GENZYME CORP
10-Q, 1998-08-14
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>   1


                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON D.C. 20549

                                    FORM 10-Q
                                    ---------

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

         For the quarterly period ended June 30, 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 0-14680
                                -------


                              GENZYME CORPORATION
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


        Massachusetts                                            06-1047163
- --------------------------------------------------------------------------------
(State or other jurisdiction of                                (IRS Employer
incorporation or organization)                               Identification No.)


One Kendall Square, Cambridge, Massachusetts                       02139
- --------------------------------------------------------------------------------
  (Address of principal executive offices)                       (zip code)


                                 (617) 252-7500
- --------------------------------------------------------------------------------
              (Registrant's telephone number, including area code)


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

The number of shares outstanding of each of the issuer's classes of common stock
as of July 31, 1998:

                  Series
                  ------
Genzyme General Division Common Stock
("GGD Stock")                                                   78,948,594
                                                              
Genzyme Tissue Repair Division Common Stock
("GTR Stock")                                                   20,278,552
                                                               
Genzyme Molecular Oncology Division Common Stock
("GMO Stock")                                                    3,928,572


<PAGE>   2


                      GENZYME CORPORATION AND SUBSIDIARIES
                            FORM 10-Q, JUNE 30, 1998


NOTE REGARDING FORWARD-LOOKING STATEMENTS:
This report on Form 10-Q for Genzyme Corporation ("Genzyme" or the "Company")
contains forward-looking statements concerning, among other things, the
Company's future revenues, operations and expenditures. All such forward-looking
statements are necessarily only estimates of future results and the actual
results may differ materially from these projections due to a number of factors,
including (i) the Company's ability to successfully complete preclinical and
clinical development and obtain timely regulatory approval and patent and other
proprietary rights protection of its products and services, (ii) the content and
timing of decisions made by the U.S. Food and Drug Administration (the "FDA")
regarding the indications for which the Company's products may be approved,
(iii) the accuracy of the Company's estimates of the size and characteristics of
markets to be addressed by the Company's products and services, (iv) market
acceptance of the Company's products and services, (v) the Company's ability to
obtain reimbursement for its products from third-party payers, where
appropriate, (vi) the accuracy of the Company's information concerning the
products and resources of competitors and potential competitors and (vii) the
risks and uncertainties described under the heading "Factors Affecting Future
Operating Results" in the sections entitled (a) "Management's Discussion and
Analysis of Genzyme Corporation and Subsidiaries' Financial Condition and
Results of Operations" and "Management's Discussion and Analysis of Genzyme
General's Financial Condition and Results of Operations" in the Genzyme General
Annual Report for the fiscal year ended December 31, 1997 (the "1997 Genzyme
General Annual Report"), (b) "Management's Discussion and Analysis of Genzyme
Tissue Repair's Financial Condition and Results of Operations" in the Genzyme
Tissue Repair Annual Report for the fiscal year ended December 31, 1997 (the
"1997 GTR Annual Report") and (c) "Management's Discussion and Analysis of
Genzyme Molecular Oncology's Financial Condition and Results of Operations" in
the Genzyme Molecular Oncology Annual Report for the fiscal year ended December
31, 1997 (the "1997 GMO Annual Report"). The 1997 Genzyme General Annual Report,
the 1997 GTR Annual Report and the 1997 GMO Annual Report were filed as Exhibits
13.1, 13.2 and 13.3, respectively, to the Company's Annual Report on Form 10-K
for the fiscal year ended December 31, 1997, as amended on Form 10-K/A (the
"1997 Genzyme 10-K/A").


                                      -2-
<PAGE>   3


                      GENZYME CORPORATION AND SUBSIDIARIES
                            FORM 10-Q, JUNE 30, 1998
                                TABLE OF CONTENTS


PART I.         FINANCIAL INFORMATION

<TABLE>
<CAPTION>
                                                                                                                   PAGE NO.
                                                                                                                   --------

<S>                                                                                                                   <C>
ITEM 1.         Financial Statements                                                                                   

   GENZYME GENERAL
     Unaudited, Combined Balance Sheets as of June 30, 1998 and December 31, 1997..................................    4
     Unaudited, Combined Statements of Operations for the Three and Six Months Ended June 30, 1998 and 1997........    5
     Unaudited, Combined Statements of Cash Flows for the Six Months Ended June 30, 1998 and 1997..................    6
     Notes to Unaudited, Combined Financial Statements.............................................................    7

   GENZYME TISSUE REPAIR
     Unaudited, Combined Balance Sheets as of June 30, 1998 and December 31, 1997..................................   10
     Unaudited, Combined Statements of Operations for the Three and Six Months Ended June 30, 1998 and 1997........   11
     Unaudited, Combined Statements of Cash Flows for the Six Months Ended June 30, 1998 and 1997..................   12
     Notes to Unaudited, Combined Financial Statements.............................................................   13

   GENZYME MOLECULAR ONCOLOGY
     Unaudited, Combined Balance Sheets as of June 30, 1998 and December 31, 1997..................................   15
     Unaudited, Combined Statements of Operations for the Three and Six Months Ended June 30, 1998 and 1997........   16
     Unaudited, Combined Statements of Cash Flows for the Six Months Ended June 30, 1998 and 1997..................   17
     Notes to Unaudited, Combined Financial Statements.............................................................   18

   GENZYME CORPORATION AND SUBSIDIARIES
     Unaudited, Consolidated Balance Sheets as of June 30, 1998 and December 31, 1997..............................   20
     Unaudited, Consolidated Statements of Operations for the Three and Six Months Ended June 30, 1998 and 1997 ...   21
     Unaudited, Consolidated Statements of Cash Flows for the Six Months Ended June 30, 1998 and 1997 .............   23
     Notes to Unaudited, Consolidated Financial Statements..........................................................  24

ITEM 2.        Management's Discussion and Analysis of Financial Condition and Results of Operations...............   28

ITEM 3.        Quantitative and Qualitative Disclosures About Market Risk..........................................   36

PART II.     OTHER INFORMATION

ITEM 2.        Changes in Securities and Use of Proceeds...........................................................   37

ITEM 4.        Submission of Matters to a Vote of Security Holders.................................................   37

ITEM 6.        Exhibits and Reports on Form 8-K ...................................................................   38

Signatures.........................................................................................................   39
</TABLE>

                                      -3-
<PAGE>   4


GENZYME GENERAL
COMBINED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                 JUNE 30,           DECEMBER 31,
(UNAUDITED, AMOUNTS IN THOUSANDS)                                                    1998                   1997
- -----------------------------------------------------------------------------------------           ------------
<S>                                                                            <C>                    <C>       
                                     ASSETS

Current assets:
   Cash and cash equivalents ...............................................   $  276,760             $   66,276
   Short-term investments ..................................................       34,938                 35,294
   Accounts receivable, net ................................................      134,645                116,056
   Inventories .............................................................      133,489                137,708
   Prepaid expenses and other current assets ...............................       17,779                 15,941
   Due from Genzyme Molecular Oncology .....................................        5,540                  5,434
   Due from Genzyme Tissue Repair ..........................................        1,233                  1,213
   Deferred tax assets - current ...........................................       27,973                 27,601
                                                                               ----------             ----------
      Total current assets .................................................      632,357                405,523

Property, plant and equipment, net .........................................      381,788                365,337

Long-term investments ......................................................      159,490                 91,627
Intangibles, net ...........................................................      245,672                243,071
Deferred tax assets - noncurrent ...........................................       36,028                 35,988
Investment in equity securities ............................................       26,730                 30,047
Other ......................................................................       36,441                 31,463
                                                                               ----------             ----------
      Total assets .........................................................   $1,518,506             $1,203,056
                                                                               ==========             ==========

                         LIABILITIES AND DIVISION EQUITY

Current liabilities:
   Accounts payable ........................................................   $   16,882             $   18,409
   Accrued expenses ........................................................       66,639                 66,865
   Income taxes payable ....................................................       21,718                 11,157
   Current portion of long-term debt and capital lease obligations .........       20,796                    887
                                                                               ----------             ----------
     Total current liabilities .............................................      126,035                 97,318

