EXOGEN INC
10-Q, 1998-05-14
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                  ____________

                                    FORM 10-Q

(Mark One)
[ X ]    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
         SECURITIES EXCHANGE ACT OF 1934

                 For the quarterly period ended March 31, 1998

                                       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)

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

                                       N/A
- --------------------------------------------------------------------------------
               Former name, former address and former fiscal year,
                          if changed since last report.


Indicate by check [X] whether the registrant (1) has filed all reports  required
to be filed by  Sections  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 the number of shares  outstanding  of each of the  issuer's  classes of
common stock, as of the latest  practicable date Common Stock, par value $0.0001
per share: 11,846,642 shares outstanding at April 30, 1998.
<PAGE>


                                  EXOGEN, INC.
                          Quarterly Report on Form 10-Q
                                 March 31, 1998



                                Table of Contents


                                                                               

PART I--Financial Information . . . . . . . . . . . . . . . . . . . . . . . . . 

         Item 1--Financial Statements:
                  Consolidated Balance Sheets . . . . . . . . . . . . . . . . .
                  Consolidated Statements of Operations . . . . . . . . . . . .
                  Consolidated Statements of Comprehensive Income . . . . . . .
                  Consolidated Statements of Cash Flows . . . . . . . . . . . .
                  Notes to Consolidated Financial Statements . . . . . . . . . 

         Item 2--Management's Discussion and Analysis of
           Financial Condition and Results of Operations . . . . . . . . . . . 

PART II--Other Information . . . . . . . . . . . . . . . . . . . . . . . . . . 

         Item 1. Legal Proceedings . . . . . . . . . . . . . . . . . . . . . . 

         Item 2. Changes in Securities and Use of Proceeds . . . . . . . . . . 

         Item 3. Defaults Upon Senior Securities . . . . . . . . . . . . . . . 

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

         Item 5. Other Information . . . . . . . . . . . . . . . . . . . . . . 

         Item 6. Exhibits and Reports on Form 8-K . . . . . . . . . . . . . . .

Signatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

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

                                      CONSOLIDATED BALANCE SHEETS
                                   (in thousands, except share data)

                                                                             March 31,   September 30,
                                                                               1998           1997
                                                                             --------      --------
                                                                            (Unaudited)
                                 ASSETS
<S>                                                                          <C>           <C>
Current assets:
    Cash and cash equivalents ..........................................     $  6,508      $  4,018
    Short-term investments .............................................        5,669         4,526
    Accounts receivable, net ...........................................        2,719         3,384
    Inventories ........................................................        1,065         1,515
    Other current assets ...............................................          502           297
                                                                             --------      --------
                 Total current assets ..................................       16,463        13,740
Furniture, fixtures and equipment, net .................................          626           758
Other assets ...........................................................          254           291
                                                                             --------      --------
                 Total assets ..........................................     $ 17,343      $ 14,789
                                                                             ========      ========

                    LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
    Accounts payable ...................................................     $    423      $    463
    Accrued liabilities ................................................        2,583         2,178
    Capital lease obligations ..........................................         --               2
    Other current liabilities ..........................................           22            55
                                                                             --------      --------
                 Total current liabilities .............................        3,028         2,698
                                                                             --------      --------
                 Total liabilities .....................................        3,028         2,698
                                                                             --------      --------
Commitments and contingencies (Note 2)

Stockholders' equity:
    Preferred Stock, $0.0001 par value; 3,000,000 shares
         authorized at March 31, 1998, and September 30,1997;
         no shares issued or outstanding ...............................         --            --
    Common Stock,  $0.0001 par value;  27,000,000 shares
         authorized at March 31, 1998, and September 30, 1997;
         11,846,267 shares issued and outstanding at March 31, 1998, and
         9,998,140 shares issued and outstanding at September 30, 1997 .            1             1
    Additional paid-in capital .........................................       54,235        46,691
    Cumulative translation adjustment ..................................         (333)         (275)
    Accumulated deficit ................................................      (39,588)      (34,326)
                                                                             --------      --------
                 Total stockholders' equity ............................       14,315        12,091
                                                                             --------      --------
                 Total liabilities and stockholders' equity ............     $ 17,343      $ 14,789
                                                                             ========      ========
</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)



                                                     Three Months Ended         Six Months Ended
                                                          March 31,                   March 31,
                                                  ----------------------      ----------------------
                                                     1998          1997          1998         1997
                                                  --------      --------      --------      --------
                                                       (Unaudited)                 (Unaudited)
<S>                                               <C>           <C>           <C>           <C>    
Revenues:
     Product sales ..........................     $  2,642      $  1,685      $  4,514      $  3,476
                                                  --------      --------      --------      --------
           Total revenues ...................        2,642         1,685         4,514         3,476
                                                  --------      --------      --------      --------

