cash
flows. The Company also relies on trade secrets and proprietary information, and
enters into  confidentiality  agreements  with its employees,  consultants,  and
advisors.  There  can be no  assurance  that the  obligations  to  maintain  the
confidentiality   of  such  trade  secrets  and  proprietary   information  will
effectively  prevent  disclosure of the Company's  confidential  information  or
provide  meaningful  protection  for the Company's  confidential  information if
there is unauthorized use or disclosure,  or that the Company's trade secrets or
proprietary  information  will not be  independently  developed by the Company's
competitors. The Company also holds rights to copyrights on text and on software
developed  by or for  itself  for  use  in its  SAFHS  device.  There  can be no
assurance  that any  copyrights  owned by the Company will  provide  competitive
advantages for the Company's  products or will not be challenged or circumvented
by its  competitors.  Litigation  may be necessary to defend  against  claims of
infringement,  to enforce  patents  and  copyrights  issued or  licensed  to the
Company,  or to protect trade secrets,  and could result in substantial cost to,
and  diversion  of effort by, the Company.  There can be no  assurance  that the
Company would prevail in any such litigation.

Uncertainty of New Product Development

         The Company plans to seek FDA approval to commence  clinical  trials in
the near future to expand the approved  indications for the SAFHS  technology to
include other fractures,  spine fusion,  and cartilage repair. In addition,  the
Company has developed a mechanical-stress device to prevent bone loss related to
osteoporosis.  The Company has  commenced a pilot  clinical  trial in the United
States,  and  anticipates  that it  will be  required  to  undertake  additional
development  activities  and human  clinical  trials before  seeking  regulatory
approval for this device.  There can be no assurance that the  mechanical-stress
device will prove to be safe and efficacious, that product development will ever
be  successfully  completed,  that a PMA, if applied for, will be granted by the
FDA  on a  timely  basis,  or  at  all,  that  adequate  levels  of  third-party
<PAGE>
reimbursement will be available, or that the mechanical-stress  device will ever
achieve  commercial  acceptance.  The  Company's  inability to show  efficacy in
additional  applications of its SAFHS  technology,  to successfully  develop the
mechanical-stress   device,   or  to  achieve  market  acceptance  of  such  new
applications  and products would have a material adverse effect on the Company's
business, financial condition, results of operations, and cash flows.

Royalty Payment Obligations; Potential Loss of Exclusive License

         The Company is required to pay a royalty on any net revenues from sales
of the mechanical-stress  device, if such device is successfully  developed.  In
the  event  that  the  Company  does not  commercially  exploit  the  underlying
technology as required by the license agreement for such technology, the Company
will forfeit its exclusive license to the  mechanical-stress  technology.  There
can be no assurance that the Company will  commercially  exploit such technology
within the meaning of such license,  and  forfeiture of such  exclusive  license
could  have a  material  adverse  effect on the  Company's  business,  financial
condition, results of operations, and cash flows.

Product Liability and Insurance

         The  Company  faces an  inherent  business  risk of exposure to product
liability  claims in the event that the use of its  products  is alleged to have
resulted in adverse  effects.  There can be no assurance that  liability  claims
will not exceed the coverage limits of the Company's  insurance policies or that
such insurance will continue to be available on commercially  reasonable  terms,
or at all. Consequently,  product liability claims could have a material adverse
effect on the Company's business,  financial  condition,  results of operations,
and cash flows.

Reliance on Key Personnel

         The Company's success depends to a significant  extent upon a number of
key management and technical personnel.  The loss of the services of one or more
key employees  could have a material  adverse effect on the Company's  business,
financial  condition,  results of operations,  and cash flows.  The Company also
believes  that its future  success  will  depend in large part on whether it can
attract and retain highly skilled  technical,  management,  sales and marketing,
and  reimbursement  personnel.  Competition  for such personnel is intense,  and
there can be no assurance  that the Company will be successful in attracting and
retaining such  personnel.  The Company's  failure to attract,  hire, and retain
these personnel would have a material adverse effect on the Company's  business,
financial condition, results of operations, and cash flows.

Possible Volatility of Stock Price

         The trading  price of the  Company's  Common  Stock could be subject to
significant  fluctuations  in  response to  variations  in  quarterly  operating
results,  announcements  of  technological  innovations  or new  products by the
Company or its competitors,  changes in earning  estimates by analysts,  general
conditions  in the medical  device  industry,  and other  events or factors.  In
addition,  the stock market in general has experienced  extreme price and volume
fluctuations  that  have  affected  the  market  price  for  many  companies  in
industries  similar  or  related  to that of the  Company  and  that  have  been
unrelated  to  the  operating  performance  of  these  companies.  These  market
fluctuations  may  adversely  affect the market  price of the  Company's  Common
Stock.
<PAGE>
Certain Anti-Takeover Provisions

         The Company's Second Amended and Restated  Certificate of Incorporation
grants the Board of Directors the  authority to issue up to 3,000,000  shares of
preferred  stock of the  Company,  $0.0001  par value per share (the  "Preferred
Stock"), in one or more series and to fix the rights,  preferences,  privileges,
and restrictions thereof,  including dividend rights, dividend rates, conversion
rights,  voting rights,  terms of  redemption,  redemption  prices,  liquidation
preferences, and the number of shares constituting any series or the designation
of such series,  without further vote or action by the  stockholders.  Effective
December  6, 1996,  pursuant to the Rights  Agreement,  the  Company's  Board of
Directors  declared  a  dividend  of  one  Right  to  purchase,   under  certain
circumstances, one one-hundredth share of the Company's Series A Preferred Stock
for each outstanding share of Common Stock of the Company.  Although the Company
has no present plans to issue any additional  shares of Preferred  Stock, it may
do so in the future.  (See Part II,  Item 5,  "Market  for  Registrant's  Common
Equity and Related  Stockholder  Matters--The  Stockholder Rights Plan," and the
copy of the Rights Agreement attached as Exhibit 99.1 to the Company's Form 10-K
for the year ended  September  30, 1996,  for more  information  relating to the
Stockholder Rights Plan.)

         The Company's  Bylaws specify  procedures  for director  nominations by
stockholders  and  the  submission  of  other  proposals  for  consideration  at
stockholder  meetings.  Certain  provisions  of Delaware law  applicable  to the
Company could also delay or make more difficult a merger, tender offer, or proxy
contest involving the Company, including Section 203, which prohibits a Delaware
corporation  from  engaging  in any  business  combination  with any  interested
stockholder  for a period of three years unless certain  conditions are met. The
possible  issuance of Preferred Stock  (including  pursuant to the Rights Plan),
the procedures required for director nominations and stockholder proposals,  and
Delaware  law could have the effect of  delaying,  deferring,  or  preventing  a
change in control of the Company,  including without limitation,  discouraging a
proxy contest,  making more difficult the acquisition of a substantial  block of
the  Company's  Common  Stock,  or limiting  the price that  investors  might be
willing to pay in the future for shares of the Company's Common Stock.


Item 8.  Financial Statements and Supplementary Data

         The  information  in  response  to  this  item  is  set  forth  in  the
Consolidated  Financial  Statements beginning on page F-3 of this report on Form
10-K.


Item 9.  Changes in and Disagreements With Accountants on Accounting and
         Financial Disclosure

         None.
<PAGE>
                                    PART III


Item 10.  Directors and Executive Officers of the Registrant

         Information  in  response  to  this  item  is  incorporated  herein  by
reference  to  "Election  of  Directors"  in  Exogen,  Inc.'s  definitive  proxy
statement  ("Definitive Proxy Statement") to be filed pursuant to Regulation 14A
of the Securities  Exchange Act of 1934 (the "Exchange Act") with the Securities
and Exchange  Commission ("SEC") not later than 120 days after the end of fiscal
1997.  Information with respect to compliance with Section 16(a) of the Exchange
Act  is  incorporated   herein  by  reference  to  "Compliance   with  Reporting
Requirements"  in the Company's  Definitive Proxy Statement to be filed with the
SEC.


Item 11.  Executive Compensation

         Information  in  response  to  this  item  is  incorporated  herein  by
reference  to   "Executive   Officers  and   Information   Regarding   Executive
Compensation"  in the Company's  Definitive Proxy Statement to be filed with the
SEC.


Item 12.  Security Ownership of Certain Beneficial Owners and Management

         Information  in  response  to  this  item  is  incorporated  herein  by
reference to "Security Ownership of Certain Beneficial Owners and Management" in
the Company's Definitive Proxy Statement to be filed with the SEC.


Item 13.   Certain Relationships and Related Transactions

         Information  in  response  to  this  item  is  incorporated  herein  by
reference to "Certain  Transactions" in the Company's Definitive Proxy Statement
to be filed with the SEC.

<PAGE>
                                     PART IV


Item 14.  Exhibits, Financial Statement Schedules, and Reports on Form 8-K

(a)      Documents filed as a part of this Form 10-K:
         (1)      Financial  Statements.  The following  Consolidated  Financial
                  Statements of Exogen,  Inc. and report of  independent  public
                  accountants  relating  thereto  are filed with this  report on
                  Form 10-K:  Consolidated  Balance  Sheets as of September  30,
                  1997 and 1996  Consolidated  Statements of Operations  for the
                  years ended  September 30, 1997,  1996, and 1995  Consolidated
                  Statement  of  Changes in  Stockholders'  Equity for the years
                  ended  September  30,  1997,   1996,  and  1995   Consolidated
                  Statements  of Cash Flows for the years  ended  September  30,
                  1997,   1996,  and  1995  Notes  to   Consolidated   Financial
                  Statements 
         (2)      Financial  Statement  Schedules.  Schedule  II--Valuation  and
                  Qualifying  Accounts for the years ended  September  30, 1997,
                  1996,  and 1995  Schedules  not listed above have been omitted
                  because the  information  required to be set forth  therein is
                  not  applicable  or is  shown  in the  Consolidated  Financial
                  Statements or notes thereto.
         (3)      Exhibits.
                            3.1     Second  Amended and Restated  Certificate of
                                    Incorporation  of the Company.  Incorporated
                                    by reference to Exhibit 3.1 to the Company's
                                    Form 10-Q for the third  quarter  ended June
                                    30, 1995.
                            3.2     Amended and Restated  Bylaws of the Company.
                                    Incorporated  by reference to Exhibit 3.3 to
                                    the   Company's   Form   S-1    Registration
                                    Statement (Registration No. 33-92740).
                            4.1     See Exhibits 3.1 and 3.2 for  provisions  of
                                    the Certificate of Incorporation  and Bylaws
                                    of the Company defining rights of holders of
                                    Common Stock of the Company.
                           10.1     Amended  and  Restated   Investors'   Rights
                                    Agreement  dated as of  November  14,  1994,
                                    among the Company,  the investors  listed on
                                    Schedule  A  thereto,  and  the  individuals
                                    listed on  Schedule B thereto.  Incorporated
                                    by   reference   to  Exhibit   10.1  to  the
                                    Company's  Form S-1  Registration  Statement
                                    (Registration No. 33-92740).
                           10.2     Asset Purchase  Agreement  dated as of March
                                    1, 1993,  among  Applied  Epigenetics,  Inc.
                                    ("AEI"), Interpore International,  Inc., and
                                    Interpore Orthopaedics, Inc. Incorporated by
                                    reference to Exhibit  10.2 to the  Company's
                                    Form     S-1     Registration      Statement
                                    (Registration No. 33-92740).
                           10.3     [RESERVED]
                           10.4     Employment Agreement dated February 3, 1994,
                                    between   the   Company   and  John   Bohan.
                                    Incorporated by reference to Exhibit 10.4 to
                                    the   Company's   Form   S-1    Registration
                                    Statement (Registration No. 33-92740).
<PAGE>
                           10.5     Form of  Consulting  Agreements  between the
                                    Company  and each of Drs.  McLeod and Rubin,
                                    as amended.  Incorporated  by  reference  to
                                    Exhibit  10.5  to  the  Company's  Form  S-1
                                    Registration  Statement   (Registration  No.
                                    33-92740).
                           10.6     Form of Stock Restriction  Agreement between
                                    the  Company  and  each of Drs.  McLeod  and
                                    Rubin and Messrs.  Reisner,  Ryaby,  Talish,
                                    McBrayer,   and   Bohan.   Incorporated   by
                                    reference to Exhibit  10.6 to the  Company's
                                    Form     S-1     Registration      Statement
                                    (Registration No. 33-92740).
                           10.7     Form of Stock Purchase Agreement between the
                                    Company and each of Messrs.  Reisner, Ryaby,
                                    and Talish.  Incorporated  by  reference  to
                                    Exhibit  10.7  to  the  Company's  Form  S-1
                                    Registration  Statement   (Registration  No.
                                    33-92740).
                           10.8     Manufacturing  Agreement  dated  January 20,
                                    1994,  between  the  Company and Hi- Tronics
                                    Designs,  Inc.  Incorporated by reference to
                                    Exhibit  10.8  to  the  Company's  Form  S-1
                                    Registration  Statement   (Registration  No.
                                    33-92740).
                           10.9     Form  of  1993  Stock  Option  Plan  Option
                                    Agreement.  Incorporated  by  reference  to
                                    Exhibit  10.9  to the  Company's  Form  S-1
                                    Registration  Statement  (Registration  No.
                                    33-92740).
                           10.10    1995  Stock  Option / Stock  Issuance  Plan.
                                    Incorporated  by reference to Exhibit  10.10
                                    to  the  Company's  Form  S-1   Registration
                                    Statement (Registration No. 33-92740).
                           10.11    Employee Stock  Purchase Plan.  Incorporated
                                    by  reference   to  Exhibit   10.12  to  the
                                    Company's  Form S-1  Registration  Statement
                                    (Registration No. 33-92740).
                           10.12    Lease  Agreement dated December 13, 1994, by
                                    and between the Company and Siemens  Medical
                                    Systems,  Inc.  Incorporated by reference to
                                    Exhibit  10.13  to the  Company's  Form  S-1
                                    Registration  Statement   (Registration  No.
                                    33-92740).
                           10.13    License  Agreement  dated  March  26,  1992,
                                    between  AEI  and  Drs.  McLeod  and  Rubin.
                                    Incorporated  by reference to Exhibit  10.14
                                    to  the  Company's  Form  S-1   Registration
                                    Statement (Registration No. 33-92740).
                           10.14    SAFHS  Agreement  dated  November  30, 1995,
                                    between  the  Company  and  Teijin  Limited.
                                    Incorporated  by reference to Exhibit  10.14
                                    to the  Company's  Form  10-K  for the  year
                                    ended September 30, 1995.
                           10.15+   Mechanical-Stress  Agreement  dated November
                                    30,  1995,  between  the  Company and Teijin
                                    Limited.   Incorporated   by   reference  to
                                    Exhibit 10.15 to the Company's Form 10-K for
                                    the year ended September 30, 1995.
<PAGE>
                           10.16    Employment  Agreement  dated  March 1, 1997,
                                    between the Company and Patrick A. McBrayer.
                                    Incorporated  by reference to Exhibit  10.16
                                    to the  Company's  Form 10-Q for the  second
                                    quarter ended March 31, 1997.
                           10.17*   Severance  Agreement,  dated  May 27,  1997,
                                    between the Company and John Bohan.
                           10.18*   Common  Stock  Purchase   Agreement,   dated
                                    October  20,  1997,  between the Company and
                                    certain   investors  listed  on  Schedule  1
                                    thereto.
                           10.19*   Registration Rights Agreement, dated October
                                    20,  1997,  between  the Company and certain
                                    investors listed on Schedule 1 thereto.
                           10.20*   Form of  Amendment  to 1995  Stock  Option /
                                    Stock Issuance Plan.
                           10.21*   Form of Amendment to Employee Stock Purchase
                                    Plan.
                           21.1     List   of   Subsidiary.    Incorporated   by
                                    reference to Exhibit  21.1 to the  Company's
                                    Form 10-K for the year ended  September  30,
                                    1995.
                           23.1*    Consent of Arthur Andersen LLP.
                           27*      Financial Data Schedule.
                           99.1     Preferred  Shares  Rights  Agreement,  dated
                                    December  6, 1996,  between  the Company and
                                    Registrar  and Transfer  Company,  including
                                    the Certificate of  Determination,  the Form
                                    of Rights  Certificate,  and the  summary of
                                    Rights  attached  thereto as  Exhibits A, B,
                                    and   C,   respectively.   Incorporated   by
                                    reference to Exhibit  99.1 to the  Company's
                                    Form 10-K for the year ended  September  30,
                                    1996.

                           * Filed herewith.
                           + Confidential treatment granted.

(b)      Reports on Form 8-K
                           No reports  on Form 8-K were filed  during the fourth
                           quarter of fiscal 1997.
<PAGE>
                                   SIGNATURES

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

EXOGEN, INC.


By:   /s/ Patrick A. McBrayer                                  December 17, 1997
      -----------------------
      Patrick A. McBrayer, 
      Chief Executive Officer, President, and Director




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

            Signature                                               Date
            ---------                                               ----
                                                     
By:   /s/ John P. Ryaby                                        December 17, 1997
      -----------------
      John P. Ryaby, 
      Chairman of the Board and
      Vice President of Research and
      Development and Regulatory Affairs


By:   /s/ Patrick A. McBrayer                                  December 17, 1997
      -----------------------
      Patrick A. McBrayer, 
      Chief Executive Officer, 
      President, and Director
      (Principal Executive Officer)

By:   /s/ Richard H. Reisner                                   December 17, 1997
      ----------------------
      Richard H. Reisner, 
      Vice President,
      Chief Financial Officer, 
      and Secretary
      (Principal Financial and 
      Accounting Officer)

By:   /s/ Buzz Benson                                          December 17, 1997
      ---------------
      Buzz Benson, 
      Director

By:   /s/ Donald J. Lothrop                                    December 17, 1997
      ---------------------
      Donald J. Lothrop, 
      Director
<PAGE>

By:   /s/ Peter C. Madeja                                      December 17, 1997
      -------------------
      Peter C. Madeja, 
      Director

By:   /s/ David J. Ottensmeyer                                 December 17, 1997
      ------------------------
      David J. Ottensmeyer, 
      Director

By:   /s/ Terence D. Wall                                      December 17, 1997
      -------------------
      Terence D. Wall, 
      Director

<PAGE>
                                  EXOGEN, INC.

                                  EXHIBIT INDEX
                                  -------------

             Number                            Description   
             ------                            -----------   
                                                      
              3.1          Second   Amended   and   Restated    Certificate   of
                           Incorporation   of  the  Company.   Incorporated   by
                           reference to Exhibit 3.1 to the  Company's  Form 10-Q
                           for the third quarter ending June 30, 1995.
              3.2          Amended   and   Restated   Bylaws  of  the   Company.
                           Incorporated  by  reference  to  Exhibit  3.3  to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
              4.1          See  Exhibits  3.1  and  3.2  for  provisions  of the
                           Certificate  of  Incorporation   and  Bylaws  of  the
                           Company defining rights of holders of Common Stock of
                           the Company.
             10.1          Amended  and  Restated  Investors'  Rights  Agreement
                           dated as of November 14, 1994, among the Company, the
                           investors  listed  on  Schedule  A  thereto,  and the
                           individuals    listed   on    Schedule   B   thereto.
                           Incorporated  by  reference  to  Exhibit  10.1 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.2          Asset Purchase  Agreement  dated as of March 1, 1993,
                           among Applied  Epigenetics,  Inc. ("AEI"),  Interpore
                           International, Inc., and Interpore Orthopaedics, Inc.
                           Incorporated  by  reference  to  Exhibit  10.2 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.3          [RESERVED]
             10.4          Employment  Agreement dated February 3, 1994, between
                           the Company and John Bohan. Incorporated by reference
                           to   Exhibit   10.4  to  the   Company's   Form   S-1
                           Registration Statement (Registration No. 33-92740).
             10.5          Form of Consulting Agreements between the Company and
                           each  of  Drs.   McLeod   and  Rubin,   as   amended.
                           Incorporated  by  reference  to  Exhibit  10.5 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.6          Form  of  Stock  Restriction  Agreement  between  the
                           Company and each of Drs. McLeod and Rubin and Messrs.
                           Reisner,   Ryaby,   Talish,   McBrayer,   and  Bohan.
                           Incorporated  by  reference  to  Exhibit  10.6 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.7          Form of Stock Purchase  Agreement between the Company
                           and  each of  Messrs.  Reisner,  Ryaby,  and  Talish.
                           Incorporated  by  reference  to  Exhibit  10.7 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
<PAGE>
                                  EXOGEN, INC.

                                  EXHIBIT INDEX
                                  -------------

             Number                            Description   
             ------                            -----------   

             10.8          Manufacturing   Agreement  dated  January  20,  1994,
                           between  the  Company and  Hi-Tronics  Designs,  Inc.
                           Incorporated  by  reference  to  Exhibit  10.8 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.9          Form of 1993  Stock  Option  Plan  Option  Agreement.
                           Incorporated  by  reference  to  Exhibit  10.9 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.10         1995 Stock Option / Stock Issuance Plan. Incorporated
                           by reference to Exhibit 10.10 to the  Company's  Form
                           S-1   Registration   Statement    (Registration   No.
                           33-92740).
             10.11         Employee  Stock  Purchase   Plan.   Incorporated   by
                           reference to Exhibit 10.12 to the Company's  Form S-1
                           Registration Statement (Registration No. 33-92740).
             10.12         Lease  Agreement  dated  December  13,  1994,  by and
                           between the Company and Siemens Medical Systems, Inc.
                           Incorporated  by  reference  to Exhibit  10.13 to the
                           Company's    Form    S-1    Registration    Statement
                           (Registration No. 33-92740).
             10.13         License  Agreement dated March 26, 1992,  between AEI
                           and Drs. McLeod and Rubin.  Incorporated by reference
                           to   Exhibit   10.14  to  the   Company's   Form  S-1
                           Registration Statement (Registration No. 33-92740).
             10.14         SAFHS Agreement dated November 30, 1995,  between the
                           Company and Teijin Limited. Incorporated by reference
                           to Exhibit 10.14 to the  Company's  Form 10-K for the
                           year ended September 30, 1995.
             10.15+        Mechanical-Stress  Agreement dated November 30, 1995,
                           between the Company and Teijin Limited.  Incorporated
                           by reference to Exhibit 10.15 to the  Company's  Form
                           10-K for the year ended September 30, 1995.
             10.16         Employment Agreement dated March 1, 1997, between the
                           Company  and  Patrick A.  McBrayer.  Incorporated  by
                           reference to Exhibit 10.16 to the Company's Form 10-Q
                           for the second quarter ended March 31, 1997.
             10.17*        Severance Agreement,  dated May 27, 1997, between the
                           Company and John Bohan. 
             10.18*        Common Stock  Purchase  Agreement,  dated October 20,
                           1997,  between  the  Company  and  certain  investors
                           listed on Schedule 1 thereto.
             10.19*        Registration  Rights  Agreement,  dated  October  20,
                           1997,  between  the  Company  and  certain  investors
                           listed on Schedule 1 thereto.
             10.20*        Form  of  Amendment  to  1995  Stock  Option  / Stock
                           Issuance Plan.
             10.21*        Form of Amendment to Employee Stock Purchase Plan.
             21.1          List of  Subsidiary.  Incorporated  by  reference  to
                           Exhibit 21.1 to the Company's  Form 10-K for the year
                           ended September 30, 1995.
             23.1*         Consent of Arthur Andersen LLP.
<PAGE>
                                  EXOGEN, INC.

                                  EXHIBIT INDEX
                                  -------------

             Number                            Description   
             ------                            -----------   

             27*           Financial Data Schedule.
             99.1          Preferred Shares Rights Agreement,  dated December 6,
                           1996,  between the Company and Registrar and Transfer
                           Company,  including the Certificate of Determination,
                           the Form of Rights  Certificate,  and the  summary of
                           Rights  attached  thereto  as  Exhibits  A, B, and C,
                           respectively.  Incorporated  by  reference to Exhibit
                           99.1 to the  Company's  Form 10-K for the year  ended
                           September 30, 1996.

                           * Filed herewith.
                           + Confidential treatment granted.


<PAGE>
                                  EXOGEN, INC.

         INDEX TO FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULES


1. FINANCIAL STATEMENTS

           Report of Independent Public Accountants.............................

           Consolidated Balance Sheets as of September 30, 1997 and 1996........

           Consolidated Statements of Operations for the years ended
                September 30, 1997, 1996, and 1995..............................

           Consolidated Statement of Changes in Stockholders' Equity
                for the years ended September 30, 1997, 1996, and 1995..........

           Consolidated Statements of Cash Flows for the years ended
                September 30, 1997, 1996, and 1995..............................

           Notes to Consolidated Financial Statements...........................


2. FINANCIAL STATEMENT SCHEDULES

           Schedule II--Valuation and Qualifying Accounts for the years ended
                September 30, 1997, 1996, and 1995..............................

<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS


To Exogen, Inc.:

         We have audited the accompanying consolidated balance sheets of Exogen,
Inc. (a Delaware  corporation) and subsidiary as of September 30, 1997 and 1996,
and the related consolidated statements of operations,  changes in stockholders'
equity, and cash flows for each of the three years in the period ended September
30, 1997. These consolidated  financial  statements and the schedule referred to
below are the responsibility of the Company's management.  Our responsibility is
to express an opinion on these  financial  statements  and schedule 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  financial  statements  referred to above  present
fairly, in all material  respects,  the financial  position of Exogen,  Inc. and
subsidiary  as of  September  30,  1997  and  1996,  and the  results  of  their
operations  and their cash flows for each of the three years in the period ended
September 30, 1997, in conformity with generally accepted accounting principles.

         Our audits were made for the purpose of forming an opinion on the basic
financial  statements  taken as a whole.  The  schedule  listed  in the index to
financial statements and financial statement schedules is presented for purposes
of complying  with the Securities and Exchange  Commission's  rules,  and is not
part of the basic financial statements.  This schedule has been subjected to the
auditing procedures applied in the audit of the basic financial statements,  and
in our opinion,  fairly  states in all  material  respects  the  financial  data
required to be set forth therein in relation to the basic  financial  statements
taken as a whole.

                                                          /s/ARTHUR ANDERSEN LLP
                                                          ----------------------
                                                             ARTHUR ANDERSEN LLP

New York, New York
November 3, 1997(except with respect to the matter discussed in the second
                paragraph of Note 15, as to which the date is November 14, 1997)
<PAGE>  
<TABLE>
<CAPTION>
                                        EXOGEN, INC.

                                 CONSOLIDATED BALANCE SHEETS
                                 ---------------------------
                              (in thousands, except share data)


                                                                           September 30,
                                                                     ----------------------
                                                                        1997          1996
                                                                     --------      --------
                    ASSETS

<S>                                                                  <C>           <C>
Current assets:
    Cash and cash equivalents ..................................     $  4,018      $  8,115
    Short-term investments .....................................        4,526         6,824
    Accounts receivable, net of allowances of $1,786 and $346 in
         1997 and 1996, respectively ...........................        3,384         2,943
    Inventories ................................................        1,515         1,239
    Interest receivable ........................................           60           202
    Other current assets .......................................          237           344
                                                                     --------      --------
                 Total current assets ..........................       13,740        19,667
Furniture, fixtures and equipment, net .........................          758           979
Long-term investments ..........................................         --           4,595
Other assets ...................................................          291           270
                                                                     --------      --------
                 Total assets ..................................     $ 14,789      $ 25,511
                                                                     ========      ========

                    LIABILITIES AND STOCKHOLDERS' EQUITY


Current liabilities:
    Accounts payable ...........................................     $    463      $    685
    Accrued liabilities ........................................        2,178         1,625
    Capital lease obligations ..................................            2            15
    Other current liabilities ..................................           55           107
                                                                     --------      --------
                 Total current liabilities .....................        2,698         2,432
Capital lease obligations ......................................         --               2
                                                                     --------      --------
                 Total liabilities .............................        2,698         2,434

Commitments and contingencies (Note 11)
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
                                        EXOGEN, INC.

                                 CONSOLIDATED BALANCE SHEETS
                                 ---------------------------

                              (in thousands, except share data)
                                        (continued)


                                                                           September 30,
                                                                     ----------------------
                                                                        1997          1996
                                                                     --------      --------
                     
<S>                                                                  <C>           <C>
Stockholders' equity:
    Preferred Stock, $0.0001 par value; 3,000,000 shares
         authorized in 1997 and 1996; no shares issued or
         outstanding ...........................................         --            --
    Common Stock, $0.0001 par value; 27,000,000 shares
         authorized in 1997 and 1996; 9,998,140 shares issued
         and outstanding in 1997 and 9,909,192 shares issued
         and outstanding in 1996 ...............................            1             1
    Additional paid-in capital .................................       46,691        46,272
    Cumulative translation adjustment ..........................         (275)          (22)
    Accumulated deficit ........................................      (34,326)      (23,174)
                                                                     --------      --------
                 Total stockholders' equity ....................       12,091        23,077
                                                                     --------      --------
                 Total liabilities and stockholders' equity ....     $ 14,789      $ 25,511
                                                                     ========      ========

</TABLE>

The  accompanying  notes are an integral  part of these  consolidated  financial
statements.
<PAGE>
<TABLE>
<CAPTION>
                                      EXOGEN, INC.

                         CONSOLIDATED STATEMENTS OF OPERATIONS
                         -------------------------------------
                         (in thousands, except per share data)


                                                    For the years ended September 30,
                                                  ------------------------------------

                                                     1997          1996          1995
                                                  --------      --------      --------
<S>                                               <C>           <C>           <C>
Revenues:
     Product sales ..........................     $  7,081      $  5,777      $  1,852
     Revenues from development agreements ...          400         1,100          --
                                                  --------      --------      --------
          Total revenues ....................        7,481         6,877         1,852
                                                  --------      --------      --------

Operating costs and expenses:
     Cost of product sales ..................        3,864         3,661         1,128
     Research and development ...............        3,124         3,988         2,545
     Selling, general, and administrative ...       12,291        11,030         5,775
                                                  --------      --------      --------
           Total operating costs and expenses       19,279        18,679         9,448
                                                  --------      --------      --------

Operating loss ..............................      (11,798)      (11,802)       (7,596)

Other income (expense):
     Interest income, net ...................          701         1,438           604
     Other expense, net .....................          (51)         (224)          (59)
                                                  --------      --------      --------
           Total other income, net ..........          650         1,214           545
                                                  --------      --------      --------

Loss before income taxes ....................      (11,148)      (10,588)       (7,051)

Provision for income taxes ..................            4          --            --
                                                  --------      --------      --------
 
Net loss ....................................     $(11,152)     $(10,588)     $ (7,051)
                                                  ========      ========      ========


Net loss per share ..........................     $  (1.12)     $  (1.07)         --
                                                  ========      ========      ========

Weighted average shares outstanding .........        9,946         9,875          --

Pro forma net loss per share ................         --            --        $  (0.93)
                                                                              ========

Pro forma weighted average shares outstanding         --            --           7,574

</TABLE>
The  accompanying  notes are an integral  part of these  consolidated  financial
statements.
<PAGE>
<TABLE>
<CAPTION>
                                                       EXOGEN, INC.

                                 CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
                                 ---------------------------------------------------------

                                  For the Years Ended September 30, 1997, 1996, and 1995
                                                      (in thousands)

                                         Common Stock          Additional     Cumulative
                                         ------------            Paid-in       Translation      Accumulated
                                     Shares        Amount        Capital       Adjustment         Deficit         Total
                                     ------        ------        -------       ----------         -------         -----
<S>                                   <C>         <C>            <C>            <C>             <C>              <C>
Balance, October 1, 1994 ...          1,385       $   --         $     13       $   --          $ (5,500)       $ (5,487)

   Amortization of Preferred
      Stock issuance costs .           --             --             --             --               (35)            (35)
   Issuance of Common Stock           2,875           --           28,509           --              --            28,509
   Conversion of Preferred
      Stock to Common Stock           5,590              1         17,416           --              --            17,417
   Translation adjustment ..           --             --             --              (11)           --               (11)
   Net loss ................           --             --             --             --            (7,051)         (7,051)
                                      -----        -------        -------       --------         -------         -------
Balance, September 30,1995 .          9,850              1         45,938            (11)        (12,586)         33,342

   Issuance of Common Stock              39           --              245           --              --               245
   Exercise of stock options             20           --               37           --              --                37
   Amortization of
      nonemployee stock
      option compensation ..           --             --               52           --              --                52
   Translation adjustment ..           --             --             --              (11)           --               (11)
   Net loss ................           --             --             --             --           (10,588)        (10,588)
                                      -----        -------        -------       --------         -------         -------

Balance, September 30, 1996           9,909              1         46,272            (22)        (23,174)         23,077

   Issuance of Common Stock              57           --              205           --              --               205
   Exercise of stock options             32           --               12           --              --                12
   Sale of warrants ........           --             --               20           --              --                20
   Amortization of
      nonemployee stock
      option and warrant
      compensation .........           --             --              182           --              --               182
   Translation adjustment ..           --             --             --             (253)           --              (253)
   Net loss ................           --             --             --             --           (11,152)        (11,152)
                                      -----        -------        -------       --------         -------         -------

Balance, September 30, 1997           9,998       $      1       $ 46,691       $   (275)       $(34,326)       $ 12,091
                                      =====       ========       ========       ========        ========        ========

</TABLE>
The  accompanying  notes are an integral  part of these  consolidated  financial
statements.
<PAGE>
<TABLE>
<CAPTION>
                                                EXOGEN, INC.