Long-term debt and capital lease obligations ...............................       85,167                117,978
Convertible subordinated notes .............................................      250,000                      -
Other ......................................................................        8,017                  6,884
                                                                               ----------             ----------
     Total liabilities .....................................................      469,219                222,180


Division equity ............................................................    1,049,287                980,876
                                                                               ----------             ----------
     Total liabilities and division equity .................................   $1,518,506             $1,203,056
                                                                               ==========             ==========
</TABLE>



    The accompanying notes are an integral part of these unaudited, combined
                              financial statements


                                      -4-
<PAGE>   5


GENZYME GENERAL
COMBINED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                          THREE MONTHS ENDED               SIX MONTHS ENDED
                                                                                JUNE 30,                        JUNE 30,
                                                                       ------------------------        ------------------------
(UNAUDITED, AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)                1998            1997            1998            1997
- -----------------------------------------------------------------------------------------------        ------------------------

<S>                                                                    <C>             <C>             <C>             <C>     
Total revenues .................................................       $168,980        $147,614        $323,103        $292,220

Operating costs and expenses:
    Cost of products and services sold .........................         57,112          54,477         111,589         110,305
    Selling, general and administrative ........................         47,897          40,801          93,008          81,673
    Research and development ...................................         21,104          18,976          39,522          36,300
    Amortization of intangibles ................................          3,300           3,164           6,499           6,360
                                                                       --------        --------        --------        --------
          Total operating costs and expenses ...................        129,413         117,418         250,618         234,638
                                                                       --------        --------        --------        --------

Operating income ...............................................         39,567          30,196          72,485          57,582

Other income (expenses):
    Equity in net loss of unconsolidated affiliates ............         (4,087)           (783)         (6,992)           (853)
    Gain on affiliate sale of stock ............................          2,369               -           2,369               -
    Minority interest ..........................................            860               -           1,724               -
    Investment income ..........................................          4,856           2,594           7,776           4,912
    Interest expense ...........................................         (3,351)         (1,719)         (5,341)         (4,000)
                                                                       --------        --------        --------        --------
       Total other income (expenses) ...........................            647              92            (464)             59
                                                                       --------        --------        --------        --------

Income before income taxes .....................................         40,214          30,288          72,021          57,641
Provision for income taxes .....................................        (15,254)        (11,533)        (27,764)        (22,159)
                                                                       --------        --------        --------        --------
Net income .....................................................         24,960          18,755          44,257          35,482
Tax benefit allocated from Genzyme Tissue Repair ...............          3,390           4,327           7,796           8,838
Tax benefit allocated from Genzyme Molecular Oncology ..........          2,850             201           4,085             201
                                                                       --------        --------        --------        --------
Net income .....................................................       $ 31,200        $ 23,283        $ 56,138        $ 44,521
                                                                       ========        ========        ========        ========

Per Genzyme General common share:

  Net income per Genzyme General common share - basic ..........       $   0.40        $   0.31        $   0.72        $   0.59
                                                                       ========        ========        ========        ========

Weighted average shares outstanding ............................         78,524          76,065          78,223          75,856
                                                                       ========        ========        ========        ========

  Net income per Genzyme General common and common
    equivalent share - diluted .................................       $   0.39        $   0.30        $   0.70        $   0.57
                                                                       ========        ========        ========        ========

Adjusted weighted average shares outstanding ...................         80,679          78,130          80,520          78,184
                                                                       ========        ========        ========        ========
</TABLE>





    The accompanying notes are an integral part of these unaudited, combined
                              financial statements.


                                      -5-
<PAGE>   6


GENZYME GENERAL
COMBINED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                             SIX MONTHS ENDED
(UNAUDITED, AMOUNTS IN THOUSANDS)                                                                 JUNE 30,
- ---------------------------------------------------------------------------------------------------------------------
OPERATING ACTIVITIES:                                                                       1998                 1997
                                                                                       ---------            ---------
<S>                                                                                    <C>                  <C>      
    Net income ....................................................................    $  44,257            $  35,482
    Reconciliation of net income to net cash provided by operating activities:
       Depreciation and amortization ..............................................       23,351               14,830
       Non-cash compensation expense ..............................................           31                    -
       Accrued interest/amortization on bonds .....................................       (2,041)                 578
       Provision for bad debts and inventory ......................................        3,136                2,260
       Equity in net loss of unconsolidated affiliates, net .......................        6,992                  853
       Gain on affiliate sale of stock ...........................................        (2,369)                   -
       Minority interest in net loss of subsidiaries ..............................       (1,724)                   -
       Other ......................................................................          162                  502
       Increase (decrease) in cash from working capital changes:
          Accounts receivable .....................................................      (22,280)              (9,102)
          Inventories .............................................................        4,616              (13,194)
          Prepaid expenses and other current assets ...............................       (1,887)              (2,547)
          Accounts payable, accrued expenses, income taxes payable and
              deferred revenue ....................................................       21,992                 (634)
          Due from Genzyme Tissue Repair ..........................................          (20)               1,375
          Due from Genzyme Molecular Oncology .....................................         (182)                (430)
                                                                                       ---------            ---------
          Net cash provided by operating activities ...............................       74,034               29,973

INVESTING ACTIVITIES:
    Purchases of investments ......................................................     (106,047)             (25,424)
    Sales and maturities of investments ...........................................       40,598               45,444
    Acquisitions of property, plant and equipment .................................      (34,038)             (15,891)
    Sales of property, plant and equipment ........................................          588                    -
    Acquisitions, net of acquired cash and assumed liabilities ....................       (8,324)                   -
    Investment in unconsolidated affiliates .......................................       (3,707)                   -
    Repayment of loans by affiliates ..............................................        2,019                    -
    Other .........................................................................         (502)              (9,495)
                                                                                       ---------            ---------
          Net cash used in investing activities ...................................     (109,413)              (5,366)

FINANCING ACTIVITIES:
    Proceeds from issuance of common stock ........................................       16,656              100,792
    Proceeds from issuance of debt, net ...........................................      243,676                    -
    Payments of debt and capital lease obligations ................................      (14,068)            (102,798)
    Net cash allocated to Genzyme Tissue Repair ...................................           84              (13,977)
    Net cash allocated to Genzyme Molecular Oncology ..............................            -               (5,000)
    Other .........................................................................        1,370                    -
                                                                                       ---------            ---------
          Net cash provided by (used in) financing activities .....................      247,718              (20,983)

Effect of exchange rate changes on cash ...........................................       (1,855)              (1,657)
                                                                                       ---------            ---------
Increase in cash and cash equivalents .............................................      210,484                1,967
Cash and cash equivalents at beginning of period ..................................       66,276               77,220
                                                                                       ---------            ---------
Cash and cash equivalents at end of period ........................................    $ 276,760            $  79,187
                                                                                       =========            =========
</TABLE>




    The accompanying notes are an integral part of these unaudited, combined
                              financial statements.


                                      -6-
<PAGE>   7
                                 GENZYME GENERAL
                NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS

1.     BASIS OF PRESENTATION
       These unaudited, combined financial statements should be read in
       conjunction with the 1997 Genzyme 10-K/A and the financial statements and
       footnotes for both Genzyme General Division ("Genzyme General") and
       Genzyme Corporation and Subsidiaries ("Genzyme" or the "Company")
       included therein. Certain information and footnote disclosures normally
       included in financial statements prepared in accordance with generally
       accepted accounting principles have been condensed or omitted pursuant to
       the rules and regulations of the Securities and Exchange Commission.
       Certain items in the 1997 financial statements have been reclassified to
       conform with the 1998 presentation.

       The financial statements for the three and six months ended June 30, 1998
       and 1997 are unaudited but include, in management's opinion, all
       adjustments (consisting only of normally recurring accruals) necessary
       for a fair presentation of the results for the periods presented.