Operating costs and expenses:
     Cost of product sales ..................        1,248           955         2,080         2,088
     Research and development ...............          746           672         1,394         1,684
     Selling, general, and administrative ...        3,018         3,150         5,838         6,401
     Nonrecurring charge for international
          doubtful accounts .................          800          --             800          --
                                                  --------      --------      --------      --------
           Total operating costs and expenses        5,812         4,777        10,112        10,173
                                                  --------      --------      --------      --------

Operating loss ..............................       (3,170)       (3,092)       (5,598)       (6,697)

Other income (expense):
     Interest income, net ...................          176           198           356           439
     Other expense, net .....................           (8)          (16)          (18)          (40)
                                                  --------      --------      --------      --------
           Total other income, net ..........          168           182           338           399
                                                  --------      --------      --------      --------

Loss before income taxes ....................       (3,002)       (2,910)       (5,260)       (6,298)

Provision for income taxes ..................            2          --               2          --
                                                  --------      --------      --------      --------

Net loss ....................................     $ (3,004)     $ (2,910)     $ (5,262)     $ (6,298)
                                                  ========      ========      ========      ========

Basic net loss per common share .............     $  (0.25)     $  (0.29)     $  (0.45)     $  (0.63)
                                                  ========      ========      ========      ========
Diluted net loss per common share ...........     $  (0.25)     $  (0.29)     $  (0.45)     $  (0.63)
                                                  ========      ========      ========      ========
</TABLE>

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

                         CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
                                          (in thousands)



                                                    Three Months Ended         Six Months Ended
                                                        March 31,                  March 31,
                                                  --------------------      --------------------
                                                    1998         1997          1998       1997
                                                  -------      -------      -------      -------
                                                     (Unaudited)               (Unaudited)
<S>                                               <C>          <C>          <C>          <C>
Net loss ....................................     $(3,004)     $(2,910)     $(5,262)     $(6,298)

Other comprehensive loss:
     Foreign currency translation adjustments         (28)        (123)         (58)        (144)
                                                  -------      -------      -------      -------
           Total other comprehensive loss ...         (28)        (123)         (58)        (144)
                                                  -------      -------      -------      -------

Comprehensive loss ..........................     $(3,032)     $(3,033)     $(5,320)     $(6,442)
                                                  =======      =======      =======      =======
</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)
                                                                              Six Months Ended
                                                                                  March 31,
                                                                            --------------------
                                                                              1998         1997
                                                                            -------      -------
                                                                                 (Unaudited)
<S>                                                                         <C>          <C>
Cash flows from operating activities:
     Net loss .........................................................     $(5,262)     $(6,298)
     Adjustments to reconcile net loss to net cash used in
        operating activities:
          Depreciation and amortization ...............................         232          242
          Amortization of net premium on short- and long-term
            investments ...............................................        --             34
          Amortization of nonemployee stock
            option/warrant compensation ...............................          60           60
          Provision for losses on accounts receivable .................         143         --
          Nonrecurring charge for international doubtful accounts .....         800         --
          Other adjustments ...........................................          (3)          51
     Decrease (increase) in assets:
          Accounts receivable, net ....................................        (324)        (683)
          Interest receivable .........................................           1           64
          Inventories .................................................         440         (190)
          Other current assets ........................................        (205)        (131)
          Other assets ................................................          32         --
     Increase (decrease) in liabilities:
          Accounts payable ............................................         (39)        (142)
          Accrued liabilities .........................................         412          362
          Other current liabilities ...................................         (33)         (61)
                                                                            -------      -------
               Net cash used in operating activities ..................      (3,746)      (6,692)
                                                                            -------      -------
Cash flows from investing activities:
     Purchase of short- and long-term investments .....................      (4,643)      (1,392)
     Proceeds from sale of short- and long-term
       investments ....................................................       3,500        3,573
     Purchase of furniture, fixtures and equipment ....................         (96)        (135)
                                                                            -------      -------
               Net cash (used in) provided by investing activities ....      (1,239)       2,046
                                                                            -------      -------
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
                                          EXOGEN, INC.

                              CONSOLIDATED STATEMENTS OF CASH FLOWS
                                          (in thousands)
                                           (continued)
                                                                              Six Months Ended
                                                                                  March 31,
                                                                            --------------------
                                                                              1998         1997
                                                                            -------      -------
                                                                                 (Unaudited)
<S>                                                                         <C>          <C>
Cash flows from financing activities:
     Proceeds from exercise of stock options ..........................           9            4
     Proceeds from sale of Common Stock ...............................       7,475          125
     Principal payments under capital leases ..........................        --             (9)
                                                                            -------      -------
               Net cash provided by financing activities ..............       7,484          120
                                                                            -------      -------
Effect of exchange rate changes on cash and cash
  equivalents .........................................................          (9)         (12)
                                                                            -------      -------

Net increase (decrease) in cash and cash equivalents ..................       2,490       (4,538)
Cash and cash equivalents, beginning of period ........................       4,018        8,115
                                                                            -------      -------
Cash and cash equivalents, end of period ..............................     $ 6,508      $ 3,577
                                                                            =======      =======
</TABLE>
              The accompanying  notes are an integral part of these consolidated
financial statements.
<PAGE>
                                           EXOGEN, INC.