                                    CONSOLIDATED STATEMENTS OF CASH FLOWS
                                    -------------------------------------
                                               (in thousands)

                                                                         For the years ended September 30,
                                                                       ------------------------------------
                                                                         1997          1996           1995
                                                                       --------      --------      --------
<S>                                                                    <C>           <C>           <C>                          
Cash flows from operating activities:
     Net loss ....................................................     $(11,152)     $(10,588)     $ (7,051)
     Adjustments to reconcile net loss to net cash used in
        operating activities:
          Depreciation and amortization ..........................          394           330           186
          Amortization of net premium (discount) on short- and
               long-term investments .............................           72          (196)          (75)
          Amortization of nonemployee stock
               option/warrant compensation .......................          182            52          --
          Provision for losses on accounts receivable ............          250          --            --
          Other adjustments ......................................            2            14            47
     Decrease (increase) in assets:
          Accounts receivable, net ...............................         (908)       (2,081)         (871)
          Interest receivable ....................................          142          (158)          (44)
          Inventories ............................................         (320)          311          (738)
          Other current assets ...................................          104          (131)         (148)
          Other assets ...........................................          (30)          (46)         (188)
     Increase (decrease) in liabilities:
          Accounts payable .......................................         (207)          162            80
          Accrued liabilities ....................................          577           637           577
          Notes payable ..........................................         --            --            (380)
          Other current liabilities ..............................          (52)          107          --
                                                                       --------      --------      --------
               Net cash used in operating activities .............      (10,946)      (11,587)       (8,605)
                                                                       --------      --------      --------

Cash flows from investing activities:
     Purchase of short- and long-term investments ................       (1,392)      (20,868)      (16,310)
     Proceeds from sale of short- and long-term
       investments ...............................................        8,212        18,532         7,500
     Purchase of furniture, fixtures and equipment ...............         (165)         (411)         (916)
     Other investing activities ..................................         --               4            (4)
                                                                       --------      --------      --------
               Net cash provided by (used in) investing activities        6,655        (2,743)       (9,730)
                                                                       --------      --------      --------

Cash flows from financing activities:
     Proceeds from Preferred Stock issuances and
       bridge financing ..........................................         --            --          11,379
     Proceeds from exercise of stock options .....................           12            37          --
     Proceeds from sale of stock warrants ........................           20          --            --
     Proceeds from sale of Common Stock ..........................          205           245        28,508
     Principal payments under capital leases .....................          (15)          (14)          (13)
                                                                       --------      --------      --------
               Net cash provided by financing activities .........          222           268        39,874
                                                                       --------      --------      --------
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
                                                EXOGEN, INC.

                                    CONSOLIDATED STATEMENTS OF CASH FLOWS
                                    -------------------------------------
                                               (in thousands)
                                                (continued)

                                                                         For the years ended September 30,
                                                                       ------------------------------------
                                                                         1997          1996           1995
                                                                       --------      --------      --------
<S>                                                                    <C>           <C>           <C>                          

Effect of exchange rate changes on cash and cash
   equivalents ...................................................          (28)            1            (3)
                                                                       --------      --------      --------

Net (decrease) increase in cash and cash equivalents .............       (4,097)      (14,061)       21,536
Cash and cash equivalents, beginning of year .....................        8,115        22,176           640
                                                                       --------      --------      --------
Cash and cash equivalents, end of year ...........................     $  4,018      $  8,115      $ 22,176
                                                                       ========      ========      ========


</TABLE>
The  accompanying  notes are an integral  part of these  consolidated  financial
statements.
<PAGE>
                                  EXOGEN, INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1.   Description of Business

         Exogen,  Inc. ("Exogen" or the "Company"),  incorporated in New York in
January 1992 and reincorporated in Delaware in February 1993, designs, develops,
manufactures,  and markets  medical  devices for the  non-invasive  treatment of
musculoskeletal  injury and disease.  The Company commenced  operations in March
1993.

         In  fiscal  1993  and  1994,  the  Company's  activities  consisted  of
acquiring  certain  assets  related to the Sonic  Accelerated  Fracture  Healing
System ("SAFHS")  ultrasound  technology (see Note 2), completing the Pre-Market
Approval ("PMA")  requirements of the United States Food and Drug Administration
("FDA")   relating  to  the  SAFHS   device,   and   establishing   an  internal
organizational  structure.  On October 5, 1994, the Company  received a PMA from
the FDA to commercially distribute the Company's SAFHS device.

         In fiscal 1995, the Company  commenced  commercial  distribution of the
SAFHS   device  in  the  United   States,   continued  to  expand  the  internal
organizational  structure,  increased research and development  activities,  and
established  a wholly  owned  German  subsidiary.  In fiscal 1996 and 1997,  the
Company further  strengthened  its domestic sales and marketing  infrastructure,
continued its research and development  activities of the SAFHS device and other
technologies, and began and expanded commercial distribution of the SAFHS device
in certain European  countries.  Essentially all the Company's product sales are
generated from sales of the SAFHS device, and therefore,  the Company is subject
to the risks  associated with a single  product.  The majority of primary payors
for significantly all the Company's sales are third-party insurers.


2.   Acquisition of Ultrasound Technology and Patent

         On March 1, 1993, the Company  purchased  certain assets related to the
SAFHS  ultrasound  technology from Interpore  Orthopaedics,  Inc.  ("Interpore")
under the terms of an asset purchase agreement (the "Asset Purchase Agreement").
Concurrently,  the Company acquired a license to the initial  ultrasound  United
States patent for bone healing (the "Initial  Patent") under an agreement  dated
March 1, 1993 (the "License Agreement").

         Under the terms of the Asset Purchase  Agreement,  (i) the Company paid
$600,000  for those  rights and (ii) the Company is  obligated  to make  royalty
payments to Interpore  based upon net revenues from sales of devices  covered by
the Initial Patent.

         Under the terms of the License Agreement,  the Company paid $475,000 to
the patent holder. Accordingly,  the Company was assigned the subject patent and
the  assignment  was duly  filed  with the United  States  Patent and  Trademark
Office.

         The Company  expensed the SAFHS  ultrasound  technology and the initial
patent on the date acquired in fiscal 1993.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

3.   Significant Accounting Policies

   Consolidated Financial Statements

         The consolidated  financial  statements include the accounts of Exogen,
Inc. and its wholly owned subsidiary. These statements are prepared from records
maintained in the country in which the enterprise is located.  All  intercompany
transactions and balances are eliminated in consolidation.

         The Company  established a German subsidiary,  Exogen (Europe) GmbH, in
May 1995, and the subsidiary received final incorporation status in August 1995.
The subsidiary began distributing the SAFHS device in Europe in fiscal 1996.

   Translation of Foreign Currency

         All assets and  liabilities  of the Company's  foreign  operations  are
translated  to U.S.  dollars  at  year-end  exchange  rates,  while  the  income
statement is  translated  at average  exchange  rates in effect during the year.
Translation adjustments are recorded as a component of stockholders' equity.

   Revenue Recognition and Cost of Sales

         Upon shipment of the SAFHS device,  the Company  records revenue net of
allowances  for  returns  and amounts  that the  Company  believes a  respective
third-party payor might deduct from the price of the SAFHS device.

         When revenue is recognized, the related costs are classified as cost of
sales.  The  cost  of  devices  shipped  in  connection  with  certain  clinical
prescriptions  for which  reimbursement  is currently  not available is recorded
either as sales and marketing expense or as research and development expense.

         Royalties on product revenues are included in cost of sales.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

   Cash and Cash Equivalents and Investments

         The Company considers all highly liquid  investments  purchased with an
original  maturity of three months or less to be cash  equivalents.  Cash,  cash
equivalents, and investments consist of the following (in thousands):
<TABLE>
<CAPTION>
                                                                 September 30,
                                                           ---------------------
                                                              1997          1996 
                                                           -------       -------  
<S>                                                        <C>           <C>
Cash and cash equivalents
- -------------------------
     Cash ..........................................       $   205       $   145
     Money markets .................................         1,557           917
     Commercial paper ..............................         2,256         7,053
                                                           -------       -------
                                                             4,018         8,115
Short-term investments
- ----------------------
     U.S. Agency notes .............................         1,000         2,171
     Corporate bonds ...............................         2,518         2,955
     Bank notes ....................................         1,008         1,502
     Other .........................................          --             196
                                                           -------       -------
                                                             4,526         6,824   
Long-term investments
- ---------------------
     U.S. Agency notes .............................          --           2,017
     Corporate bonds ...............................          --           2,578
                                                           -------       -------
                                                              --           4,595

Total cash, cash equivalents, and investments ......       $ 8,544       $19,534
                                                           =======       =======
</TABLE>


         As of  September  30,  1997 and  1996,  all  short-term  and  long-term
investments, if any, have been classified as held to maturity. These investments
are  stated at  amortized  cost,  which  approximates  market,  and  consist  of
certificates of deposit,  commercial  paper,  U.S.  Agency notes,  and corporate
bonds.

   Accounts Receivable

         Accounts  receivable is recorded net of accumulated  allowances for (i)
returns and amounts  that the Company  believes a respective  third-party  payor
might deduct from the price of the SAFHS device (see also  "Revenue  Recognition
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)


and Cost of Sales"  discussed  above)  and (ii) bad debt.  Bad debt  expense  is
classified as a Selling,  general, and administrative  expense, and was $250,000
in fiscal 1997. No bad debt expense was recorded prior to fiscal 1997; in fiscal
1996 and 1995, accounts receivable  allowances were recorded in the aggregate as
sales reserves. Because the SAFHS device was new and marketed only since October
1994, it was not practicable in fiscal 1996 and 1995 to segregate the allowances
discussed above into three  components.  Changes in economic or other conditions
could affect the ability of third-party payors to meet their obligations.

         Of the $3.4 million in Accounts Receivable,  net at September 30, 1997,
approximately  40%  was  derived  from  the  Company's   operations  in  Europe,
principally Germany,  where the Company has received limited local reimbursement
on a case-by-case  basis. (See Note 5, "Geographic  Segment  Information," below
for a further discussion of international operations.)

   Inventories

         Inventories  are  stated at the lower of cost or market on a  first-in,
first-out basis.

   Furniture, Fixtures and Equipment

         Furniture, fixtures and equipment are recorded at cost. Depreciation is
computed  using the  straight-line  method  over the related  assets'  estimated
useful lives,  which range from two to five years.  Leasehold  improvements  are
recorded at cost,  and are  amortized  using the  straight-line  method over the
useful life of the asset or the lease  term,  whichever  is shorter.  Management
reviews these assets for impairment  whenever events or changes in circumstances
indicate that the carrying  amounts of the assets might not be recoverable.  The
Company has determined that, as of September 30, 1997, no long-lived assets have
been impaired.

   Patent Costs

         Costs incurred relating to developing patents are expensed as incurred.

   Income Taxes

         Deferred  income  taxes  are  recognized  for the tax  consequences  of
temporary  differences  by applying  enacted  statutory tax rates  applicable in
future years to differences between the financial statement carrying amounts and
the tax bases of existing assets and liabilities.

   Net Loss Per Common Share

         For the years ended  September 30, 1997 and 1996, net loss per share is
determined  using  the  weighted  average  number  of  shares  of  Common  Stock
outstanding during the period presented. The weighted average shares outstanding
is based upon Accounting  Principles Board Opinion No. 15 ("APB 15"),  "Earnings
per Share." Options have been excluded because they are antidilutive.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)


         For the year ended  September 30, 1995, pro forma net loss per share is
determined  using  the  weighted  average  number  of  shares  of  Common  Stock
outstanding during the period presented. The weighted average shares outstanding
is  based  upon  (i) APB 15 for the  periods  after  March  31,  1995  and  (ii)
Securities and Exchange  Commission Staff Accounting  Bulletin No. 83 ("SAB 83")
for the period October 1994 through March 1995. Pursuant to SAB 83, the Series B
Preferred  Stock and options  issued during the 12 months  preceding the Initial
Public  Offering (see Note 4) at prices below the Initial Public  Offering price
have been included in the Company's  loss per share  computation  for the period
presented as if the shares were  converted into Common Stock at the beginning of
that period, even though they were antidilutive. The Series A Preferred Stock is
included for the period  presented as if the shares were  converted  into Common
Stock at the  beginning  of that period.  Options  issued prior to the 12 months
preceding the Initial Public Offering are excluded as they are antidilutive.

         Historical  loss per share data for fiscal 1995 have not been presented
as such information is not meaningful.

   Stock-Based Compensation

         Accounting  for stock  options  issued  to  employees  and  nonemployee
directors and stock issued  pursuant to the Company's  employee  stock  purchase
plan is  based  upon the  "intrinsic  value"  method  set  forth  in  Accounting
Principles  Board  Opinion No. 25 ("APB 25"),  "Accounting  for Stock  Issued to
Employees," with  supplemental pro forma disclosures of "fair value" as required
by Statement of Financial Accounting Standards No. 123 ("SFAS 123"), "Accounting
for Stock-Based Compensation."

         The "fair value"  method of  accounting  is used for stock  options and
warrants  issued to  consultants.  The fair value is calculated  using an option
pricing model, and the resultant  compensation is recognized over the shorter of
the vesting period or the service period.

   Management's Use of Significant Estimates

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the reported  amounts of assets and  liabilities at the
date of the  financial  statements  and the  reported  amounts of  revenues  and
expenses during the reported period.  Specifically,  the accounts receivable and
revenue of the Company have been reduced by an estimated reserve for returns and
disallowed amounts; additionally, the accounts receivable has been reduced by an
estimated  reserve  for bad  debts.  Actual  results  could  differ  from  those
estimates.  Also, the Company's  inventory consists primarily of high-technology
finished goods subject to management's  estimates as to the need of obsolescence
reserves.  In the  case  of  accrued  liabilities  not  evidenced  by  invoices,
estimates are based on management's judgment.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

   Recent Pronouncement 

         In February  1997,  the  Financial  Accounting  Standards  Board issued
Statement of Financial Accounting Standards No. 128 ("SFAS 128"),  "Earnings Per
Share." This  statement  establishes  standards  for  computing  and  presenting
earnings per share ("EPS"),  replacing the  presentation  of currently  required
primary EPS with a presentation  of Basic EPS. For entities with complex capital
structures,  SFAS 128  requires  the dual  presentation  of both  Basic  EPS and
Diluted EPS on the face of the statement of operations. Under this new standard,
Basic EPS is computed based on weighted average shares  outstanding and excludes
any  potential  dilution;  Diluted  EPS  reflects  potential  dilution  from the
exercise or conversion of securities  into common stock or from other  contracts
to issue common stock,  and is similar to the currently  required  fully diluted
EPS. SFAS 128 is effective for financial  statements  issued for periods  ending
after December 15, 1997,  including interim periods,  and earlier application is
not permitted. When adopted, the Company will be required to restate its EPS for
all prior  periods  presented.  The  Company  does not  expect the impact of the
adoption of SFAS 128 to be material to previously reported EPS.

   Reclassification

         Certain prior year amounts have been  reclassified  to conform with the
current year's presentation.


4.   Initial Public Offering

         On July 25, 1995,  the Company  completed its Initial  Public  Offering
("IPO") of 2,500,000  shares of Common  Stock at a purchase  price of $11.00 per
share, for aggregate net proceeds of approximately  $24.7 million. On August 15,
1995,  the  underwriters  of the IPO purchased an additional  375,000  shares of
Common Stock, pursuant to the over-allotment  option, for aggregate net proceeds
of approximately $3.8 million.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

5.   Geographic Segment Information

         The Company began operations  outside the United States by establishing
a German  subsidiary,  Exogen  (Europe) GmbH, in May 1995.  For 1997,  1996, and
1995, net revenues,  operating loss, and identifiable  assets  pertaining to the
geographic areas in which the Company operates are as follows (in thousands):
<TABLE>
<CAPTION>

                                                      September 30,
                                          --------------------------------------
                                             1997          1996           1995
                                          --------      --------       ---------
<S>                                       <C>           <C>            <C>
Net revenues:
     United States .................      $  7,400      $  7,284       $  2,035
     Europe ........................         1,300           787           --
     Intercompany eliminations .....        (1,219)       (1,194)          (183)
Operating loss:
     United States .................        10,292        10,813          7,366
     Europe ........................         1,457           919            230
     Intercompany eliminations .....            49            70           --
Identifiable assets:
     United States .................        13,041        24,449         34,813
     Europe ........................         1,748         1,062             73
</TABLE>


         Intercompany    eliminations   between   geographic   areas   represent
intercompany export sales of U.S.A.-produced  goods, and are accounted for based
on  established  sales  prices  between  the  related  companies.  In  computing
operating loss for the foreign  subsidiary,  no allocations of general corporate
expenses or interest have been made.

         Identifiable  assets of the foreign  subsidiary  directly relate to its
operations.  United States assets consist of all other assets of the Company. Of
the $1.8 million of  identifiable  assets in Europe at September 30, 1997,  $1.4
million were accounts  receivable,  net of allowances for returns, bad debt, and
amounts that the Company  believes a respective  third-party  payor might deduct
from the price of the SAFHS device. The European accounts  receivable is derived
principally from sales in Germany,  where the Company has received limited local
reimbursement  on a case-by-case  basis. To assist the collection of outstanding
claims and to expedite the reimbursement  process on future claims,  the Company
is  seeking  nationwide  approval  by  the  National  Krankenkasse,  the  German
governing   organization  that  establishes  medical  reimbursement  policy  for
health-care  providers.  To this end,  in August  1997 the  Company  submitted a
formal  application  to  the  National  Krankenkasse.  The  application  process
includes a scientific assessment and a reimbursement assessment;  the Company is
currently in the  scientific-assessment  phase. In the interim,  the Company has
elected to sell SAFHS devices in Germany only when reimbursement is preapproved.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)


6.   Development Agreement Revenues

         The Company  recorded  revenues of $400,000  and $1.1 million in fiscal
1997 and 1996,  respectively,  related to  development  agreements  with  Teijin
Limited, a Japanese corporation. No such revenues were reported for fiscal 1995.
These development  agreements cover two of the Company's  technologies:  (i) the
SAFHS device and (ii) the  mechanical-stress  device under  development to treat
the loss of bone mass associated with osteoporosis. The SAFHS agreement provides
for nonrefundable  milestone payments to the Company for Teijin's development of
the product for launch in Japan.  The Company will  manufacture and supply SAFHS
devices to Teijin for clinical trials and subsequent  sales in Japan.  Teijin is
responsible for complying with the regulatory requirements and for marketing and
distributing the SAFHS device in Japan. The mechanical-stress agreement provides
for nonrefundable  milestone payments to the Company that will support, in part,
the  Company's  clinical  trials in the United  States in  exchange  for a first
option in favor of Teijin to negotiate a development and distribution  agreement
for this device for the Japanese market.

7.   Inventories

         Inventories consist of the following (in thousands):
<TABLE>
<CAPTION>
                                                             September 30,
                                                       -------------------------
                                                        1997               1996
                                                       ------             ------
<S>                                                    <C>                <C>
Finished goods ...........................             $1,218             $  768
Parts and components .....................                297                471
                                                       ------             ------
                                                       $1,515             $1,239
                                                       ======             ======
</TABLE>
8.   Furniture, Fixtures and Equipment

         Furniture,   fixtures  and  equipment  consist  of  the  following  (in
thousands):
<TABLE>
<CAPTION>
                                                              September 30,
                                                         ----------------------
                                                           1997           1996
                                                         -------        -------
<S>                                                      <C>            <C>  
Furniture, fixtures and equipment ................       $ 1,573        $ 1,421
Leasehold improvements ...........................            80             71
                                                         -------        -------
                                                           1,653          1,492
Accumulated depreciation and amortization ........          (895)          (513)
                                                         -------        -------
                                                         $   758        $   979
                                                         =======        =======
</TABLE>
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)


         Depreciation  and  amortization  expense was  $383,000,  $319,000,  and
$176,000, for the years ended September 30, 1997, 1996, and 1995, respectively.


9.   Accrued Liabilities

         Accrued liabilities consist of the following (in thousands):
<TABLE>
<CAPTION>
                                                              September 30,
                                                        ------------------------
                                                         1997              1996
                                                        ------            ------
<S>                                                     <C>               <C>
Compensation and benefits ..................            $  637            $  490
Taxes other than income ....................               446               241
Warranty expenses ..........................               156               157
Research and development ...................               312               136
Other ......................................               627               601
                                                        ------            ------
                                                        $2,178            $1,625
                                                        ======            ======

</TABLE>

10.   Redeemable Preferred Stock

         In March 1993, the Company entered into a Stock Purchase  Agreement for
the sale of an  aggregate  of  7,500,000  of its  authorized  shares of Series A
Preferred Stock issuable in two tranches at a purchase price of $1.00 per share.
The first tranche of 1,846,154  shares of Series A Preferred Stock was issued in
March 1993,  and was  convertible  into an aggregate of 923,073 shares of Common
Stock at an  as-converted  price of $2.00  per  share.  The  second  tranche  of
5,653,846 shares of Series A Preferred  Stock,  issuance of which was contingent
upon  receipt of the  Company's  PMA for its SAFHS  device  (which  occurred  in
October 1994), was issued in October 1994, and was convertible into an aggregate
of 2,826,918 shares of Common Stock at an as-converted price of $2.00 per share.
Of the second tranche,  753,846  Preferred  shares were issued in August 1994 at
the election of a certain stockholder.

         Shares of Redeemable Preferred Stock outstanding at September 30, 1994,
were 2,600,000.

         In November 1994, the Company  entered into a Stock Purchase  Agreement
for the sale of an aggregate of 3,680,303 of its  authorized  shares of Series B
Preferred  Stock at a  purchase  price of  $2.75,  which was  converted  into an
aggregate of 1,840,145 shares of Common Stock at an as-converted  price of $5.50
per share.

         On July 25, 1995,  concurrent with the completion of the Company's IPO,
11,180,303  shares of Redeemable  Preferred  Stock were converted into 5,590,136
shares of Common Stock.

<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

11.   Commitments and Contingencies

         The Company  leases a facility  in  Piscataway,  New Jersey;  the lease
commenced  May 1995 and has a remaining  term of four  years.  The length of the
lease is subject to  adjustment,  under  certain  conditions,  as defined in the
lease agreement.

         The approximate  minimum annual rentals for the  above-mentioned  lease
are as follows (in thousands):
<TABLE>
<CAPTION>

                                                               Operating Lease
                                                               ---------------
<S>                                                               <C>
         1998...............................................      $     457
         1999...............................................            464
         2000...............................................            471
         2001...............................................            478
                                                                  --------- 
                                                                  $   1,870
                                                                  =========
</TABLE>
         Rent expense was $493,000,  $353,000,  and $233,000 for the years ended
September 30, 1997, 1996, and 1995, respectively.

         The Company is also  committed to pay  royalties on sales of certain of
its  products.  Royalty  expense in fiscal 1997,  1996,  and 1995 was  $417,000,
$346,000, and $112,000, respectively.

         The  Company's  SAFHS  device is  currently  both  manufactured  by the
Company  and  produced by a contract  manufacturer.  The  agreement  between the
Company  and this  manufacturer  is  documented  by  specific  purchase  orders,
effective to June 1999,  covering  anticipated  requirements.  At September  30,
1997,  these  purchase  orders  amounted to commitments  of  approximately  $1.5
million.

         In March 1996, the Company  settled a legal action brought  against the
Company on March 15, 1995, by a former sales  representative of the Company. The
settlement was recorded in Other expense, net.

         The Company is also a party to two  lawsuits  (one  initiated in fiscal
1995, the other in fiscal 1997) that to date have not been settled.  The Company
does not  believe  that these  lawsuits  have any  merit,  and  accordingly,  no
provision  has  been  established  in the  accompanying  consolidated  financial
statements.  Management  believes  that these  lawsuits will not have a material
adverse effect on the Company's financial  position,  its results of operations,
or its cash flows.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)


12.   Stock Option Plans and Stockholders' Equity

   Stock Option and Stock Option / Stock Issuance Plans

         The Company's 1995 Stock  Option/Stock  Issuance Plan (the "1995 Plan")
was adopted by the Board of Directors and  stockholders  as of May 25, 1995, for
the purpose of  attracting  and  retaining  the  services of selected  employees
(including  officers and directors) and  consultants.  The Plan is the successor
equity  incentive  program to the  Company's  1993 Stock  Option Plan (the "1993
Plan"),  and options  outstanding under the 1993 Plan were incorporated into the
1995 Plan. The 1995 Plan provides for options designated as either  nonqualified
or incentive  stock options with a term of no more than 10 years.  The 1995 Plan
became  effective  with the IPO and will  terminate  on April 30,  2005,  unless
sooner terminated by the Board of Directors. A total of 750,000 shares of Common
Stock has been  authorized  for issuance  under the 1995 Plan, and 64,961 shares
remained  available  for future  grant as of September  30, 1997. 

         The  1995  Plan is  divided  into  four  separate  components:  (i) the
Discretionary Option Grant Program, under which employees, nonemployee directors
(other than the members of the Compensation Committee),  and consultants may, at
the discretion of the plan administrator,  be granted options to purchase shares
of Common  Stock at an exercise  price of not less than the fair market value of
the Common Stock on the grant date,  and under which stock  appreciation  rights
may be issued that will allow the holders to surrender their outstanding options
for an  appreciation  distribution,  in cash or Common Stock,  from the Company;
(ii) the Stock  Issuance  Program,  under  which such  persons  may, in the plan
administrator's  discretion, be issued shares of Common Stock directly,  through
the  purchase of such  shares at a price not less than the fair market  value of
the Common  Stock at the time of issuance or as a bonus tied to the  performance
of  services;  (iii) the Salary  Investment  Option Grant  Program,  under which
selected  officers and other key executives may elect to have a portion of their
base salaries applied each year to the acquisition of options to purchase shares
of Common Stock at an aggregate  discount  from the then fair market value equal
to their  salaries'  investment;  and (iv) the Automatic  Option Grant  Program,
under which option grants will  automatically  be made at periodic  intervals to
eligible nonemployee directors to purchase shares of Common Stock at an exercise
price  equal to 100% of the fair market  value of the Common  Stock on the grant
date.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

         Stock option activity pursuant to the 1993 and 1995 Plans is summarized
as follows:
<TABLE>
<CAPTION>
                                                              Exercise Price
                                                     ------------------------------
                                                                          Weighted-
                                         Shares         Low       High     Average
                                         ------         ---       ----     -------
<S>                                    <C>           <C>       <C>        <C>
Balance at September 30, 1994 ....       55,000      $   0.02  $    0.02  $    0.02
     Granted .....................      296,450      $   0.02  $   13.00  $    5.88
     Exercised ...................         (125)     $   0.02  $    0.02  $    0.02
     Canceled/Forfeited ..........       (2,025)     $   0.02  $    5.50  $    3.28
                                       --------
Balance at September 30, 1995 ....      349,300      $   0.02  $   13.00  $    4.98
     Granted .....................      173,250      $   8.00  $   25.50  $   15.27
     Exercised ...................      (19,989)     $   0.02  $   10.00  $    1.84
     Canceled/Forfeited ..........      (12,524)     $   0.02  $   18.50  $    4.49
                                       --------
Balance at September 30, 1996 ....      490,037      $   0.02  $   25.50  $    8.76
     Granted .....................      450,175      $   3.50  $    4.75  $    4.17
     Exercised ...................      (31,952)     $   0.02  $    0.60  $    0.39
     Canceled/Forfeited ..........     (275,287)     $   0.02  $   25.50  $   11.89
                                       --------
Balance at September 30, 1997 ....      632,973      $   0.02  $   25.50  $    4.55
                                       ========
</TABLE>


         At  September  30,  1997,  1996,  and 1995,  stock  options to purchase
119,124,  86,417,  and  15,999  shares  of  Common  Stock  were  exercisable  at
weighted-average prices of $5.21, $6.71, and $0.02, respectively.

         During  fiscal  1997,  148,000  options  previously  issued to  certain
consultants and employees with a weighted-average  exercise price of $14.96 were
canceled and reissued at the fair market value of the Company's  Common Stock on
the date of  reissuance.  The  weighted-average  exercise  price of the reissued
options was $4.15 per share and the vesting  period of these  options  commenced
from the reissuance date.

         Options generally become exercisable in ratable installments over four-
to five-year periods.  In the opinion of management,  options were issued at the
fair market value of the Company's Common Stock on the date of grant.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

         The  following  table  summarizes   information   about  stock  options
outstanding at September 30, 1997:
<TABLE>
<CAPTION>
                                             Options Outstanding                Options Exercisable
                                         ------------------------------     ----------------------------
                                           Weighted-
                                           Average            Weighted-                        Weighted-
                        Shares            Remaining            Average       Shares             Average
  Range of            Outstanding        Contractual           Exercise     Exercisable         Exercise
Exercise Prices        at 9/30/97           Life                Price        at 9/30/97          Price
- ---------------        ----------           ----                -----        ----------          -----
<S>                      <C>              <C>                 <C>             <C>              <C>      
 $0.02 - $0.60           110,873          7.08 years          $    0.41        49,324          $    0.31
 $3.50 - $3.50            33,000          9.21 years          $    3.50          --            $   --
 $4.00 - $4.00           267,475          9.32 years          $    4.00         5,000          $    4.00
 $4.50 - $4.75           122,000          9.34 years          $    4.73        23,750          $    4.67
 $5.50 - $5.50            16,500          7.51 years          $    5.50         8,256          $    5.50
 $8.00 - $8.00            40,750          8.38 years          $    8.00        12,876          $    8.00
$11.00 - $13.00           25,750          8.09 years          $   12.51        11,293          $   12.45
$18.50 - $25.50           16,625          8.31 years          $   20.08         8,625          $   21.54
                        --------                                              -------
$0.02 - $25.50           632,973          8.74 years          $    4.55       119,124          $    5.21
                        ========                                              =======

</TABLE>

         There were no direct  issuances of Common  Stock or stock  appreciation
rights under the 1995 Plan as of September 30, 1997.

   Employee Stock Purchase Plan

         The Company's  Employee Stock  Purchase Plan (the "Purchase  Plan") was
adopted by the Board of  Directors  and  stockholders  as of May 25,  1995.  The
Purchase Plan,  which is in accordance with Section 423 of the Internal  Revenue
Code, is designed to allow eligible  employees of the Company and  participating
subsidiaries  to purchase  shares of Common  Stock,  at  semi-annual  intervals,
through periodic payroll  deductions.  Payroll  deductions may not exceed 10% of
the  participant's  total cash  earnings  in each  semi-annual  period,  and the
purchase price per share will be  eighty-five  percent (85%) of the lower of (i)
the fair market  value of the Common  Stock on the  participant's  date of entry
into  the  offering  period  or (ii) the fair  market  value on the  semi-annual
purchase date.

         A total of  150,000  shares  of  Common  Stock  has been  reserved  for
issuance  under the Purchase  Plan.  Stock issued  pursuant to the Purchase Plan
during fiscal 1997, 1996, and 1995 was 56,996,  38,944 and 0,  respectively,  at
weighted-average purchase prices of $3.60, $6.47 and $0.00, respectively.  As of
September 30, 1997, 54,060 shares remained  available for future grant under the
Purchase Plan.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

         The  Purchase  Plan will  terminate  upon the  earliest of (i) the last
business  day in July  2005,  (ii) the date on which all  shares  available  for
issuance  under the  Purchase  Plan have been sold  pursuant to purchase  rights
exercised  under the  Purchase  Plan,  or (iii)  the date on which all  purchase
rights are exercised in connection  with a Corporate  Transaction  as defined in
the Purchase Plan.

   Stock Warrants

         In  September  1997,  the  Company  and a  consultant  entered  into an
advisory agreement whereby the consultant acquired a warrant (at a cost of $0.20
per share) to purchase up to 100,000 shares of the Company's  Common Stock at an
exercise price of $4.50 per share.  The warrant is fully vested and  immediately
exercisable  and  expires  five  years  after  issuance  subject,   however,  to
expiration  on August 1, 1998,  in the event that the Company does not, by April
30,  1998,  consummate  a  strategic  partnering  transaction  relating  to  the
commercialization of certain of the Company's non-invasive  technologies (each a
"Strategic  Partnering  Transaction").  Further, for each of the three Strategic
Partnering  Transactions  described in the advisory  agreement and  subsequently
entered into by the Company,  the consultant will receive a warrant (at no cost)
to purchase 75,000 shares of the Company's  Common Stock at an exercise price of
$4.50 per share  (the  "Transaction  Warrant").  For each  Strategic  Partnering
Transaction consummated prior to April 30, 1998, the consultant will receive, in
lieu of the foregoing  Transaction  Warrant,  a Transaction  Warrant to purchase
125,000  shares of the Company's  Common Stock at an exercise price of $4.50 per
share (subject to  adjustment).  Such  Transaction  Warrants,  if issued,  would
expire five years after issuance.

         As of  September  30,  1997,  the  warrant  was  not  exercised  and no
additional warrants were due to the consultant.

   Fair Value Disclosures

         Stock options granted to employees (and nonemployee  directors) are set
at the closing price of the Company's Common Stock on the date of grant, and the
related  number of shares  granted  are fixed at that point in time.  Therefore,
under the  principles  of APB 25, the Company  does not  recognize  compensation
expense  associated  with  the  grant  of  such  options.  Additionally,   under
provisions of APB 25, employee stock purchase plans such as the Company's do not
require the recognition of compensation expense.  However,  under the provisions
of SFAS 123, the Company is required to use an option valuation model to provide
supplemental pro forma  information  regarding  options granted and stock issued
under the employee stock purchase plan after September 30, 1995.

         Stock  options and warrants  issued to  consultants  are  accounted for
under SFAS 123.  Compensation  expense  recognized for such options and warrants
was  $182,000  and  $52,000  for the years  ended  September  30, 1997 and 1996,
respectively.