2.     FINANCIAL INFORMATION
       Financial information specific to Genzyme General is presented in these
       Genzyme General unaudited, combined financial statements. Accounting
       policies and financial information relevant to Genzyme, Genzyme General,
       Genzyme Tissue Repair Division ("GTR" or "Genzyme Tissue Repair") and
       Genzyme Molecular Oncology Division ("GMO" or "Genzyme Molecular
       Oncology"), collectively, are presented in the unaudited, consolidated
       financial statements of Genzyme.

3.     NEW ACCOUNTING PRONOUNCEMENTS
       For a discussion of new accounting pronouncements, see Note 2., "New
       Accounting Pronouncements", to Genzyme Corporation and Subsidiaries'
       Unaudited, Consolidated Financial Statements (the "Unaudited,
       Consolidated Financial Statements"), which is incorporated herein by
       reference.

4.     INVENTORIES (IN THOUSANDS)

<TABLE>
<CAPTION>
                                              June 30, 1998    December 31, 1997
                                              -------------    -----------------

              <S>                                <C>                <C>     
              Raw materials..................    $ 49,258           $ 48,149
              Work-in-process................      28,566             30,264
              Finished products..............      55,665             59,295
                                                 --------           --------
                  Total .....................    $133,489           $137,708
                                                 ========           ========
</TABLE>

5.     EQUITY LINE OF CREDIT
       In June 1998, the Board of Directors of Genzyme (the "Genzyme Board")
       increased the amount of the equity line of credit available from Genzyme
       General to GTR from $13.0 million to $50.0 million. Under the terms of
       the equity line, GTR may draw down funds as needed on a quarterly basis
       in exchange for shares of GTR Stock that are not outstanding but are
       issuable from time to time for the benefit of Genzyme General or its
       stockholders ("GTR Designated Shares").

6.     5.25% CONVERTIBLE SUBORDINATED NOTES
       The disclosures related to Genzyme's private placement in May 1998 of
       $250.0 million of 5.25% Convertible Subordinated Notes due June 1, 2005
       (the "GGD Notes"), are included in Note 5., "5.25% Convertible
       Subordinated Notes", to the Unaudited, Consolidated Financial Statements,
       which is incorporated herein by reference.

7.     MINORITY INTEREST
       The minority interest of $860,000 and $1,724,000 for the three and six
       months ended June 30, 1998, respectively, relate to the portion of the
       results of operations of ATIII, LLC, the joint venture between Genzyme
       and Genzyme Transgenics Corporation ("GTC"), that Genzyme does not
       record. There were no corresponding amounts in the prior periods.


                                      -7-
<PAGE>   8

                                 GENZYME GENERAL
                NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS

8.     REVOLVING CREDIT FACILITY
       In May 1998, Genzyme General repaid $13.0 million of borrowings
       allocated to it under Genzyme's $225.0 million revolving credit
       facility with a syndicate of commercial banks (the "Revolving Credit
       Facility"). See Note 4., "Revolving Credit Facility", to the Unaudited,
       Consolidated Financial Statements, which is incorporated herein by
       reference.
        
9.     NET INCOME PER SHARE
       The following table sets forth the computation of basic and diluted
       earnings per share (in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                                                      Three Months Ended           Six Months Ended
                                                                            June 30,                    June 30,
                                                                     ---------------------       ---------------------
                                                                        1998          1997          1998          1997
                                                                     -------       -------       -------       -------
       <S>                                                           <C>           <C>           <C>           <C>    
       Genzyme General:
        Net income attributable to GGD Stock-basic and diluted ...   $31,200       $23,283       $56,138       $44,521
                                                                     =======       =======       =======       =======

        Shares used in net income per common share-basic .........    78,524        76,065        78,223        75,856
        Effect of dilutive securities:
           Employee and director stock options ...................     2,152         2,060         2,291         2,320
           Warrants ..............................................         3             5             6             8
                                                                     -------       -------       -------       -------
        Dilutive potential common shares .........................     2,155         2,065         2,297         2,328
                                                                     -------       -------       -------       -------
        Shares used in net income per common share-diluted .......    80,679        78,130        80,520        78,184
                                                                     =======       =======       =======       =======

        Net income per common share - basic ......................   $  0.40       $  0.31       $  0.72       $  0.59
                                                                     =======       =======       =======       =======

        Net income per common share - diluted ....................   $  0.39       $  0.30       $  0.70       $  0.57
                                                                     =======       =======       =======       =======
</TABLE>


       Certain securities were not included in the computation of Genzyme
       General's diluted earnings per share for the three and six months ended
       June 30, 1998 and 1997. For the three months ended June 30, 1998 and
       1997, such securities include options to purchase 3,829,926 and 5,173,854
       shares of GGD Stock, respectively, outstanding during the periods then
       ended but with exercise prices greater than the average market price of
       GGD Stock during each respective period. For the three months ended June
       30, 1998, such securities also include (i) warrants to purchase 80,000
       shares of GGD Stock exercisable as of June 30, 1998 with an exercise
       price greater than the average market price of GGD Stock during the three
       months ended June 30, 1998; and (ii) 6,313,131 shares of GGD Stock
       reserved in May 1998 for issuance upon conversion of the GGD Notes which
       were not included in the computation because inclusion of such shares
       would have an anti-dilutive effect on Genzyme General's net income per
       share. For the six months ended June 30, 1998 and 1997, such securities
       include options to purchase 3,844,830 and 4,633,768 shares of GGD Stock,
       respectively, outstanding during the periods then ended but with exercise
       prices greater than the average market price of GGD Stock during each
       respective period. For the six months ended June 30, 1998, such
       securities also include (i) warrants to purchase 80,000 shares of GGD
       Stock exercisable as of June 30, 1998 with an exercise price greater
        

                                      -8-
<PAGE>   9
                                 GENZYME GENERAL
                NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS


9.     NET INCOME PER SHARE (CONTINUED)
       than the average market price of GGD Stock during the six months ended
       June 30, 1998; and (ii) 6,313,131 shares of GGD Stock reserved in May
       1998 for issuance upon conversion of the GGD Notes which were not
       included in the calculation because inclusion of such shares would have
       an anti-dilutive effect on Genzyme General's net income per share.

10.    COMPREHENSIVE INCOME
       Effective January 1, 1998, Genzyme General adopted Statement of Financial
       Accounting Standards No. 130, "Reporting Comprehensive Income" ("SFAS
       130"). SFAS 130 establishes standards for reporting and displaying
       comprehensive income and its components in a set of financial statements.
       SFAS 130 requires that all items recognized under accounting standards as
       components of comprehensive earnings be reported on one of the
       following: a statement of income and comprehensive income or a statement
       of stockholders' equity. Components of comprehensive income are net
       income and all other non-owner changes in equity such as the change in
       the cumulative translation adjustment. Presentation of comprehensive
       income for earlier periods is provided for comparative purposes. Genzyme
       presents such information related to Genzyme General in its statement of
       stockholders' equity on an annual basis and in a footnote in its
       quarterly reports. Comprehensive income for Genzyme General for the three
       and six months ended June 30, 1998 and 1997 is as follows (in thousands):
        

<TABLE>
<CAPTION>
                                                     Three Months Ended         Six Months Ended
                                                          June 30,                  June 30,
                                                   ----------------------    ---------------------
                                                      1998           1997      1998           1997
                                                   -------        -------   -------        -------
     <S>                                           <C>            <C>       <C>            <C>    
     Genzyme General:
        Net income ..............................  $31,200        $23,283   $56,138        $44,521
        Cumulative translation adjustment .......      542            117      (156)        (8,753)
        Unrealized gain (loss) on investments ...   (4,971)        (1,275)   (3,644)        (1,940)
                                                   -------        -------   -------        -------
        Comprehensive income.....................  $26,771        $22,125   $52,338        $33,828
                                                   =======        =======   =======        =======
</TABLE>


11.    SUBSEQUENT EVENTS
       On July 1, 1998, Genzyme General completed the sale of the primary assets
       of its research products business to TECHNE Corp. and its wholly-owned
       subsidiary, Research and Diagnostic Systems, Inc. (together, "TECHNE").
       On July 17, 1998, Genzyme General made an equity investment of
       approximately $14.0 million in Pharming Group N.V. ("Pharming") a Dutch
       publicly traded company. The disclosures related to the sale of the
       research product business assets and equity investment in Pharming are
       included in Note 9., "Subsequent Events" to the Unaudited, Consolidated
       Financial Statements, which is incorporated herein by reference.
        