                            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1.       BASIS OF PRESENTATION

         The accompanying  unaudited condensed consolidated financial statements
         reflect all adjustments  (including normal recurring  adjustments) that
         management considers necessary to present fairly the financial position
         of Exogen,  Inc.  ("the  Company") as of March 31, 1998; the results of
         operations  for the three and six months ended March 31, 1998 and 1997;
         and the cash  flows for the six  months  then  ended.  The  results  of
         operations  for the  respective  interim  periods  are not  necessarily
         indicative  of the  results  to be  expected  for the  full  year.  The
         unaudited condensed  consolidated  financial statements,  which include
         the  financial  position,  results  of  operations,  and cash flows for
         Exogen,  Inc. and its wholly owned  subsidiary,  Exogen  (Europe) GmbH,
         should be read in conjunction with the audited  consolidated  financial
         statements  for the year ended  September  30,  1997,  included  in the
         Company's Annual Report on Form 10-K.


2.       COMMITMENTS AND CONTINGENCIES

         The Company is subject to claims and litigation in the ordinary  course
         of business.  In management's  opinion, such claims are not material to
         the Company's  financial  position,  its results of operations,  or its
         cash flows.


3.       NET LOSS PER COMMON SHARE

         In the first quarter of fiscal 1998, the Company  adopted  Statement of
         Financial  Accounting  Standards  No. 128 ("SFAS  128"),  "Earnings per
         Share,"  which  requires  the  presentation  of both basic and  diluted
         earnings  per  share  on the  face of the  Consolidated  Statements  of
         Operations. Options and warrants are not included in the calculation of
         diluted  earnings  per  share  if the  effect  would  be  antidilutive.
         Accordingly, basic and diluted net loss per share do not differ for any
         period presented.

         The weighted-average  number of shares used in the calculation of basic
         and diluted net loss per share is as follows:
<TABLE>
<CAPTION>
                                                             Three Months Ended                    Six Months Ended
                                                                 March 31,                               March 31,
                                                      ------------------------------         ------------------------------
                                                         1998                 1997              1998                 1997
                                                      ----------           ---------         ----------           --------- 
<S>                                                   <C>                  <C>               <C>                  <C>
         Weighted-average shares outstanding.....     11,831,505           9,937,649         11,627,652           9,923,778
</TABLE>
<PAGE>
         Net loss per share under the  provisions  of SFAS 128 for periods prior
         to fiscal  1998 did not differ  from the net loss per share as reported
         in those prior periods.

         The following table  summarizes  securities that were outstanding as of
         March 31, 1998 and 1997, but not included in the calculation of diluted
         net loss per share because such shares are antidilutive:
<TABLE>
<CAPTION>
                                                                March 31,
                                                        ------------------------
                                                         1998              1997
                                                        -------          -------
<S>                                                     <C>              <C>
         Options.................................       945,861          632,398
         Warrants................................       100,000               -

</TABLE>
4.       COMPREHENSIVE INCOME

         Effective  fiscal  1998,  the Company  adopted  Statement  of Financial
         Accounting Standards No. 130, "Reporting  Comprehensive  Income," which
         establishes standards for reporting and displaying comprehensive income
         and its components (revenue, expenses, gains, and losses) in a full set
         of general-purpose financial statements.


5.       NONRECURRING CHARGE

         The operating  loss for the three months and six months ended March 31,
         1998,  includes an $800,000  nonrecurring  charge to write down certain
         international   accounts   receivable,   primarily   in  Germany.   The
         nonrecurring  charge was  precipitated  by a recent  German court case,
         unrelated to the Company,  that challenged a 1995 ruling upon which the
         Company had previously  relied,  and may reduce the  collectibility  of
         certain accounts receivable in Germany.


6.       INVENTORIES

         Inventories consist of the following:
<TABLE>
<CAPTION>

                                                      March 31,      September 30,
                                                        1998             1997
                                                     ---------        ---------
                                                          (in thousands)
<S>                                                  <C>              <C>          
         Finished goods..........................    $     789        $   1,218
         Parts and components....................          276              297
                                                     ---------        --------- 
                                                     $   1,065        $   1,515
                                                     =========        =========
</TABLE>
<PAGE>
7.       SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION
<TABLE>
<CAPTION>
                                                       Six Months Ended March 31,
                                                       --------------------------
                                                        1998            1997
                                                       ------         -------
                                                            (in thousands)
<S>                                                    <C>            <C>

         Interest paid...........................      $    3         $    7
         Income taxes paid.......................      $    2         $    -

</TABLE>
8.       SUBSEQUENT EVENT

         In April 1998, the Company received a $400,000  milestone  payment from
         Teijin  Limited,  related to the Company's  development  agreement with
         Teijin  for   commercialization  of  the  Company's  Sonic  Accelerated
         Fracture  Healing System  ("SAFHS")  device in Japan.  The Company will
         record the payment as revenue in the quarter ended June 30, 1998.
<PAGE>
                                  EXOGEN, INC.