         The fair value of the options and warrants was estimated at the date of
grant  using  the   Black-Scholes   option  pricing  model  with  the  following
weighted-average  assumptions for fiscal 1997 and 1996, respectively:  risk-free
interest  rates of 6.13% and  5.67%;  dividend  yields of 0% and 0%;  volatility
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

factors for the expected market price of the Company's Common Stock of 38.4% and
40.6%;  and  expected  lives of the options of 3.55 years and 4.44 years.  These
assumptions  resulted  in  weighted-average  fair  values of $1.45 and $6.17 per
share for stock  options and  warrants  granted to  employees  (and  nonemployee
directors) and consultants in fiscal 1997 and 1996, respectively.

         The fair value of shares under the Company's  employee  stock  purchase
plan  was  estimated  at the  subscription  date  (i.e.,  "enrollment"  date) of
participants  into the respective  offering periods under the purchase plan. The
estimate was based upon a Black-Scholes  option pricing model with the following
weighted-average  assumptions for purchase  periods during fiscal 1997 and 1996,
respectively: risk-free interest rates of 6.05% and 5.48%; dividend yields of 0%
and 0%; volatility factors for the expected market price of the Company's Common
Stock of 37.0% and 50.1%; and expected term length of 1.94 years and 1.17 years.

         Pro forma  information  regarding  net loss and net loss per share,  as
shown below,  was  determined  as if the Company had  accounted for its employee
stock options and shares sold under its employee  stock  purchase plan under the
fair  value  method of SFAS 123.  For  purposes  of pro forma  disclosures,  the
estimated fair value is amortized over the applicable vesting periods. Since the
SFAS 123 method of accounting  has not been applied during fiscal years prior to
October 1, 1995,  the  resulting  pro forma  compensation  expense  might not be
representative  of that to be expected in future years.  The Company's pro forma
information is as follows (in thousands, except per share information):
<TABLE>
<CAPTION>
                                                    Years Ended September 30,
                                                 -------------------------------
                                                     1997                1996
                                                 -----------         -----------
<S>                                              <C>                 <C>
Net loss:
     As reported .......................         $  (11,152)         $  (10,588)
     Pro forma .........................         $  (11,370)         $  (10,733)


Net loss per share:
     As reported .......................         $    (1.12)         $    (1.07)
     Pro forma .........................         $    (1.14)         $    (1.09)
</TABLE>

   Restricted Stock Agreements

         All holders of Common  Stock  issued prior to the IPO have entered into
restricted stock purchase agreements that grant certain repurchase rights to the
Company upon the sale, assignment,  transfer,  encumbrance, or other disposition
of the Company's  shares or upon  termination  of service with the Company.  The
repurchase  rights  terminate  over time with  respect  to any and all shares in
which the purchaser's  interest has vested.  Of the Common Stock issued prior to
the IPO,  1,357,332 and 1,060,836 shares are vested as of September 30, 1997 and
1996, respectively.  The unvested 27,666 shares at September 30, 1997, vest over
the next two months.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

   The Stockholder Rights Plan

         The Company's Second Amended and Restated Certificate of Incorporation,
dated July 25, 1995,  grants the Board of Directors the authority to issue up to
3,000,000 shares of preferred stock of the Company,  $0.0001 par value per share
(the  "Preferred  Stock"),  in one  or  more  series  and  to  fix  the  rights,
preferences,  privileges,  and restrictions thereof,  including dividend rights,
dividend  rates,   conversion  rights,   voting  rights,  terms  of  redemption,
redemption   prices,   liquidation   preferences,   and  the  number  of  shares
constituting any series or the designation of such series,  without further vote
or action by the stockholders.

         Effective  December  6, 1996,  pursuant to a  Preferred  Shares  Rights
Agreement  (the  "Rights  Agreement")  between  the Company  and  Registrar  and
Transfer Company,  as Rights Agent (the "Rights Agent"),  the Company's Board of
Directors  declared  a  dividend  of one  right  (a  "Right")  to  purchase  one
one-hundredth  share of the Company's  Series A  Participating  Preferred  Stock
("Series  A  Preferred")  for  each  outstanding  share of  Common  Stock of the
Company.  The dividend was payable on December 19, 1996 (the "Record Date"),  to
stockholders  of record as of the close of  business  on that  date.  Each Right
entitles the registered holder to purchase from the Company one one-hundredth of
a share of Series A  Preferred  at an exercise  price of $30.00  (the  "Purchase
Price"),  subject to adjustment in the event the Company  declares a dividend on
the Common Stock payable in Common Stock,  subdivides  the number of outstanding
shares of Common  Stock into a larger  number of such  shares,  or combines  the
number  of  outstanding  shares of Common  Stock  into a smaller  number of such
shares,  among other  circumstances.  In addition,  under certain  circumstances
described more fully in the Rights Agreement,  the Rights may become exercisable
for a number of shares of  Common  Stock  having a value  equal to two times the
Purchase Price.

         The Rights will expire December 19, 2006, which should give the Company
adequate  time to determine  whether any further  protection  is  required.  The
Rights may be redeemed by the Company at the direction of the Board of Directors
at one cent per Right prior to 10 business days after the accumulation,  through
open-market  purchases,  a tender  offer,  or  otherwise,  of 15% or more of the
combined number of the Company's  shares of Common Stock by a single acquirer or
group,  and  thereafter in certain  circumstances.  Thus,  the Rights should not
interfere  with any  merger or  business  combination  approved  by the Board of
Directors prior to that time.

13.  Income Taxes

         As a result of the losses  generated,  the Company has no provision for
income taxes.  The Company has recorded a full valuation  allowance  against its
deferred  tax  assets as  realizability  of such  asset is  predicated  upon the
Company's  achieving  profitability.  The change in valuation  allowance  during
1997, 1996, and 1995 was $5,050,000, $3,478,000, and $2,813,000, respectively.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

         The types of temporary  differences between the tax bases of assets and
liabilities and their financial reporting amounts that give rise to the deferred
tax asset and their approximate tax effects are as follows (in thousands):
<TABLE>
<CAPTION>
                                                             September 30,   September 30,
                                                                  1997           1996
                                                             -------------   -------------
<S>                                                             <C>            <C>
Deferred Tax Asset:
    Start-up costs .....................................        $   488        $   732
    Research and development costs .....................            548            548
    Research and development and related patent acquired              7            184
    Vacation accrual ...................................             52             18
    Allowances for returns, disallowances, and bad debts            650            555
    Net operating loss .................................          9,936          5,736
    German net operating loss ..........................          1,135            575
    Other ..............................................            708            126
                                                                -------        -------
    Deferred tax asset .................................         13,524          8,474

Less: Valuation Allowance ..............................        (13,524)        (8,474)
                                                                -------        -------
                                                                $     0        $     0
                                                                =======        =======
</TABLE>
         At September 30, 1997, the Company has net operating loss carryforwards
for United States  federal income tax purposes of  approximately  $24.8 million.
These net operating loss  carryforwards  expire on various dates beginning 2007.
The Company's ability to utilize its net operating loss carryforwards is subject
to annual  limitations  in future  periods  pursuant to the "change in ownership
rules" under Section 382 of the Internal Revenue Code, as amended.  At September
30,  1997,  the Company also has net  operating  loss  carryforwards  for German
income tax purposes of $2.3 million, which are not subject to any limitations.


14.  Supplemental Disclosure of Cash Flow Information

         Cash paid for interest was $12,000, $9,000, and $169,000 in 1997, 1996,
and 1995, respectively.

         The Company paid $4,000 in income taxes in fiscal 1997. No income taxes
were paid in fiscal 1996 or 1995.

         The Company  recorded  $0, $0, and $35,000 of  amortization  related to
Preferred Stock issuance costs in 1997, 1996, and 1995, respectively.


15.  Subsequent Events

         On October 20,  1997,  the Company  completed  a $7.5  million  private
placement of  1,799,019  shares of its Common  Stock.  The  participants  in the
private placement included several shareholders of record on September 30, 1997,
and two new investment groups. The Company will use the financing's proceeds for
general corporate purposes.
<PAGE>
                                  EXOGEN, INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)

         On November 14, 1997,  the Board of Directors of the Company  approved,
subject to stockholder approval at the 1998 Annual Meeting of Stockholders,  (i)
an amendment to the 1995 Stock Option / Stock Issuance Plan, which
includes  an  increase  in the number of shares of Common  Stock  available  for
issuance  thereunder  from 750,000 to 1,350,000  shares and (ii) an amendment to
the  Employee  Stock  Purchase  Plan to increase  the number of shares of Common
Stock  available  for  issuance  thereunder  from  150,000  to  350,000  shares.
Information  regarding the  amendments to the 1995 Stock Option / Stock Issuance
Plan and Employee Stock  Purchase Plan is set forth in the Company's  Definitive
Proxy Statement,  which the Company expects will be mailed to stockholders on or
about  January  8,  1998,  in  connection   with  the  1998  Annual  Meeting  of
Stockholders.

<PAGE>
<TABLE>
<CAPTION>
                                                   EXOGEN, INC.

                                  SCHEDULE II--VALUATION AND QUALIFYING ACCOUNTS
                                  ----------------------------------------------
                                                  (in thousands)



                                                            Additions
                                                   --------------------------
                                     Balance at    Charged to      Charged to                            Balance
                                    Beginning       Costs and        Other                               at End
      Description                    of Period      Expenses        Accounts         Deductions         of Period
      -----------                    ---------      --------        --------         ----------         ---------
<S>                                    <C>           <C>           <C>               <C>                 <C>
Year ended September 30, 1995

Allowance for returns, bad
debt, and price deductions
by third-party payors .........        $ --          $  352        $     --          $   154 (a)         $  198

Year ended September 30, 1996

Allowance for returns, bad
debt, and price deductions
by third-party payors .........        $  198        $1,667        $     --          $ 1,519 (a)         $  346

Year ended September 30, 1997

Allowance for returns, bad
debt, and price deductions
by third-party payors .........        $  346        $3,811        $(58) (b)         $ 2,313 (a)         $1,786

</TABLE>


  (a) Returns and write-offs.
  (b) Foreign currency translation adjustments.


                                                                   EXHIBIT 10.17


May 27, 1997


Mr. John Bohan
3 St.Andrews Court
New Hope, PA 18938

Dear John:

This letter serves to review the terms of your  separation  from employment with
Exogen, Inc. (the "Company"):

     1.   Your  employment  with Exogen will  terminate  effective May 31, 1997.
          According to Exogen's  Severance Pay Plan, you are eligible to receive
          severance pay equal to one-half  month's base salary.  If you sign the
          attached General Release Of All Claims ("General  Release") within the
          period  specified  in the  General  Release and do not revoke it after
          seven (7) days,  you are eligible for enhanced  severance pay benefits
          equal to two and one- half  months.  Since you are an  officer  of the
          Company, Exogen's Compensation Committee has approved a total enhanced
          severance pay equal to six months base salary.  Exogen's Severance Pay
          Plan and Summary Plan  Description  are attached and provide  complete
          details  regarding your  separation  terms and severance.  Please read
          this document in its entirety.

     2.   On May 31,  1997  you will be paid  your  regular  semi-monthly  gross
          wages.  On June 15, 1997 you will be paid wages which  includes all of
          your accrued and unused  vacation  days, and you will also be refunded
          for your unused  contributions  under Exogen's Employee Stock Purchase
          Plan. Other than the payments  mentioned in this paragraph,  you agree
          that prior to the  execution  of this letter you were not  entitled to
          receive any further  monetary  payments or benefits  from the Company,
          and that the only  payments  and  benefits  that you are  entitled  to
          receive  from the  Company in the future are those  specified  in this
          letter.

     3.   As of May 31,  1997 you will  have  vested  10,000  options  which are
          exercisable  into  Exogen  Common  Stock  under  an  option  agreement
          previously  granted  to you by  Exogen.  You have up to  three  months
          following termination of your employment (i.e., until August 31, 1997)
          in which to exercise  the options for any or all of the option  shares
          which  are  vested as of May 31,  1997.  Except  as so  modified,  the
          agreements evidencing your options remain in full force and effect. In
          addition, pursuant to the Stock Purchase Agreement between you and the
          Company  dated  February  5,  1994,  the  Company  currently  has  the
          Repurchase  Rights for 25,000  shares.  The  Repurchase  Rights do not
          lapse on those shares until February 5, 1998,  however,  the Company's
          Board of Directors has chosen not to exercise its rights to repurchase
          those  shares.  The  certificates  held in escrow  will be sent to you
          within the next ten days.

     4.   It is our expectation  that all Company owned property,  including but
          not limited to  marketing  materials,  computer  equipment  and credit
          cards, given to you in support of executing your responsibilities will
          be returned to Exogen by May 31, 1997.
<PAGE>

     5.   Your  health  care  benefits  which  include  health  insurance,  life
          insurance and LTD  insurance,  as it currently  exists,  will continue
          until May 31, 1997.  Information  regarding  COBRA will be sent to you
          under separate cover.  Exogen's Severance Pay Plan includes payment of
          your COBRA  premiums  for the period  covered by your  severance  pay,
          subject to the conditions  discussed in #1 above regarding the signing
          of the General Release.

     6.   At all  times  in the  future,  you  will  remain  bound  by  Exogen's
          Proprietary   Information   and   Inventions,   Non-Solicitation   and
          Non-Competition Agreement signed by you on February 5, 1994, a copy of
          which is attached.

Please review the attached documents as soon as possible.  If you decide to sign
the  General  Release,  do so by the  required  date and return it  directly  to
Exogen's Human Resources Department.



Sincerely,


/s/Patrick A. McBrayer
- ----------------------
Patrick A. McBrayer
President & CEO



Please sign below in acknowledgment of this separation agreement.

- ----------------------------------------
John Bohan                          Date

                                                                  EXHIBIT 10.18















                                  EXOGEN, INC.


                         COMMON STOCK PURCHASE AGREEMENT



                                October 20, 1997



<PAGE>
                                TABLE OF CONTENTS

                                                                                

         1.       Purchase and Sale of Stock....................................
                  1.1      Sale and Issuance of Common Stock....................
                  1.2      Closing..............................................
                  1.3      Actions at the Closing...............................

         2.       Representations and Warranties of the Company.................
                  2.1      Organization and Good Standing; Power and Authority;
                               Qualifications...................................
                  2.2      Authorization........................................
                  2.3      Capitalization.......................................
                  2.4      Valid Issuance of Common Stock.......................
                  2.5      Consents.............................................
                  2.6      Litigation...........................................
                  2.7      Compliance with Other Instruments....................
                  2.8      Financial Statements.................................
                  2.9      SEC Filings..........................................
                  2.10     Other Information....................................
                  2.11     Intellectual Property Rights.........................
                  2.12     Title to Assets and Properties; Insurance............
                  2.13     Compliance with Laws; Permits........................
                  2.14     Offering Exemption...................................
                  2.15     Taxes................................................

         3.       Representations and Warranties of the Investor................
                  3.1      Authorization........................................
                  3.2      Purchase Entirely for Own Account....................
                  3.3      Disclosure of Information............................
                  3.4      Investment Experience................................
                  3.5      Accredited Investor..................................
                  3.6      Restricted Securities................................

         4.       Certain Covenants.............................................
                  4.1      Use of Proceeds......................................
                  4.2      Rule 144 Reporting...................................

         5.       Transfer Taxes................................................

         6.       Expenses......................................................

         7.       Indemnification...............................................
                  7.1      General Indemnification..............................
                  7.2      Indemnification Principles...........................
                  7.3      Claim Notice.........................................

         8.       Remedies......................................................
<PAGE>
         9.       Miscellaneous.................................................
                  9.1      Survival of Warranties...............................
                  9.2      Successors and Assigns...............................
                  9.3      Governing Law........................................
                  9.4      Counterparts.........................................
                  9.5      Titles and Subtitles.................................
                  9.6      Notices..............................................
                  9.7      Finder's Fee.........................................
                  9.8      Attorneys' Fees......................................
                  9.9      Amendments and Waivers...............................
                  9.10     Severability.........................................
                  9.11     Entire Agreement.....................................
                  9.12     Press Releases and Announcements.....................



SCHEDULE 1    -   List of Investors, addresses, number of shares of Common Stock
                  being purchased and purchase price due from each Investor

EXHIBIT A     -   Registration Rights Agreement

EXHIBIT B-1   -   Certificate for Individual Investors

EXHIBIT B-2   -   Certificate for Corporate, Partnership, Trust, Foundation and 
                  Joint Investors

EXHIBIT C     -   Secretary's Certificate

EXHIBIT D     -   Opinion of Brobeck, Phleger & Harrison LLP
<PAGE>
                         COMMON STOCK PURCHASE AGREEMENT
                         -------------------------------


                  THIS STOCK  PURCHASE  AGREEMENT  is made as of the 20th day of
October,  1997,  by and  between  Exogen,  Inc.,  a  Delaware  corporation  (the
"Company"),  and the  investors  listed on Schedule 1 attached  hereto,  each of
which is herein referred to as an "Investor".

                  THE PARTIES HEREBY AGREE AS FOLLOWS:

                  1.       Purchase and Sale of Stock.

                  1.1 Sale and  Issuance of Common  Stock.  Subject to the terms
and  conditions  of this  Agreement,  each  Investor  agrees to  purchase at the
Closing and the Company agrees to sell and issue to the Investor at the Closing,
that number of shares of the Company's common stock,  $.0001 par value per share
("Common  Stock"),  and at a purchase price per share,  as is set forth opposite
each Investor named on Schedule 1 attached hereto (such transaction  referred to
as the "Purchase").  The maximum aggregate number of shares of Common Stock sold
pursuant  to this  Agreement  shall  be One  Million  Nine  Hundred  Eighty-Nine
Thousand Six Hundred Thirty (1,989,630) shares.

                  1.2  Closing.  The purchase and sale of the Common Stock shall
take place at the offices of Brobeck,  Phleger & Harrison  LLP,  1633  Broadway,
47th floor,  New York,  New York 10019 at 10:00 a.m. New York Time,  on the date
hereof,  or at such time and place upon which the  Company and  Investors  shall
agree  (the  "Closing").  At the  Closing,  the  Company  shall  deliver to each
Investor a certificate or certificates  representing the Common Stock which such
Investor is purchasing,  registered in the name of such Investor or its nominee,
against payment of the purchase price therefor by wire transfer to the Company's
bank account  (designated at least one business day prior to the Closing) in the
amount set forth on Schedule 1.

                  1.3. Actions at the Closing. Simultaneously with, or prior to,
the execution and delivery of this Agreement, the following actions shall occur:

                           (a)   The   Registration    Rights   Agreement   (the
"Registration Rights Agreement"),  by and between the Company and the Investors,
substantially  in the  form  of  Exhibit  A  hereto,  and all  other  schedules,
certificates  and other documents  being delivered  pursuant to or in connection
with  this   Agreement   by  any  party  hereto  at  or  prior  to  the  Closing
(collectively,  the "Ancillary  Documents") shall be duly executed and delivered
by the parties thereto.

                           (b)  The  Company  shall  deliver  to  the  Investors
certificates  of good  standing  from the  jurisdictions  set forth on  Schedule
1.3(b)  under its name dated as of a date no earlier than five days prior to the
Closing.

                           (c) The  Common  Stock to be issued  shall  have been
approved for listing on The NASDAQ Stock Market,  subject to official  notice of
issuance.
<PAGE>
                           (d) The  Investors  shall  deliver  to the  Company a
completed  certificate  pertaining  to such  Investor's  status  as an  investor
substantially in the form of Exhibit B-1 or B-2, as appropriate.

                           (e) The  Company  shall  deliver to the  Investors  a
certificate executed by the secretary of the Company,  substantially in the form
of  Exhibit  C hereto,  certifying  (i) a copy of its  organizational  documents
(including the  Certificate of  Incorporation  and bylaws of the Company),  (ii)
resolutions authorizing the transaction and (iii) incumbency matters.

                           (f) The Investors shall receive from Brobeck, Phleger
& Harrison LLP, counsel for the Company,  an opinion addressed to the Investors,
dated as of the Closing,  satisfactory  in form and substance to the  Investors,
which shall include the opinions set forth in Exhibit D attached hereto.

                  2.  Representations and Warranties of the Company. The Company
hereby represents and warrants to the Investor that:

                  2.1  Organization  and Good  Standing;  Power  and  Authority;
Qualifications.  Each of the Company and its subsidiary, Exogen (Europe) GmbH, a
German  corporation (the  "Subsidiary") (i) is duly organized,  validly existing
and in good standing under the laws of its jurisdiction of organization and (ii)
has all requisite  power and authority to own,  lease and operate its properties
and to carry on its  business  as  presently  conducted  and as  proposed  to be
conducted.  The Company has all requisite  power and authority to enter into and
carry out the  transactions  contemplated  by this  Agreement  and the Ancillary
Documents  to which it is a party.  Each of the  Company and its  Subsidiary  is
qualified  to  transact  business  as a foreign  corporation  in, and is in good
standing  under the laws of,  those  jurisdictions  that  constitute  all of the
jurisdictions  wherein  the  character  of the  property  owned or leased or the
nature of the activities conducted by it makes such qualification  necessary and
where  failure to so  qualify  would  individually  or in the  aggregate  have a
material  adverse  effect  on  properties,   business,  prospects,   operations,
earnings,  assets,  liabilities or the condition (financial or otherwise) of the
Company  and its  Subsidiary  taken as a whole,  whether or not in the  ordinary
course of business (a "Material Adverse Effect").  All of the outstanding shares
of capital  stock of each class (other than director  qualifying  shares) of the
Subsidiary  have been validly issued and fully paid and  nonassessable,  and are
owned   beneficially  and  of  record,  by  the  Company,   free  and  clear  of
Encumbrances.

                  2.2  Authorization.  All  corporate  action on the part of the
Company,   its   officers,   directors  and   shareholders   necessary  for  the
authorization,  execution  and  delivery  of this  Agreement  and the  Ancillary
Documents,  the  performance  of all  obligations  of the Company  hereunder and
thereunder  and the  authorization,  issuance  and  delivery of the Common Stock
being sold  hereunder  has been  taken,  and this  Agreement  and the  Ancillary
Documents,  constitute  valid and legally  binding  obligations  of the Company,
enforceable  against  the Company in  accordance  with their  respective  terms,
except (i) as  limited by  applicable  bankruptcy,  insolvency,  reorganization,
moratorium,  and other  laws of general  application  affecting  enforcement  of
creditors'  rights   generally,   (ii)  as  limited  by  laws  relating  to  the
availability  of specific  performance,  injunctive  relief,  or other equitable
remedies,  and (iii) to the extent the indemnification  provisions  contained in
the Registration  Rights Agreement may be limited by applicable federal or state
securities laws.
<PAGE>
                  2.3  Capitalization.  The  authorized  capitalization  of  the
Company immediately following the Purchase will consist of: (a) 3,000,000 shares
of preferred stock of the Company (the "Preferred Stock"),  par value $.0001 per
share, of which no shares are issued and outstanding;  and (b) 27,000,000 shares
of Common Stock, par value $.0001 per share ("Common Stock"), of which 9,998,140
shares are issued and  outstanding and all such  outstanding  shares are validly
issued,  fully paid and nonassessable and free and clear of all Encumbrances (as
defined in Section  2.12).  No class of capital stock  ("Capital  Stock") of the
Company is entitled to  preemptive  rights.  There are no  outstanding  options,
warrants,  subscription rights, calls or commitments of any character whatsoever
relating to, or securities or rights  convertible  into,  shares of any class of
Capital  Stock of the  Company,  or  contracts,  by  which  the  Company  or its
Subsidiary  is or may become  bound to issue  additional  shares of its  Capital
Stock or options,  warrants or other rights to purchase or acquire any shares of
its Capital  Stock,  except as follows:  (i) 750,000 shares of Common Stock have
been  reserved for issuance  pursuant to the Company's  1995 Stock  Option/Stock
Issuance Plan (of which options to purchase  632,973 shares of Common Stock have
been granted and are outstanding), (ii) 150,000 shares of Common Stock have been
reserved for issuance pursuant to the Company's Employee Stock Purchase Plan (of
which  95,940  shares of Common  Stock have been  purchased  and are included in
total  shares of Common Stock  outstanding),  and (iii) as set forth on Schedule
2.3, shares of Common Stock reserved for issuance  pursuant to a certain warrant
to purchase Common Stock of the Company and certain warrant obligations.  Except
as set forth in Schedule  2.3 hereto,  the Company has not  declared or paid any
dividend or made any other  distribution of cash, stock or other property to its
stockholders.

                  2.4 Valid Issuance of Common Stock.  The Common Stock which is
being purchased by each Investor  hereunder,  when issued, sold and delivered in
accordance with the terms hereof for the consideration expressed herein, will be
duly and validly issued and outstanding,  fully paid and  nonassessable  with no
personal  liability  attaching to the ownership  thereof,  free and clear of any
Encumbrances,  other than  Encumbrances,  if any, arising as a result of actions
taken by the  Investors,  and not  subject to  preemptive  or similar  rights of
stockholders of the Company or others.

                  2.5  Consents.  Except as disclosed on Schedule 2.5 hereto and
for  any  post-Closing  notifications  or  filings  as  may  be  required  under
applicable  federal or state  securities  laws, if any, which shall be made on a
timely basis, no consent,  approval, order or authorization of, or registration,
qualification, designation, declaration or filing with, any person (governmental
or  private)  on the  part of the  Company  or its  Subsidiary  is  required  in
connection  with  the  consummation  of the  transactions  contemplated  by this
Agreement and the Ancillary Documents.

                  2.6  Litigation.  Except as set forth in the SEC Documents (as
defined below),  there is no civil,  criminal or  administrative  action,  suit,
claim, notice, hearing, inquiry, proceeding or investigation at law or in equity
by  or  before   any  court,   arbitrator   or   similar   panel,   governmental
instrumentality  or other  agency now pending or, to the best  knowledge  of the
Company,  threatened  against  the  Company  or its  Subsidiary  or any of their
respective  directors or executive officers in their capacities as directors and
executive  officers of the  Company or the assets  (including  the  Intellectual
Property) of the Company or its Subsidiary (a "Litigation"). Neither the Company
nor its Subsidiary is a party or subject to the  provisions of any order,  writ,
injunction,   judgment  or  decree  of  any  court  or   government   agency  or
instrumentality.  There is no action,  suit,  proceeding or investigation by the
Company or its  Subsidiary  currently  pending or which either of the Company or
its Subsidiary intends to initiate.
<PAGE>
                  2.7 Compliance with Other  Instruments.  The Company is not in
violation or default of any  provisions  (a) of its Second  Amended and Restated
Certificate of Incorporation,  as amended, or Amended and Restated Bylaws or (b)
of any instrument,  judgment,  order,  writ, decree or contract to which it is a
party or by which it is bound,  or to its best  knowledge,  of any  provision of
domestic (federal,  state or local) or foreign law, statute,  rule or regulation
applicable  to the  Company  except,  with  respect  to clause  (b),  where such
violation would not,  individually or in the aggregate,  have a Material Adverse
Effect.  The  execution,  delivery and  performance  of this  Agreement  and the
Ancillary  Documents  by the Company and the  consummation  of the  transactions
contemplated  hereby and thereby will not (x) result in any such violation or be
in conflict with or  constitute,  with or without the passage of time and giving
of notice,  either a default  under any such  agreement,  instrument,  judgment,
order, writ, decree or contract referred to in the previous sentence  (including
any registration rights agreements),  or (y) result in the creation of any lien,
charge or  Encumbrance  upon any assets of the Company or its  Subsidiary or the
suspension,  revocation,  impairment,  forfeiture, or nonrenewal of any material
permit,  license,  authorization,  or approval  applicable to the Company or its
Subsidiary, their business or operations or any of their assets or properties.

                  2.8 Financial Statements.  The financial statements (including
any related schedule and/or notes) included in the SEC Documents (the "Financial
Statements")  are complete  and correct in all  material  respects and have been
prepared in accordance with generally accepted accounting  principles applied on
a consistent basis throughout the periods  indicated.  The Financial  Statements
fairly  present the  consolidated  financial  condition,  operating  results and
changes in  shareholders'  equity of the  Company  as of the dates,  and for the
periods,  indicated  therein.  Except  as set  forth in the SEC  Documents,  the
Company has no liabilities or obligations,  contingent or otherwise,  except (i)
liabilities  and  obligations  in the respective  amounts  reflected or reserved
against in the Company's balance sheet (the "Balance Sheet") as of June 30, 1997
included in the SEC Documents or (ii)  liabilities and  obligations  (matured or
unmatured,  fixed or  contingent)  incurred  since June 30, 1997 in the ordinary
course of business  consistent  (in amount and kind) with past practice (none of
which is a liability  resulting  from breach of  contract,  breach of  warranty,
tort, infringement,  claim or lawsuit) which individually or in the aggregate do
not have a Material  Adverse  Effect.  Since June 30, 1997,  the Company and its
Subsidiary  have operated their  business only in the ordinary  course and there
has not been  individually  or in the  aggregate  any  change  that would have a
Material  Adverse  Effect (a  "Material  Adverse  Change")  other  than  changes
disclosed in the SEC  Documents  or otherwise  set forth in Schedule 2.8 hereto.
Except as set forth in the SEC Documents, the Company has never had, nor does it
presently have, any  subsidiaries,  nor has it owned, nor does it presently own,
whether  directly or indirectly  owned,  any capital stock or other  proprietary
interest,  directly  or  indirectly,  in any  corporation,  association,  trust,
partnership, joint venture or other entity.

                  2.9 SEC Filings.  The Company has filed all proxy  statements,
reports  and other  documents  required  to be filed by it under the  Securities
Exchange Act of 1934,  as amended (the  "Exchange  Act") from and after July 20,
1995 (the "SEC Documents"), and the Company has delivered to the Investor:

         (a) its quarterly  report on Form 10-Q for the quarter  ended  December
             31, 1996;

         (b) its  quarterly  report on Form 10-Q for the quarter ended March 31,
             1997;
<PAGE>
         (c) its  quarterly  report on Form 10-Q for the quarter  ended June 30,
             1997;

         (d) its annual report on Form 10-K for the fiscal year ended
             September 30, 1996; and

         (e) its  proxy  statement  to  stockholders  as  filed  with the SEC on
             January 8, 1997.

                  Each SEC Document was in compliance in all materials  respects
with the requirements of its respective  report form and, as of its filing date,
no such SEC  Document  filed by the Company  with the  Securities  and  Exchange
Commission  ("SEC") contained any untrue statement of a material fact or omitted
to state any material fact  required to be stated  therein or necessary in order
to make the statements  made therein,  in the light of the  circumstances  under
which they were made, not misleading.

                  2.10 Other  Information.  The  Company has  delivered  to each
Investor  copies  of all  press  releases,  reports  to  stockholders  and other
documents released to the public since October 1, 1996.

                  2.11. Intellectual Property Rights. (a) Except as disclosed on
Schedule 2.11(a) hereto,  the Company or its Subsidiary owns or has the right to
use all of the Intellectual  Property (as defined below) necessary,  required or
desirable for the conduct of its business as presently or as presently  proposed
to be conducted,  except where the absence of any thereof would not individually
or in the aggregate have a Material Adverse Effect.

                  (b)  Except as  disclosed  on  Schedule  2.11(b),  to the best
knowledge of the Company, the Company has not interfered with, infringed upon or
misappropriated  any Intellectual  Property rights of third parties,  except for
interferences,  infringements and misappropriations which would not individually
or in the  aggregate  have a Material  Adverse  Effect,  and the Company has not
received  any  claim,   demand  or  notice   alleging  any  such   interference,
infringement  or  misappropriation  (including any claim that it must license or
refrain from using any Intellectual  Property rights of any third party). To the
best  knowledge of the Company,  no third party has interfered  with,  infringed
upon or misappropriated any Intellectual Property rights of the Company,  except
for  interferences,   infringements  and   misappropriations   which  would  not
individually or in the aggregate have a Material Adverse Effect.

                  As used in this Agreement,  "Intellectual  Property" means all
intellectual  property owned, leased,  licensed,  and used by the Company or its
Subsidiary,  including  without  limitation,  (i) all world wide  inventions and
discoveries  (whether  patentable or unpatentable  and whether or not reduced to
practice),  all improvements  thereto, and all patents,  patent applications and
patent    disclosures,    together   with   all   reissuances,    continuations,
continuations-in-part,  revisions,  extensions and reexaminations  thereof, (ii)
all trademarks,  service marks,  trade dress,  logos,  trade names and corporate
names, together with all translations, adaptations, derivations and combinations
thereof and including all goodwill associated  therewith,  and all applications,
registrations,  renewals and  derivatives  in  connection  therewith,  (iii) all
copyrightable  works,  all copyrights and all  applications,  registrations  and
renewals  in  connection  therewith,  (iv) all mask works and all  applications,
registrations  and renewals in connection  therewith,  (v) all  know-how,  trade
secrets  and   confidential   business   information,   whether   patentable  or
unpatentable and whether or not reduced to practice  (including ideas,  research
<PAGE>
and development, know-how, formulas, compositions,  manufacturing and production
processes and techniques,  technical data,  designs,  drawings,  specifications,
customer  and  supplier  lists,  addresses,  phone  numbers,  pricing  and  cost
information,  and business and marketing  plans and  proposals),  (vi) all other
proprietary  rights of any type of  description  (regardless of whether the same
have been  formally  registered),  (vii) all  copies  and  tangible  embodiments
thereof (in whatever  form or medium) and (viii) all licenses and  agreements in
connection with the foregoing.