                                      -9-
<PAGE>   10


GENZYME TISSUE REPAIR
COMBINED BALANCE SHEETS

<TABLE>
<CAPTION>
(UNAUDITED, AMOUNTS IN THOUSANDS)                                           JUNE 30,         DECEMBER 31,
- ---------------------------------------------------------------------------------------------------------
                                                                                1998                 1997
                                                                             -------              -------

<S>                                                                          <C>                  <C>    
                                     ASSETS

Current assets:
   Cash and cash equivalents ...........................................     $25,404              $21,120
   Short-term investments ..............................................       3,127               10,795
   Accounts receivable, net ............................................       2,929                2,221
   Inventories .........................................................       2,299                1,973
   Prepaid expenses and other current assets ...........................       1,185                  732
                                                                             -------              -------
     Total current assets ..............................................      34,944               36,841

Property, plant and equipment, net (Note 5) ............................       2,754               19,524
Other ..................................................................         230                  453
                                                                             -------              -------
     Total assets ......................................................     $37,928              $56,818
                                                                             =======              =======

                         LIABILITIES AND DIVISION EQUITY

Current liabilities:
   Accounts payable ....................................................     $ 1,130              $ 1,378
   Accrued expenses ....................................................       2,992                2,816
   Due to Genzyme General ..............................................       1,233                1,213
                                                                             -------              -------
     Total current liabilities .........................................       5,355                5,407

Long-term debt .........................................................      18,000               18,000
Convertible debenture, net .............................................      13,635               12,681
Other ..................................................................         452                  527
                                                                             -------              -------
     Total liabilities .................................................      37,442               36,615

Division equity ........................................................         486               20,203
                                                                             -------              -------
     Total liabilities and division equity .............................     $37,928              $56,818
                                                                             =======              =======
</TABLE>



    The accompanying notes are an integral part of these unaudited, combined
                             financial statements.


                                      -10-
<PAGE>   11


GENZYME TISSUE REPAIR
COMBINED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                    THREE MONTHS ENDED                  SIX MONTHS ENDED
(UNAUDITED, AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)              JUNE 30,                            JUNE 30,
- ------------------------------------------------------------------------------------------------------------------------------
                                                                    1998              1997              1998              1997
                                                                --------          --------          --------          --------
<S>                                                             <C>               <C>               <C>               <C>     
Revenues:
   Net service sales .......................................    $  4,345          $  2,654          $  7,956          $  4,641

Operating costs and expenses:
   Cost of services sold ...................................       3,776             3,135             7,010             5,991
   Selling, general and administrative .....................       6,007             6,204            12,320            12,658
   Research and development ................................       2,832             2,228             5,918             4,996
                                                                --------          --------          --------          --------
     Total operating costs and expenses ....................      12,615            11,567            25,248            23,645
                                                                --------          --------          --------          --------

Operating loss .............................................      (8,270)           (8,913)          (17,292)          (19,004)

Other income (expenses):
   Equity in loss of joint venture .........................      (1,697)           (1,827)           (3,628)           (3,416)
   Interest income .........................................         227               212               674               398
   Interest expense ........................................        (715)             (861)           (1,529)           (1,238)
                                                                --------          --------          --------          --------
     Other income (expenses) ...............................      (2,185)           (2,476)           (4,483)           (4,256)
                                                                --------          --------          --------          --------

Net loss ...................................................    $(10,455)         $(11,389)         $(21,775)         $(23,260)
                                                                ========          ========          ========          ========

Basic and diluted net loss per Genzyme Tissue Repair
common share:
   Net loss ................................................    $  (0.52)         $  (0.86)         $  (1.08)         $  (1.76)
                                                                ========          ========          ========          ========

Weighted average shares outstanding ........................      20,159            13,238            20,080            13,208
                                                                ========          ========          ========          ========
</TABLE>









     The accompanying notes are an integral part of these unaudited, combined
                             financial statements.


                                      -11-
<PAGE>   12


GENZYME TISSUE REPAIR
COMBINED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                       SIX MONTHS ENDED
(UNAUDITED, AMOUNTS IN THOUSANDS)                                                           JUNE 30,
- ------------------------------------------------------------------------------------------------------------
                                                                                       1998             1997
                                                                                   --------         --------
<S>                                                                                <C>              <C>     
OPERATING ACTIVITIES:
   Net loss ....................................................................   $(21,775)        $(23,260)
   Reconciliation of net loss to net cash used by operating activities:
     Depreciation and amortization .............................................      1,147            1,214
     Non-cash compensation expense .............................................         77               77
     Provision for bad debts ...................................................        257              135
     Accretion of debt discount ................................................        536              407
     Accrued interest/amortization on bonds ....................................        136                -
     Equity in net loss of joint venture .......................................      3,628            3,416
     Increase (decrease) in cash from working capital:
       Accounts receivable .....................................................       (965)            (739)
       Inventories .............................................................       (326)             366
       Prepaid expenses and other ..............................................       (453)             103
       Accounts payable and accrued expenses ...................................        253              803
       Due to Genzyme General ..................................................         20           (1,375)
                                                                                   --------         --------

         Net cash used by operating activities .................................    (17,465)         (18,853)

INVESTING ACTIVITIES:
   Investment in joint venture .................................................     (3,417)          (4,130)
   Sales and maturities of investments .........................................      7,539                -
   Purchase of property, plant and equipment ...................................       (108)            (183)
   Sale of property, plant and equipment .......................................     16,535              202
   Other .......................................................................         12             (487)
                                                                                   --------         --------

         Net cash provided (used) by investing activities ......................     20,561           (4,598)

FINANCING ACTIVITIES:
   Proceeds from issuance of common stock ......................................      1,347            1,144
   Proceeds from issuance of convertible debenture .............................          -           13,000
   Cash allocated (to) from Genzyme General ....................................        (84)          13,977
   Other .......................................................................        (75)               -
                                                                                   --------         --------

         Net cash provided by financing activities .............................      1,188           28,121
                                                                                   --------         --------

Increase in cash and cash equivalents ..........................................      4,284            4,670
Cash and cash equivalents at beginning of period ...............................     21,120           16,230
                                                                                   --------         --------
Cash and cash equivalents at end of period .....................................   $ 25,404         $ 20,900
                                                                                   ========         ========
</TABLE>








     The accompanying notes are an integral part of these unaudited, combined
                              financial statements.


                                      -12-
<PAGE>   13



                              GENZYME TISSUE REPAIR
                NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS

1.     BASIS OF PRESENTATION
       These unaudited, combined financial statements should be read in
       conjunction with the 1997 Genzyme 10-K/A and the financial statements and
       footnotes for both GTR and Genzyme included therein. Certain information
       and footnote disclosures normally included in financial statements
       prepared in accordance with generally accepted accounting principles have
       been condensed or omitted pursuant to the rules and regulations of the
       Securities and Exchange Commission.

       The financial statements for the three and six months ended June 30, 1998
       and 1997 are unaudited but include, in management's opinion, all
       adjustments (consisting only of normally recurring accruals) necessary
       for a fair presentation of the results for the periods presented.

2.     FINANCIAL INFORMATION
       Financial information specific to GTR is presented in these GTR
       unaudited, combined financial statements. Accounting policies and
       financial information relevant to Genzyme, Genzyme General, GTR and GMO,
       collectively, are presented in the Unaudited, Consolidated Financial
       Statements of Genzyme.