                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                       CONDITION AND RESULTS OF OPERATIONS


The following is  management's  discussion of significant  factors that affected
the Company's interim financial condition and results of operations. This should
be read in conjunction  with  Management's  Discussion and Analysis of Financial
Condition and Results of Operations  included in the Company's  Annual Report on
Form 10-K for the year ended September 30, 1997.

This Report on Form 10-Q 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,
including the Company's Form 10-K.

Results of Operations

Six Months Ended March 31, 1998, and March 31, 1997

For the six  months  ended  March 31,  1998,  essentially  all of the  Company's
product sales were from the Company's Sonic Accelerated  Fracture Healing System
("SAFHS")  devices.  For the six months ended March 31, 1998, product sales were
$4.5  million,  compared  with $3.5  million for the six months  ended March 31,
1997.  The  increase  of $1.0  million  (or 30%) was  primarily  a result  of an
increase  in volume,  partially  offset by a decrease  in the  average  realized
selling price of SAFHS devices. This decrease was primarily caused by a shift in
international sales from direct sales to sales to distributors,  including sales
to Teijin Limited ("Teijin"), the Company's Japanese distributor.

Domestic product sales were $4.0 million (or 89% of total product sales) for the
six months ended March 31, 1998,  an increase of $1.6 million (or 64%) over $2.4
million of domestic  product  sales for the six months ended March 31, 1997.  An
increase in domestic sales volume and in the average  realized  selling price of
SAFHS devices caused the increase in domestic product sales.

Product sales in Europe,  primarily derived from sales in Germany, were $188,000
(or 4% of total  product  sales)  for the six months  ended  March 31,  1998,  a
decrease of $851,000 (or 82%)  compared  with $1.0  million of product  sales in
Europe for the six months ended March 31, 1997. The decrease was a result of (i)
an adjustment  in the quarter ended  December 31, 1997, to increase the reserves
for European sales allowances and returns and (ii) the Company's election, since
September  1997,  to sell SAFHS  devices in Germany only when  reimbursement  is
preapproved.  In addition to product sales in Europe, in March 1998, the Company
recorded its initial sales to Teijin of $332,000 (or 7% of total product  sales)
for the six months ended March 31, 1998.
<PAGE>
Cost of product  sales was $2.1 million for the six months ended March 31, 1998,
and for the six months  ended  March 31,  1997.  Included  in cost of sales were
royalties and the cost of  manufacture of the SAFHS device by the Company and an
outside  source.  Gross profit for the six months ended March 31, 1998, was $2.4
million (or 54% as a percentage  of product  sales),  compared with $1.4 million
(or 40%) for the six months ended March 31, 1997. The $1.0 million  increase (or
75%) in gross profit was principally due to (i) reduced  per-unit  product costs
principally  related to the  introduction of the SAFHS 2000 and (ii) an increase
in sales volume,  partially offset by a decrease in the average realized selling
price of SAFHS devices.

Research  and  development  expenses  for the six months  ended March 31,  1998,
decreased  to $1.4  million from $1.7 million for the six months ended March 31,
1997.  The  decrease  of  $290,000  (or 17%)  was  primarily  a result  of (i) a
reduction from fiscal 1997 in the number of research  projects funded during the
first quarter and (ii) savings from a workforce reduction in fiscal 1997.

Selling, general, and administrative expenses for the six months ended March 31,
1998, decreased to $5.8 million from $6.4 million for the six months ended March
31, 1997.  The  decrease of $563,000  (or 9%)  resulted  from (i) a reduction in
marketing  consultation  and (ii) savings  from a workforce  reduction in fiscal
1997.

In  March  1998,  the  Company  recorded  an  $800,000  nonrecurring  charge  to
operations  to write down certain  European  accounts  receivable,  primarily in
Germany. The nonrecurring charge was precipitated by a recent German court case,
unrelated to the Company,  that  challenged a 1995 ruling upon which the Company
had previously  relied,  and may reduce the  collectibility  of certain accounts
receivable  in Germany.  The Company  continues  to pursue  collection  of these
receivables case-by-case.

Net  interest  income for the six months  ended  March 31,  1998,  decreased  to
$356,000 from $439,000 for the six months ended March 31, 1997,  consistent with
the level of funds available for investment.