                  2.12.  Title to  Assets  and  Properties;  Insurance.  (a) The
Company  has good and  marketable  title,  or a valid  leasehold  interest in or
contractual  right to use, all of its assets and  properties,  free and clear of
any mortgages,  judgments, claims, liens, security interests,  pledges, escrows,
charges   or   other   encumbrances   of  any  kind  or   character   whatsoever
("Encumbrances"),  except in each case for such  defects in title and such other
liens and Encumbrances which do not individually or in the aggregate  materially
detract  from the  value to the  Company  of the  properties  and  assets of the
Company and its Subsidiary taken as a whole.

                  (b) The Company and its Subsidiary  maintain insurance in such
amounts   (to  the   extent   available   in  the  public   market),   including
self-insurance,  retainage and deductible arrangements,  and of such a character
as is reasonable for companies engaged in the same or similar business.

                  2.13. Compliance with Laws; Permits. (a) Except as provided in
Schedule  2.13,  the  Company  and its  Subsidiary  are in  compliance,  and the
business of the Company and its  Subsidiary  have been  conducted in  compliance
with, all federal,  state,  local and foreign laws,  rules,  ordinances,  codes,
consents,  authorizations,   registrations,  regulations,  decrees,  directives,
judgments  and orders  applicable to them,  their  business and the ownership of
their  assets  including,  but not  limited to,  Environmental  Laws (as defined
below)  except  where the  failure to comply  would not  individually  or in the
aggregate have a Material  Adverse  Effect.  The Company and its Subsidiary have
all  federal,   state,  local  and  foreign  governmental   licenses,   permits,
qualifications  and authorizations  ("Permits")  necessary in the conduct of the
business as currently conducted.  All such Permits are in full force and effect,
and no  violations  have  been  recorded  in  respect  of any such  Permits;  no
proceeding  is pending or, to the best  knowledge of the Company,  threatened to
revoke or limit any such Permit; and no such Permit will be suspended,  canceled
or  adversely  modified  as a  result  of the  execution  and  delivery  of this
Agreement or the Ancillary  Documents and the  consummation of the  transactions
contemplated  hereby or  thereby,  except in any of the  foregoing  cases  where
failure to have such Permit would not  individually  or in the aggregate  have a
Material Adverse Effect.

                           (b) For  purposes of this  Agreement,  "Environmental
Laws" means,  without  limitation,  the  Comprehensive  Environmental  Response,
Compensation  and Liability Act, 42 U.S.C.  ss.ss.  9601, et seq.; the Emergency
Planning and Community  Right-to-Know  Act of 1986, 42 U.S.C.  ss.ss.  11001, et
seq.;  the Resource  Conservation  and Recovery Act, 42 U.S.C.  ss.ss.  6901, et
seq.;  the Toxic  Substances  Control Act, 15 U.S.C.  ss.ss.  2601, et seq.; the
Federal  Insecticide,  Fungicide,  and Rodenticide Act, 7 U.S.C.  ss.ss. 136, et
seq.;  the Clean Air Act, 42 U.S.C.  ss.ss.  7401, et seq.;  the Clean Water Act
(Federal Water Pollution Control Act), 33 U.S.C.  ss.ss. 1251, et seq.; the Safe
Drinking Water Act, 42 U.S.C.  ss.ss. 300f, et seq.; the Occupational Safety and
Health  Act,  29  U.S.C.   ss.ss.   641,  et  seq.;   the  Hazardous   Materials
<PAGE>
Transportation Act, 49 U.S.C. ss.ss. 1801, et seq.; as any of the above statutes
have  been or may be  amended  from  time to time,  all  rules  and  regulations
promulgated  pursuant  to any of the  above  statutes,  and any  other  foreign,
federal,  state or local law, statute,  ordinance,  rule or regulation governing
environmental  matters,  as the same  have been or may be  amended  from time to
time,  including  any common law cause of action  providing  any right or remedy
with  respect  to  environmental   matters,  and  all  applicable  judicial  and
administrative decisions, orders, and decrees relating to environmental matters.

                  2.14.  Offering  Exemption.   Assuming  the  accuracy  of  the
representations and warranties contained in Section 3 hereof, the offer and sale
of the Common  Stock and the  issuance  and  delivery of the Common Stock to the
Investors are each exempt from registration under the Securities Act of 1933, as
amended (the  "Securities  Act") and under applicable state securities and "blue
sky"  laws,  as  currently  in  effect  and are  otherwise  in  compliance  with
applicable federal and state securities laws.

                  2.15.  Taxes.  The  Company and its  Subsidiary  have filed or
caused to be filed all income tax  returns  which are  required  to be filed and
have paid or caused to be paid all Taxes (as  defined  below)  that have  become
due,  except  Taxes the  validity or amount of which is being  contested in good
faith by appropriate  proceedings  and with respect to which  adequate  reserves
have been set aside.  "Taxes," for purposes of this Agreement,  means any taxes,
assessments, duties, fees, levies, imposts, deductions, withholdings, including,
without limitation,  income,  gross receipts,  ad valorem,  value added, excise,
real or personal property,  asset,  sales, use, license,  payroll,  transaction,
capital,   net  worth  and  franchise  taxes,   estimated  taxes,   withholding,
employment,   social  security,   workers  compensation,   utility,   severance,
production,  unemployment compensation,  occupation,  premium, windfall profits,
transfer and gains taxes, or other governmental charges of any nature whatsoever
imposed by any  government  or taxing  authority  of any  country  or  political
subdivision of any country and any liabilities with respect  thereto,  including
any  penalties,  additions to tax, fines or interest  thereon,  and includes any
liability  of the  Company  and its  Subsidiary  arising  under any tax  sharing
agreement to which it is or has been a party.

                  3.  Representations  and  Warranties  of  the  Investor.  Each
Investor, severally and not jointly, hereby represents and warrants that:

                  3.1  Authorization.  This Agreement  constitutes its valid and
legally binding obligation, enforceable in accordance with its terms.

                  3.2 Purchase Entirely for Own Account.  This Agreement is made
with each  Investor  in  reliance  upon each  Investor's  representation  to the
Company,  which by such  Investor's  execution of this  Agreement  such Investor
hereby  confirms,  that the Common Stock to be received by such Investor will be
acquired for  investment for such  Investor's  own account,  not as a nominee or
agent,  for  investment  purposes  only,  and not with a view to the  resale  or
distribution  of any part thereof within the meaning of the Securities  Act, and
that  such  Investor  has  no  present   intention  of  selling,   granting  any
participation  in,  or  otherwise  distributing  the  same.  By  executing  this
Agreement,  each Investor further represents that it does not have any contract,
undertaking, agreement or arrangement with any person to sell, transfer or grant
participation to such person or to any third person,  with respect to the Common
Stock. Each Investor represents that it will not, directly or indirectly, offer,
sell,  pledge,  transfer or otherwise  dispose of (or solicit any offers to buy,
<PAGE>
purchase or  otherwise  acquire or take a pledge of) any of the shares of Common
Stock except in  compliance  with the  Securities  Act of 1933,  as amended (the
"Act"),  and the rules and  regulations  promulgated  thereunder  and applicable
state  securities  laws.  Each  Investor  represents  that it has full power and
authority to enter into this Agreement.

                  3.3 Disclosure of Information.  Each Investor  believes it has
received all the information it considers  necessary or appropriate for deciding
whether to purchase the Common Stock.  Each Investor further  represents that it
has had an  opportunity  to ask questions  and receive  answers from the Company
regarding  the terms and  conditions  of the offering of the Common  Stock.  The
foregoing,  however, does not limit or modify the representations and warranties
of the Company in Section 2 of this  Agreement or the right of each  Investor to
rely thereon.

                  3.4  Investment  Experience.  Each  Investor is an investor in
securities of companies in the  development  stage and  acknowledges  that it is
able to fend for itself,  can bear the economic risk of its  investment  and has
such knowledge and  experience in financial or business  matters such that it is
capable  of  evaluating  the merits  and risks of its  investment  in the Common
Stock.

                  3.5  Accredited  Investor.  Each  Investor  is an  "accredited
investor"  within the meaning of SEC Rule 501 of  Regulation  D, as presently in
effect.  Each Investor has  completed or caused to be completed the  Certificate
for Investors  attached  hereto as Exhibit B-1 or B-2, as  appropriate,  and the
responses provided therein shall be true as of the Closing.

                  3.6 Restricted Securities.  Each Investor understands that the
shares  of  Common  Stock it is  purchasing  are  characterized  as  "restricted
securities" ("Restricted Securities") under the federal securities laws inasmuch
as they are being  acquired  from the Company in a  transaction  not involving a
public  offering  and that  under  such  laws and  applicable  regulations  such
securities  may not be resold  without  registration  under  the Act,  except in
certain limited circumstances. In this connection, each Investor represents that
it is familiar with SEC Rule 144, as presently in effect,  and  understands  the
resale limitations imposed thereby and by the Act.

                  4.  Certain Covenants

                  4.1 Use of Proceeds.  The net proceeds received by the Company
from the sale of the Common Stock as contemplated by this Agreement will be used
by the Company for general working capital purposes.

                  4.2 Rule 144 Reporting. With a view to making available to the
Investors  the benefits of certain  rules and  regulations  of the SEC which may
permit the sale of the  Common  Stock to the public  without  registration,  the
Company agrees to use its best efforts to:

                           (a) make and keep public  information  available,  as
         those terms are understood and defined in rule 144 under the Securities
         Act, at all times;

                           (b) use its best  efforts  to file  with the SEC in a
         timely manner all reports and other  documents  required of the Company
         under the Securities Act and the Exchange Act; and
<PAGE>
                           (c) so  long  as the  Investor  owns  any  Restricted
         Securities (as defined in Section 3.6 hereof),  furnish to the Investor
         forthwith  upon  request a written  statement  by the Company as to its
         compliance  with the  reporting  requirements  of Rule 144,  and of the
         Securities  Act and the Exchange  Act, a copy of the most recent annual
         or  quarterly  report of the  Company  filed  with the  Securities  and
         Exchange  Commission,  and such  other  reports  and  documents  of the
         Company  and  other  information  in the  possession  of or  reasonably
         obtainable  by the Company as the  Investor may  reasonably  request in
         availing  itself  of any  rule or  regulation  of the SEC  allowing  an
         Investor to sell any such securities without registration.

                  5. Transfer  Taxes.  The Company  agrees that it will pay, and
will hold each Investor harmless from, any and all liability with respect to any
stamp or similar Taxes which may be determined to be payable in connection  with
the execution and delivery and performance of this  Agreement,  and that it will
similarly pay and hold each  Investor  harmless from all Taxes in respect of the
issuance of the Common Stock to such Investor.

                  6.  Expenses.  (a)  Except as set forth in Section  6(b),  the
Company and each Investor shall pay all the costs and expenses incurred by it or
on its behalf in  connection  with this  Agreement and the  consummation  of the
transactions contemplated hereby.

                           (b)  Within  10 days  from the  receipt  of a billing
         statement  from one of the Pequot  entities  listed on  Schedule 1 (the
         "Pequot  Entities"),  the  Company  shall pay and shall  reimburse  the
         Pequot  Entities for all of their  reasonable  legal costs and expenses
         incurred in connection with this transaction (including the negotiation
         and  preparation of this Agreement and the Ancillary  Documents and the
         consummation  of the  transactions  contemplated  hereby and  thereby);
         provided, however, in no event shall the liability of the Company under
         this Section 6(b) in the aggregate exceed $25,000.

                  7.   Indemnification.

                  7.1  General  Indemnification.  The Company  shall  indemnify,
defend  and hold each  Investor,  its  affiliates,  their  respective  officers,
directors, partners, employees, agents, representatives,  successors and assigns
(each an  "Investor  Entity")  harmless  from and against all Losses (as defined
below) incurred or suffered by an Investor Entity (whether  incurred or suffered
directly  or  indirectly  through  ownership  of capital  stock of the  Company)
arising from the breach of any of the representations,  warranties, covenants or
agreements  made by the Company in this Agreement or in any Ancillary  Document.
Each Investor,  severally and not jointly, shall indemnify,  defend and hold the
Company,  its  affiliates,  their  respective  officers,  directors,  employees,
agents,  representatives,  successors  and assigns  harmless  against all Losses
arising from the breach of any of its representations,  warranties, covenants or
agreements  in this  Agreement or in any  Ancillary  Documents.  Notwithstanding
anything to the contrary in this Agreement,  no  indemnification  payment by the
Company pursuant to this Section 7 with respect to any Losses otherwise  payable
hereunder as a result of a breach of the  representations  and warranties of the
Company (other than any Losses resulting from breaches of the representation and
warranty in Section 2.3 which shall not be subject to the Deductible (as defined
below)) shall be payable  until the time as such Losses shall  aggregate for all
Investor Entities to more than $75,000 (the "Deductible"),  and then only to the
extent that such Losses, in the aggregate for all Investor Entities,  exceed the
Deductible.
<PAGE>
                  7.2 Indemnification  Principles.  For purposes of this Section
7, (i) "Losses" shall mean each and all of the following items: claims,  losses,
(including,  without limitation,  losses of earnings) liabilities,  obligations,
payments,  damages,  charges,  judgments,  fines,  penalties,  amounts  paid  in
settlement,  costs and expenses (including,  without limitation,  interest which
may be imposed in connection therewith, costs and expenses of investigation,
actions,  suits,  proceedings,  demands,  assessments  and  fees,  expenses  and
disbursements of counsel,  consultants and other experts);  and (ii) each of the
representations  and  warranties  made by any party in this Agreement and in the
Ancillary  Documents  shall be deemed to have been made without the inclusion of
limitations or  qualifications  as to  materiality,  such as the words "Material
Adverse  Effect,"  "immaterial,"  "material"  and "in all material  respects" or
words of similar  import.  Any payment (or deemed  payment) by the Company to an
Investor  pursuant to this  Section 7, shall be treated  for federal  income tax
purposes  as an  adjustment  to the price paid by such  Investor  for the Common
Stock pursuant to this Agreement.

                  7.3 Claim Notice. A party seeking  indemnification  under this
Section 7 shall,  promptly upon becoming  aware of the facts  indicating  that a
claim  for  indemnification  may be  warranted,  give  to the  party  from  whom
indemnification  is being sought a claim notice  relating to such Loss (a "Claim
Notice").  Each  Claim  Notice  shall  specify  the  nature  of the  claim,  the
applicable  provision(s) of this Agreement or other  instrument  under which the
claim for indemnity arises, and, if possible, the amount or the estimated amount
thereof.  No failure  or delay in giving a Claim  Notice (so long as the same is
given prior to expiration of the representation or warranty upon which the claim
is based) and no failure to include  any  specific  information  relating to the
claim (such as the amount or estimated  amount  thereof) or any reference to any
provision  of this  Agreement or other  instrument  under which the claim arises
shall affect the obligation of the party from whom indemnity is sought.

                  8. Remedies.  In case any one or more of the covenants  and/or
agreements  set forth in this  Agreement  shall have been  breached by any party
hereto, each Investor, with respect to a breach by the Company, and the Company,
with respect to a breach by an Investor,  may proceed to protect and enforce its
rights  either by suit in equity  and/or  by action at law,  including,  but not
limited  to, an action  for  damages  as a result of any such  breach  and/or an
action for specific  performance of any such covenant or agreement  contained in
this Agreement.

                  9. Miscellaneous. 


                  9.1 Survival of Warranties.  The  warranties,  representations
and covenants of the Company and each Investor  contained in or made pursuant to
this  Agreement  shall survive the execution and delivery of this  Agreement and
the Closing and shall in no way be affected by any  investigation of the subject
matter thereof made by or on behalf of the Investors or the Company.

                  9.2  Successors  and  Assigns.  Except as  otherwise  provided
herein, the terms and conditions of this Agreement shall inure to the benefit of
and be binding upon the  respective  successors,  permitted  assigns,  heirs and
personal  representatives of the parties (including transferees of any shares of
Common Stock sold hereunder),  except that the Company may not assign its rights
and  obligations  under this  Agreement to any person  without the prior written
consent of the  Investors  purchasing  two-thirds of the Common Stock to be sold
pursuant to this Agreement, except in connection with a merger, consolidation or
<PAGE>
sale of all or substantially  all of the assets of the Company.  Nothing in this
Agreement,  express or implied,  is intended to confer upon any party other than
the  parties  hereto or their  respective  successors  and  assigns  any rights,
remedies,  obligations,  or  liabilities  under or by reason of this  Agreement,
except as expressly provided in this Agreement.

                  9.3  Governing  Law. This  Agreement  shall be governed by and
construed  under  the  laws of the  State  of New  York  without  regard  to the
principles  of conflicts  or choice of law.  Each of the parties  hereto  hereby
irrevocably and unconditionally consents to submit to the exclusive jurisdiction
of the courts of the State of New York and of the United States of America,  for
any  Litigation  arising out of or relating to this  Agreement and the Ancillary
Documents  and the  transactions  contemplated  hereby and thereby,  and further
agrees  that  service  of any  process,  summons,  notice  or  document  by U.S.
registered  mail to its respective  address set forth in this Agreement shall be
effective  service of process for any Litigation  brought against it in any such
court.

                  9.4  Counterparts.  This  Agreement  may be executed in two or
more counterparts,  each of which shall be deemed an original,  but all of which
together shall constitute one and the same instrument.

                  9.5 Titles and  Subtitles.  The titles and  subtitles  used in
this  Agreement  are used for  convenience  only and are not to be considered in
construing or interpreting this Agreement.

                  9.6 Notices. Unless otherwise provided, any notice required or
permitted  under this  Agreement  shall be given in writing  and shall be deemed
effectively  given upon  personal  delivery  to the party to be notified or upon
deposit with the United States Post Office,  by  registered  or certified  mail,
postage  prepaid  and  addressed  to the  party to be  notified  at the  address
indicated for such party on the signature page hereof in the case of the Company
and on Schedule 1 in the case of each Investor, or at such other address as such
party  may  designate  by ten (10)  days'  advance  written  notice to the other
parties.

                  9.7 Finder's Fee. Each party represents that it neither is nor
will be obligated for any finders' fee or  commission  in  connection  with this
transaction.  Each Investor agrees to indemnify and to hold harmless the Company
from any  liability  for any  commission  or  compensation  in the  nature  of a
finders' fee (and the costs and expenses of defending  against such liability or
asserted  liability)  for which such Investor or any of its officers,  partners,
employees, or representatives is responsible.

                  The  Company   agrees  to  indemnify  and  hold  harmless  the
Investors from any liability for any commission or compensation in the nature of
a finders' fee (and the costs and expenses of defending  against such  liability
or asserted  liability) for which the Company or any of its officers,  employees
or representatives is responsible.

                  9.8  Attorneys'  Fees.  If any  action  at law or in equity is
necessary to enforce or interpret the terms of this  Agreement,  the  prevailing
party shall be entitled  to  reasonable  attorneys'  fees,  costs and  necessary
disbursements  in  addition  to any  other  relief  to which  such  party may be
entitled.
<PAGE>
                  9.9 Amendments  and Waivers.  No term of this Agreement may be
amended,  discharged  or  terminated  and  the  observance  of any  term of this
Agreement may not be waived  (either  generally or in a particular  instance and
either retroactively or prospectively), without the prior written consent of the
Investors purchasing  two-thirds of the Common Stock to be sold pursuant to this
Agreement.  Any amendment or waiver  effected in accordance  with this paragraph
shall be  binding  upon  each  holder of any  securities  purchased  under  this
Agreement at the time  outstanding,  each future holder of all such  securities,
and the Company.  No waiver of any of the provisions of this Agreement  shall be
deemed to or shall constitute a waiver of any other provision hereof (whether or
not similar).  No delay on the part of any party in exercising any right,  power
or privilege hereunder shall operate as a waiver thereof.

                  9.10 Severability. If one or more provisions of this Agreement
are held to be  unenforceable  under  applicable  law, such  provision  shall be
excluded  from  this  Agreement  and  the  balance  of the  Agreement  shall  be
interpreted  as if such  provision  were so excluded and shall be enforceable in
accordance with its terms.

                  9.11  Entire  Agreement.  This  Agreement  and  the  documents
referred  to herein  constitute  the entire  agreement  among the parties and no
party  shall be  liable  or  bound  to any  other  party  in any  manner  by any
warranties,  representations,  or  covenants  except as  specifically  set forth
herein or therein.

                  9.12 Press  Releases  and  Announcements.  Each of the parties
hereto agrees that it will not issue any press release or announcement  relating
to the subject  matter of this Agreement  without the prior written  approval of
the  other  parties;  provided,  however,  that any  party  may make any  public
disclosure it believes in good faith is required by law or regulation  (in which
case the disclosing  party shall advise the other  parties,  provide them with a
copy  of the  proposed  disclosure  prior  to  making  the  disclosure,  and use
reasonable efforts to agree upon the text of such press release,  before issuing
any such press release).

                [Remainder of this page intentionally left blank]

                                                        

<PAGE>



                  IN WITNESS  WHEREOF,  the parties  have  executed  this Common
Stock Purchase Agreement as of the date first above written.


                                  EXOGEN, INC.



                                  By:    /s/ Patrick A. McBrayer
                                         -----------------------
                                  Name:  Patrick A. McBrayer
                                  Title: President and Chief Executive Officer

                                  Address:      10 Constitution Avenue
                                                P.O. Box 6860
                                                Piscataway, NJ 08855




                                  INVESTORS:

                                  DELPHI VENTURES III, L.P.

                                  By:    Delphi Management Partners III, L.L.C.,
                                         General Partner


                                  By:    /s/ Donald J. Lothrop
                                         ---------------------
                                  Name:  Donald J. Lothrop
                                  Title: Managing Member


                                  DELPHI BIO-INVESTMENTS III, L.P.

                                  By:    Delphi Management Partners III, L.L.C.,
                                         General Partners


                                  By:    /s/ Donald J. Lothrop
                                         ---------------------
                                  Name:  Donald J. Lothrop
                                  Title: Managing Member




                         COMMON STOCK PURCHASE AGREEMENT


<PAGE>

                                  THE DEMETER TRUST DTD 6/5/90
                                  TRUSTEE


                                  By:    /s/ Richard Johnston
                                         --------------------
                                  Name:  Richard Johnston



                                  ALEXANDRA F. JOHNSTON TRUST DTD
                                  11/6/78
                                  Trustee

                                  By:    /s/ Richard Johnston
                                         --------------------
                                  Name:  Richard Johnston



                                  BRADFORD D. JOHNSTON TRUST DTD
                                  11/6/78
                                  Trustee

                                  By:    /s/ Richard Johnston
                                         --------------------
                                  Name:  Richard Johnston



                                  WILLIAM M. JOHNSTON TRUST DTD
                                  11/6/7
                                  Trustee

                                  By:    /s/ Richard Johnston
                                         --------------------
                                  Name:  Richard Johnston



                                  ROBERT F. JOHNSTON


                                  By:    /s/ Robert F. Johnston
                                         ----------------------
                                         Robert F. Johnston









                         COMMON STOCK PURCHASE AGREEMENT

<PAGE>




                                  PEQUOT PRIVATE EQUITY FUND L.P.


                                  By:    /s/ Amiel Peretz
                                         -----------------
                                  Name:  Amiel Peretz
                                  Title: CFO, DSCMI Inv. Mgr.


                                  PEQUOT OFFSHORE PRIVATE EQUITY
                                  FUND, INC.


                                  By:    /s/ Amiel Peretz
                                         ----------------
                                  Name:  Amiel Peretz
                                  Title: CFO, DSCMI Inv. Mgr.































                         COMMON STOCK PURCHASE AGREEMENT


<PAGE>




                            PIPER JAFFRAY HEALTHCARE CAPITAL
                            LIMITED PARTNERSHIP (SBIC)

                            By:    Piper Ventures Management IV Limited
                                   Partnership, its General Partner

                            By:    /s/ Buzz Benson
                                   ---------------
                                   Buzz Benson, Managing Director Piper
                                   Ventures Capital, Inc., Its General Partner

































                         COMMON STOCK PURCHASE AGREEMENT


<PAGE>



                                  TERENCE D. WALL


                                  By:    /s/ Terence D. Wall
                                         -------------------
                                         Terence D. Wall









































                         COMMON STOCK PURCHASE AGREEMENT



 

                                                                   EXHIBIT 10.19
















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



                          REGISTRATION RIGHTS AGREEMENT

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


                                October 20, 1997



<PAGE>



                                TABLE OF CONTENTS

                                                                                

         1.       Registration Rights...........................................
                  1.1      Definitions..........................................
                  1.2      Shelf Registration...................................
                  1.3      Company Registration.................................
                  1.4      Obligations of the Company...........................
                  1.5      Furnish Information..................................
                  1.6      Expenses of Registration.............................
                  1.7      Expenses of Company Registration.....................
                  1.8      Underwriting Requirements............................
                  1.9      Delay of Registration................................
                  1.10     Indemnification......................................
                  1.11     Reports Under Securities Exchange Act of 1934........
                  1.12     Assignment of Registration Rights....................
                  1.13     Limitations on Subsequent Registration Rights........
                  1.14     "Market Stand-Off" Agreement.........................
                  1.15     No Required Sale.....................................

         2.       Miscellaneous.................................................
                  2.1      Successors and Assigns...............................
                  2.2      Governing Law........................................
                  2.3      Counterparts.........................................
                  2.4      Titles and Subtitles.................................
                  2.5      Notices..............................................
                  2.6      Expenses.............................................
                  2.7      Amendments and Waivers...............................
                  2.8      Severability.........................................
                  2.9      Nominees for Beneficial Owners.......................
                  2.10     Specific Performance.................................
                  2.11     No Inconsistent Agreements...........................
                  2.12     Entire Agreement.....................................




<PAGE>
                          REGISTRATION RIGHTS AGREEMENT


                  THIS REGISTRATION  RIGHTS AGREEMENT is made as of the 20th day
of October,  1997 by and  between  Exogen,  Inc.,  a Delaware  corporation  (the
"Company"),  and the investors  listed on Schedule 1 hereto  (collectively,  the
"Investors").

                                    RECITALS

                  WHEREAS,  the  Company  and the  Investors  are parties to the
Common Stock  Purchase  Agreement  of even date  herewith  (the "Stock  Purchase
Agreement");

                  WHEREAS,  in order to induce  the  Company  to enter  into the
Stock  Purchase  Agreement  and to induce the  Investors  to invest funds in the
Company pursuant to the Stock Purchase Agreement,  the Investors and the Company
hereby agree that this  Agreement  shall  govern the rights of the  Investors to
cause the Company to register  shares of Common Stock  issuable to the Investors
and certain other matters as set forth herein;

                  NOW, THEREFORE, THE PARTIES HEREBY AGREE AS FOLLOWS:

                  1.       Registration Rights. The Company covenants and agrees
                           as follows:

                           1.1      Definitions. For purposes of this Section 1:

                                    (a) The term "Act" means the  Securities Act
of 1933, as amended.

                                    (b) The terms  "Form  S-3"  means  such form
under the Act as in effect on the date hereof or any registration form under the
Act subsequently  adopted by the SEC which permits inclusion or incorporation of
substantial  information  by reference to other  documents  filed by the Company
with the SEC.

                                    (c) The term "register,"  "registered,"  and
"registration"  refer to a  registration  effected  by  preparing  and  filing a
registration statement or similar document in compliance with the Securities Act
of  1933,  as  amended  (the  "Act"),   and  the   declaration  or  ordering  of
effectiveness of such registration statement or document;

                                    (d) The term "Registrable  Securities" means
(1) the Common Stock issued pursuant to the Stock Purchase Agreement and (2) any
Common  Stock of the  Company  issued as (or  issuable  upon the  conversion  or
exercise of any warrant,  right or other security which is issued as) a dividend
or other  distribution with respect to, or in exchange for or in replacement of,
such Common Stock,  excluding in all cases, however, any Registrable  Securities
which are sold, assigned,  pledged,  hypothecated or otherwise disposed of by an
Investor in a transaction in which such  Investor's  rights under this Agreement
are not assigned or assignable;

                                    (e) The  number of  shares  of  "Registrable
Securities  then  outstanding"  shall be  determined  by the number of shares of
Common  Stock  outstanding  which are,  and the number of shares of Common Stock
issuable  pursuant to then  exercisable  or  convertible  securities  which are,
Registrable Securities; and
<PAGE>
                                    (f)  The  term  "Holder"  means  one  of the
Investors.

                           1.2      Shelf Registration.

                                    (a)  The  Company  shall,   subject  to  the
limitations  specified  in this  Agreement,  use its best  efforts (i) to file a
shelf  registration  statement  on Form S-3 or any other form  available  to the
Company  within  ninety  (90)  days from the date  hereof  (the  "Filing  Date")
covering  the  registration  under the Act of all  Registrable  Securities  then
outstanding  to be offered or sold on a delayed or continuous  basis as provided
by this  Agreement,  pursuant  to Rule 415 of the Act (the  "Shelf  Registration
Statement");  and (ii) to maintain the  effectiveness of the Shelf  Registration
Statement  for a period of two (2) years from the date this  Agreement  (or such
shorter period in accordance with Section 1.3).

                                    (b)  If any  offering  pursuant  to  Section
1.2(a) hereof involves an underwritten offering, an underwriter will be selected
by the Holders of two-thirds of the Registrable  Securities then outstanding and
shall be reasonably  acceptable to the Company.  In such event, the right of any
Holder to include  its  Registrable  Securities  in such  registration  shall be
conditioned  upon  such  Holder's  participation  in such  underwriting  and the
inclusion of such Holder's  Registrable  Securities in the  underwriting  to the
extent  provided  herein.  All  Holders  proposing  to  distribute   Registrable
Securities  through  such  underwriting  shall  (together  with the  Company  as
provided in Section  1.4(e)) enter into an  underwriting  agreement in customary
form  with the  underwriter  or  underwriters  selected  for such  underwriting.
Notwithstanding  any other  provision of this  Section  1.2, if the  underwriter
advises the Holders in writing that  marketing  factors  require a limitation of
the  number  of  shares  to be  underwritten,  then  the  number  of  shares  of
Registrable  Securities  that  may be  included  in the  underwriting  shall  be
allocated  among all Holders thereof in proportion (as nearly as practicable) to
the  amount of  Registrable  Securities  of the  Company  owned by each  Holder;
provided,  however,  that the number of shares of  Registrable  Securities to be
included in such  underwriting  shall not be reduced unless all Other Securities
(as defined below) are first entirely excluded from the underwriting.

                                    (c)  Notwithstanding  the foregoing,  if the
Company shall furnish to the Holders a certificate signed by the Chief Executive
Officer or President of the Company  stating that, in the good faith judgment of
the Board of  Directors of the Company,  it would be  seriously  detrimental  (a
"Detrimental  Condition") to the Company and its stockholders for a registration
statement to be filed or to become or remain effective,  as the case may be, and
provided that the  Detrimental  Condition has not resulted from actions taken by
the Company,  (i) the Company  shall have the right to defer taking  action with
respect to the filing of the Shelf  Registration  Statement  for a period of not
more  than  ninety  (90)  days  after  the  Filing  Date,  (ii)  in case a Shelf
Registration Statement has been filed but has not become effective,  the Company
may cause such  registration  statement to be withdrawn or may postpone amending
or supplementing such registration statement until such Detrimental Condition no
longer exists,  but in no event for more than ninety (90) days, or (iii) in case
a Shelf  Registration  Statement  has been filed and has become  effective,  the
Company  may  cause  such  registration   statement  to  be  withdrawn  and  its
effectiveness   terminated  or  may  postpone  amending  or  supplementing  such
registration statement until such Detrimental Condition no longer exists, but in
no event  for more  than  ninety  (90)  days.  The  Company  may not  declare  a
<PAGE>
Detrimental Condition, or take any of the actions specified in clauses (i), (ii)
or (iii) of the preceding  sentence (and can take only one such action specified
in clauses (i), (ii) or (iii) per Detrimental Condition),  more than once in any
twelve-month  period. The Company shall give written notice of its determination
to  postpone  or  withdraw  a  registration  statement  and of the fact that the
Detrimental  Condition for such  postponement or withdrawal no longer exists, in
each case,  promptly  after the  occurrence  thereof.  The  following  events or
circumstances  may  result  in the  filing  of a  registration  statement  being
seriously  detrimental to the Company and its  shareholders:  a pending material
acquisition,  merger  or sale or  purchase  of  assets,  pending  or  threatened
material  litigation,  pending or threatened material regulatory or governmental
action, pending material change in the business, prospects, condition (financial
or other) or properties of the Company.  The foregoing list is for  illustrative
purposes only and is not meant to be exclusive.

                                    (d) If the Company  shall give any notice of
postponement or withdrawal of any registration statement, the Company shall not,
during the period of postponement or withdrawal pursuant to clauses (i), (ii) or
(iii) of the prior paragraph,  register any Common Stock, other than pursuant to
a registration statement on Form S-4 or S-8 (or an equivalent  registration form
then in effect). Each Holder of Registrable Securities agrees that, upon receipt
of any notice from the Company that the Company has  determined  to withdraw any
registration  statement pursuant to the immediately  preceding  paragraph,  such
Holder will  discontinue its disposition of Registrable  Securities  pursuant to
such registration  statement and, if so directed by the Company, will deliver to
the Company (at the Company's  expense) all copies,  other than  permanent  file
copies,  then  in such  Holder's  possession  of the  prospectus  covering  such
Registrable Securities that was in effect at the time of receipt of such notice.
If the Company shall have  withdrawn or  prematurely  terminated a  registration
statement  filed under this  Section 1.2  (whether  pursuant to the  immediately
preceding paragraph, or as a result of any stop order, injunction or other order
or  requirement  of the SEC or any  other  governmental  agency or  court),  the
Company shall not be considered to have effected an effective  registration  for
the  purposes  of this  Agreement  until  the  Company  shall  have  filed a new
registration  statement  covering  the  Registrable  Securities  covered  by the
withdrawn registration statement and such registration statement shall have been
declared effective and shall not have been withdrawn.  If the Company shall give
any notice of  withdrawal  or  postponement  of a  registration  statement,  the
Company  shall,  at such time as the  Detrimental  Condition  that  caused  such
withdrawal or  postponement  no longer exists (but in no event later than ninety
(90)  days  after  the date of the  postponement  or  withdrawal),  use its best
efforts to effect the  registration  under the Securities Act of the Registrable
Securities  covered by the  withdrawn  or  postponed  registration  statement in
accordance  with this Section 1.2 (unless the Holder shall have  withdrawn  such
request,  in which case the Company  shall not be considered to have effected an
effective registration for the purposes of this Agreement).