3.     NEW ACCOUNTING PRONOUNCEMENTS
       For a discussion of new accounting pronouncements, see Note 2., "New
       Accounting Pronouncements", to the Unaudited, Consolidated Financial
       Statements, which is incorporated herein by reference.

4.     INVENTORIES
       (In thousands)

                                             June 30, 1998    December 31, 1997
                                             -------------    -----------------
       Raw materials......................       $  308              $  243
       Work-in-process....................        1,991               1,730
                                                 ------              ------
            Total ........................       $2,299              $1,973
                                                 ======              ======

5.     TRANSFER OF FACILITY
       In June 1998, the Genzyme Board approved the transfer of one of GTR's
       manufacturing facilities, including land, building and equipment, to
       Genzyme General for cash of approximately $16.5 million. GTR recognized a
       gain of approximately $0.7 million from this transfer, which was charged
       to division equity in June 1998.

6.     REVOLVING CREDIT FACILITY
       The disclosures related to amounts borrowed by GTR under Genzyme's
       Revolving Credit Facility are included in Note 4., "Revolving Credit
       Facility", to the Unaudited, Consolidated Financial Statements, which is
       incorporated herein by reference.

7.     EQUITY LINE OF CREDIT
       In June 1998, the Genzyme Board increased the amount of the equity line
       of credit available from Genzyme General to GTR from $13.0 million to
       $50.0 million. Under the terms of the equity line, GTR may draw down
       funds as needed on a quarterly basis in exchange for GTR Designated 
       Shares.

8.     NET INCOME (LOSS) PER SHARE
       Note 6., "Net Income (Loss) per Share", to the Unaudited, Consolidated
       Financial Statements is incorporated herein by reference.


                                      -13-
<PAGE>   14

                              GENZYME TISSUE REPAIR
                NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS

9.     COMPREHENSIVE INCOME
       Effective January 1, 1998, GTR adopted SFAS 130, which establishes
       standards for reporting and displaying comprehensive income and its
       components in a set of financial statements. SFAS 130 requires that all
       items recognized under accounting standards as components of 
       comprehensive earnings be reported on one of the following: a statement 
       of income and comprehensive income or a statement of stockholders' 
       equity. Components of comprehensive income are net income and all other 
       non-owner changes in equity such as the change in the cumulative 
       translation adjustment. Presentation of comprehensive income for earlier 
       periods is provided for comparative purposes. Genzyme presents such
       information related to GTR in its statement of stockholders' equity on
       an annual basis and in a footnote in its quarterly reports.
       Comprehensive loss for GTR for the three and six months ended June 30,
       1998 and 1997 is as follows (in thousands):
        
<TABLE>
<CAPTION>
                                                          Three Months Ended                 Six Months Ended
                                                                June 30,                          June 30,
                                                       -------------------------         -------------------------
                                                           1998             1997             1998             1997
                                                       --------         --------         --------         --------
<S>                                                    <C>              <C>              <C>              <C>      
Genzyme Tissue Repair:
   Net loss ...................................        $(10,455)        $(11,389)        $(21,775)        $(23,260)
   Unrealized gain (loss) on investments ......               7                -                7                -
                                                       --------         --------         --------         --------
   Comprehensive loss..........................        $(10,448)        $(11,389)        $(21,768)        $(23,260)
                                                       ========         ========         ========         ========
</TABLE>

                                      -14-


<PAGE>   15


GENZYME MOLECULAR ONCOLOGY
COMBINED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                                    JUNE 30,       DECEMBER 31,
(UNAUDITED, AMOUNTS IN THOUSANDS)                                                       1998               1997
- ---------------------------------------------------------------------------------------------------------------

<S>                                                                                  <C>                <C>    
                                     ASSETS

Current assets:
  Cash and cash equivalents .....................................................    $ 4,132            $15,010
  Short-term investments ........................................................      5,657              5,170
  Other .........................................................................      1,285                823
                                                                                     -------            -------
   Total current assets .........................................................     11,074             21,003

Equipment, net ..................................................................        867                487

Long-term investments ...........................................................          -              1,049
Intangibles, net ................................................................     23,157             30,688
Investment in joint venture .....................................................          -                574
                                                                                     -------            -------
   Total assets .................................................................    $35,098            $53,801
                                                                                     =======            =======

                        LIABILITIES AND DIVISION EQUITY

Current liabilities:
  Accrued expenses ..............................................................    $ 1,434            $ 2,015
  Due to Genzyme General ........................................................      5,540              5,434
  Deferred revenue ..............................................................      1,103              1,583
  Other .........................................................................          -                 18
                                                                                     -------            -------
   Total current liabilities ....................................................      8,077              9,050

Long-term debt ..................................................................          -              5,000
Convertible debentures, net .....................................................     19,124             17,024
Note payable to Genzyme General .................................................      2,658              2,582
Deferred tax liability ..........................................................      5,184              6,509
Other ...........................................................................        512                170
                                                                                     -------            -------
   Total liabilities ............................................................     35,555             40,335

Division equity .................................................................       (457)            13,466
                                                                                     -------            -------

   Total liabilities and division equity ........................................    $35,098            $53,801
                                                                                     =======            =======
</TABLE>








    The accompanying notes are an integral part of these unaudited, combined
                             financial statements.


                                      -15-
<PAGE>   16


GENZYME MOLECULAR ONCOLOGY
COMBINED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                             THREE MONTHS ENDED             SIX MONTHS ENDED
(UNAUDITED, AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)                       JUNE 30,                       JUNE 30,
- -------------------------------------------------------------------------------------------------        -----------------------
                                                                              1998           1997            1998           1997
                                                                           -------        -------        --------        -------
<S>                                                                        <C>            <C>            <C>             <C>    
Total revenues .....................................................       $ 1,689        $     -        $  4,506        $     -

Operating costs and expenses:
 Cost of revenues ..................................................         1,102              -           2,323              -
 Selling, general and administrative ...............................         2,003            166           3,155            275
 Research and development ..........................................         2,228          1,031           5,523          1,549
 Amortization of intangibles .......................................         3,045            228           6,070            228
 Charge for in-process technology ..................................             -          7,000               -          7,000
                                                                           -------        -------        --------        -------
  Total operating costs and expenses ...............................         8,378          8,425          17,071          9,052
                                                                           -------        -------        --------        -------

Operating loss .....................................................        (6,689)        (8,425)        (12,565)        (9,052)

Other income (expenses):
 Equity in loss of joint venture ...................................          (534)             -            (978)             -
 Interest income ...................................................           204              -             484              -
 Interest expense ..................................................        (1,090)           (17)         (2,252)           (17)
                                                                           -------        -------        --------        -------
  Total other income (expenses) ....................................        (1,420)           (17)         (2,746)           (17)
                                                                           -------        -------        --------        -------
Loss before income taxes ...........................................        (8,109)        (8,442)        (15,311)        (9,069)

Tax benefit ........................................................           662             50           1,324             50
                                                                           -------        -------        --------        -------

Net loss ...........................................................       $(7,447)       $(8,392)       $(13,987)       $(9,019)
                                                                           =======        =======        ========        =======

Basic and diluted net loss per Genzyme Molecular
  Oncology common share:
  Net loss .........................................................       $ (1.90)                      $  (3.56)
                                                                           =======                       ========

Weighted average shares outstanding ................................         3,929                          3,929
                                                                           =======                       ========

Pro forma basic and diluted net loss per Genzyme Molecular
  Oncology common share:
  Pro forma net loss ...............................................                      $ (2.14)                       $ (2.30)
                                                                                          =======                        =======

Pro forma shares outstanding .......................................                        3,929                          3,929
                                                                                          =======                        =======
</TABLE>




    The accompanying notes are an integral part of these unaudited, combined
                             financial statements.