The Company incurred a net loss of $5.3 million, or $0.45 per share, for the six
months ended March 31, 1998,  compared with a net loss of $6.3 million, or $0.63
per share,  for the six months ended March 31,  1997.  (Per share data are based
upon weighted  average shares  outstanding,  which exclude  options and warrants
because  they  are  antidilutive.  See  Note  3 to  the  Consolidated  Financial
Statements for a discussion of the  calculation of per share data.) The decrease
of $1.0  million  (or 16%) in net loss was  caused  principally  by the  factors
discussed above.

Three Months Ended March 31, 1998, and March 31, 1997

For the three  months  ended March 31, 1998,  essentially  all of the  Company's
product sales were from the Company's Sonic Accelerated  Fracture Healing System
("SAFHS") devices. For the three months ended March 31, 1998, product sales were
$2.6  million,  compared  with $1.7 million for the three months ended March 31,
1997. The increase of $957,000 (or 57%) was primarily a result of an increase in
volume,  partially offset by a decrease in the average realized selling price of
SAFHS devices.  This decrease was primarily  caused by a shift in  international
sales from direct sales to sales to distributors, including sales to Teijin.
<PAGE>
Domestic product sales were $2.1 million (or 80% of total product sales) for the
three months  ended March 31,  1998,  an increase of $936,000 (or 79%) over $1.2
million of domestic  product sales for the three months ended March 31, 1997. An
increase in domestic sales volume and in the average  realized  selling price of
SAFHS devices caused the increase in domestic product sales.

Product sales in Europe,  primarily derived from sales in Germany, were $188,000
(or 7% of total  product  sales) for the three  months  ended March 31,  1998, a
decrease of $311,000 (or 62%)  compared with $499,000 of product sales in Europe
for the three months ended March 31, 1997. Since September 1997, the Company has
elected to sell SAFHS devices in Germany only when reimbursement is preapproved,
which has caused the decrease in sales in Europe.  In addition to product  sales
in Europe,  in March 1998,  the Company  recorded its initial sales to Teijin of
$332,000  (or 13% of total  product  sales) for the three months ended March 31,
1998.

Cost of product  sales was $1.2  million  for the three  months  ended March 31,
1998, compared with $955,000 for the three months ended March 31, 1997. Included
in cost of sales were  royalties and the cost of manufacture of the SAFHS device
by the Company and an outside  source.  Gross  profit for the three months ended
March 31,  1998,  was $1.4 million (or 53% as a  percentage  of product  sales),
compared with  $730,000 (or 43%) for the three months ended March 31, 1997.  The
$664,000  increase  (or  91%) in  gross  profit  was  principally  due to (i) an
increase in sales volume and (ii) reduced  per-unit  product  costs  principally
related to the introduction of the SAFHS 2000, partially offset by a decrease in
the average realized selling price of SAFHS devices.

Research  and  development  expenses  for the three months ended March 31, 1998,
increased to $746,000  from  $672,000 for the three months ended March 31, 1997.
The increase of $74,000 (or 11%) was primarily a result of the  commencement  of
additional  research  projects,  partially  offset by savings  from a  workforce
reduction in fiscal 1997.

Selling,  general, and administrative  expenses for the three months ended March
31, 1998, decreased to $3.0 million from $3.2 million for the three months ended
March 31, 1997.  The decrease of $132,000  (or 4%)  resulted  primarily  from an
overall  reduction  in  marketing  expenses,  which were  greater in fiscal 1997
because of the  introduction  of the SAFHS 2000 in April  1997.  Savings  from a
workforce reduction in fiscal 1997 added to the decrease in expenses.

In  March  1998,  the  Company  recorded  an  $800,000  nonrecurring  charge  to
operations  to write down certain  European  accounts  receivable,  primarily in
Germany. The nonrecurring charge was precipitated by a recent German court case,
unrelated to the Company,  that  challenged a 1995 ruling upon which the Company
had previously  relied,  and may reduce the  collectibility  of certain accounts
receivable  in Germany.  The Company  continues  to pursue  collection  of these
receivables case-by-case.

Net interest  income for the three  months  ended March 31,  1998,  decreased to
$176,000  from  $198,000 for the three  months ended March 31, 1997,  consistent
with the level of funds available for investment.

The Company  incurred a net loss of $3.0  million,  or $0.25 per share,  for the
three months ended March 31, 1998,  compared with a net loss of $2.9 million, or
$0.29 per share,  for the three months ended March 31, 1997. (Per share data are
<PAGE>
based upon  weighted  average  shares  outstanding,  which  exclude  options and
warrants because they are antidilutive. See Note 3 to the Consolidated Financial
Statements for a discussion of the  calculation of per share data.) The increase
of $94,000 (or 3%) 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 $39.6  million at March 31,
1998.  Through  September  30,  1997,  the  Company  had funded  its  operations
primarily  through  two  early-stage  private  placements  of equity  securities
(aggregating  $17.6 million) and an Initial  Public  Offering of Common Stock in
July 1995 (aggregating $28.5 million,  including proceeds from the overallotment
option). In October 1997, the Company completed a private placement of 1,799,019
shares of its Common Stock for aggregate net proceeds of $7.4 million.