                                    (e) Without the prior written consent of the
Holders of  two-thirds  of the  Registrable  Securities  then  outstanding,  the
registration  statement filed pursuant to this Section 1.2 may not include other
securities  of the  Company  (i) which  are held by  persons  who,  by virtue of
agreements  with the Company,  are entitled to include  their  securities in any
such registration, (ii) which are held by officers and directors of the Company,
or (iii) which are being  offered for the account of the Company  (collectively,
the securities  referred to in clauses (i), (ii) and (iii) in this paragraph are
hereinafter referred to as the "Other Securities").
<PAGE>
                           1.3  Company   Registration.   If  (but  without  any
obligation  to do so) the  Company  proposes  to  register  (including  for this
purpose a registration  effected by the Company for stockholders  other than the
Holders) any of its stock or other  securities  under the Act in connection with
the  public  offering  of  such  securities   solely  for  cash  (other  than  a
registration  relating  solely to the sale of  securities to  participants  in a
Company  stock  option,  stock  purchase  or  similar  plan  or a SEC  Rule  145
transaction, a registration on any form which does not include substantially the
same information as would be required to be included in a registration statement
covering the sale of the  Registrable  Securities or a registration in which the
only Common Stock being  registered is Common Stock issuable upon  conversion of
debt  securities  that are also being  registered),  the Company shall,  at such
time,  promptly give each Holder written notice of such  registration.  Upon the
written  request of each Holder given within  twenty (20) days after  mailing of
such notice by the Company in  accordance  with Section 2.5, the Company  shall,
subject to the provisions of Section 1.8,  cause to be registered  under the Act
all of the  Registrable  Securities  that each such Holder has  requested  to be
registered.  No registration effected pursuant to this Section 1.3 shall relieve
the Company of its obligations to effect the required  registration  pursuant to
Section  1.2.  Any  Holder  shall have the right to  withdraw  his  request  for
inclusion of its Registrable  Securities in any registration  statement pursuant
to this  Section 1.3 by giving  written  notice to the Company of its request to
withdraw.

                           1.4  Obligations of the Company.  When required under
this Section 1 to effect the  registration  of the Registrable  Securities,  the
Company shall, as expeditiously as reasonably possible:

                                    (a) Prepare and file with the Securities and
Exchange   Commission  (the  "SEC")  a  Shelf  Registration   Statement  or,  if
applicable,  any other form of registration  statement, as the case may be, with
respect to the  Registrable  Securities  and use its best  efforts to cause such
registration  statement to become effective within one hundred twenty (120) days
after such registration  statement was filed and to keep such Shelf Registration
Statement effective for a period up to the second anniversary of the date hereof
or until the distribution  contemplated in the Shelf Registration  Statement has
been completed;  provided,  however, that before filing a registration statement
or prospectus or any amendments or supplements thereto, or comparable statements
under securities or blue sky laws of any jurisdiction,  the Company will furnish
to one counsel for the Holders (the  "Holders'  Counsel")  participating  in the
planned  offering  (selected  by the Holders of  two-thirds  of the  Registrable
Securities   then   outstanding   included  in  such   registration),   and  the
underwriters,  if  any,  copies  of all  such  documents  proposed  to be  filed
(including  all  exhibits  thereto),  which  documents  will be  subject  to the
reasonable review and reasonable comment of such counsel.

                                    (b)  Prepare  and  file  with  the SEC  such
amendments  and  supplements to such  registration  statement and the prospectus
used in  connection  with such  registration  statement  as may be  necessary to
comply with the  provisions  of the Act with respect to the  disposition  of all
securities covered by such registration statement.

                                    (c) Furnish to the Holders whose Registrable
Securities  are  covered by the Shelf  Registration  Statement  such  numbers of
copies of a prospectus,  including a preliminary prospectus,  in conformity with
the  requirements  of the Act, and such other  documents as they may  reasonably
request in order to facilitate the disposition of Registrable  Securities  owned
by them.
<PAGE>
                                    (d) Use its best  efforts  to  register  and
qualify the securities  covered by such registration  statement under such other
securities  or Blue  Sky  laws of such  jurisdictions  as  shall  be  reasonably
requested by the Holders whose  Registrable  Securities are covered by the Shelf
Registration  Statement;  provided  that the  Company  shall not be  required in
connection  therewith or as a condition  thereto to qualify to do business or to
file a general consent to service of process in any such states or jurisdictions
unless the Company is already subject to service in such jurisdiction.

                                    (e) In the event the Registrable  Securities
are to be sold through an underwritten  public offering,  enter into and perform
its obligations  under an underwriting  agreement,  in usual and customary form,
with the  managing  underwriter  of such  offering.  The  Holders  proposing  to
distribute  Registrable  Securities  through such  underwritten  public offering
shall also enter into and perform their obligations under such an agreement.

                                    (f) In the event the Registrable  Securities
are to be sold through an underwritten public offering,  use its best efforts to
furnish,  on the date that such  Registrable  Securities  are  delivered  to the
underwriters for sale in connection with a registration pursuant to this Section
1, (i) an opinion,  dated such date, of the counsel representing the Company for
the purposes of such registration, in form and substance as is customarily given
to  underwriters  in  an  underwritten   public   offering,   addressed  to  the
underwriters, and (ii) a letter, dated such date, from the independent certified
public  accountants of the Company addressed to the  underwriters,  stating that
such accountants are independent  public  accountants  within the meaning of the
Act and the applicable published rules and regulations thereunder, and otherwise
in form and in substance as is customarily given by independent certified public
accountants to underwriters in connection with an underwritten public offering.

                                    (g) Promptly  notify (i) each Holder selling
Registrable  Securities covered by such registration statement and each managing
underwriter,  if any: (A) when the registration statement, the prospectus or any
prospectus  supplement  related  thereto  or  post-effective  amendment  to  the
registration  statement  has been filed and,  with  respect to the  registration
statement or any post-effective  amendment,  when the same has become effective,
(B) of the issuance by the SEC of any stop order suspending the effectiveness of
the  registration  statement  or the  initiation  of any  proceedings  for  that
purpose,  (C) of the receipt by the Company of any notification  with respect to
the suspension of the qualification of any Registrable Securities for sale under
the  securities or blue sky laws of any  jurisdiction  or the  initiation of any
proceeding  for  such  purpose,  and  (D)  when  a  prospectus  relating  to the
registration  statement  is  required  to be  delivered  under  the  Act  of the
happening  of any  event as a result of which the  prospectus  included  in such
registration  statement,  as then in effect,  includes an untrue  statement of a
material fact or omits to state a material fact required to be stated therein or
necessary  to make the  statements  therein not  misleading  in the light of the
circumstances  then  existing;  and (ii)  Holders'  Counsel  and  each  managing
underwriter  of any request by the SEC for  amendments  or  supplements  to such
registration   statement  or  prospectus   related  thereto  or  for  additional
information. If the notification relates to an event described in clause (i)(D),
the Company  shall,  in  accordance  with  paragraph  (b) of this  Section  1.4,
promptly  prepare  and  furnish to each Holder  selling  Registrable  Securities
covered by such registration statement and each managing underwriter,  if any, a
reasonable number of copies of a prospectus  supplemented or amended so that, as
<PAGE>
thereafter  delivered to the  purchasers of such  Registrable  Securities,  such
prospectus  shall not include an untrue  statement of a material fact or omit to
state a material  fact  required to be stated  therein or  necessary to make the
statements therein in the light of the circumstances  under which they were made
not misleading.

                                    (h)  Cooperate  with the selling  Holders of
Registrable  Securities and the managing underwriter,  if any, to facilitate the
timely  preparation  and delivery of  certificates  not bearing any  restrictive
legends  representing  the  Registrable  Securities  to be sold,  and cause such
Registrable Securities to be issued in such denominations and registered in such
names  in  accordance  with  the  underwriting  agreement  prior  to any sale of
Registrable  Securities to the underwriters or, if not an underwritten offering,
in  accordance  with the  instructions  of the  selling  Holders of  Registrable
Securities  at least  three  business  days  prior  to any  sale of  Registrable
Securities  and  instruct  any  transfer  agent  and  registrar  of  Registrable
Securities to release any stop transfer orders in respect thereto.

                                    (i)  Comply  with all  applicable  rules and
regulations of the SEC, and make generally available to its security holders, as
soon as  reasonably  practicable  after the effective  date of the  registration
statement (and in any event within 16 months thereafter),  an earnings statement
(which need not be audited)  covering the period of at least twelve  consecutive
months  beginning  with the first day of the Company's  first  calendar  quarter
after the effective date of the registration statement, which earnings statement
shall satisfy the provisions of Section 11(a) of the Securities Act and Rule 158
thereunder.

                                    (j)   (i)   Cause   all   such   Registrable
Securities covered by such registration  statement to be listed on the principal
securities  exchange on which similar  securities issued by the Company are then
listed (if any), if the listing of such Registrable Securities is then permitted
under the rules of such exchange,  or (ii) if no similar  securities are then so
listed,  to  either  cause  all such  Registrable  Securities  to be listed on a
national  securities  exchange or to secure  designation of all such Registrable
Securities as a National  Association  of  Securities  Dealers,  Inc.  Automated
Quotation System ("NASDAQ") "national market system security" within the meaning
of  Rule  11Aa2-1  of  the  Exchange  Act  or,   failing  that,   secure  NASDAQ
authorization  for such shares  and,  without  limiting  the  generality  of the
foregoing, take all actions that may be required by the Company as the issuer of
such  Registrable  Securities in order to facilitate the managing  underwriter's
arranging  for the  registration  of at least  two  market  makers  as such with
respect to such shares with the National Association of Securities Dealers, Inc.
(the "NASD").

                                    (k)  Provide  and cause to be  maintained  a
transfer agent and registrar for all such Registrable Securities covered by such
registration  statement not later than the effective  date of such  registration
statement.

                                    (l) Deliver promptly to Holders' Counsel and
each underwriter,  if any, copies of all correspondence  between the SEC and the
Company,  its counsel or auditors and all memoranda relating to discussions with
the SEC or its staff with  respect  to the  registration  statement,  other than
those  portions  of any such  memoranda  which  contain  information  subject to
attorney-client privilege with respect to the Company, and, upon receipt of such
confidentiality   agreements  as  the  Company  may  reasonably  request,   make
<PAGE>
reasonably available for inspection by Holders' Counsel, by any underwriter,  if
any,   participating  in  any  disposition  to  be  effected  pursuant  to  such
registration  statement and any attorney,  accountant or other agent retained by
any such  underwriter,  all  pertinent  financial and other  records,  pertinent
corporate  documents  and  properties  of  the  Company,  and  cause  all of the
Company's officers, directors and employees to supply all information reasonably
requested by Holders' Counsel or such underwriter, attorney, accountant or agent
in connection with such registration statement.

                                    (m) Use  reasonable  best  efforts to obtain
the withdrawal of any order  suspending the  effectiveness  of the  registration
statement.

                                    (n) Upon  written  request,  furnish to each
Holder  participating  in the  offering and the  managing  underwriter,  without
charge,  at least  one  conformed  copy of the  registration  statement  and any
post-effective amendments thereto, including financial statements and schedules,
all  documents  incorporated  therein by reference  and all exhibits  (including
those incorporated by reference).

                                    (o)  Take  all   such   other   commercially
reasonable  actions  as are  necessary  or  advisable  in order to  expedite  or
facilitate the disposition of such Registrable Securities.

                           1.5  Furnish  Information.  It shall  be a  condition
precedent to the  obligations of the Company to take any action pursuant to this
Section 1 with  respect  to the  Registrable  Securities  of the  Holders  whose
Registrable Securities are covered by the Shelf Registration Statement that each
of such Holders shall furnish to the Company such information  regarding itself,
the Registrable Securities held by it, and the intended method of disposition of
such securities as shall be required to effect the registration of such Holders'
Registrable Securities.

                           1.6 Expenses of Registration.

                                    (a)  "Expenses"  shall mean any and all fees
and expenses  incident to the Company's  performance of or compliance  with this
Article 1,  including,  without  limitation:  (i) SEC,  stock  exchange  or NASD
registration  and filing fees and all listing  fees and fees with respect to the
inclusion of  securities in NASDAQ,  (ii) fees and expenses of  compliance  with
state  securities or "blue sky" laws and in connection with the preparation of a
"blue sky" survey, including without limitation, reasonable fees and expenses of
blue sky  counsel,  (iii)  printing and copying  expenses,  (iv)  messenger  and
delivery expenses,  (v) expenses incurred in connection with any road show, (vi)
fees and  disbursements  of counsel for the Company,  (vii) with respect to each
registration,  the  fees  and  disbursements  of one  counsel  for  the  selling
Holder(s)  (selected by the Holders of two-thirds of the Registrable  Securities
then outstanding  included in such registration),  (viii) fees and disbursements
of the Company's  independent public accountants  (including the expenses of any
audit and/or  "cold  comfort"  letter) and fees and  expenses of other  persons,
including special experts,  retained by the Company,  (ix) any fees and expenses
payable  to a  Qualified  Independent  Underwriter  (as such term is  defined in
Conduct Rule 2720 of the National  Association  of  Securities  Dealers,  Inc.'s
By-Laws)  and (x) any other  fees and  disbursements  of  underwriters,  if any,
customarily paid by issuers or sellers of securities (collectively, "Expenses").
<PAGE>
                                    (b) The Company  shall pay all Expenses with
respect  to any  registration  pursuant  to  Section  1.2,  whether  or not such
registration  statement  becomes  effective or remains  effective for the period
contemplated by Section 1.2(a).

                                    (c) Notwithstanding  the foregoing,  (i) the
provisions of this Section 1.6 shall be deemed  amended to the extent  necessary
to cause these  expense  provisions to comply with "blue sky" laws of each state
in which  the  offering  is made and (ii) in  connection  with any  registration
hereunder,  each Holder of Registrable Securities being registered shall pay all
underwriting   discounts  and  commissions  and  any  transfer  taxes,  if  any,
attributable to the sale of such Registrable  Securities,  pro rata with respect
to payments of discounts and commissions in accordance with the number of shares
sold in the offering by such Holder, and (iii) the Company shall, in the case of
all  registrations  under this  Section 1, be  responsible  for all its internal
expenses  (including,  without  limitation,  all  salaries  and  expenses of its
officers and employees performing legal or accounting duties).

                           1.7  Expenses  of Company  Registration.  The Company
shall bear and pay all Expenses  incurred in  connection  with any  registration
filing  or  qualification   of  Registrable   Securities  with  respect  to  the
registrations  pursuant  to  Section  1.3 for each  Holder  (which  right may be
assigned as provided in Section 1.12), but excluding  underwriting discounts and
commissions relating to Registrable Securities.

                           1.8 Underwriting Requirements. In connection with any
offering involving an underwriting of shares of the Company's capital stock, the
Company  shall not be required  under Section 1.3 to include any of the Holders'
securities in such underwriting unless they accept the terms of the underwriting
as agreed upon  between the Company and the  underwriters  selected by it (or by
other  persons  entitled  to  select  the  underwriters),  and then only in such
quantity  as the  underwriters  determine  in  their  sole  discretion  will not
jeopardize  the success of the offering by the  Company.  If the total amount of
securities,  including Registrable  Securities,  requested by stockholders to be
included in such offering  exceeds the amount of  securities  sold other than by
the  Company  that the  underwriters  determine  in  their  sole  discretion  is
compatible with the success of the offering,  then the Company shall be required
to  include  in the  offering  only that  number of such  securities,  including
Registrable Securities, that the underwriters determine in their sole discretion
will not jeopardize  the success of the offering (the  securities so included to
be apportioned  pro rata among the selling  stockholders  according to the total
amount of  securities  entitled to be  included  therein  owned by each  selling
stockholder or in such other  proportions as shall mutually be agreed to by such
selling  stockholders)  but in no event  shall the amount of  securities  of the
selling  Holders  included in the offering be reduced below thirty percent (30%)
of the total amount of securities included in such offering. For purposes of the
preceding parenthetical  concerning  apportionment,  for any selling stockholder
that  is a  Holder  of  Registrable  Securities  and  that is a  partnership  or
corporate  partners,  retired partners and  stockholders of such Holder,  or the
estates and family  members of any such  partners  and retired  partners and any
trusts for the benefit of any of the  foregoing  persons shall be deemed to be a
single "selling  stockholder,"  and any pro-rata  reduction with respect to such
"selling  stockholder"  shall  be based  upon the  aggregate  amount  of  shares
carrying  registration rights owned by all entities and individuals  included in
such "selling stockholder," as defined in this sentence.
<PAGE>
                           1.9 Delay of Registration. The Holders shall not have
any right to obtain or seek an injunction  restraining or otherwise delaying any
such registration as the result of any controversy that might arise with respect
to the interpretation or implementation of this Section 1.

                           1.10  Indemnification.  In the event any  Registrable
Securities are included in a registration statement under this Section 1:

                                    (a) To the  extent  permitted  by  law,  the
Company will indemnify and hold harmless the Holder whose Registrable Securities
are covered by the Registration Statement, its directors, officers, fiduciaries,
employees and  stockholders  or general or limited  partners (and the directors,
officers,  employees and stockholders  thereof),  any underwriter (as defined in
the Act) for such Holders and each person,  if any, who controls such Holders or
underwriter  within the  meaning of the Act or the  Securities  Exchange  Act of
1934, as amended (the "1934 Act"), each officer, director, employee, stockholder
or  partner  of such  underwriter,  against  any  losses,  claims,  damages,  or
liabilities  (joint or several) or actions or proceedings  (whether commenced or
threatened) and expenses  (including  reasonable fees of counsel and any amounts
paid in any settlement effected with the Company's  consent),  to which they may
become subject under the Act, the 1934 Act or any state  securities law, insofar
as such losses,  claims,  damages,  or liabilities (or actions or proceedings in
respect  thereof)  ("Claims") or expenses  arise out of or are based upon any of
the following statements,  omissions or violations (collectively a "Violation"):
(i) any  untrue  statement  or  alleged  untrue  statement  of a  material  fact
contained in such registration statement,  including any preliminary prospectus,
summary  prospectus or final prospectus  contained  therein or any amendments or
supplements thereto,  together with documents incorporated by reference therein,
(ii) the omission or alleged  omission to state therein a material fact required
to  be  stated  therein,  or  necessary  to  make  the  statements  therein  not
misleading,  or (iii) any  violation or alleged  violation by the Company of the
Act,  the  1934  Act,  any  state  securities  law or  any  rule  or  regulation
promulgated  under the Act,  the 1934 Act or any state  securities  law; and the
Company  will pay to such  Holders,  and each such  underwriter  or  controlling
person any legal or other  expenses  reasonably  incurred by them in  connection
with investigating or defending any such loss, claim, damage, liability, expense
or action or proceeding;  provided,  however,  that (A) the indemnity  agreement
contained in this Section 1.10 shall not apply to amounts paid in  settlement of
any such Claim if such settlement is effected without the consent of the Company
(which consent shall not be unreasonably withheld), (B) the Company shall not be
liable in any case for any such Claim to the extent  that it arises out of or is
based upon a Violation  which  occurs in reliance  upon and in  conformity  with
written  information  furnished  expressly  for  use  in  connection  with  such
registration by any such Holders, or any such underwriter or controlling person.
Such  indemnity  and  reimbursement  of expenses  shall remain in full force and
effect regardless of any investigation  made by as on behalf of such indemnified
party and shall survive the transfer of such securities by such Holder.

                                    (b) To the  extent  permitted  by law,  each
Holder  whose  Registrable  Securities  are  covered  by the Shelf  Registration
Statement  will,  severally  and not jointly,  indemnify  and hold  harmless the
Company,  each  of its  directors,  each of its  officers  who  has  signed  the
registration statement, each person, if any, who controls the Company within the
meaning of the Act,  any  underwriter,  and any  controlling  person of any such
underwriter,  against any losses,  claims,  damages,  or  liabilities  (joint or
several) to which any of the  foregoing  persons may become  subject,  under the
Act, or the 1934 Act,  insofar as such Claim  arises out of or is based upon any
<PAGE>
Violation,  in each  case to the  extent  (and  only to the  extent)  that  such
Violation  occurs in reliance  upon and in conformity  with written  information
furnished by such Holder expressly for use in connection with such registration;
and such Holder will pay, as incurred,  any legal or other  expenses  reasonably
incurred by any person intended to be indemnified pursuant to this Section 1.10,
in connection with investigating or defending any such Claim; provided, however,
that the indemnity  agreement  contained in this Section 1.10 shall not apply to
amounts  paid in  settlement  of any such Claim if such  settlement  is effected
without the consent of such  Holder,  which  consent  shall not be  unreasonably
withheld; provided that, in no event shall any indemnity under this Section 1.10
exceed  the net  proceeds  from  the  offering  received  by such  Holder.  Such
indemnity and  reimbursement  of expenses  shall remain in full force and effect
regardless of any  investigation  made by as on behalf of such indemnified party
and shall survive the transfer of such securities by such Holder.

                                    (c) Promptly after receipt by an indemnified
party  under  this  Section  1.10 of notice of the  commencement  of any  action
(including any governmental  action), such indemnified party will, if a claim in
respect thereof is to be made against any indemnifying  party under this Section
1.10,  deliver to the  indemnifying  party a written notice of the  commencement
thereof and the indemnifying  party shall have the right to participate in, and,
to the  extent  the  indemnifying  party so  desires,  jointly  with  any  other
indemnifying party similarly noticed, to assume the defense thereof with counsel
mutually  satisfactory to the parties;  provided,  however,  that an indemnified
party  (together  with all other  indemnified  parties which may be  represented
without  conflict by one  counsel)  shall have the right to retain one  separate
counsel, with the fees and expenses to be paid by the indemnifying party, (i) if
representation  of  such  indemnified  party  by  the  counsel  retained  by the
indemnifying  party would be inappropriate due to actual or potential  differing
interests between such indemnified party and any other party represented by such
counsel  in  such  proceeding;  (ii) if the  indemnifying  party  fails  to take
reasonable steps necessary to defend  diligently the action or proceeding within
30 days after  receiving  notice from such  indemnified  party; or (iii) if such
indemnified  party who is a defendant in any action or proceeding  which is also
brought  against the  indemnifying  party  reasonably  shall have concluded that
there may be one or more legal  defenses  available  to such  indemnified  party
which are not  available  to the  indemnifying  party.  The  failure  to deliver
written  notice  to the  indemnifying  party  within  a  reasonable  time of the
commencement  of any such action,  if  prejudicial to its ability to defend such
action,   shall  relieve  such  indemnifying  party  of  any  liability  to  the
indemnified  party  under this  Section  1.10,  but the  omission  so to deliver
written  notice to the  indemnifying  party will not relieve it of any liability
that it may have to any  indemnified  party  otherwise  than under this  Section
1.10.

                                    (d) If the  indemnification  provided for in
this Section 1.10 is held by a court of competent jurisdiction to be unavailable
to an  indemnified  party  with  respect  to any Claim or  expense  referred  to
therein,  then the indemnifying  party, in lieu of indemnifying such indemnified
party  hereunder,  shall  contribute  to the  amount  paid  or  payable  by such
indemnified  party as a result of such Claim or expense in such proportion as is
appropriate to reflect the relative fault of the  indemnifying  party on the one
hand and of the indemnified party on the other in connection with the statements
or  omissions  that  resulted  in such  Claim or  expense  as well as any  other
relevant equitable considerations.  The relative fault of the indemnifying party
and of the  indemnified  party shall be  determined by reference to, among other
<PAGE>
things, whether the untrue or alleged untrue statement of a material fact or the
omission  to state a  material  fact  relates  to  information  supplied  by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge,  access to  information,  and  opportunity to correct or prevent such
statement  or  omission.  If,  however,  the  allocation  provided  in the first
sentence  of this  paragraph  is not  permitted  by  applicable  law,  then each
indemnifying  party  shall  contribute  to the  amount  paid or  payable by such
indemnified  party in such proportion as is appropriate to reflect not only such
relative faults but also the relative benefits of the indemnifying party and the
indemnified party as well as any other relevant  equitable  considerations.  The
parties  hereto agree that it would not be just and  equitable if  contributions
pursuant to this Section 1.10(d) were to be determined by pro rata allocation or
by any other method of  allocation  which does not take account of the equitable
considerations  referred to in the preceding  sentences of this Section 1.10(d).
The amount  paid or  payable in respect of any Claim  shall be deemed to include
any legal or other expenses  reasonably  incurred by such  indemnified  party in
connection  with  investigating  or defending  such Claim.  No person  guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities  Act) shall be entitled to  contribution  from any person who was not
guilty of such fraudulent  misrepresentation.  Notwithstanding  anything in this
Section 1.10(d) to the contrary,  no indemnifying party (other than the Company)
shall be required  pursuant to this Section  1.10(d) to contribute any amount in
excess of the net proceeds received by such indemnifying  party from the sale of
Registrable  Securities  in the offering to which the Claims of the  indemnified
parties  relate,  less the amount of any  indemnification  payment  made by such
indemnifying party pursuant to Sections 1.10(b).

                                    (e)  Notwithstanding  the foregoing,  to the
extent that the provisions on indemnification and contribution  contained in the
underwriting  agreement entered into in connection with the underwritten  public
offering are in conflict with the foregoing  provisions,  the  provisions in the
underwriting agreement shall control.

                                    (f)  The  obligations  of  the  Company  and
Holders under this Section 1.10 shall survive the  completion of any offering of
Registrable  Securities in a  registration  statement  under this Section 1, and
otherwise.

                           1.11 Reports Under  Securities  Exchange Act of 1934.
With a view to  making  available  to the  Holders  the  benefits  of  Rule  144
promulgated  under the Act and any other rule or  regulation of the SEC that may
at any time  permit a Holder to sell  securities  of the  Company  to the public
without  registration  or pursuant to a  registration  on Form S-3,  the Company
agrees to:

                                    (a)  make  and   keep   public   information
available,  as those  terms are  understood  and defined in SEC Rule 144, at all
times;

                                    (b) take  such  action  as is  necessary  to
maintain  the  Holder's  ability  to  utilize  Form  S-3 for the  sale of  their
Registrable Securities;

                                    (c) file with the SEC in a timely manner all
reports and other  documents  required of the Company under the Act and the 1934
Act; and
<PAGE>
                                    (d)  furnish to any  Holder,  so long as the
Holder owns any  Registrable  Securities,  forthwith  upon request (i) a written
statement by the Company that it has complied with the reporting requirements of
SEC Rule 144, the Act and the 1934 Act (at any time after it so qualifies), (ii)
a copy of the most  recent  annual or  quarterly  report of the Company and such
other  reports and  documents  filed by the Company with the SEC, and (iii) such
other  information as may be reasonably  requested in availing any Holder of any
rule or regulation  of the SEC which permits the selling of any such  securities
without registration or pursuant to such form.


                           1.12     Assignment of Registration Rights.

                                    (a) The  rights  to  cause  the  Company  to
register Registrable  Securities pursuant to this Section 1 may be assigned (but
only with all related  obligations)  by a Holder to a transferee or assignees of
such  securities  who  acquires  at least two  percent  (2%) of the  Registrable
Securities (as adjusted for stock splits,  combinations and the like), provided:
(i) the Company is, within a reasonable time after such transfer, furnished with
written  notice of the name and address of such  transferee  or assignee and the
securities  with respect to which such  registration  rights are being assigned;
(ii) such transferee or assignee agrees in writing to be bound by and subject to
the terms and conditions of this Agreement,  including,  without limitation, the
provisions of Section 1.14 below;  and (iii) such assignment  shall be effective
only if such  transfer  is  exempt  from  registration  under  the Act.  For the
purposes of determining the number of shares of Registrable Securities held by a
transferee  or  assignee,   the  holding  of  transferees  and  assignees  of  a
partnership who are partners or retired partners of such partnership  (including
spouses and  ancestors,  lineal  descendants  and  siblings of such  partners or
spouses  who  acquire   Registrable   Securities  by  gift,  will  or  intestate
succession) shall be aggregated together with the partnership; provided that all
assignees and transferees who would not qualify  individually  for assignment of
registration  rights  shall have a single  attorney-in-fact  for the  purpose of
exercising any rights, receiving notices or taking any action under this Section
1.

                                    (b)  Subject to clause (a) above,  the right
to have the Company register the Registrable Securities pursuant to this Section
1 may not  otherwise be assigned;  provided,  however,  that (i) any heir or the
estate of an  Investor  which  acquires  the  Registrable  Securities  from such
Investor by will or intestate  succession  shall be entitled to have the Company
register the  Registrable  Securities  pursuant to this Section 1 (provided that
such heirs or such estate shall have a single  attorney-in-fact  for the purpose
of exercising any rights,  receiving any notices or taking any action under this
Section  1),  and (ii) any  individual  Investor  may sell,  assign or  transfer
Registrable  Securities  to  his  or  her  spouse  or  children  or  to a  trust
established  for the  benefit  of his or her  spouse,  children  or  himself  or
herself,  and such transferee shall be entitled to have the Company register the
Registrable  Securities  pursuant  to this  Section  1, if,  and  only if,  such
transferee agrees in writing to be bound by the terms of this Agreement. In each
such event and for purposes of this Agreement,  the term "Holder" as used herein
shall include all such heirs, such estate or such transferees.
<PAGE>
                           1.13 Limitations on Subsequent  Registration  Rights.
From and after the date of this  Agreement,  the Company shall not,  without the
prior written consent of the Holders of two-thirds of the Registrable Securities
then outstanding, enter into any agreement with any holder or prospective holder
of any  securities  of the Company  that would allow such holder or  prospective
holder (a) to include such  securities in any  registration  filed under Section
1.2 hereof, unless under the terms of such agreement, such holder or prospective
holder may include such securities in any such  registration  only to the extent
that  the  inclusion  of his  securities  will  not  reduce  the  amount  of the
Registrable  Securities  of the Holders that is included or (b) to make a demand
registration  that could result in such  registration  statement  being declared
effective  within one hundred  twenty  (120) days of the  effective  date of any
registration effected pursuant to Section 1.2.

                           1.14  "Market  Stand-Off"  Agreement.  Each  Investor
hereby agrees that,  during the period of duration  specified by the Company and
an underwriter of Common Stock or other securities of the Company, following the
effective date of a  registration  statement of the Company filed under the Act,
it shall not,  to the extent  requested  by the  Company  and such  underwriter,
directly or indirectly sell, offer to sell, contract to sell (including, without
limitation,  any short sale), grant any option to purchase or otherwise transfer
or  dispose  of (other  than to  donees  who agree to be  similarly  bound)  any
securities  of the Company  held by it at any time  during  such  period  except
Common Stock included in such  registration,  and each Investor  agrees to enter
into an agreement to such effect with such underwriter;  provided, however, that
(a) all officers and  directors  of the Company  enter into similar  agreements,
and, (b) such market  stand-off  time period  shall not exceed 120 days.  If the
underwriters agree to any waivers of such restrictions, then the Investors shall
be  entitled  to sell,  transfer  or  dispose  of the same  number  or amount of
securities of the Company as the person or entity  receiving  such waiver,  upon
the same terms and conditions set forth in such waiver.

                           In order  to  enforce  the  foregoing  covenant,  the
Company may impose  stop-transfer  instructions  with respect to the Registrable
Securities of the Investors  (and the shares or securities of every other person
subject to the foregoing restriction) until the end of such period.

                           1.15 No  Required  Sale.  Nothing  in this  Agreement
shall be deemed to create an independent obligation on the part of any Holder to
sell  any  Registrable   Securities  pursuant  to  any  effective   registration
statement.

                  2.       Miscellaneous.

                           2.1  Successors  and  Assigns.  Except  as  otherwise
provided  herein,  and provided that the transfer or assignment is in accordance
with the terms hereof, the terms and conditions of this Agreement shall inure to
the benefit of and be binding upon the respective  successors and assigns of the
parties  (including  any  permitted  transferees  of any  shares of  Registrable
Securities).  Nothing in this  Agreement,  express or  implied,  is  intended to
confer  upon  any  party  other  than the  parties  hereto  or their  respective
successors and assigns any rights, remedies,  obligations,  or liabilities under
or by reason of this Agreement, except as expressly provided in this Agreement.

                           2.2 Governing Law. This  Agreement  shall be governed
by and  construed  under  the laws of the  State of New York  without  regard to
principles of conflicts or choice of laws.
<PAGE>
                           2.3  Counterparts.  This Agreement may be executed in
two or more counterparts,  each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

                           2.4 Titles and  Subtitles.  The titles and  subtitles
used  in  this  Agreement  are  used  for  convenience  only  and  are not to be
considered in construing or interpreting this Agreement.