                                      -16-
<PAGE>   17


GENZYME MOLECULAR ONCOLOGY
COMBINED STATEMENTS OF CASH FLOWS

<TABLE>
<CAPTION>
                                                                                        SIX MONTHS ENDED
(UNAUDITED, AMOUNTS IN THOUSANDS)                                                            JUNE 30,
- ------------------------------------------------------------------------------------------------------------
                                                                                        1998            1997
                                                                                    --------         -------

<S>                                                                                 <C>              <C>     
Operating Activities:
Net loss .......................................................................    $(13,987)        $(9,019)
Reconciliation of net loss to net cash used by operating activities:
      Depreciation and amortization ............................................       6,280             228
      Charge for in-process technology .........................................           -           7,000
      Deferred tax benefit .....................................................      (1,324)              -
      Accretion of debt conversion feature .....................................       1,412               -
      Equity in loss of joint venture ..........................................         978               -
      Accrued interest/amortization of marketable securities ...................          87               -
      Non-cash compensation expense ............................................          57               -
      Non-cash purchase price adjustments ......................................         747               -
      Increase (decrease) in cash from working capital changes:
         Other current assets ..................................................         (61)               -
         Accrued expenses, deferred revenue and other liabilities ..............        (309)            (33)
         Due to Genzyme General ................................................         182             430
                                                                                    --------         -------
         Net cash used by operating activities .................................      (5,938)         (1,394)

INVESTING ACTIVITIES:
   Acquisition of PharmaGenics, Inc. net of acquired cash ......................           -               9
   Purchases of investments ....................................................      (2,057)              -
   Maturities of investments ...................................................       2,539               -
   Acquisitions of equipment ...................................................        (502)              -
                                                                                    --------         -------
         Net cash provided (used) by investing activities ......................         (20)              9

FINANCING ACTIVITIES:
   Allocation of debt from Genzyme General .....................................           -           5,000
   Repayments of debt and leases ...............................................      (5,018)
   Parent company investment, Genzyme General ..................................           -           1,394
   Other .......................................................................          98               -
                                                                                    --------         -------
         Net cash provided (used) by financing activities ......................      (4,920)          6,394
                                                                                    --------         -------

Increase (decrease) in cash and cash equivalents ...............................     (10,878)          5,009
Cash and cash equivalents at beginning of period ...............................      15,010               -
                                                                                    --------         -------
Cash and cash equivalents at end of period .....................................    $  4,132         $ 5,009
                                                                                    ========         =======
</TABLE>







    The accompanying notes are an integral part of these unaudited, combined
                             financial statements.


                                      -17-
<PAGE>   18


                           GENZYME MOLECULAR ONCOLOGY
               NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS

1.   BASIS OF PRESENTATION
     These unaudited, combined financial statements should be read in
     conjunction with the 1997 Genzyme 10-K/A and the financial statements and
     footnotes for both GMO and Genzyme included therein. Certain information
     and footnote disclosures normally included in financial statements prepared
     in accordance with generally accepted accounting principles have been
     condensed or omitted pursuant to the rules and regulations of the
     Securities and Exchange Commission. Certain items in the 1997 financial
     statements have been reclassified to conform with the 1998 presentation.

     The financial statements for the three and six months ended June 30, 1998
     and 1997 are unaudited but include, in management's opinion, all
     adjustments (consisting only of normally recurring accruals) necessary for
     a fair presentation of the results for the periods presented.

2.   FINANCIAL INFORMATION
     Financial information specific to GMO is presented in these GMO unaudited,
     combined financial statements. Accounting policies and financial
     information relevant to Genzyme, Genzyme General, GTR and GMO,
     collectively, are presented in the Unaudited, Consolidated Financial 
     Statements of Genzyme.

3.   NEW ACCOUNTING PRONOUNCEMENTS
     For a discussion of new accounting pronouncements, see Note 2., "New
     Accounting Pronouncements," to the Unaudited, Consolidated Financial
     Statements, which is incorporated herein by reference.

4.   REVOLVING CREDIT FACILITY
     In March 1998, GMO repaid the full $5.0 million allocated to it under the
     Revolving Credit Facility. See Note 4., "Revolving Credit Facility," to the
     Unaudited, Consolidated Financial Statements, which is incorporated herein
     by reference.

5.   DUE TO JOINT VENTURE
     Pursuant to the funding commitment provided in the Collaboration Agreement
     relating to StressGen/Genzyme LLC, the joint venture between GMO, StressGen
     Biotechnologies Corporation ("StressGen") and the Canadian Medical
     Discoveries Fund, Inc. ("CMDF"), Genzyme and StressGen are obligated to
     fund the operations of StressGen/Genzyme LLC in equal portions after the
     initial $10.0 million (Canadian) of funding of StressGen/Genzyme LLC has
     been expended. As a result of this funding commitment, GMO records 50% of
     the losses of StressGen/Genzyme LLC for financial statement purposes. As of
     June 30, 1998, GMO's portion of the cumulative losses of StressGen/Genzyme
     LLC exceeded its initial capital contribution of $0.7 million and GMO has
     recorded $0.5 million as a noncurrent liability due to the joint venture.

6.   REGISTRATION STATEMENT
     In April 1998, GMO filed with the Securities and Exchange Commission an
     amended registration statement on Form S-3 (which has not yet become
     effective) covering the initial public offering of 3,450,000 shares of GMO
     Stock (including 450,000 shares issuable upon exercise of the underwriters'
     over-allotment option).

7.   NET LOSS PER SHARE
     Note 6., "Net Income (Loss) Per Share," to the Unaudited, Consolidated
     Financial Statements is incorporated herein by reference.


                                      -18-
<PAGE>   19


                           GENZYME MOLECULAR ONCOLOGY
                NOTES TO UNAUDITED, COMBINED FINANCIAL STATEMENTS

8.   COMPREHENSIVE INCOME

     Effective January 1, 1998, GMO adopted SFAS 130, which establishes
     standards for reporting and displaying comprehensive income and its
     components in a set of financial statements. SFAS 130 requires that all
     items recognized under accounting standards as components of comprehensive
     earnings be reported on one of the following: a statement of income and
     comprehensive income or a statement of stockholders' equity. Components of
     comprehensive income are net income and all other non-owner changes in
     equity such as the change in the cumulative translation adjustment.
     Presentation of comprehensive income for earlier periods is provided for
     comparative purposes. Genzyme presents such information related to GMO in
     its statement of stockholders' equity on an annual basis and in a footnote
     in its quarterly reports. Comprehensive loss for GMO for the three and six
     months ended June 30, 1998 and 1997 is as follows (in thousands):

<TABLE>
<CAPTION>
                                                       Three Months Ended            Six Months Ended
                                                             June 30,                    June 30,
                                                      ---------------------       ---------------------
                                                         1998         1997            1998         1997
                                                      -------       -------       --------      ------- 

     <S>                                              <C>           <C>           <C>           <C>     
     Net loss.....................................    $(7,447)      $(8,392)      $(13,987)     $(9,019)
     Unrealized gain (loss) on investments........          2             -              7            -
                                                      -------       -------       --------      ------- 
     Comprehensive loss...........................    $(7,445)      $(8,392)      $(13,980)     $(9,019)
                                                      =======       =======       ========      =======
</TABLE>



                                      -19-
<PAGE>   20


GENZYME CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
(UNAUDITED, AMOUNTS IN THOUSANDS)                                                      JUNE 30,     DECEMBER 31,
- ----------------------------------------------------------------------------------------------------------------
                                                                                           1998             1997
                                                                                     ----------       ----------
<S>                                                                                  <C>              <C>       
                                       ASSETS

Current assets:
   Cash and cash equivalents .....................................................   $  306,296       $  102,406
   Short-term investments ........................................................       43,722           51,259
   Accounts receivable, net.......................................................      137,749          118,277
   Inventories ...................................................................      135,788          139,681
   Prepaid expenses and other current assets .....................................       20,074           17,361
   Deferred tax assets - current .................................................       27,973           27,601
                                                                                     ----------       ----------
     Total current assets ........................................................      671,602          456,585

Property, plant and equipment, net ...............................................      385,409          385,348