For the six months  ended  March 31,  1998,  the  Company  used net cash of $3.7
million for operating activities, primarily to fund selling and marketing of the
SAFHS 2000.  Working capital was $13.4 million at March 31, 1998, an increase of
$2.4 million (or 22%) from the balance at  September  30,  1997.  The  Company's
capital  expenditures for the six months ended March 31, 1998, were $96,000. 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 fiscal 1998 and 1999.

From December 1995 through March 31, 1998, the Company has recorded $1.5 million
of revenues related to development agreements with Teijin. No such revenues were
recognized  in the six months  ended March 31,  1998 or 1997,  although in April
1998,  the Company  recorded an  additional  $400,000  of such  revenues.  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 is responsible  for
manufacturing  and  supplying  SAFHS  devices to Teijin for clinical  trials and
sales in Japan,  while Teijin is  responsible  for complying with the regulatory
requirements  and  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.

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.

Year 2000 Compliance

Many existing  computerized  applications  were  designed and developed  without
considering the impact of the upcoming change in the century.  If not corrected,
many of these  applications  could fail or create errors by or at the year 2000.
Management  continues to assess the year 2000 compliance impact on the Company's
operations, but does not expect compliance costs to be material.
<PAGE>
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 U.S.  Food and Drug  Administration  ("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 Pre-Market Approval ("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  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, Japan, 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
<PAGE>
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
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  ("HCFA")  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 March 31,
1998, had an accumulated  deficit of  approximately  $39.6 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
<PAGE>
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.

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, the United Kingdom, 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 or its  partners  can  successfully
market  the SAFHS  device in Europe or in Japan or that the  Company  can secure
additional  marketing  partners in the Pacific  Rim on terms  acceptable  to the
Company, or at all.
<PAGE>
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.
Product  sales in Europe,  which were  primarily  derived from sales in Germany,
were 14% of total product sales in fiscal 1996,  18% in fiscal 1997, and for the
six months ended March 31, 1998, were 4% of total product sales.

In the three months ended March 31, 1998, the Company recorded its initial sales
to  Teijin,   its  Japanese   distributor.   The  Company  is  responsible   for
manufacturing  and  supplying  SAFHS  devices to Teijin for clinical  trials and
sales in Japan,  while Teijin is  responsible  for complying with the regulatory
requirements and marketing and  distributing the SAFHS device in Japan.  Product
sales to Japan were 7% of total product sales for the six months ended March 31,
1998.

Management expects international  revenues 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.

As of March 31,  1998,  the  balance in  European  accounts  receivable,  net of
allowances  for  returns  and bad debt,  was  $326,000.  The  European  accounts
receivable  is primarily  derived  from sales in Germany,  where the Company has
received  limited local  reimbursement  on a case-by-case  basis. In the quarter
ended March 31, 1998, the Company  recorded an $800,000  nonrecurring  charge to
operations to write down certain of its European accounts receivable,  primarily
in Germany,  which exceeded 180 days  outstanding.  The nonrecurring  charge was
precipitated  by a recent  German court case,  unrelated  to the  Company,  that
challenged a 1995 ruling upon which the Company had previously  relied,  and may
reduce the collectibility of certain accounts  receivable in Germany.  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.  In May 1998, an article in a German medical  publication  indicated
that the reviewing body has  recommended to the German Minister of Health not to
provide  national   reimbursement  for  SAFHS  therapy;   it  is  the  Company's
understanding  that the  Minister  of Health  will now decide  whether or not to
<PAGE>
accept this recommendation.  If the recommendation is accepted, the Company will
seek an  appeal  or  resubmit  its  application  with  further  information,  if
necessary.  Unless and until such approval is obtained,  the Company has elected
to sell SAFHS devices in Europe only when  reimbursement  is preapproved,  which
has caused a downward  trend in European  sales.  There can be no assurance that
the Company will ultimately receive nationwide  approval in any European country
on a timely  basis,  if at all.  Lack of European  approvals  for the  Company's
products  could  have  a  material  adverse  effect  on the  Company's  European
business, financial condition, results of operations, and cash flows.

The  Company's  European  operations  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  Quality
System  Regulations.   Any  failure  by  either  the  Company  or  the  contract
manufacturer  to maintain its respective  facility in accordance  with the FDA's
Good Manufacturing  Practices ("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.

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
<PAGE>
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.

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. In June 1997, the Company 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 third  quarter of fiscal
<PAGE>
1998. 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,
and in 1998, for the SAFHS 2000. 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.

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
<PAGE>
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  completed 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
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.
<PAGE>
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.

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
<PAGE>
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.