                           2.5 Notices.  Unless otherwise  provided,  any notice
required or permitted  under this Agreement  shall be given in writing and shall
be deemed  effectively  given upon personal delivery to the party to be notified
or upon deposit with the United  States Post Office,  by registered or certified
mail,  postage  prepaid and addressed to the party to be notified at the address
indicated  for such  party in the Stock  Purchase  Agreement,  or at such  other
address as such party may designate by ten (10) days' advance  written notice to
the other parties.

                           2.6  Expenses.  If any  action at law or in equity is
necessary to enforce or interpret the terms of this  Agreement,  the  prevailing
party shall be entitled  to  reasonable  attorneys'  fees,  costs and  necessary
disbursements  in  addition  to any  other  relief  to which  such  party may be
entitled.

                           2.7  Amendments   and  Waivers.   Any  term  of  this
Agreement may be amended and the observance of any term of this Agreement may be
waived (either generally or in a particular instance and either retroactively or
prospectively),  only with the written consent of the Company and the Holders of
two-thirds of the  Registrable  Securities  then  outstanding.  Any amendment or
waiver  effected in accordance  with this Section 2.7 shall be binding upon each
Holder of any Registrable Securities then outstanding, each future Holder of all
such Registrable Securities, and the Company.

                           2.8  Severability.  If one or more provisions of this
Agreement are held to be  unenforceable  under  applicable  law, such  provision
shall be excluded from this Agreement and the balance of the Agreement  shall be
interpreted  as if such  provision  were so excluded and shall be enforceable in
accordance with its terms.

                           2.9 Nominees for  Beneficial  Owners.  If Registrable
Securities  are  held  by a  nominee  for  the  beneficial  owner  thereof,  the
beneficial  owner  thereof may, at its option,  be treated as the Holder of such
Registrable Securities for purposes of any request or other action by any Holder
or  Holders  of  Registrable  Securities  pursuant  to  this  Agreement  (or any
determination  of any number or  percentage of shares  constituting  Registrable
Securities held by any Holder or Holders of Registrable Securities  contemplated
by this  Agreement),  provided that the Company  shall have received  assurances
reasonably satisfactory to it of such beneficial ownership.

                           2.10  Specific   Performance.   The  parties   hereto
acknowledge  that there would be no adequate remedy at law if any party fails to
perform any of its obligations hereunder, and accordingly agree that each party,
in addition to any other remedy to which it may be entitled at law or in equity,
shall be entitled to  injunctive  relief,  including  specific  performance,  to
enforce  such  obligations  without the posting of any bond,  and, if any action
should be brought in equity to enforce any of the provisions of this  Agreement,
none of the parties  hereto  shall  raise the defense  that there is an adequate
remedy at law.
<PAGE>
                           2.11 No Inconsistent  Agreements.  The rights granted
to the Holders of  Registrable  Securities  hereunder do not in any way conflict
with and are not inconsistent  with any other agreements to which the Company is
a party or by which it is  bound.  Without  the  prior  written  consent  of the
holders of two-thirds of the Registrable  Securities then  outstanding,  neither
the Company nor any Holder will, on or after the date of this  Agreement,  enter
into any agreement with respect to its securities which is inconsistent with the
rights  granted in this  Agreement or otherwise  conflicts  with the  provisions
hereof,  other than any lock-up  agreement with the  underwriters  in connection
with any registered offering effected  hereunder,  pursuant to which the Company
shall agree not to register for sale, and the Company shall agree not to sell or
otherwise  dispose  of,  Common  Stock  or any  securities  convertible  into or
exercisable or exchangeable  for Common Stock,  for a specified period following
the  registered  offering.   The  Company  further  agrees  that  if  any  other
registration rights agreement entered into after the date of this Agreement with
respect to any of its securities  contains terms which are more favorable to, or
less  restrictive  on, the other party thereto than the terms and  conditions in
this  Agreement are (insofar as they are  applicable  to the Holders),  then the
terms and conditions of this Agreement shall  immediately be deemed to have been
amended  without  further  action  by the  Company  or any  of  the  Holders  of
Registrable  Securities  so that the Holders shall be entitled to the benefit of
any such more favorable or less restrictive terms or conditions.

                           2.12 Entire Agreement.  This Agreement (including the
Exhibits  hereto,  if any)  constitutes  the full and entire  understanding  and
agreement between the parties with regard to the subjects hereof and thereof.




<PAGE>



                  IN  WITNESS   WHEREOF,   the  parties   have   executed   this
Registration Rights Agreement as of the date first above written.


   


                                 EXOGEN, INC.    
                                                
                                                       
                                                                
                                 By:    /s/ Patrick A. McBrayer 
                                        ----------------------- 
                                 Name:  Patrick A. McBrayer     
                                 Title: President and Chief Executive Officer 
                                                                     
                                 Address:      10 Constitution Avenue           
                                               P.O. Box 6860          
                                               Piscataway, NJ 08855  
                                                       
                                                                                
                                 INVESTORS:                                     
                                                                                
                                 DELPHI VENTURES III, L.P.                      
                                                                                
                                 By:     Delphi Management Partners III, L.L.C.,
                                         General Partner                        
                                                                                
                                                   
                                 By:     /s/ Donald J. Lothrop 
                                         --------------------- 
                                 Name:   Donald J. Lothrop                      
                                 Title:  Managing Member                        
                                                                                
                                                                                
                                 DELPHI BIO-INVESTMENTS III, L.P.               
                                                                                
                                 By:     Delphi Management Partners III, L.L.C.,
                                         General Partners                       
                                                                                
                                                                                
                                 By:     /s/ Donald J. Lothrop                  
                                         ---------------------                  
                                 Name:   Donald J. Lothrop                      
                                 Title:  Managing Member 
                       
                                                                                
                         






                          REGISTRATION RIGHTS AGREEMENT
                                 
<PAGE>



                                   THE DEMETER TRUST DTD 6/5/90
                                   TRUSTEE


                                   By:   /s/ Richard Johnston
                                         --------------------
                                   Name: Richard Johnston



                                   ALEXANDRA F. JOHNSTON TRUST DTD
                                   11/6/78
                                   Trustee

                                   By:   /s/ Richard Johnston
                                         --------------------
                                   Name: Richard Johnston



                                   BRADFORD D. JOHNSTON TRUST DTD
                                   11/6/78
                                   Trustee

                                   By:   /s/ Richard Johnston
                                         --------------------
                                   Name: Richard Johnston



                                   WILLIAM M. JOHNSTON TRUST DTD
                                   11/6/7
                                   Trustee

                                   By:   /s/ Richard Johnston
                                         --------------------
                                   Name: Richard Johnston



                                   ROBERT F. JOHNSTON


                                   By: /s/ Robert F. Johnston
                                       ----------------------
                                       Robert F. Johnston







                          REGISTRATION RIGHTS AGREEMENT

<PAGE>




                                   PEQUOT PRIVATE EQUITY FUND L.P.


                                   By:      /s/ Amiel Peretz
                                            ----------------
                                   Name:    Amiel Peretz
                                   Title:   CFO, DSCMI Inv. Mgr.


                                   PEQUOT OFFSHORE PRIVATE EQUITY
                                   FUND, INC.


                                   By:      /s/ Amiel Peretz
                                            ------------------
                                   Name:    Amiel Peretz
                                   Title:   CFO, DSCMI Inv. Mgr.




                          REGISTRATION RIGHTS AGREEMENT

<PAGE>





                           PIPER JAFFRAY HEALTHCARE CAPITAL
                           LIMITED PARTNERSHIP (SBIC)

                           By:      Piper Ventures Management IV Limited
                                    Partnership, its General Partner


                           By:      /s/ Buzz Benson
                                    ---------------
                                    Buzz Benson, Managing Director Piper
                                    Ventures Capital, Inc., Its General Partner




                          REGISTRATION RIGHTS AGREEMENT

<PAGE>



                                   TERENCE D. WALL


               
                                   By: /s/ Terence D. Wall
                                       -------------------
                                       Terence D. Wall


                          REGISTRATION RIGHTS AGREEMENT


                                                                   EXHIBIT 10.20


                                  EXOGEN, INC.
                      1995 STOCK OPTION/STOCK ISSUANCE PLAN
                      -------------------------------------

                     (As Amended through November 14, 1997)
                     --------------------------------------

                                   ARTICLE ONE

                               GENERAL PROVISIONS
                               ------------------


        I.        PURPOSE OF THE PLAN

                  This 1995 Stock  Option/Stock  Issuance  Plan is  intended  to
promote the  interests  of Exogen,  Inc., a Delaware  corporation,  by providing
eligible  persons with the  opportunity  to acquire a proprietary  interest,  or
otherwise  increase  their  proprietary  interest,  in  the  Corporation  as  an
incentive for them to remain in the service of the Corporation.

                  Capitalized  terms  shall have the  meanings  assigned to such
terms in the attached Appendix.

       II.        STRUCTURE OF THE PLAN

                  A. The  Plan  shall  be  divided  into  four  separate  equity
programs:

                                  (i) the  Discretionary  Option  Grant  Program
         under  which  eligible  persons  may,  at the  discretion  of the  Plan
         Administrator, be granted options to purchase shares of Common Stock,

                                  (ii)  the  Salary   Investment   Option  Grant
         Program under which  eligible  employees may elect to have a portion of
         their base salary  invested each year in options to purchase  shares of
         Common Stock,

                                  (iii) the Stock  Issuance  Program under which
         eligible persons may, at the discretion of the Plan  Administrator,  be
         issued shares of Common Stock  directly,  either  through the immediate
         purchase  of  such  shares  or as a bonus  for  services  rendered  the
         Corporation (or any Parent or Subsidiary), and

                                  (iv) the Automatic  Option Grant Program under
         which Eligible Directors shall  automatically  receive option grants at
         periodic intervals to purchase shares of Common Stock.

                  B. The  provisions  of Articles One and Six shall apply to all
equity programs under the Plan and shall accordingly govern the interests of all
persons under the Plan.

      III.        ADMINISTRATION OF THE PLAN

                  A.  The  Board  shall  have   authority  to   administer   the
Discretionary  Option Grant,  Salary  Investment Option Grant and Stock Issuance
Programs with respect to Section 16 Insiders. However the Board may, at its sole
discretion, delegate such authority to the Primary Committee.
<PAGE>
                  B.  Administration of the Discretionary  Option Grant,  Salary
Investment  Option Grant and Stock  Issuance  Programs with respect to all other
persons   eligible  to  participate  in  those  programs  may,  at  the  Board's
discretion,  be vested in the Primary Committee or a Secondary Committee, or the
Board may retain the power to  administer  those  programs  with respect to such
persons.

                  C. Members of the Primary Committee or any Secondary Committee
shall  serve  for such  period of time as the  Board  may  determine  and may be
removed by the Board at any time.  The Board may also at any time  terminate the
functions of any  committee  and reassume  all powers and  authority  previously
delegated to such committee.

                  D.  Each Plan  Administrator  shall,  within  the scope of its
administrative  functions under the Plan, have full power and authority (subject
to the provisions of the Plan) to establish such rules and regulations as it may
deem appropriate for proper  administration of the  Discretionary  Option Grant,
Salary  Investment  Option  Grant and Stock  Issuance  Programs and to make such
determinations  under, and issue such interpretations of, the provisions of such
programs and any  outstanding  options or stock  issuances  thereunder as it may
deem  necessary or  advisable.  Decisions of the Plan  Administrator  within the
scope of its administrative  functions under the Plan shall be final and binding
on all parties who have an interest in the  Discretionary  Option Grant,  Salary
Investment  Option Grant or Stock Issuance Program under its jurisdiction or any
option or stock issuance thereunder.

                  E. Service on the Primary Committee or the Secondary Committee
shall constitute  service as a Board member,  and members of each such committee
shall accordingly be entitled to full indemnification and reimbursement as Board
members for their service on such committee.  No member of the Primary Committee
or the Secondary  Committee shall be liable for any act or omission made in good
faith with respect to the Plan or any option grants or stock issuances under the
Plan.

                  F.  Administration of the Automatic Option Grant Program shall
be  self-executing  in accordance  with the terms of that  program,  and no Plan
Administrator shall exercise any discretionary  functions with respect to option
grants made thereunder.

      IV.         ELIGIBILITY

                  A. The persons  eligible to participate  in the  Discretionary
Option Grant and Stock Issuance Programs are as follows:

                                 (i) Employees,

                                 (ii)  non-employee  members of the Board or the
         board of directors of any Parent or Subsidiary, and

                                 (iii)   consultants   and   other   independent
         advisors  who  provide  services to the  Corporation  (or any Parent or
         Subsidiary).

                  B. Only  Employees  shall be  eligible to  participate  in the
Salary Investment Option Grant Program.
<PAGE>
                  C.  Each Plan  Administrator  shall,  within  the scope of its
administrative  jurisdiction  under the Plan,  have full authority to determine,
(i) with respect to the option grants under the  Discretionary  Option Grant and
Salary Investment  Option Grant Programs,  which eligible persons are to receive
option  grants,  the time or times when such option  grants are to be made,  the
number of shares to be covered  by each such  grant,  the status of the  granted
option as either an  Incentive  Option or a  Non-Statutory  Option,  the time or
times at which each option is to become  exercisable,  the vesting  schedule (if
any)  applicable  to the option shares and the maximum term for which the option
is to remain  outstanding  and (ii) with  respect to stock  issuances  under the
Stock Issuance  Program,  which eligible persons are to receive stock issuances,
the time or times when such issuances are to be made, the number of shares to be
issued to each  Participant,  the vesting  schedule (if any)  applicable  to the
issued  shares  and the  consideration  to be paid by the  Participant  for such
shares.

                  D. The Plan Administrator  shall have the absolute  discretion
either to grant options in accordance with the Discretionary Option Grant and/or
Salary  Investment  Option  Grant  Program  or  to  effect  stock  issuances  in
accordance with the Stock Issuance Program.

                  E. The  individuals  eligible to  participate in the Automatic
Option Grant Program shall be those  individuals  who first become  non-employee
Board members after the Effective Date, whether through appointment by the Board
or  election  by the  Corporation's  stockholders,  and  those  individuals  who
continue to serve as  non-employee  Board members  after the  Effective  Date. A
non-employee  Board  member  who  has  previously  been  in  the  employ  of the
Corporation  (or any Parent or  Subsidiary)  shall not be eligible to receive an
option  grant under the  Automatic  Option  Grant  Program at the time he or she
first becomes a non-employee Board member, but such individual shall be eligible
to receive  periodic option grants under the Automatic Option Grant Program upon
his or her  continued  service  as a  non-employee  Board  member at one or more
Annual Stockholders Meetings.

        V.        STOCK SUBJECT TO THE PLAN

                  A. The  stock  issuable  under  the Plan  shall be  shares  of
authorized but unissued or reacquired Common Stock, including shares repurchased
by the  Corporation  on the open market.  The maximum number of shares of Common
Stock which may be issued  over the term of the Plan shall not exceed  1,350,000
shares.  Such authorized  share reserve reflects the 1-for-2 reverse stock split
effected  prior to the  Effective  Date and is  comprised  of (i) the  number of
shares which remained  available for issuance,  as of the Effective Date,  under
the  Predecessor  Plan  as  last  approved  by the  Corporation's  stockholders,
including the shares subject to the outstanding  options  incorporated  into the
Plan and any other  shares  which would have been  available  for future  option
grants under the Predecessor Plan, (ii) an increase of 500,000 shares authorized
by the  Board  and  approved  by the  Corporation's  stockholders  prior  to the
Effective Date and (iii) an increase of 600,000  shares  authorized by the Board
in November 1997,  subject to approval by the Corporation's  stockholders at the
1998 Annual Meeting.

                  B.  No one  person  participating  in  the  Plan  may  receive
options,  separately  exercisable  stock  appreciation  rights and direct  stock
issuances for more than 300,000 shares of Common Stock per calendar year.
<PAGE>
                  C. Shares of Common Stock subject to outstanding options shall
be  available  for  subsequent  issuance  under the Plan to the  extent  (i) the
options (including any options incorporated from the Predecessor Plan) expire or
terminate  for any reason  prior to  exercise  in full or (ii) the  options  are
cancelled in accordance with the cancellation-regrant provisions of Article Two.
Unvested shares issued under the Plan and subsequently  cancelled or repurchased
by the  Corporation,  at the  original  exercise or direct  issue price paid per
share,  pursuant to the Corporation's  repurchase rights under the Plan shall be
added back to the number of shares of Common Stock  reserved for issuance  under
the Plan and shall  accordingly be available for reissuance  through one or more
subsequent  option  grants or direct stock  issuances  under the Plan.  However,
shares  subject  to  any  options  surrendered  in  connection  with  the  stock
appreciation right provisions of the Plan shall not be available for reissuance.
In addition,  should the exercise  price of an option under the Plan  (including
any option incorporated from the Predecessor Plan) be paid with shares of Common
Stock or should  shares of Common  Stock  otherwise  issuable  under the Plan be
withheld by the Corporation in satisfaction of the withholding taxes incurred in
connection  with the  exercise of an option or the  vesting of a stock  issuance
under the Plan, then the number of shares of Common Stock available for issuance
under the Plan  shall be  reduced  by the gross  number of shares  for which the
option is exercised or which vest under the stock  issuance,  and not by the net
number of shares of Common  Stock  issued to the holder of such  option or stock
issuance.

                  D. Should any change be made to the Common  Stock by reason of
any stock  split,  stock  dividend,  recapitalization,  combination  of  shares,
exchange of shares or other change  affecting the outstanding  Common Stock as a
class  without  the   Corporation's   receipt  of   consideration,   appropriate
adjustments  shall be made to (i) the maximum  number and/or class of securities
issuable  under the Plan,  (ii) the number and/or class of securities  for which
any one person may be granted options, separately exercisable stock appreciation
rights and direct stock  issuances  per calendar  year,  (iii) the number and/or
class of securities  for which  automatic  option grants are to be  subsequently
made per Eligible Director under the Automatic Option Grant Program and (iv) the
number  and/or class of  securities  and the exercise  price per share in effect
under  each  outstanding  option  (including  any option  incorporated  from the
Predecessor  Plan) in order to prevent the dilution or  enlargement  of benefits
thereunder. The adjustments determined by the Plan Administrator shall be final,
binding and conclusive.
<PAGE>
                                   ARTICLE TWO

                       DISCRETIONARY OPTION GRANT PROGRAM


        I.        OPTION TERMS

                  Each option shall be evidenced by one or more documents in the
form  approved  by the Plan  Administrator;  provided,  however,  that each such
document shall comply with the terms specified below.  Each document  evidencing
an Incentive Option shall, in addition, be subject to the provisions of the Plan
applicable to such options.

                  A. Exercise Price.

                           1. The exercise price per share shall be fixed by the
Plan Administrator but shall not be less than the Fair Market Value per share of
Common Stock on the option grant date.

                           2. The exercise  price shall become  immediately  due
upon exercise of the option and shall, subject to the provisions of Section I of
Article Six and the documents  evidencing the option,  be payable in one or more
of the forms specified below:

                                  (i)  cash  or  check   made   payable  to  the
         Corporation,

                                  (ii)  shares  of  Common  Stock  held  for the
         requisite  period  necessary  to  avoid a charge  to the  Corporation's
         earnings  for  financial  reporting  purposes and valued at Fair Market
         Value on the Exercise Date, or

                                  (iii) to the extent  the  option is  exercised
         for vested  shares,  through a special  sale and  remittance  procedure
         pursuant to which the Optionee shall concurrently  provide  irrevocable
         written instructions to (a) a Corporation-designated  brokerage firm to
         effect  the  immediate  sale of the  purchased  shares and remit to the
         Corporation, out of the sale proceeds available on the settlement date,
         sufficient funds to cover the aggregate  exercise price payable for the
         purchased  shares plus all applicable  Federal,  state and local income
         and  employment  taxes  required to be withheld by the  Corporation  by
         reason  of such  exercise  and  (b)  the  Corporation  to  deliver  the
         certificates  for the purchased  shares directly to such brokerage firm
         in order to complete the sale transaction.

                  Except to the extent  such sale and  remittance  procedure  is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.

                  B.  Exercise  and  Term  of  Options.  Each  option  shall  be
exercisable  at such time or times,  during  such  period and for such number of
shares as shall be  determined  by the Plan  Administrator  and set forth in the
documents evidencing the option.  However, no option shall have a term in excess
of ten (10) years measured from the option grant date.
<PAGE>
                  C. Effect of Termination of Service.

                           1. The following provisions shall govern the exercise
of any  options  held by the  Optionee  at the time of  cessation  of Service or
death:

                                (i) Any  option  outstanding  at the time of the
         Optionee's cessation of Service for any reason shall remain exercisable
         for such period of time  thereafter  as shall be determined by the Plan
         Administrator and set forth in the documents evidencing the option, but
         no such option shall be exercisable  after the expiration of the option
         term.

                                (ii) Any option  exercisable in whole or in part
         by the Optionee at the time of death may be  subsequently  exercised by
         the personal  representative  of the Optionee's estate or by the person
         or persons to whom the option is transferred pursuant to the Optionee's
         will or in accordance with the laws of descent and distribution.

                                (iii)   During   the   applicable   post-Service
         exercise  period,  the option may not be exercised in the aggregate for
         more  than the  number  of  vested  shares  for  which  the  option  is
         exercisable  on the date of the Optionee's  cessation of Service.  Upon
         the expiration of the applicable  exercise  period or (if earlier) upon
         the expiration of the option term, the option shall terminate and cease
         to be  outstanding  for any vested  shares for which the option has not
         been  exercised.  However,  the  option  shall,  immediately  upon  the
         Optionee's cessation of Service,  terminate and cease to be outstanding
         to the extent it is not otherwise at that time  exercisable  for vested
         shares.

                                (iv) Should the Optionee's Service be terminated
         for Misconduct, then all outstanding options held by the Optionee shall
         terminate immediately and cease to be outstanding.

                                (v) In the event of an  Involuntary  Termination
         following a Corporate Transaction,the provisions of Section III of this
         Article Two shall govern the period for which the  outstanding  options
         are to remain exercisable following the Optionee's cessation of Service
         and shall supersede any provisions to the contrary in this Section.

                           2. The Plan Administrator  shall have the discretion,
exercisable  either at the time an option is  granted  or at any time  while the
option remains outstanding, to:

                                (i)  extend  the  period  of time for  which the
         option is to remain exercisable  following the Optionee's  cessation of
         Service  from the period  otherwise  in effect for that  option to such
         greater   period  of  time  as  the  Plan   Administrator   shall  deem
         appropriate,  but in no event beyond the expiration of the option term,
         and/or
<PAGE>
                                (ii) permit the option to be  exercised,  during
         the applicable  post-Service  exercise period, not only with respect to
         the number of vested  shares of Common  Stock for which such  option is
         exercisable at the time of the Optionee's cessation of Service but also
         with  respect  to one or more  additional  installments  in  which  the
         Optionee would have vested under the option had the Optionee  continued
         in Service.

                  D. Stockholder  Rights.  The holder of an option shall have no
stockholder  rights with respect to the shares  subject to the option until such
person shall have  exercised  the option,  paid the exercise  price and become a
holder of record of the purchased shares.

                  E. Repurchase Rights.  The Plan  Administrator  shall have the
discretion to grant options which are  exercisable for unvested shares of Common
Stock. Should the Optionee cease Service while holding such unvested shares, the
Corporation  shall have the right to repurchase,  at the exercise price paid per
share, any or all of those unvested shares. The terms upon which such repurchase
right shall be exercisable  (including the period and procedure for exercise and
the appropriate  vesting schedule for the purchased shares) shall be established
by the  Plan  Administrator  and  set  forth  in the  document  evidencing  such
repurchase right.

                  F. Limited  Transferability of Options. During the lifetime of
the Optionee,  Incentive  Options shall be exercisable  only by the Optionee and
shall not be  assignable  or  transferable  other than by will or by the laws of
descent and distribution  following the Optionee's death. However,  Nonstatutory
Options may, in connection with the Optionee's estate plan, be assigned in whole
or in  part  during  the  Optionee's  lifetime  to one or  more  members  of the
Optionee's  immediate  family or to a trust  established  exclusively for one or
more such family  members.  The  assigned  portion may only be  exercised by the
person or persons who acquire a proprietary  interest in the option  pursuant to
the assignment.  The terms  applicable to the assigned portion shall be the same
as those in effect for the option immediately prior to such assignment and shall
be set forth in such documents issued to the assignee as the Plan  Administrator
may deem appropriate.

      II.         INCENTIVE OPTIONS

                  The terms specified below shall be applicable to all Incentive
Options.  Except as  modified  by the  provisions  of this  Section  II, all the
provisions  of  Articles  One,  Two and Six  shall be  applicable  to  Incentive
Options. Options which are specifically designated as Non-Statutory Options when
issued under the Plan shall not be subject to the terms of this Section II.

                  A.  Eligibility.  Incentive  Options  may only be  granted  to
Employees.

                  B.  Dollar   Limitation.   The  aggregate  Fair  Market  Value
(determined as of the respective date or dates of grant) of the shares of Common
Stock for which one or more options  granted to any Employee  under the Plan (or
any other option plan of the  Corporation or any Parent or  Subsidiary)  may for
the first  time  become  exercisable  as  Incentive  Options  during any one (1)
calendar  year  shall  not  exceed  the  sum of  One  Hundred  Thousand  Dollars
($100,000).  To the extent the Employee holds two (2) or more such options which
become  exercisable  for the first time in the same calendar year, the foregoing
limitation on the  exercisability  of such options as Incentive Options shall be
applied on the basis of the order in which such options are granted.
<PAGE>
                  C.  10%  Stockholder.  If any  Employee  to whom an  Incentive
Option is granted is a 10% Stockholder,  then the exercise price per share shall
not be less than one  hundred ten  percent  (110%) of the Fair Market  Value per
share of Common  Stock on the option  grant date,  and the option term shall not
exceed five (5) years measured from the option grant date.

      III.        CORPORATE TRANSACTION/CHANGE IN CONTROL

                  A. In the event of any Corporate Transaction, each outstanding
option  shall   automatically   accelerate  so  that  each  such  option  shall,
immediately  prior to the effective  date of the Corporate  Transaction,  become
fully  exercisable  for all of the shares of Common Stock at the time subject to
such option and may be exercised for any or all of those shares as  fully-vested
shares of Common Stock.  However,  an outstanding option shall not so accelerate
if and to the  extent:  (i) such  option is, in  connection  with the  Corporate
Transaction,  either to be  assumed  by the  successor  corporation  (or  parent
thereof) or to be replaced  with a comparable  option to purchase  shares of the
capital stock of the successor corporation (or parent thereof), (ii) such option
is to be replaced with a cash  incentive  program of the  successor  corporation
which preserves the spread existing on the unvested option shares at the time of
the Corporate  Transaction and provides for subsequent payout in accordance with
the same vesting schedule applicable to such option or (iii) the acceleration of
such option is subject to other limitations imposed by the Plan Administrator at
the time of the option grant. The  determination of option  comparability  under
clause (i) above shall be made by the Plan Administrator,  and its determination
shall be final, binding and conclusive.

                  B. All  outstanding  repurchase  rights  shall also  terminate
automatically, and the shares of Common Stock subject to those terminated rights
shall  immediately  vest in full,  in the  event of any  Corporate  Transaction,
except to the  extent:  (i) those  repurchase  rights are to be  assigned to the
successor  corporation  (or parent  thereof) in connection  with such  Corporate
Transaction or (ii) such accelerated  vesting is precluded by other  limitations
imposed by the Plan Administrator at the time the repurchase right is issued.

                  C.  Immediately  following the  consummation  of the Corporate
Transaction,   all   outstanding   options  shall  terminate  and  cease  to  be
outstanding,  except to the extent  assumed  by the  successor  corporation  (or
parent thereof).

                  D. Each option which is assumed in connection with a Corporate
Transaction  shall be appropriately  adjusted,  immediately after such Corporate
Transaction,  to apply to the number and class of  securities  which  would have
been issuable to the Optionee in consummation of such Corporate  Transaction had
the option  been  exercised  immediately  prior to such  Corporate  Transaction.
Appropriate  adjustments  shall  also be made to (i) the  number  and  class  of
securities  available  for issuance  under the Plan on both an aggregate and per
individual  basis following the  consummation of such Corporate  Transaction and
(ii) the  exercise  price  payable  per share  under  each  outstanding  option,
provided the aggregate  exercise price payable for such securities  shall remain
the same.

                  E. Any options  which are assumed or replaced in the Corporate
Transaction  and do not otherwise  accelerate  at that time shall  automatically
accelerate (and any of the Corporation's  outstanding repurchase rights which do
not  otherwise  terminate  at  the  time  of  the  Corporate  Transaction  shall
automatically  terminate  and the  shares  of  Common  Stock  subject  to  those
<PAGE>
terminated  rights shall  immediately  vest in full) in the event the Optionee's
Service should  subsequently  terminate by reason of an Involuntary  Termination
within  eighteen  (18) months  following the  effective  date of such  Corporate
Transaction.   Any  options  so  accelerated   shall  remain   exercisable   for
fully-vested  shares until the earlier of (i) the  expiration of the option term
or (ii) the  expiration of the one (1)-year  period  measured from the effective
date of the Involuntary Termination.

                  F. Each outstanding option shall automatically accelerate (and
any outstanding  repurchase rights shall automatically  terminate and the shares
of Common Stock subject to those  terminated  rights shall  immediately  vest in
full) in the event  the  Optionee's  Service  should  terminate  by reason of an
Involuntary Termination within eighteen (18) months following the effective date
of a Change in Control.  Any options so accelerated shall remain exercisable for
fully-vested  shares until the earlier of (i) the  expiration of the option term
(ii) the expiration of the one (1)-year  period measured from the effective date
of the Involuntary Termination.

                  G.  The  portion  of  any  Incentive  Option   accelerated  in
connection  with a  Corporate  Transaction  or Change in  Control  shall  remain
exercisable as an Incentive Option only to the extent the applicable One Hundred
Thousand Dollar limitation is not exceeded. To the extent such dollar limitation
is exceeded,  the  accelerated  portion of such option shall be exercisable as a
Non-Statutory Option under the Federal tax laws.

                  H. The grant of options under the  Discretionary  Option Grant
Program  shall  in no way  affect  the  right  of  the  Corporation  to  adjust,
reclassify,  reorganize or otherwise change its capital or business structure or
to merge, consolidate,  dissolve,  liquidate or sell or transfer all or any part
of its business or assets.

       IV.        CANCELLATION AND REGRANT OF OPTIONS

                  The Plan Administrator  shall have the authority to effect, at
any time and from time to time, with the consent of the affected option holders,
the  cancellation  of any or all  outstanding  options  under the  Discretionary
Option  Grant  Program  (including  outstanding  options  incorporated  from the
Predecessor  Plan) and to grant in substitution new options covering the same or
different  number of shares of Common Stock but with an exercise price per share
based on the Fair Market Value per share of Common Stock on the new option grant
date.

        V.        STOCK APPRECIATION RIGHTS

                  A. The Plan Administrator  shall have full power and authority
to grant to selected Optionees tandem stock  appreciation  rights and/or limited
stock appreciation rights.

                  B. The following  terms shall govern the grant and exercise of
tandem stock appreciation rights:

                                  (i) One or more  Optionees  may be granted the
         right,  exercisable  upon  such  terms  as the Plan  Administrator  may
         establish,  to elect between the exercise of the underlying  option for
         shares of Common Stock and the surrender of that option in exchange for
         a distribution from the Corporation in an amount equal to the excess of
<PAGE>
         (a) the Fair Market Value (on the option  surrender date) of the number
         of  shares  in which  the  Optionee  is at the time  vested  under  the
         surrendered  option  (or  surrendered  portion  thereof)  over  (b) the
         aggregate exercise price payable for such shares.

                                  (ii)  No  such  option   surrender   shall  be
         effective  unless  it is  approved  by the Plan  Administrator.  If the
         surrender is so approved,  then the  distribution to which the Optionee
         shall be entitled  may be made in shares of Common Stock valued at Fair
         Market Value on the option surrender date, in cash, or partly in shares
         and  partly  in  cash,  as the  Plan  Administrator  shall  in its sole
         discretion deem appropriate.

                                  (iii)  If  the   surrender  of  an  option  is
         rejected by the Plan  Administrator,  then the  Optionee  shall  retain
         whatever  rights  the  Optionee  had under the  surrendered  option (or
         surrendered  portion  thereof)  on the  option  surrender  date and may
         exercise  such  rights  at any time  prior to the later of (a) five (5)
         business days after the receipt of the rejection notice or (b) the last
         day on which the option is otherwise exercisable in accordance with the
         terms of the documents evidencing such option, but in no event may such
         rights be  exercised  more than ten (10) years  after the option  grant
         date.

                  C. The following  terms shall govern the grant and exercise of
limited stock appreciation rights:

                                 (i)  One or more  Section  16  Insiders  may be
         granted  limited  stock  appreciation  rights  with  respect  to  their
         outstanding options.

                                 (ii)   Upon  the   occurrence   of  a   Hostile
         Take-Over, each such individual holding one or more options with such a
         limited stock  appreciation  right shall have the  unconditional  right
         (exercisable  for a  thirty  (30)-day  period  following  such  Hostile
         Take-Over)  to surrender  each such option to the  Corporation,  to the
         extent  the  option is at the time  exercisable  for  vested  shares of
         Common Stock. In return for the surrendered  option, the Optionee shall
         receive a cash  distribution from the Corporation in an amount equal to
         the excess of (a) the  Take-Over  Price of the  shares of Common  Stock
         which  are at  the  time  vested  under  each  surrendered  option  (or
         surrendered  portion  thereof)  over (b) the aggregate  exercise  price
         payable for such shares.  Such cash  distribution  shall be paid within
         five (5) days following the option surrender date.