Long-term investments ............................................................      159,490           92,676
Intangibles, net of accumulated amortization .....................................      266,849          271,275
Deferred tax assets - noncurrent .................................................       30,844           29,479
Investment in equity securities ..................................................       26,730           30,047
Other ............................................................................       34,013           30,043
                                                                                     ----------       ----------
     Total assets ................................................................   $1,574,937       $1,295,453
                                                                                     ==========       ==========

                        LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
   Accounts payable ..............................................................   $   18,012       $   19,787
   Accrued expenses ..............................................................       71,065           72,103
   Income taxes payable ..........................................................       21,729           11,168
   Deferred revenue ..............................................................        1,103            1,800
   Current portion of long-term debt and capital lease obligations ...............       20,796              905
                                                                                     ----------       ----------
     Total current liabilities ...................................................      132,705          105,763

Long-term debt and capital lease obligations .....................................      103,167          140,978
Convertible debentures ...........................................................      282,759           29,298
Other ............................................................................        8,981            7,364
                                                                                     ----------       ----------
     Total liabilities ...........................................................      527,612          283,403

Stockholders' equity:
   Preferred Stock................................................................            -                -
   Genzyme General Division Common Stock, $.01 par value .........................          787              777
   Genzyme Tissue Repair Division Common Stock, $.01 par value ...................          203              199
   Genzyme Molecular Oncology Division Common Stock, $.01 par value ..............           39               39
   Treasury Stock - at cost ......................................................         (901)            (901)
   Additional paid-in capital - Genzyme General ..................................      911,403          895,340
   Additional paid-in capital - Genzyme Tissue Repair ............................      172,477          170,430
   Additional paid-in capital - Genzyme Molecular Oncology .......................       34,573           34,517
   Accumulated deficit ...........................................................      (55,466)         (76,346)
   Foreign currency translation adjustments ......................................      (12,605)         (12,449)
   Unrealized net gains (losses) on investments ..................................       (3,185)             444
                                                                                     ----------       ----------
     Total stockholders' equity ..................................................    1,047,325        1,012,050
                                                                                     ----------       ----------

     Total liabilities and stockholders' equity ..................................   $1,574,937       $1,295,453
                                                                                     ==========       ==========
</TABLE>




  The accompanying notes are an integral part of these unaudited, consolidated
                             financial statements.

                                      -20-

<PAGE>   21


GENZYME CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                       THREE MONTHS ENDED              SIX MONTHS ENDED
                                                                            JUNE 30,                        JUNE 30,
                                                                    ------------------------        ------------------------
(UNAUDITED, AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)             1998            1997            1998            1997
- ----------------------------------------------------------------------------------------------------------------------------
<S>                                                                 <C>             <C>             <C>             <C>     
Revenues:
    Net product sales ..........................................    $153,807        $131,636        $293,177        $259,792
    Net service sales ..........................................      18,627          16,949          36,871          33,692
    Revenue from research and development contracts ............       2,440           1,683           5,377           3,377
                                                                    --------        --------        --------        --------
        Total revenues .........................................     174,874         150,268         335,425         296,861

Operating costs and expenses:
    Cost of products sold ......................................      48,573          45,498          94,923          92,010
    Cost of services sold ......................................      12,425          12,114          24,255          24,286
    Selling, general and administrative ........................      55,907          47,047         108,483          94,373
    Research and development ...................................      27,016          21,592          52,567          41,684
    Amortization of intangibles ................................       6,093           3,392          12,065           6,588
    Charge for in-process technology ...........................           -           7,000               -           7,000
                                                                    --------        --------        --------        --------
      Total operating costs and expenses .......................     150,014         136,643         292,293         265,941
                                                                    --------        --------        --------        --------

Operating income ...............................................      24,860          13,625          43,132          30,920

Other income (expenses):
    Equity in net loss of unconsolidated affiliates ............      (6,318)         (2,610)        (11,598)         (4,269)
    Gain on affiliate sale of stock ............................       2,369               -           2,369               -
    Minority interest ..........................................         860               -           1,724               -
    Investment income ..........................................       5,287           2,806           8,934           5,310
    Interest expense ...........................................      (5,156)         (2,597)         (9,122)         (5,255)
                                                                    --------        --------        --------        --------
       Total other income (expenses) ...........................      (2,958)         (2,401)         (7,693)         (4,214)
                                                                    --------        --------        --------        --------

Income before income taxes .....................................      21,902          11,224          35,439          26,706
Provision for income taxes .....................................      (8,806)         (6,955)        (14,559)        (13,070)
                                                                    --------        --------        --------        --------
Net income .....................................................    $ 13,096        $  4,269        $ 20,880        $ 13,636
                                                                    ========        ========        ========        ========
</TABLE>








  The accompanying notes are an integral part of these unaudited, consolidated
                             financial statements.


                                      -21-
<PAGE>   22


GENZYME CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                       THREE MONTHS ENDED               SIX MONTHS ENDED
                                                                             JUNE 30,                        JUNE 30,
                                                                    ------------------------        ------------------------
(UNAUDITED, AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)             1998            1997            1998            1997
- ----------------------------------------------------------------------------------------------------------------------------
<S>                                                                 <C>             <C>             <C>             <C>     
Attributable to Genzyme General:
   Net income ...................................................     24,960          18,755          44,257          35,482
   Tax benefit allocated from Genzyme Tissue Repair .............      3,390           4,327           7,796           8,838
   Tax benefit allocated from Genzyme Molecular Oncology ........      2,850             201           4,085             201
                                                                    --------        --------        --------        --------
   Net income attributable to GGD Stock .........................   $ 31,200        $ 23,283        $ 56,138        $ 44,521
                                                                    ========        ========        ========        ========

   Per Genzyme General common share - basic:
     Net income .................................................   $   0.40        $   0.31        $   0.72        $   0.59
                                                                    ========        ========        ========        ========

   Weighted average shares outstanding ..........................     78,524          76,065          78,223          75,856
                                                                    ========        ========        ========        ========

   Per Genzyme General common and common equivalent share 
     - diluted:
     Net income .................................................   $   0.39        $   0.30        $   0.70        $   0.57
                                                                    ========        ========        ========        ========

   Adjusted weighted average shares outstanding .................     80,679          78,130          80,520          78,184
                                                                    ========        ========        ========        ========

Attributable to Genzyme Tissue Repair:
   Net loss .....................................................   $(10,455)       $(11,389)       $(21,775)       $(23,260)
                                                                    ========        ========        ========        ========

   Per GTR basic and diluted common share:
     Net loss ...................................................   $  (0.52)       $  (0.86)       $  (1.08)       $  (1.76)
                                                                    ========        ========        ========        ========

   Weighted average shares outstanding ..........................     20,159          13,238          20,080          13,208
                                                                    ========        ========        ========        ========

Attributable to Genzyme Molecular Oncology:
   Net loss .....................................................   $ (7,447)       $ (8,392)       $(13,987)       $ (9,019)
                                                                    ========        ========        ========        ========

   Per GMO basic and diluted common share:
     Net loss ...................................................   $(1.90)                         $  (3.56)
                                                                    ======                          ========

   Weighted average shares outstanding ..........................    3,929                             3,929
                                                                    ======                          ========

   Pro forma per GMO basic and diluted common share:
     Pro forma net loss .........................................                   $  (2.14)                       $  (2.30)
                                                                                    ========                        ========

   Pro forma weighted average shares outstanding ................                      3,929                           3,929
                                                                                    ========                        ========
</TABLE>









  The accompanying notes are an integral part of these unaudited, consolidated
                             financial statements.