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.
<PAGE>
                                     PART II
                                OTHER INFORMATION



ITEM 1.           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 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 has
                  made 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.

                  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
<PAGE>
                  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
                  amend  its  answer.   The  Court  recently  dismissed  Pilla's
                  counterclaim  and denied Pilla  permission to amend,  but gave
                  Pilla permission to replead its counterclaim. In January 1998,
                  Pilla  served an amended  counterclaim.  The Company has again
                  made a motion to dismiss Pilla's counterclaims; however, there
                  can be no  assurance  that the motion  will be granted or that
                  Pilla's  counterclaims will not be upheld. The Company intends
                  to  aggressively  pursue  the  action  against  Pilla  and  to
                  vigorously  defend against the  counterclaims by Pilla seeking
                  said  royalties or  equivalent  payments if they are upheld by
                  the Court.


ITEM 2.           Changes in Securities and Use of Proceeds

                  Initial Public Offering

                  The  Company  filed,   effective  July  19,  1995,  its  first
                  registration statement (the "Registration  Statement") on Form
                  S-1  (Registration  No.  33-92740) under the Securities Act of
                  1933,  as  amended.  The class of  securities  registered  was
                  Common Stock. The offering commenced on July 20, 1995, and all
                  securities   were   sold  in  the   offering.   The   managing
                  underwriters  for the  offering  were  Robertson,  Stephens  &
                  Company (now known as BancAmerica Robertson Stephens); Cowen &
                  Company; and Piper Jaffray, Inc.

                  Pursuant to the Registration Statement, the Company registered
                  and sold  2,875,000  shares of Common  Stock for an  aggregate
                  offering  price of $31.6 million.  The Company  incurred total
                  expenses  in the  offering  of $3.1  million,  of  which  $2.2
                  million represented underwriting discounts and commissions and
                  approximately  $910,000  represented other expenses.  All such
                  expenses were direct or indirect  payments to others.  The net
                  offering  proceeds to the Company  after  deducting  the total
                  expenses were $28.5 million.

                  From the  effective  date to March 31,  1998,  the Company has
                  used all of net offering proceeds as follows: $9.1 million for
                  research and  development,  $11.4 million for sales expansion,
                  $787,000  for  manufacturing,  and $7.2  million  for  working
                  capital and general  corporate use. This represents a material
                  change from the use of proceeds  described in the  prospectus.
                  Since the effective  date,  the Company has shifted funds from
                  research and  development  to marketing and  reimbursement  in
                  support of the SAFHS device.
<PAGE>
ITEM 3.           Defaults Upon Senior Securities

                  None.


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


                  (a) The Company's  Annual Meeting of Stockholders  was held on
                      February 25, 1998.

                  (c) The motions before stockholders were:

                          (1)       To elect seven Directors.
<TABLE>
<CAPTION>

                                                                Votes         Votes       Votes                      Broker
                                    Name of Director             For         Against    Withheld    Abstentions    Nonvotes
                                    ----------------             ---         -------    --------    -----------    --------
<S>                                                           <C>              <C>       <C>             <C>          <C>
                                    John P. Ryaby             10,043,202        -        193,647          -            -
                                    Patrick A. McBrayer       10,043,754        -        193,095          -            -
                                    Buzz Benson               10,043,754        -        193,095          -            -
                                    Donald J. Lothrop         10,038,754        -        198,095          -            -
                                    Peter C. Madeja           10,038,254        -        198,595          -            -
                                    David J. Ottensmeyer,
                                         M.D.                 10,027,153        -        209,696          -            -
                                    Terence D. Wall           10,043,754        -        193,095          -            -
</TABLE>

                          (2)       To  approve an  amendment  to the 1995 Stock
                                    Option / Stock Issuance Plan, which included
                                    an  increase  in the  number  of  shares  of
                                    Common   Stock    available   for   issuance
                                    thereunder from 750,000 to 1,350,000 shares.

                                    Votes For          7,038,487
                                    Votes Against      1,047,575
                                    Votes Withheld             -
                                    Abstentions           13,490
                                    Broker Nonvotes    2,137,297

                          (3)       To  approve  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.


                                    Votes For          6,999,910
                                    Votes Against      1,195,668
                                    Votes Withheld             -
                                    Abstentions           13,470
                                    Broker Nonvotes    2,027,801
<PAGE>
                          (4)       To ratify the  selection of Arthur  Andersen
                                    LLP,  independent  public  accountants,   as
                                    auditors  of the Company for the fiscal year
                                    ending September 30, 1998.

                                    Votes For         10,176,714
                                    Votes Against         48,525
                                    Votes Withheld             -
                                    Abstentions           11,610
                                    Broker Nonvotes            -


ITEM 5.           Other Information

                  None.
 