                                 (iii) The Plan Administrator shall pre-approve,
         at the time the limited right is granted,  the  subsequent  exercise of
         that right in accordance with the terms of the grant and the provisions
         of this  Section V. No  additional  approval of the Plan  Administrator
         shall be required at the time of the actual  option  surrender and cash
         distribution.

                                 (iv) The  balance  of the option (if any) shall
         continue  in full force and  effect in  accordance  with the  documents
         evidencing such option.

<PAGE>
                                  ARTICLE THREE

                     SALARY INVESTMENT OPTION GRANT PROGRAM

        I.        OPTION GRANTS

                  The  Primary  Committee  shall  have the  sole  and  exclusive
authority to determine  the calendar year or years (if any) for which the Salary
Investment  Option  Program  is to be in  effect  and to  select  the  Employees
eligible to participate in the Salary  Investment  Option Grant Program for such
calendar year or years.  Each selected Employee who elects to participate in the
Salary Investment Option Grant Program must, prior to the start of each calendar
year of  participation,  file with the Plan  Administrator (or its designate) an
irrevocable  authorization  directing the  Corporation to reduce his or her base
salary for that  calendar  year by a  designated  multiple of one percent  (1%).
However, the amount of such salary reduction must be not less than Five Thousand
Dollars  ($5,000.00)  and must not be more than the lesser of (i) twenty percent
(20%) of his or her rate of base  salary for the  calendar  year or (ii)  Twenty
Thousand  Dollars  ($20,000.00).  Each  individual  who  files a  proper  salary
reduction  authorization  shall  automatically  be granted an option  under this
Salary  Investment  Option Grant  Program on the first trading day in January of
the calendar year for which that salary reduction is to be in effect.

       II.        OPTION TERMS

                  Each option shall be a Non-Statutory  Option  evidenced by one
or more  documents  in the form  approved by the Plan  Administrator;  provided,
however, that each such document shall comply with the terms specified below.

                  A.       Exercise Price.

                           1. The exercise price per share shall be thirty-three
and  one-third  percent  (33-1/3%)  of the Fair Market Value per share of Common
Stock on the option grant date.

                           2. The exercise  price shall become  immediately  due
upon  exercise  of the  option  and  shall  be  payable  in one or  more  of the
alternative  forms  authorized  under the  Discretionary  Option Grant  Program.
Except to the extent the sale and remittance  procedure specified  thereunder is
utilized, payment of the exercise price for the purchased shares must be made on
the Exercise Date.

                  B.  Number of Option  Shares.  The  number of shares of Common
Stock  subject to the  option  shall be  determined  pursuant  to the  following
formula (rounded down to the nearest whole number):



                           X = A / (B x 66-2/3%), where

                           X is the number of option shares,

                           A is the dollar amount of the Optionee's  base salary
                           reduction for the calendar year, and

                           B is the Fair Market  Value per share of Common Stock
                           on the option grant date.
<PAGE>
                  C.  Exercise  and Term of  Options.  The option  shall  become
exercisable  in a series of twelve (12)  successive  equal monthly  installments
upon the Optionee's completion of each calendar month of Service in the calendar
year for which the salary  reduction  is in  effect.  Each  option  shall have a
maximum term of ten (10) years measured from the option grant date.

                  D. Effect of Termination of Service. Should the Optionee cease
Service for any reason  while  holding one or more  options  under this  Article
Three,  then each such option  shall remain  exercisable,  for any or all of the
shares  for which the option is  exercisable  at the time of such  cessation  of
Service,  until the earlier of (i) the  expiration of the ten  (10)-year  option
term or (ii) the expiration of the two (2)-year period measured from the date of
such  cessation of Service.  Should the  Optionee die while  holding one or more
options under this Article  Three,  then each such option may be exercised,  for
any or all of the shares for which the option is  exercisable at the time of the
Optionee's  cessation of Service (less any shares subsequently  purchased by the
Optionee  prior to death),  by the  personal  representative  of the  Optionee's
estate or by the person or persons to whom the option is transferred pursuant to
the Optionee's will or in accordance with the laws of descent and  distribution.
Such right of exercise  shall lapse,  and the option shall  terminate,  upon the
earlier of (i) the  expiration of the ten (10)-year  option term or (ii) the two
(2)-year period  measured from the date of the Optionee's  cessation of Service.
However, the option shall,  immediately upon the Optionee's cessation of Service
for any reason,  terminate and cease to remain  outstanding  with respect to any
and all  shares of Common  Stock for which the option is not  otherwise  at that
time exercisable.

      III.        CORPORATE TRANSACTION/CHANGE IN CONTROL

                  A.  In  the  event  of any  Corporate  Transaction  while  the
Optionee remains in Service, each outstanding option held by such Optionee under
this Salary  Investment Option Grant Program shall  automatically  accelerate so
that each such option  shall,  immediately  prior to the  effective  date of the
Corporate Transaction,  become fully exercisable for all of the shares of Common
Stock at the time subject to such option and may be exercised  for any or all of
those  shares as  fully-vested  shares of Common  Stock.  Each such  outstanding
option shall be assumed by the successor  corporation (or parent thereof) in the
Corporate  Transaction and shall remain exercisable for the fully-vested  shares
until  the  earlier  of (i) the  expiration  of the  option  term  or  (ii)  the
expiration  of the two  (2)-year  period  measured  from the date of  Optionee's
cessation of Service.

                  B. In the event of a Change  in  Control  while  the  Optionee
remains in Service,  each  outstanding  option held by such Optionee  under this
Salary  Investment Option Grant Program shall  automatically  accelerate so that
each such option  shall  immediately  become  fully  exercisable  for all of the
shares of Common  Stock at the time  subject to such option and may be exercised
for any or all of such shares as fully-vested shares of Common Stock. The option
shall  remain so  exercisable  until the  earlier of (i) the  expiration  of the
option term or (ii) the expiration of the two (2)-year  period measured from the
date of Optionee's cessation of Service.

                  C. The grant of  options  under the Salary  Investment  Option
Grant  Program  shall in no way affect the right of the  Corporation  to adjust,
reclassify,  reorganize or otherwise change its capital or business structure or
to merge, consolidate,  dissolve,  liquidate or sell or transfer all or any part
of its business or assets.
<PAGE>
      III.        REMAINING TERMS

                  The  remaining  terms of each option  granted under the Salary
Investment  Option  Grant  Program  shall be the same as the terms in effect for
option grants made under the Discretionary Option Grant Program.
<PAGE>
                                  ARTICLE FOUR

                             STOCK ISSUANCE PROGRAM


        I.        STOCK ISSUANCE TERMS

                  Shares of Common Stock may be issued under the Stock  Issuance
Program through direct and immediate  issuances  without any intervening  option
grants.  Each  such  stock  issuance  shall  be  evidenced  by a Stock  Issuance
Agreement which complies with the terms specified below.

                  A.       Purchase Price.

                           1. The purchase price per share shall be fixed by the
Plan  Administrator,  but shall not be less than the Fair Market Value per share
of Common Stock on the stock issuance date.

                           2. Subject to the  provisions of Section I of Article
Six shares of Common  Stock may be issued under the Stock  Issuance  Program for
any of the following items of  consideration  which the Plan  Administrator  may
deem appropriate in each individual instance:

                                  (i)  cash  or  check   made   payable  to  the
         Corporation, or

                                  (ii) past services rendered to the Corporation
         (or any Parent or Subsidiary).

                  B.       Vesting Provisions.

                           1.  Shares of  Common  Stock  issued  under the Stock
Issuance Program may, in the discretion of the Plan Administrator,  be fully and
immediately  vested upon issuance or may vest in one or more  installments  over
the Participant's period of Service or upon attainment of specified  performance
objectives.  The  elements of the vesting  schedule  applicable  to any unvested
shares of Common Stock issued under the Stock Issuance Program, namely:

                                  (i) the Service  period to be completed by the
         Participant or the performance objectives to be attained,

                                  (ii) the number of  installments  in which the
         shares are to vest,

                                  (iii) the interval or intervals (if any) which
         are to lapse between installments, and

                                  (iv)  the  effect   which   death,   Permanent
         Disability or other event  designated by the Plan  Administrator  is to
         have upon the vesting schedule,

shall be determined by the Plan  Administrator  and incorporated  into the Stock
Issuance Agreement.
<PAGE>
                           2. Any new,  substituted or additional  securities or
other  property  (including  money paid other than as a regular  cash  dividend)
which  the  Participant  may  have the  right to  receive  with  respect  to the
Participant's  unvested  shares of Common Stock by reason of any stock dividend,
stock  split,  recapitalization,  combination  of shares,  exchange of shares or
other change  affecting  the  outstanding  Common  Stock as a class  without the
Corporation's  receipt of consideration  shall be issued subject to (i) the same
vesting requirements  applicable to the Participant's  unvested shares of Common
Stock and (ii) such escrow  arrangements  as the Plan  Administrator  shall deem
appropriate.

                           3. The Participant shall have full stockholder rights
with respect to any shares of Common Stock issued to the  Participant  under the
Stock  Issuance  Program,  whether or not the  Participant's  interest  in those
shares is vested. Accordingly, the Participant shall have the right to vote such
shares and to receive any regular cash dividends paid on such shares.

                           4. Should the Participant  cease to remain in Service
while holding one or more unvested shares of Common Stock issued under the Stock
Issuance  Program or should the  performance  objectives  not be  attained  with
respect to one or more such unvested  shares of Common Stock,  then those shares
shall be immediately  surrendered to the Corporation for  cancellation,  and the
Participant  shall  have no further  stockholder  rights  with  respect to those
shares.  To the extent the  surrendered  shares  were  previously  issued to the
Participant for  consideration  paid in cash or cash  equivalent  (including the
Participant's purchase-money  indebtedness),  the Corporation shall repay to the
Participant the cash  consideration  paid for the  surrendered  shares and shall
cancel the unpaid principal  balance of any outstanding  purchase-money  note of
the Participant attributable to such surrendered shares.

                           5. The Plan Administrator may in its discretion waive
the surrender and  cancellation  of one or more unvested  shares of Common Stock
(or other assets  attributable  thereto)  which would  otherwise  occur upon the
cessation  of the  Participant's  Service or the  non-completion  of the vesting
schedule  applicable  to such shares.  Such waiver shall result in the immediate
vesting of the Participant's  interest in the shares of Common Stock as to which
the waiver applies.  Such waiver may be effected at any time,  whether before or
after the Participant's cessation of Service or the attainment or non-attainment
of the applicable performance objectives.

       II.        CORPORATE TRANSACTION/CHANGE IN CONTROL

                  A. All of the  outstanding  repurchase  rights under the Stock
Issuance  Program shall  terminate  automatically,  and all the shares of Common
Stock subject to those terminated  rights shall immediately vest in full, in the
event of any Corporate  Transaction,  except to the extent (i) those  repurchase
rights  are  assigned  to the  successor  corporation  (or  parent  thereof)  in
connection with such Corporate  Transaction or (ii) such accelerated  vesting is
precluded by other limitations imposed in the Stock Issuance Agreement.

                  B. Any  repurchase  rights that are assigned in the  Corporate
Transaction shall  automatically  terminate,  and all the shares of Common Stock
subject to those terminated  rights shall immediately vest in full, in the event
the  Participant's  Service  should  subsequently  terminate  by  reason  of  an
Involuntary Termination within eighteen (18) months following the effective date
of such Corporate Transaction.
<PAGE>
                  C. All of the  outstanding  repurchase  rights under the Stock
Issuance  Program shall  terminate  automatically,  and all the shares of Common
Stock subject to those terminated  rights shall immediately vest in full, in the
event the  Optionee's  service  should  terminate  by  reason of an  Involuntary
Termination within eighteen (18) months following the effective date of a Change
in Control.

      III.        SHARE ESCROW/LEGENDS

                  Unvested shares may, in the Plan  Administrator's  discretion,
be held in escrow by the Corporation  until the  Participant's  interest in such
shares  vests or may be issued  directly  to the  Participant  with  restrictive
legends on the certificates evidencing those unvested shares.
<PAGE>
                                  ARTICLE FIVE

                         AUTOMATIC OPTION GRANT PROGRAM


        I.        OPTION TERMS

                  A.  Grant  Dates.  Option  grants  shall be made on the  dates
specified below:

                           1. Each  Eligible  Director  who is first  elected or
appointed  as a  non-employee  Board  member  after  the  Effective  Date  shall
automatically be granted, on the date of such initial election or appointment, a
Non-Statutory Option to purchase 7,500 shares of Common Stock.

                           2. On the date of each Annual  Stockholders  Meeting,
beginning with the 1996 Annual  Meeting,  each  individual who is to continue to
serve as an Eligible  Director shall  automatically  be granted a  Non-Statutory
Option to purchase an  additional  1,250 shares of Common  Stock,  provided such
individual  has  served  as a  non-employee  Board  member  for at least six (6)
months.  There shall be no limit on the number of such 1,250-share option grants
any one Eligible Director may receive over his or her period of Board service.

                  B. Exercise Price.

                           1. The exercise price per share shall be equal to one
hundred percent (100%) of the Fair Market Value per share of Common Stock on the
option grant date.

                           2. The exercise price shall be payable in one or more
of the  alternative  forms  authorized  under  the  Discretionary  Option  Grant
Program.  Except  to the  extent  the sale and  remittance  procedure  specified
thereunder is utilized,  payment of the exercise price for the purchased  shares
must be made on the Exercise Date.

                  C.  Option  Term.  Each  option  shall have a term of ten (10)
years measured from the option grant date.

                  D.  Exercise  and  Vesting of Options.  Each  option  shall be
immediately exercisable for any or all of the option shares. However, any shares
purchased under the option shall be subject to repurchase by the Corporation, at
the  exercise  price  paid per share,  upon the  Optionee's  cessation  of Board
service prior to vesting in those shares. Each initial grant shall vest, and the
Corporation's  repurchase  right shall lapse,  in a series of four (4) equal and
successive  annual  installments over the Optionee's period of continued service
as a Board member,  with the first such  installment to vest upon the Optionee's
completion of one (1) year of Board service measured from the option grant date.
Each annual  grant  shall vest,  and the  Corporation's  repurchase  right shall
lapse, upon the Optionee's  completion of one (1) year of Board service measured
from the option grant date.

                  E.  Effect of  Termination  of Board  Service.  The  following
provisions  shall govern the exercise of any options held by the Optionee at the
time the Optionee ceases to serve as a Board member:
<PAGE>
                                  (i)  Should the  Optionee  cease to serve as a
         Board member for any reason (other than death or Permanent Disability),
         then the Optionee shall have a six (6)-month  period following the date
         of such  cessation  of Board  service  in which to  exercise  each such
         option.

                                  (ii) Should the  Optionee die while the option
         is  outstanding,  then the personal  representative  of the  Optionee's
         estate  or the  person or  persons  to whom the  option is  transferred
         pursuant  to the  Optionee's  will or in  accordance  with  the laws of
         descent  and  distribution  shall  have a  twelve  (12)-  month  period
         following  the date of the  Optionee's  cessation  of Board  service in
         which to exercise each such option.

                                  (iii) During the limited post-service exercise
         period,  the option may not be exercised in the aggregate for more than
         the number of vested shares for which the option is  exercisable at the
         time of the Optionee's cessation of Board service.

                                  (iv) Should the  Optionee  cease to serve as a
         Board  member  by  reason of death or  Permanent  Disability,  then all
         shares at the time subject to the option shall immediately vest so that
         such option may, during the twelve (12)-month exercise period following
         the Optionee's death or Permanent  Disability,  be exercised for all or
         any portion of such shares as fully-vested shares of Common Stock.

                                  (v)  In  no  event  shall  the  option  remain
         exercisable   after  the  expiration  of  the  option  term.  Upon  the
         expiration of the limited post-service  exercise period or (if earlier)
         upon the expiration of the option term, the option shall  terminate and
         cease to be outstanding  for any vested shares for which the option has
         not been exercised.  However,  the option shall,  immediately  upon the
         Optionee's  cessation  of  Board  service,  terminate  and  cease to be
         outstanding to the extent it is not otherwise at that time  exercisable
         for vested shares.

       II.        CORPORATE TRANSACTION/CHANGE IN CONTROL/HOSTILE TAKE-
                  OVER

                  A. In the event of any  Corporate  Transaction,  the shares of
Common Stock at the time subject to each  outstanding  option but not  otherwise
vested  shall  automatically  vest  in  full so that  each  such  option  shall,
immediately  prior to the effective  date of the Corporate  Transaction,  become
fully  exercisable  for all of the shares of Common Stock at the time subject to
such  option  and may be  exercised  for all or any  portion  of such  shares as
fully-vested shares of Common Stock.  Immediately  following the consummation of
the Corporate Transaction, each automatic option grant shall terminate and cease
to be outstanding, except to the extent assumed by the successor corporation (or
parent thereof).

                  B. In  connection  with any Change in  Control,  the shares of
Common Stock at the time subject to each  outstanding  option but not  otherwise
vested  shall  automatically  vest  in  full so that  each  such  option  shall,
immediately  prior to the effective date of the Change in Control,  become fully
exercisable  for all of the shares of Common  Stock at the time  subject to such
<PAGE>
option  and  may  be  exercised  for  all or  any  portion  of  such  shares  as
fully-vested  shares of Common Stock. Each such option shall remain  exercisable
for such fully-vested  option shares until the expiration or sooner  termination
of the option term or the surrender of the option in  connection  with a Hostile
Take-Over.

                  C. Upon the  occurrence of a Hostile  Take-Over,  the Optionee
shall have a thirty  (30)-day  period in which to surrender  to the  Corporation
each  automatic  option  held by him or her.  The  Optionee  shall in  return be
entitled to a cash  distribution  from the Corporation in an amount equal to the
excess of (i) the  Take-Over  Price of the  shares  of Common  Stock at the time
subject to the  surrendered  option (whether or not the Optionee is otherwise at
the time vested in those shares) over (ii) the aggregate  exercise price payable
for such  shares.  Such cash  distribution  shall be paid  within  five (5) days
following the surrender of the option to the Corporation.  Stockholder  approval
of the  amendments  to the  Plan at the 1998  Annual  Meeting  shall  constitute
preapproval  of the  grant  of each  such  option  surrender  right  under  this
Automatic  Option  Grant  Program and the  subsequent  exercise of that right in
accordance  with the terms and  provisions  of this Section  II.C. No additional
approval or consent of the Plan  Administrator  shall be required at the time of
the actual option surrender and cash distribution.

                  D. Each option which is assumed in connection with a Corporate
Transaction  shall be appropriately  adjusted,  immediately after such Corporate
Transaction,  to apply to the number and class of  securities  which  would have
been issuable to the Optionee in consummation of such Corporate  Transaction had
the option  been  exercised  immediately  prior to such  Corporate  Transaction.
Appropriate  adjustments  shall also be made to the exercise  price  payable per
share under each  outstanding  option,  provided the  aggregate  exercise  price
payable for such securities shall remain the same.

                  E. The grant of  options  under  the  Automatic  Option  Grant
Program  shall  in no way  affect  the  right  of  the  Corporation  to  adjust,
reclassify,  reorganize or otherwise change its capital or business structure or
to merge, consolidate,  dissolve,  liquidate or sell or transfer all or any part
of its business or assets.

      III.        REMAINING TERMS

                  The remaining terms of each option granted under the Automatic
Option Grant  Program shall be the same as the terms in effect for option grants
made under the Discretionary Option Grant Program.
<PAGE>
                                   ARTICLE SIX

                                  MISCELLANEOUS


        I.        FINANCING

                  A.  The  Plan   Administrator   may  permit  any  Optionee  or
Participant  to pay the option  exercise  price under the  Discretionary  Option
Grant Program or the purchase  price for shares issued under the Stock  Issuance
Program by delivering a promissory note payable in one or more installments. The
terms of any such  promissory note (including the interest rate and the terms of
repayment)  shall  be  established  by  the  Plan   Administrator  in  its  sole
discretion.  Promissory  notes may be  authorized  with or without  security  or
collateral.  In no event may the maximum  credit  available  to the  Optionee or
Participant  exceed  the sum of (i)  the  aggregate  option  exercise  price  or
purchase price payable for the purchased shares plus (ii) any Federal, state and
local  income and  employment  tax  liability  incurred  by the  Optionee or the
Participant in connection with the option exercise or share purchase.

                  B. The Plan  Administrator  may, in its discretion,  determine
that one or more such  promissory  notes shall be subject to  forgiveness by the
Corporation  in whole or in part upon such terms as the Plan  Administrator  may
deem appropriate.

       II.        TAX WITHHOLDING

                  A. The  Corporation's  obligation to deliver  shares of Common
Stock upon the  exercise  of options  or stock  appreciation  rights or upon the
issuance  or  vesting  of such  shares  under the Plan  shall be  subject to the
satisfaction  of all applicable  Federal,  state and local income and employment
tax withholding requirements.

                  B. The Plan Administrator may, in its discretion,  provide any
or all holders of Non-Statutory Options or unvested shares of Common Stock under
the Plan  (other  than the  options  granted  or the  shares  issued  under  the
Automatic  Option Grant Program) with the right to use shares of Common Stock in
satisfaction  of all or part of the Taxes incurred by such holders in connection
with the exercise of their  options or the vesting of their  shares.  Such right
may be provided to any such holder in either or both of the following formats:

                                  (i) Stock  Withholding:  The  election to have
         the  Corporation  withhold,  from the shares of Common Stock  otherwise
         issuable upon the exercise of such Non-Statutory  Option or the vesting
         of such shares, a portion of those shares with an aggregate Fair Market
         Value equal to the  percentage  of the Taxes (not to exceed one hundred
         percent (100%)) designated by the holder.

                                  (ii) Stock  Delivery:  The election to deliver
         to the Corporation,  at the time the Non-Statutory  Option is exercised
         or the  shares  vest,  one or more  shares of Common  Stock  previously
         acquired  by such  holder  (other  than in  connection  with the option
         exercise or share vesting  triggering the Taxes) with an aggregate Fair
         Market  Value equal to the  percentage  of the Taxes (not to exceed one
         hundred percent (100%)) designated by the holder.
<PAGE>
      III.        EFFECTIVE DATE AND TERM OF PLAN

                  A. The Plan was  adopted by the Board on May 25,  1995 and was
subsequently  approved  by  the  Corporation's  stockholders.  The  Plan  became
effective on the Effective Date.

                  B. On  November  14,  1997  the  Board  adopted  a  series  of
amendments  to the Plan which (i) increased the number of shares of Common Stock
reserved for issuance over the term of the Plan by an additional 600,000 shares,
(ii) rendered all  non-employee  Board members eligible to receive option grants
and  direct  stock  issuances  under the  Discretionary  Option  Grant and Stock
Issuance  Programs,  (iii)  allowed  unvested  shares  issued under the Plan and
subsequently  repurchased  by the  Corporation  at the option  exercise price or
direct  issue price paid per share to be reissued  under the Plan,  (iv) removed
certain  restrictions on the eligibility of non-employee  Board members to serve
as Plan  Administrator,  and (v) effected a series of additional  changes to the
provisions of the Plan  (including the  stockholder  approval  requirements)  in
order to take  advantage  of the 1996  amendments  to Rule 16b-3 of the 1934 Act
which exempts certain officer and director  transactions under the Plan from the
short-swing  liability provisions of the federal securities laws. The amendments
listed above are subject to stockholder  approval at the 1998 Annual Meeting. In
addition  to such  amendments,  the  Board,  without  the need  for  stockholder
approval,  amended the Plan to (i) allow the Board or the Primary  Committee  to
administer   the  Plan  with  respect  to  Section  16   Insiders,   (ii)  allow
Non-Statutory  Options  to be  transferred  in limited  circumstances  and (iii)
eliminate the six (6)-month holding  requirement for limited stock  appreciation
rights. Should the required stockholder approval of the November 1997 amendments
not be obtained, then the amendments to the Plan which required such stockholder
approval shall have no force and effect and any options  granted on the basis of
the  600,000-share  increase  shall  terminate  and cease to remain  outstanding
without ever becoming exercisable for those shares, and no further option grants
shall be made on the basis of such  increase.  The  provisions of the Plan as in
effect immediately prior to the November 1997 amendments  requiring  shareholder
approval  shall  automatically  be  reinstated,  and  option  grants  and  share
issuances  may  thereafter  continue  to be  made  pursuant  to  the  reinstated
provisions of the Plan.

                  C. The Plan shall serve as the  successor  to the  Predecessor
Plan,  and no further  option  grants shall be made under the  Predecessor  Plan
after the Effective Date. All options  outstanding under the Predecessor Plan on
such date shall,  immediately  upon  approval of the Plan by the  Corporations's
stockholders,  be incorporated into the Plan and treated as outstanding  options
under the Plan. However,  each outstanding option so incorporated shall continue
to be governed solely by the terms of the documents  evidencing such option, and
no  provision  of the Plan  shall be deemed to affect or  otherwise  modify  the
rights or obligations of the holders of such  incorporated  options with respect
to their acquisition of shares of Common Stock.

                  D. One or more  provisions  of the  Plan,  including  (without
limitation) the option/vesting acceleration provisions of Article Two applicable
to   Corporate   Transactions   and  Changes  in  Control,   may,  in  the  Plan
Administrator's discretion, be extended to one or more options incorporated from
the Predecessor Plan which do not otherwise contain such provisions.
<PAGE>
                  E. The Plan shall terminate upon the earliest of (i) April 30,
2005,  (ii) the date on which all shares  available for issuance  under the Plan
shall have been issued  pursuant to the  exercise of the options or the issuance
of shares  (whether  vested or unvested) under the Plan or (iii) the termination
of all outstanding  options in connection with a Corporate  Transaction.  Upon a
clause (i) termination,  all options and unvested stock issuances outstanding on
such date shall thereafter  continue to have force and effect in accordance with
the provisions of the documents evidencing such options or issuances.

       IV.        AMENDMENT OF THE PLAN

                  A. The Board  shall  have  complete  and  exclusive  power and
authority to amend or modify the Plan in any or all respects.  However,  no such
amendment or modification shall adversely affect the rights and obligations with
respect to options, stock appreciation rights or unvested stock issuances at the
time outstanding under the Plan unless the Optionee or the Participant  consents
to such amendment or modification.  In addition,  certain amendments may require
stockholder approval pursuant to applicable laws and regulations.

                  B.  Options to purchase  shares of Common Stock may be granted
under the Discretionary Option Grant and Salary Investment Option Grant Programs
and shares of Common Stock may be issued under the Stock  Issuance  Program that
are in each  instance  in excess of the  number of  shares  then  available  for
issuance under the Plan,  provided any excess shares actually issued under those
programs are held in escrow until there is obtained  stockholder  approval of an
amendment sufficiently increasing the number of shares of Common Stock available
for issuance under the Plan. If such stockholder approval is not obtained within
twelve (12) months after the date the first such excess issuances are made, then
(i) any  unexercised  options  granted on the basis of such excess  shares shall
terminate and cease to be outstanding  and (ii) the  Corporation  shall promptly
refund to the Optionees and the Participants the exercise or purchase price paid
for any excess  shares  issued under the Plan and held in escrow,  together with
interest (at the  applicable  Short Term Federal Rate) for the period the shares
were held in escrow, and such shares shall thereupon be automatically  cancelled
and cease to be outstanding.

        V.        USE OF PROCEEDS

                  Any cash proceeds received by the Corporation from the sale of
shares  of  Common  Stock  under the Plan  shall be used for  general  corporate
purposes.

       VI.        REGULATORY APPROVALS

                  A. The  implementation of the Plan, the granting of any option
or stock  appreciation  right  under the Plan and the  issuance of any shares of
Common Stock (i) upon the exercise of any option or stock  appreciation right or
(ii) under the Stock  Issuance  Program  shall be  subject to the  Corporation's
procurement  of all  approvals and permits  required by  regulatory  authorities
having  jurisdiction  over the Plan, the options and stock  appreciation  rights
granted under it and the shares of Common Stock issued pursuant to it.

                  B. No shares of Common  Stock or other  assets shall be issued
or  delivered  under the Plan unless and until there shall have been  compliance
with all applicable requirements of Federal and state securities laws, including
the filing and  effectiveness  of the Form S-8  registration  statement  for the
shares of Common  Stock  issuable  under the Plan,  and all  applicable  listing
requirements  of  any  stock  exchange  (or  the  Nasdaq  National  Market,   if
applicable) on which Common Stock is then listed for trading.
<PAGE>
      VII.        NO EMPLOYMENT/SERVICE RIGHTS

                  Nothing  in the Plan shall  confer  upon the  Optionee  or the
Participant any right to continue in Service for any period of specific duration
or interfere with or otherwise restrict in any way the rights of the Corporation
(or any Parent or  Subsidiary  employing  or  retaining  such  person) or of the
Optionee or the Participant, which rights are hereby expressly reserved by each,
to terminate such person's  Service at any time for any reason,  with or without
cause.
<PAGE>
                                    APPENDIX


                  The following definitions shall be in effect under the Plan:

         A. Automatic Option Grant Program shall mean the automatic option grant
program in effect under the Plan.

         B. Board shall mean the Corporation's Board of Directors.

         C. Change in Control shall mean a change in ownership or control of the
Corporation effected through either of the following transactions:

                         (i) the  acquisition,  directly or  indirectly,  by any
         person or related  group of persons  (other than the  Corporation  or a
         person that directly or indirectly  controls,  is controlled  by, or is
         under common control with, the  Corporation),  of beneficial  ownership
         (within  the  meaning  of Rule  13d-3  of the 1934  Act) of  securities
         possessing  more than fifty percent (50%) of the total combined  voting
         power of the Corporation's  outstanding securities pursuant to a tender
         or exchange offer made directly to the Corporation's stockholders which
         the Board does not recommend such stockholders to accept, or

                        (ii) a change in the  composition  of the  Board  over a
         period  of  thirty-six  (36)  consecutive  months  or less  such that a
         majority  of the  Board  members  ceases,  by  reason  of  one or  more
         contested   elections  for  Board   membership,   to  be  comprised  of
         individuals who either (A) have been Board members  continuously  since
         the  beginning of such period or (B) have been elected or nominated for
         election as Board members  during such period by at least a majority of
         the Board  members  described in clause (A) who were still in office at
         the time the Board approved such election or nomination.

         D. Code shall mean the Internal Revenue Code of 1986, as amended.

         E. Common Stock shall mean the Corporation's common stock.

         F. Corporate  Transaction  shall  mean  either  of the  following
            stockholder-approved  transactions to which the Corporation is
            a party:

                         (i) a  merger  or  consolidation  in  which  securities
         possessing  more than fifty percent (50%) of the total combined  voting
         power of the Corporation's  outstanding securities are transferred to a
         person or persons  different from the persons holding those immediately
         prior to such transaction; or

                        (ii) the sale,  transfer or other  disposition of all or
         substantially all of the Corporation's  assets in complete  liquidation
         or dissolution of the Corporation.

         G.  Corporation shall mean Exogen, Inc., a Delaware corporation.

         H.  Discretionary  Option Grant  Program  shall mean the  discretionary
option grant program in effect under the Plan.

         I.  Effective  Date  shall  mean  the date on  which  the  Underwriting
Agreement is executed and the initial public  offering price of the Common Stock
is established.
<PAGE>
         J. Eligible Director shall mean a non-employee Board member eligible to
participate  in the  Automatic  Option  Grant  Program  in  accordance  with the
eligibility provisions of Article One.

         K.  Employee  shall  mean an  individual  who is in the  employ  of the
Corporation (or any Parent or Subsidiary),  subject to the control and direction
of the employer  entity as to both the work to be  performed  and the manner and
method of performance.

         L.  Exercise  Date shall mean the date on which the  Corporation  shall
have received written notice of the option exercise.

         M. Fair Market  Value per share of Common  Stock on any  relevant  date
shall be determined in accordance with the following provisions:

                         (i) If the  Common  Stock is at the time  traded on the
         Nasdaq National Market, then the Fair Market Value shall be the closing
         selling  price per share of Common  Stock on the date in  question,  as
         such  price is  reported  by the  National  Association  of  Securities
         Dealers on the Nasdaq National Market or any successor system. If there
         is no  closing  selling  price  for the  Common  Stock  on the  date in
         question, then the Fair Market Value shall be the closing selling price
         on the last preceding date for which such quotation exists.

                        (ii) If the  Common  Stock is at the time  listed on any
         Stock Exchange, then the Fair Market Value shall be the closing selling
         price per share of Common  Stock on the date in  question  on the Stock
         Exchange  determined by the Plan Administrator to be the primary market
         for the  Common  Stock,  as such  price  is  officially  quoted  in the
         composite tape of transactions on such exchange. If there is no closing
         selling  price for the Common Stock on the date in  question,  then the
         Fair  Market  Value  shall  be the  closing  selling  price on the last
         preceding date for which such quotation exists.

                       (iii) For purposes of option grants made on the Effective
         Date,  the Fair Market Value shall be deemed to be equal to the initial
         public offering price per share at which the Common Stock is to be sold
         pursuant to the Underwriting Agreement.

         N.  Hostile   Take-Over  shall  mean  the   acquisition,   directly  or
indirectly,  by  any  person  or  related  group  of  persons  (other  than  the
Corporation or a person that directly or indirectly controls,  is controlled by,
or is under common  control  with,  the  Corporation)  of  beneficial  ownership
(within the meaning of Rule 13d-3 of the 1934 Act) of securities possessing more
than fifty percent (50%) of the total combined voting power of the Corporation's
outstanding  securities  pursuant to a tender or exchange offer made directly to
the  Corporation's   stockholders  which  the  Board  does  not  recommend  such
stockholders to accept.

         O.  Incentive   Option  shall  mean  an  option  which   satisfies  the
requirements of Code Section 422.

         P. Involuntary Termination shall mean the termination of the Service of
any individual which occurs by reason of:
<PAGE>
                         (i)  such   individual's   involuntary   dismissal   or
         discharge by the Corporation for reasons other than Misconduct, or

                         (ii) such individual's  voluntary resignation following
         (A) a  change  in  his or  her  position  with  the  Corporation  which
         materially reduces his or her level of responsibility,  (B) a reduction
         in his or her level of  compensation  (including  base  salary,  fringe
         benefits  and  participation  in  corporate-performance  based bonus or
         incentive  programs)  by  more  than  fifteen  percent  (15%)  or (C) a
         relocation of such individual's  place of employment by more than fifty
         (50) miles,  provided and only if such change,  reduction or relocation
         is effected by the Corporation without the individual's consent.

         Q.  Misconduct   shall  mean  the  commission  of  any  act  of  fraud,
embezzlement or dishonesty by the Optionee or Participant,  any unauthorized use
or disclosure by such person of confidential information or trade secrets of the
Corporation (or any Parent or Subsidiary),  or any other intentional  misconduct
by such person  adversely  affecting the business or affairs of the  Corporation
(or any Parent or Subsidiary)  in a material  manner.  The foregoing  definition
shall not be  deemed  to be  inclusive  of all the acts or  omissions  which the
Corporation  (or any Parent or  Subsidiary)  may  consider  as  grounds  for the
dismissal  or  discharge  of any  Optionee,  Participant  or other person in the
Service of the Corporation (or any Parent or Subsidiary).

         R. 1934 Act shall mean the Securities Exchange Act of 1934, as amended.

         S.  Non-Statutory  Option  shall mean an option not intended to satisfy
the requirements of Code Section 422.

         T.  Optionee  shall mean any person to whom an option is granted  under
the  Discretionary  Option Grant,  Automatic  Option Grant or Salary  Investment
Option Grant Program.

         U. Parent shall mean any corporation (other than the Corporation) in an
unbroken  chain of  corporations  ending  with the  Corporation,  provided  each
corporation in the unbroken chain (other than the Corporation) owns, at the time
of the determination,  stock possessing fifty percent (50%) or more of the total
combined  voting power of all classes of stock in one of the other  corporations
in such chain.

         V.  Participant  shall mean any  person who is issued  shares of Common
Stock under the Stock Issuance Program.

         W.  Permanent   Disability  or  Permanently  Disabled  shall  mean  the
inability  of the  Optionee  or the  Participant  to engage  in any  substantial
gainful  activity  by reason of any  medically  determinable  physical or mental
impairment expected to result in death or to be of continuous duration of twelve
(12) months or more.  However,  solely for the purposes of the Automatic  Option
Grant  Program,  Permanent  Disability or  Permanently  Disabled  shall mean the
inability of the non-employee Board member to perform his or her usual duties as
a Board  member by  reason  of any  medically  determinable  physical  or mental
impairment expected to result in death or to be of continuous duration of twelve
(12) months or more.

         X. Plan shall mean the Corporation's 1995 Stock  Option/Stock  Issuance
Plan, as set forth in this document.
<PAGE>
         Y. Plan  Administrator  shall mean the particular  entity,  whether the
Primary Committee, the Board or the Secondary Committee,  which is authorized to
administer the  Discretionary  Option Grant,  Salary Investment Option Grant and
Stock Issuance Programs with respect to one or more classes of eligible persons,
to the extent such entity is carrying  out its  administrative  functions  under
those programs with respect to the persons under its jurisdiction.

         Z.  Predecessor Plan shall mean the  Corporation's  existing 1993 Stock
Option Plan.

         AA.  Primary  Committee  shall  mean the  committee  of two (2) or more
non-employee   Board  members   appointed  by  the  Board  to   administer   the
Discretionary  Option Grant,  Salary  Investment Option Grant and Stock Issuance
Programs with respect to Section 16 Insiders.

         AB.  Salary  Investment  Option  Grant  Program  shall  mean the salary
investment option grant program in effect under the Plan.

         AC. Secondary Committee shall mean a committee of two (2) or more Board
members  appointed by the Board to administer  the  Discretionary  Option Grant,
Salary  Investment  Option  Grant and Stock  Issuance  Programs  with respect to
eligible persons other than Section 16 Insiders.

         AD.  Section 16  Insider  shall  mean an  officer  or  director  of the
Corporation  subject to the short-swing  profit liabilities of Section 16 of the
1934 Act.

         AE. Section 12(g)  Registration Date shall mean the first date on which
the Common Stock is registered under Section 12(g) of the 1934 Act.

         AF. Service shall mean the provision of services to the Corporation (or
any  Parent  or  Subsidiary)  by a person  in the  capacity  of an  Employee,  a
non-employee  member of the board of directors or a  consultant  or  independent
advisor,  except to the extent otherwise  specifically provided in the documents
evidencing the option grant or stock issuance.

         AG. Stock Exchange shall mean either the American Stock Exchange or the
New York Stock Exchange.

         AH. Stock Issuance  Agreement shall mean the agreement  entered into by
the  Corporation and the Participant at the time of issuance of shares of Common
Stock under the Stock Issuance Program.

         AI. Stock  Issuance  Program shall mean the stock  issuance  program in
effect under the Plan.

         AJ. Subsidiary shall mean any corporation  (other than the Corporation)
in an unbroken chain of corporations  beginning with the  Corporation,  provided
each corporation  (other than the last  corporation) in the unbroken chain owns,
at the time of the  determination,  stock possessing fifty percent (50%) or more
of the total  combined  voting power of all classes of stock in one of the other
corporations in such chain.

         AK. Take-Over Price shall mean the greater of (i) the Fair Market Value
per  share  of  Common  Stock  on the  date the  option  is  surrendered  to the
Corporation in connection with a Hostile  Take-Over or (ii) the highest reported
price per share of Common  Stock paid by the tender  offeror in  effecting  such
Hostile  Take-Over.  However,  if the surrendered option is an Incentive Option,
the Take-Over Price shall not exceed the clause (i) price per share.
<PAGE>
         AL. Taxes shall mean the Federal, state and local income and employment
tax  liabilities  incurred  by the holder of  Non-Statutory  Options or unvested
shares of Common Stock in connection with the exercise of such holder's  options
or the vesting of his or her shares.

         AM. 10% Stockholder  shall mean the owner of stock (as determined under
Code  Section  424(d))  possessing  more  than ten  percent  (10%) of the  total
combined  voting power of all classes of stock of the Corporation (or any Parent
or Subsidiary).

         AN.  Underwriting  Agreement  shall  mean  the  agreement  between  the
Corporation  and the  underwriter  or  underwriters  managing the initial public
offering of the Common Stock.

                                                                   EXHIBIT 10.21

                                  EXOGEN, INC.
                          EMPLOYEE STOCK PURCHASE PLAN
                          ----------------------------

                     (As Amended through November 14, 1997)


       I.         PURPOSE OF THE PLAN

                  This Employee  Stock  Purchase Plan is intended to promote the
interests of Exogen,  Inc. by providing  eligible employees with the opportunity
to acquire a proprietary interest in the Corporation through  participation in a
payroll-deduction  based  employee stock purchase plan designed to qualify under
Section  423 of the Code.  Capitalized  terms  herein  shall  have the  meanings
assigned to such terms in the attached Appendix.

      II.         ADMINISTRATION OF THE PLAN

                  The Plan Administrator  shall have full authority to interpret
and construe any  provision of the Plan and to adopt such rules and  regulations
for  administering the Plan as it may deem necessary in order to comply with the
requirements of Code Section 423. Decisions of the Plan  Administrator  shall be
final and binding on all parties having an interest in the Plan.

     III.         STOCK SUBJECT TO PLAN

                  A. The stock  purchasable  under  the Plan  shall be shares of
authorized but unissued or reacquired  Common Stock,  including shares of Common
Stock purchased on the open market. The maximum number of shares of Common Stock
which may be issued over the term of the Plan shall not exceed  350,000  shares.
Such authorized  share reserve reflects the 1-for-2 reverse stock split effected
prior to the  Effective  Date and  includes (i) the  original  share  reserve of
150,000  shares  established  for the Plan and (ii) the  200,000-share  increase
adopted  by  the  Board  on  November  14,  1997,  subject  to  approval  by the
Corporation's stockholders at the 1998 Annual Meeting.

                  B. Should any change be made to the Common  Stock by reason of
any stock  split,  stock  dividend,  recapitalization,  combination  of  shares,
exchange of shares or other change  affecting the outstanding  Common Stock as a
class  without  the   Corporation's   receipt  of   consideration,   appropriate
adjustments  shall be made to (i) the  maximum  number  and class of  securities
issuable  under the  Plan,  (ii) the  maximum  number  and  class of  securities
purchasable  per  Participant  on any one Purchase Date and (iii) the number and
class of  securities  and the price per share in effect  under each  outstanding
purchase  right in order to prevent  the  dilution  or  enlargement  of benefits
thereunder.

      IV.         OFFERING PERIODS

                  A. Shares of Common Stock shall be offered for purchase  under
the Plan through a series of successive  offering periods until such time as (i)
the maximum  number of shares of Common Stock  available for issuance  under the
Plan  shall  have  been  purchased  or (ii)  the Plan  shall  have  been  sooner
terminated.
<PAGE>
                  B. Each  offering  period  shall be of such  duration  (not to
exceed twenty-four (24) months) as determined by the Plan Administrator prior to
the start date.  However,  the initial  offering  period  shall  commence at the
Effective  Time and  terminate on the last  business day in July 1997.  The next
offering  period shall  commence on the first  business day in August 1997,  and
subsequent   offering   periods  shall   commence  as  designated  by  the  Plan
Administrator.

                  C. Each offering  period shall be comprised of a series of one
or more successive  Purchase Periods.  Purchase Periods shall begin on the first
business day in February and August each year and terminate on the last business
day in July and January respectively each year.

       V.         ELIGIBILITY

                  A. Each  individual  who is an Eligible  Employee on the start
date of the initial  offering  period  shall be eligible to enter that  offering
period or any subsequent offering period under the Plan on the start date of any
Purchase Period within the applicable offering period on which he or she remains
an Eligible Employee.

                  B. Each  individual  who first  becomes an  Eligible  Employee
after the start date of the initial  offering  period shall be eligible to enter
that offering  period or any  subsequent  offering  period under the Plan on the
start date of any Purchase Period within the applicable offering period on which
he or she is an Eligible Employee with at least three (3) months of service with
the Corporation or any Corporate Affiliate.

                  C. The date an individual  enters an offering  period shall be
designated his or her Entry Date for purposes of that offering period.

                  D.  To  participate  in the  Plan  for a  particular  offering
period,  the Eligible  Employee must complete the enrollment forms prescribed by
the Plan  Administrator  (including  a stock  purchase  agreement  and a payroll
deduction  authorization  form) and file such forms with the Plan  Administrator
(or its designate) on or before his or her scheduled Entry Date.

      VI.         PAYROLL DEDUCTIONS

                  A. The payroll  deduction  authorized by the  Participant  for
purposes of acquiring  shares of Common Stock under the Plan may be any multiple
of one percent (1%) of the Cash Compensation paid to the Participant during each
Purchase  Period  within that  offering  period,  up to a maximum of ten percent
(10%).  The  deduction  rate so  authorized  shall  continue  in effect  for the
remainder of the offering  period,  except to the extent such rate is changed in
accordance with the following guidelines:

                                  (i) The  Participant  may,  at any time during
         the  offering  period,  reduce his or her rate of payroll  deduction to
         become  effective as soon as possible after filing the appropriate form
         with the Plan Administrator.  The Participant may not, however,  effect
         more than one (1) such reduction per Purchase Period.

                                  (ii)  The   Participant   may,  prior  to  the
         commencement  of any new Purchase  Period  within the offering  period,
         increase  the  rate  of his or her  payroll  deduction  by  filing  the
         appropriate form with the Plan  Administrator.  The new rate (which may
<PAGE>
         not exceed the ten percent (10%) maximum) shall become  effective as of
         the start  date of the  Purchase  Period  following  the filing of such
         form.

                  B.  Payroll  deductions  shall  begin  on the  first  pay  day
following  the  Participant's  Entry  Date into the  offering  period  and shall
(unless  sooner  terminated  by the  Participant)  continue  through the pay day
ending with or immediately  prior to the last day of that offering  period.  The
amounts so collected shall be credited to the  Participant's  book account under
the  Plan,  but no  interest  shall  be paid on the  balance  from  time to time
outstanding in such account.  The amounts  collected from the Participant  shall
not be held in any segregated  account or trust fund and may be commingled  with
the general assets of the Corporation and used for general corporate purposes.

                  C.  Payroll  deductions  shall  automatically  cease  upon the
termination  of  the  Participant's   purchase  right  in  accordance  with  the
provisions of the Plan.

                  D. The  Participant's  acquisition  of Common  Stock under the
Plan on any  Purchase  Date shall  neither  limit nor require the  Participant's
acquisition of Common Stock on any subsequent  Purchase Date, whether within the
same or a different offering period.

      VII.        PURCHASE RIGHTS

                  A. Grant of Purchase  Right. A Participant  shall be granted a
separate   purchase  right  for  each  offering   period  in  which  he  or  she
participates.  The purchase  right shall be granted on the  Participant's  Entry
Date into the offering period and shall provide the  Participant  with the right
to purchase shares of Common Stock, in a series of successive  installments over
the  remainder of such  offering  period,  upon the terms set forth  below.  The
Participant  shall execute a stock purchase  agreement  embodying such terms and
such other provisions (not inconsistent with the Plan) as the Plan Administrator
may deem advisable.

                  Under no circumstances  shall purchase rights be granted under
the Plan to any Eligible  Employee if such individual  would,  immediately after
the grant,  own (within the meaning of Code Section 424(d)) or hold  outstanding
options or other rights to purchase,  stock possessing five percent (5%) or more
of the  total  combined  voting  power or value of all  classes  of stock of the
Corporation or any Corporate Affiliate.

                  B. Exercise of the Purchase  Right.  Each purchase right shall
be  automatically  exercised in installments  on each  successive  Purchase Date
within the  offering  period,  and shares of Common Stock shall  accordingly  be
purchased  on behalf  of each  Participant  (other  than any  Participant  whose
payroll  deductions  have  previously  been  refunded  in  accordance  with  the
Termination of Purchase Right provisions  below) on each such Purchase Date. The
purchase shall be effected by applying the Participant's  payroll deductions for
the Purchase Period ending on such Purchase Date to the purchase of whole shares
of Common Stock at the  purchase  price in effect for the  Participant  for that
Purchase Date.

                  C.  Purchase  Price.  The  purchase  price  per share at which
Common Stock will be purchased on the Participant's behalf on each Purchase Date
within the offering  period shall be equal to  eighty-five  percent (85%) of the
lower  of  (i)  the  Fair  Market  Value  per  share  of  Common  Stock  on  the
<PAGE>
Participant's Entry Date into that offering period or (ii) the Fair Market Value
per share of Common Stock on that Purchase Date.  However,  for each Participant
whose Entry Date is other than the start date of the offering period, the clause
(i)  amount  shall in no event be less than the Fair  Market  Value per share of
Common Stock on the start date of that offering period.

                  D.  Number  of  Purchasable  Shares.  The  number of shares of
Common Stock  purchasable  by a  Participant  on each  Purchase  Date during the
offering  period  shall be the number of whole  shares  obtained by dividing the
amount  collected from the  Participant  through payroll  deductions  during the
Purchase  Period ending with that Purchase Date by the purchase  price in effect
for the  Participant  for that Purchase  Date.  However,  the maximum  number of
shares of Common Stock  purchasable  per  Participant  on any one Purchase  Date
shall not exceed 2,500 shares,  subject to periodic  adjustments in the event of
certain changes in the Corporation's capitalization.

                  E.  Excess  Payroll  Deductions.  Any payroll  deductions  not
applied to the purchase of shares of Common  Stock on any Purchase  Date because
they are not  sufficient to purchase a whole share of Common Stock shall be held
for the purchase of Common Stock on the next Purchase Date. However, any payroll
deductions  not  applied  to the  purchase  of  Common  Stock by  reason  of the
limitation on the maximum number of shares purchasable by the Participant on the
Purchase Date shall be promptly refunded.

                  F.  Termination of Purchase  Right.  The following  provisions
shall govern the termination of outstanding purchase rights:

                                  (i) A  Participant  may,  at any time prior to
         the next  Purchase  Date in the offering  period,  terminate his or her
         outstanding purchase right by filing the appropriate form with the Plan
         Administrator  (or its designate),  and no further  payroll  deductions
         shall be collected from the Participant  with respect to the terminated
         purchase right.  Any payroll  deductions  collected during the Purchase
         Period in which such  termination  occurs shall,  at the  Participant's
         election, be immediately refunded or held for the purchase of shares on
         the next  Purchase  Date.  If no such election is made at the time such
         purchase right is  terminated,  then the payroll  deductions  collected
         with  respect to the  terminated  right  shall be  refunded  as soon as
         possible.

                                  (ii) The  termination  of such purchase  right
         shall be irrevocable,  and the Participant may not subsequently  rejoin
         the  offering  period  for  which  the  terminated  purchase  right was
         granted.  In order to resume  participation in any subsequent  offering
         period,  such individual must re-enroll in the Plan (by making a timely
         filing of the  prescribed  enrollment  forms)  on or before  his or her
         scheduled Entry Date into that offering period.

                                  (iii) Should the  Participant  cease to remain
         an Eligible  Employee for any reason  (other than death or  disability)
         while his or her purchase right remains outstanding, then that purchase
         right shall immediately terminate, and all of the Participant's payroll
         deductions  for the  Purchase  Period  in which the  purchase  right so
         terminates shall be immediately refunded.  Should the Participant cease
         to remain an Eligible  Employee by reason of death or disability  while
         his or her purchase right remains outstanding, then that purchase right
<PAGE>
         shall  immediately  terminate,  and  all of the  Participant's  payroll
         deductions  for the Purchase  Period in which such death or  disability
         occurs shall, at the election of the  Participant  (or, in the event of
         the   Participant's   death,   the  personal   representative   of  the
         Participant's estate), be immediately refunded or held for the purchase
         of shares on the next Purchase  Date. If no such election is made prior
         to the next Purchase Date, then the payroll  deductions  collected with
         respect to the terminated right shall be refunded as soon as possible.

                                  (iv) Should the Participant cease to remain in
         active service by reason of an approved  unpaid leave of absence,  then
         no further payroll  deductions shall be collected on the  Participant's
         behalf during such leave, and the Participant  shall have the election,
         exercisable  up until the last  business day of the Purchase  Period in
         which such leave commences,  to (a) withdraw all the payroll deductions
         collected on the  Participant's  behalf to date in that Purchase Period
         or (b) have such  funds held for the  purchase  of shares at the end of
         such Purchase Period.  Upon the Participant's  return to active service
         following the approved leave,  his or her payroll  deductions under the
         Plan shall  automatically  resume at the rate in effect at the time the
         leave  began,  provided  such  return to  service  occurs  prior to the
         expiration date of the offering period in which such leave began.

                  G.  Corporate  Transaction.  Each  outstanding  purchase right
shall automatically be exercised, immediately prior to the effective date of any
Corporate  Transaction,  by applying the payroll  deductions of each Participant
for the  Purchase  Period  in which  such  Corporate  Transaction  occurs to the
purchase of whole shares of Common Stock at a purchase  price per share equal to
eighty-five percent (85%) of the lower of (i) the Fair Market Value per share of
Common Stock on the  Participant's  Entry Date into the offering period in which
such  Corporate  Transaction  occurs or (ii) the Fair Market  Value per share of
Common  Stock  immediately  prior  to  the  effective  date  of  such  Corporate
Transaction.  However,  the applicable share  limitations per Participant  shall
continue to apply to any such  purchase,  and the clause (i) amount  above shall
not, for any Participant  whose Entry Date for the offering period is other than
the start date of that offering  period,  be less than the Fair Market Value per
share of Common Stock on such start date.

                  The Corporation shall use its best efforts to provide at least
ten  (10)-days   prior  written  notice  of  the  occurrence  of  any  Corporate
Transaction,  and Participants shall, following the receipt of such notice, have
the right to terminate their outstanding  purchase rights prior to the effective
date of the Corporate Transaction.

                  H.  Proration of Purchase  Rights.  Should the total number of
shares of Common Stock to be purchased  pursuant to outstanding  purchase rights
on any  particular  date exceed the number of shares then available for issuance
under the Plan, the Plan Administrator  shall make a pro-rata  allocation of the
available  shares on a uniform  and  nondiscriminatory  basis,  and the  payroll
deductions  of each  Participant,  to the  extent  in  excess  of the  aggregate
purchase price payable for the Common Stock pro-rated to such individual,  shall
be refunded.

                  I.  Assignability.  During  the  Participant's  lifetime,  the
purchase right shall be  exercisable  only by the  Participant  and shall not be
assignable  or  transferable  by the  Participant  other  by will or the laws of
descent and distribution following the Participant's death.
<PAGE>
                  J. Stockholder Rights. A Participant shall have no stockholder
rights with  respect to the shares  subject to his or her  outstanding  purchase
right until the shares are purchased on the  Participant's  behalf in accordance
with the  provisions  of the Plan and the  Participant  has  become a holder  of
record of the purchased shares.

     VIII.        ACCRUAL LIMITATIONS

                  A. No  Participant  shall be  entitled  to  accrue  rights  to
acquire Common Stock pursuant to any purchase right  outstanding under this Plan
if and to the extent such accrual,  when  aggregated with (i) rights to purchase
Common Stock accrued under any other  purchase right granted under this Plan and
(ii) similar  rights  accrued under other  employee stock purchase plans (within
the meaning of Code Section 423) of the Corporation or any Corporate  Affiliate,
would  otherwise  permit  such  Participant  to purchase  more than  Twenty-Five
Thousand  Dollars  ($25,000)  worth of stock of the Corporation or any Corporate
Affiliate (determined on the basis of the Fair Market Value of such stock on the
date or dates such rights are granted) for each calendar year such rights are at
any time outstanding.

                  B. For  purposes of applying  such  accrual  limitations,  the
following provisions shall be in effect:

                                  (i) The right to acquire  Common  Stock  under
         each   outstanding   purchase   right  shall  accrue  in  a  series  of
         installments  on each  successive  Purchase  Date  during the  offering
         period on which such right remains outstanding.

                                  (ii) No right to acquire  Common  Stock  under
         any  outstanding   purchase  right  shall  accrue  to  the  extent  the
         Participant  has already accrued in the same calendar year the right to
         acquire Common Stock under one (1) or more other  purchase  rights at a
         rate equal to Twenty-Five  Thousand  Dollars  ($25,000) worth of Common
         Stock  (determined  on the basis of the Fair Market Value of such stock
         on the date or dates of grant) for each  calendar year such rights were
         at any time outstanding.

                  C. Should any purchase right of a Participant not accrue for a
particular  Purchase  Period  by reason of such  accrual  limitations,  then the
payroll  deductions  which the Participant made during that Purchase Period with
respect to such purchase right shall be promptly refunded.

                  D. In the event there is any conflict  between the  provisions
of this Article and one or more provisions of the Plan or any instrument  issued
thereunder, the provisions of this Article shall be controlling.

       IX.        EFFECTIVE DATE AND TERM OF THE PLAN

                  A. The Plan was  adopted by the Board on May 5, 1995 and shall
become  effective at the Effective  Time,  provided no purchase  rights  granted
under the Plan shall be exercised, and no shares of Common Stock shall be issued
hereunder,  until (i) the Plan shall have been approved by the  stockholders  of
the Corporation and (ii) the Corporation shall have complied with all applicable
requirements of the 1933 Act (including the registration of the shares of Common
Stock issuable under the Plan on a Form S-8  registration  statement  filed with
the Securities and Exchange Commission),  all applicable listing requirements of
any stock exchange (or the Nasdaq National  Market,  if applicable) on which the
<PAGE>
Common  Stock is  listed  for  trading  and all  other  applicable  requirements
established by law or regulation.  In the event such stockholder approval is not
obtained,  or such  compliance is not effected,  within twelve (12) months after
the date on which the Plan is adopted by the Board, the Plan shall terminate and
have no further force or effect and all sums collected from Participants  during
the initial offering period hereunder shall be refunded.

                  B.  Unless  sooner  terminated  by the  Board,  the Plan shall
terminate upon the earliest of (i) the last business day in July 2005,  (ii) the
date on which all shares  available for issuance  under the Plan shall have been
sold pursuant to purchase  rights  exercised under the Plan or (iii) the date on
which  all  purchase  rights  are  exercised  in  connection  with  a  Corporate
Transaction.  No further  purchase rights shall be granted or exercised,  and no
further  payroll  deductions  shall be collected,  under the Plan  following its
termination.

        X.        AMENDMENT OF THE PLAN

                  The Board may alter, amend, suspend or discontinue the Plan at
any time to become  effective  immediately  following  the close of any Purchase
Period.  However,  the Board may not, without the approval of the  Corporation's
stockholders,  (i)  materially  increase  the  number of shares of Common  Stock
issuable  under  the  Plan or the  maximum  number  of  shares  purchasable  per
Participant on any one Purchase Date, except for permissible  adjustments in the
event of certain  changes in the  Corporation's  capitalization,  (ii) alter the
purchase price formula so as to reduce the purchase price payable for the shares
of Common Stock  purchasable  under the Plan, or (iii)  materially  increase the
benefits  accruing  to  Participants  under the Plan or  materially  modify  the
requirements for eligibility to participate in the Plan.

         XI.      GENERAL PROVISIONS

                  A. All costs and expenses  incurred in the  administration  of
the Plan shall be paid by the Corporation.

                  B. Nothing in the Plan shall confer upon the  Participant  any
right to continue in the employ of the  Corporation  or any Corporate  Affiliate
for any period of specific  duration or interfere with or otherwise  restrict in
any way the rights of the Corporation (or any Corporate Affiliate employing such
person) or of the  Participant,  which rights are hereby  expressly  reserved by
each, to terminate such person's  employment at any time for any reason, with or
without cause.

                  C. The provisions of the Plan shall be governed by the laws of
the State of New Jersey without resort to that State's conflict-of-laws rules.
<PAGE>



                                   Schedule A
                                   ----------

                          Corporations Participating in
                          Employee Stock Purchase Plan
                            As of the Effective Time
                            ------------------------


                                  Exogen, Inc.




<PAGE>
                                    APPENDIX


                  The following definitions shall be in effect under the Plan:

                  A. Board shall mean the Corporation's Board of Directors.

                  B. Cash  Compensation  shall mean the (i) regular  base salary
paid  to a  Participant  by one or  more  Participating  Companies  during  such
individual's  period  of  participation  in the  Plan,  plus  (ii)  any  pre-tax
contributions made by the Participant to any Code Section 401(k) salary deferral
plan  or any  Code  Section  125  cafeteria  benefit  program  now or  hereafter
established by the Corporation or any Corporate Affiliate, plus (iii) all of the
following  amounts  to the  extent  paid in cash:  overtime  payments,  bonuses,
commissions,  profit-sharing  distributions and other  incentive-type  payments.
However,  Eligible Earnings shall not include any contributions (other than Code
Section  401(k) or Code  Section 125  contributions)  made on the  Participant's
behalf  by  the   Corporation  or  any  Corporate   Affiliate  to  any  deferred
compensation plan or welfare benefit program now or hereafter established.

                  C. Code  shall  mean the  Internal  Revenue  Code of 1986,  as
amended.

                  D. Common Stock shall mean the Corporation's common stock.

                  E.  Corporate  Affiliate  shall mean any parent or  subsidiary
corporation of the  Corporation  (as determined in accordance  with Code Section
424), whether now existing or subsequently established.

                  F.  Corporate  Transaction  shall mean either of the following
stockholder-approved transactions to which the Corporation is a party:

                         (i) a  merger  or  consolidation  in  which  securities
         possessing  more than fifty percent (50%) of the total combined  voting
         power of the Corporation's  outstanding securities are transferred to a
         person or persons  different from the persons holding those  securities
         immediately prior to such transaction, or

                        (ii) the sale,  transfer or other  disposition of all or
         substantially  all  of  the  assets  of  the  Corporation  in  complete
         liquidation or dissolution of the Corporation.

                  G.   Corporation   shall  mean   Exogen,   Inc.,   a  Delaware
corporation,  and any  corporate  successor to all or  substantially  all of the
assets or voting stock of Exogen,  Inc. which shall by appropriate  action adopt
the Plan.

                  H.   Effective   Time   shall  mean  the  time  at  which  the
Underwriting  Agreement is executed and finally priced. Any Corporate  Affiliate
which  becomes a  Participating  Corporation  after  such  Effective  Time shall
designate a subsequent Effective Time with respect to its employee-Participants.

                  I. Eligible Employee shall mean any person who is engaged,  on
a  regularly-scheduled  basis of more than  twenty  (20) hours per week for more
than five (5) months per calendar year, in the rendition of personal services to
any Participating Corporation as an employee for earnings considered wages under
Code Section 3401(a).
<PAGE>
                  J. Entry Date shall mean the date an Eligible  Employee  first
commences  participation  in the offering  period in effect under the Plan.  The
earliest Entry Date under the Plan shall be the Effective Time.

                  K. Fair Market Value per share of Common Stock on any relevant
date shall be determined in accordance with the following provisions:

                         (i) If the  Common  Stock is at the time  traded on the
         Nasdaq National Market, then the Fair Market Value shall be the closing
         selling  price per share of Common  Stock on the date in  question,  as
         such  price is  reported  by the  National  Association  of  Securities
         Dealers on the Nasdaq National Market or any successor system. If there
         is no  closing  selling  price  for the  Common  Stock  on the  date in
         question, then the Fair Market Value shall be the closing selling price
         on the last preceding date for which such quotation exists.

                        (ii) If the  Common  Stock is at the time  listed on any
         Stock Exchange, then the Fair Market Value shall be the closing selling
         price per share of Common  Stock on the date in  question  on the Stock
         Exchange  determined by the Plan Administrator to be the primary market
         for the  Common  Stock,  as such  price  is  officially  quoted  in the
         composite tape of transactions on such exchange. If there is no closing
         selling  price for the Common Stock on the date in  question,  then the
         Fair  Market  Value  shall  be the  closing  selling  price on the last
         preceding date for which such quotation exists.

                       (iii) For purposes of the initial  offering  period which
         begins at the Effective  Time, the Fair Market Value shall be deemed to
         be equal to the price per  share at which the  Common  Stock is sold in
         the initial public offering pursuant to the Underwriting Agreement.

                  L. 1933 Act shall mean the Securities Act of 1933, as amended.

                  M.  Participant   shall  mean  any  Eligible   Employee  of  a
Participating Corporation who is actively participating in the Plan.

                  N.  Participating  Corporation  shall mean the Corporation and
such Corporate Affiliate or Affiliates as may be authorized from time to time by
the Board to extend the benefits of the Plan to their  Eligible  Employees.  The
Participating  Corporations  in the Plan as of the Effective  Time are listed in
attached Schedule A.

                  O. Plan shall mean the  Corporation's  Employee Stock Purchase
Plan, as set forth in this document.

                  P. Plan  Administrator  shall mean the committee of two (2) or
more Board members appointed by the Board to administer the Plan.

                  Q.  Purchase  Date  shall mean the last  business  day of each
Purchase Period. The initial Purchase Date shall be January 31, 1996.

                  R. Purchase  Period shall mean each  successive  six (6)-month
period  within the offering  period at the end of which there shall be purchased
shares of Common Stock on behalf of each Participant.

                  S.  Stock  Exchange  shall  mean  either  the  American  Stock
Exchange or the New York Stock Exchange.
<PAGE>
                  T. Underwriting Agreement shall mean the agreement between the
Corporation  and the  underwriter  or  underwriters  managing the initial public
offering of the Common Stock.

                                                                    Exhibit 23.1



                             CONSENT OF INDEPENDENT
                               PUBLIC ACCOUNTANTS
                               ------------------



         As   independent   public   accountants,   we  hereby  consent  to  the
incorporation  of our  report  included  in this Form  10-K  into the  Company's
previously filed Registration Statement File No. 33-94750.



                                                          /s/ARTHUR ANDERSEN LLP
                                                          ----------------------
                                                             ARTHUR ANDERSEN LLP


New York, New York
December 17, 1997

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
In thousands except share data at 9/30/97, or 12 months ended 9/30/97.
</LEGEND>

       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          SEP-30-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                           4,018
<SECURITIES>                                     4,526
<RECEIVABLES>                                    5,170
<ALLOWANCES>                                     1,786
<INVENTORY>                                      1,515
<CURRENT-ASSETS>                                13,740
<PP&E>                                           1,653
<DEPRECIATION>                                     895
<TOTAL-ASSETS>                                  14,789
<CURRENT-LIABILITIES>                            2,698
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             1
<OTHER-SE>                                      12,090
<TOTAL-LIABILITY-AND-EQUITY>                    14,789
<SALES>                                          7,081
<TOTAL-REVENUES>                                 7,481
<CGS>                                            3,864
<TOTAL-COSTS>                                    3,864
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                   250
<INTEREST-EXPENSE>                                  37
<INCOME-PRETAX>                               (11,148)
<INCOME-TAX>                                         4
<INCOME-CONTINUING>                           (11,152)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (11,152)
<EPS-PRIMARY>                                   (1.12)
<EPS-DILUTED>                                        0
        

</TABLE>


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