ITEM 6.           Exhibits and Reports on Form 8-K

                  (a)      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     [RESERVED]
                          10.11     [RESERVED]
                          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.
                                    Incorporated  by reference to Exhibit  10.17
                                    to the  Company's  Form  10-K  for the  year
                                    ended September 30, 1997.
                          10.18     Common  Stock  Purchase   Agreement,   dated
                                    October  20,  1997,  between the Company and
                                    certain   investors  listed  on  Schedule  1
                                    thereto.   Incorporated   by   reference  to
                                    Exhibit 10.18 to the Company's Form 10-K for
                                    the year ended September 30, 1997.
                          10.19     Registration Rights Agreement, dated October
                                    20,  1997,  between  the Company and certain
                                    investors  listed  on  Schedule  1  thereto.
                                    Incorporated  by reference to Exhibit  10.19
                                    to the  Company's  Form  10-K  for the  year
                                    ended September 30, 1997.
                          10.20     The 1995 Stock Option / Stock Issuance Plan,
                                    as   amended   on   November    14,    1997.
                                    Incorporated by reference to Exhibit 99.1 to
                                    the   Company's   Form   S-8    Registration
                                    Statement (Registration No. 333-51731).
                          10.21     The Employee Stock Purchase Plan, as amended
                                    on  November  14,  1997.   Incorporated   by
                                    reference to Exhibit  99.9 to the  Company's
                                    Form     S-8     Registration      Statement
                                    (Registration No. 333-51731).  
                          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.
                          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
                                    quarter for which this report is filed.
<PAGE>



                                   SIGNATURES


Pursuant  to the  requirements  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.
                                                     (Registrant)




May 12, 1998                       By:    /s/ Patrick A. McBrayer
                                          -------------------------
                                          Patrick A. McBrayer, President and
                                          Chief Executive Officer




May 12, 1998                       By:    /s/ Richard H. Reisner
                                          ------------------------
                                          Richard H. Reisner, Vice President and
                                          Chief Financial Officer (Principal 
                                          Financial Officer and
                                          Principal Accounting Officer)

<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 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).
               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).
<PAGE>
                                  EXOGEN, INC.

                            EXHIBIT INDEX (continued)

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

               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       [RESERVED]
               10.11       [RESERVED]
               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.  Incorporated by reference to
                           Exhibit 10.17 to the Company's Form 10-K for the year
                           ended September 30, 1997.
               10.18       Common Stock  Purchase  Agreement,  dated October 20,
                           1997,  between  the  Company  and  certain  investors
                           listed  on  Schedule  1  thereto.   Incorporated   by
                           reference to Exhibit 10.18 to the Company's Form 10-K
                           for the year ended September 30, 1997.
               10.19       Registration  Rights  Agreement,  dated  October  20,
                           1997,  between  the  Company  and  certain  investors
                           listed  on  Schedule  1  thereto.   Incorporated   by
                           reference to Exhibit 10.19 to the Company's Form 10-K
                           for the year ended September 30, 1997.
               10.20       The 1995  Stock  Option  / Stock  Issuance  Plan,  as
                           amended  on  November  14,  1997.   Incorporated   by
                           reference to Exhibit 99.1 to the  Company's  Form S-8
                           Registration Statement (Registration No. 333-51731).
               10.21       The  Employee  Stock  Purchase  Plan,  as  amended on
                           November  14,  1997.  Incorporated  by  reference  to
                           Exhibit 99.9 to the Company's  Form S-8  Registration
                           Statement (Registration No. 333-51731).
               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.
               27*         Financial Data Schedule.
<PAGE>
                                  EXOGEN, INC.

                            EXHIBIT INDEX (continued)

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

               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.

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
IN THOUSANDS, EXCEPT SHARE DATA AT 3/31/98, OR 6 MONTHS ENDED 3/31/98. 
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          SEP-30-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                           6,508
<SECURITIES>                                     5,669
<RECEIVABLES>                                    6,500
<ALLOWANCES>                                     3,781
<INVENTORY>                                      1,065
<CURRENT-ASSETS>                                16,463
<PP&E>                                           1,727
<DEPRECIATION>                                   1,101
<TOTAL-ASSETS>                                  17,343
<CURRENT-LIABILITIES>                            3,028
<BONDS>                                              0
                                0
                                          0
<COMMON>                                             1
<OTHER-SE>                                      14,314
<TOTAL-LIABILITY-AND-EQUITY>                    17,343
<SALES>                                          4,514
<TOTAL-REVENUES>                                 4,514
<CGS>                                            2,080
<TOTAL-COSTS>                                    2,080
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                   943
<INTEREST-EXPENSE>                                   3
<INCOME-PRETAX>                                (5,260)
<INCOME-TAX>                                         2
<INCOME-CONTINUING>                            (5,262)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   (5,262)
<EPS-PRIMARY>                                   (0.45)
<EPS-DILUTED>                                   (0.45)
        

</TABLE>


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