                                      -22-
<PAGE>   23
GENZYME CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS

<TABLE>              
<CAPTION>         
                                                                         SIX MONTHS ENDED
(UNAUDITED, AMOUNTS IN THOUSANDS)                                            JUNE 30,
- --------------------------------------------------------------------------------------------
OPERATING ACTIVITIES:                                                      1998         1997
                                                                      ---------    ---------
<S>                                                                   <C>          <C>      
    Net income .....................................................  $  20,880    $  13,636
    Reconciliation of net income to net
     cash provided by operating activities:
       Depreciation and amortization ...............................     30,274       16,272
       Non-cash compensation expense ...............................        165            -
       Accrued interest/amortization on bonds ......................     (1,818)         578
       Non-cash purchase price adjustments .........................        747            -
       Provision for bad debts and inventory .......................      3,393        2,395
       Deferred income tax benefit .................................     (1,324)           -
       Equity in net loss of unconsolidated affiliates .............     11,598        4,269
       Gain on affiliate sale of stock .............................     (2,369)           -
       Minority interest in net loss of affiliates .................     (1,724)           -
       Accretion of debt conversion feature ........................      1,948          407
       Purchase of in-process research and development .............          -        7,000
       Other .......................................................        162          579
       Increase (decrease) in cash from working capital changes:
          Accounts receivable ......................................    (23,245)      (9,841)
          Inventories ..............................................      4,290      (12,828)
          Prepaid expenses and other current assets ................     (2,401)      (2,444)
          Accounts payable, accrued expenses and deferred revenue ..     10,055       (8,903)
                                                                      ---------    ---------
          Net cash provided by operating activities ................     50,631       11,120

INVESTING ACTIVITIES:
    Purchases of investments .......................................   (108,104)     (25,424)
    Sales and maturities of investments ............................     50,676       45,444
    Acquisitions of property, plant and equipment ..................    (18,148)     (16,074)
    Sale of property, plant and equipment ..........................        623          202
    Acquisitions, net of acquired cash and assumed liabilities .....     (8,324)           9
    Investment in joint ventures ...................................     (7,124)      (4,130)
    Repayment of loans by affiliates ...............................      2,019            -
    Other ..........................................................       (490)      (9,982)
                                                                      ---------    ---------
          Net cash used by investing activities ....................    (88,872)      (9,955)

FINANCING ACTIVITIES:
    Proceeds from issuance of common stock .........................     18,003      101,936
    Proceeds from issuance of debt, net ............................    243,676       13,000
    Payments of debt and capital lease obligations .................    (19,086)    (102,798)
    Other ..........................................................      1,393            -
                                                                      ---------    ---------
          Net cash provided by financing activities ................    243,986       12,138

Effect of exchange rate changes on cash ............................     (1,855)      (1,657)
                                                                      ---------    ---------
Increase in cash and cash equivalents ..............................    203,890       11,646
Cash and cash equivalents at beginning of period ...................    102,406       93,450
                                                                      ---------    ---------
Cash and cash equivalents at end of period .........................  $ 306,296    $ 105,096
                                                                      =========    =========
</TABLE>



  The accompanying notes are an integral part of these unaudited, consolidated
                             financial statements.


                                      -23-
<PAGE>   24



                      GENZYME CORPORATION AND SUBSIDIARIES
              NOTES TO UNAUDITED, CONSOLIDATED FINANCIAL STATEMENTS

1.     BASIS OF PRESENTATION
       These unaudited, combined financial statements should be read in
       conjunction with the 1997 Genzyme 10-K/A and the financial statements
       and footnotes for Genzyme included therein. Certain information and
       footnote disclosures normally included in financial statements prepared
       in accordance with generally accepted accounting principles have been
       condensed or omitted pursuant to the rules and regulations of the
       Securities and Exchange Commission. Certain items in the 1997 financial
       statements have been reclassified to conform to the 1998 presentation.
        
       The financial statements for the three and six months ended June 30, 1998
       and 1997 are unaudited but include, in management's opinion, all
       adjustments (consisting only of normally recurring accruals) necessary
       for a fair presentation of the results for the periods presented.

2.     NEW ACCOUNTING PRONOUNCEMENTS
       In April 1998, the Accounting Standards Executive Committee of the
       American Institute of Certified Public Accountants issued Statement of
       Position 98-5, "Accounting for the Costs of Start-Up Activities"
       ("SOP 98-5"). SOP 98-5 requires all costs of start-up activities (as
       defined by SOP 98-5) to be expensed as incurred. Genzyme has determined
       that adoption of SOP 98-5 will not have a material impact on its
       consolidated financial statements. 

       In June 1998, the Financial Accounting Standards Board issued Statement
       of Financial Accounting Standards No. 133, "Accounting for Derivative
       Instruments and Hedging Activities" ("SFAS 133"). SFAS 133 establishes
       accounting and reporting standards for derivative instruments, including
       certain derivative instruments embedded in other contracts (collectively
       referred to as "derivatives"), and for hedging activities. SFAS 133
       requires companies to recognize all derivatives as either assets or
       liabilities, with the instruments measured at fair value. The accounting
       for changes in fair value, gains or losses, depends on the intended use
       of the derivative and its resulting designation. The statement is
       effective for all fiscal quarters of fiscal years beginning after June
       15, 1999. Genzyme will adopt SFAS 133 by January 1, 2000. Genzyme is
       evaluating SFAS 133 to determine its impact on its consolidated financial
       statements.
        
3.     INVENTORIES (IN THOUSANDS)

                                               June 30, 1998   December 31, 1997
                                               -------------   -----------------

              Raw materials..................    $ 49,566           $ 48,392
              Work-in-process................      30,557             31,994
              Finished products..............      55,665             59,295
                                                 --------           --------
                         Total...............    $135,788           $139,681
                                                 ========           ========


4.     REVOLVING CREDIT FACILITY
       Genzyme has a Revolving Credit Facility with a syndicate of commercial
       banks administered by Fleet National Bank in the amount of $225.0
       million. Amounts drawn under this facility may be allocated to either
       Genzyme General, GTR or GMO. In March 1998, GMO repaid the full $5.0
       million of borrowings allocated to it under the Revolving Credit Facility
       and in June 1998, Genzyme General repaid $13.0 million of borrowings
       allocated to it under this facility. As of June 30, 1998, the Company had
       $100.0 million of debt outstanding under the Revolving Credit Facility,
       $82.0 million of which was allocated to Genzyme General and $18.0 million
       of which was allocated to GTR.


                                      -24-
<PAGE>   25


                      GENZYME CORPORATION AND SUBSIDIARIES
              NOTES TO UNAUDITED, CONSOLIDATED FINANCIAL STATEMENTS

5.     5.25% CONVERTIBLE SUBORDINATED NOTES 
       In May 1998, Genzyme completed the private placement of the GGD Notes.
       The GGD Notes bear interest at 5.25% per annum and interest is payable
       semi-annually on June 1 and December 1 of each year, commencing on
       December 1, 1998. The GGD Notes are convertible, at any time at or before
       maturity (unless previously redeemed), into shares of GGD Stock at a
       conversion price of $39.60 per share, subject to adjustment in certain
       events. The GGD Notes may not be redeemed prior to June 10, 2001 and are
       redeemable, subject to certain subordination provisions, on such date and
       thereafter at the option of Genzyme, as a whole or from time to time in
       part, at the following prices (expressed as percentages of the principal
       amount) plus accrued interest to, but not including, the redemption date:
       102.63% if redeemed on or before May 31, 2002, 101.75% if redeemed
       between June 1, 2002 and May 31, 2003; 100.88% if redeemed between 
       June 1, 2003 and May 31, 2004; and 100% if redeemed on or after
       June 1, 2004. 
        
6.     NET INCOME (LOSS) PER SHARE
       The following table sets forth the computation of basic and diluted
       earnings per share (in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                                                             Three Months Ended           Six Months Ended
                                                                                   June 30,                    June 30,
                                                                            ---------------------       ---------------------
                                                                               1998          1997          1998          1997
                                                                            -------       -------       -------       -------
       <S>                                                                  <C>           <C>           <C>           <C>    
       GENZYME GENERAL:
        Net income attributable to GGD Stock-basic and diluted ......       $31,200       $23,283       $56,138       $44,521
                                                                            =======       =======       =======       =======

        Shares used in net income per common share-basic ............        78,524        76,065        78,223        75,856
        Effect of dilutive securities:
           Employee and director stock options ......................         2,152         2,060         2,291         2,320
           Warrants .................................................             3             5             6             8
                                                                            -------       -------       -------       -------

        Dilutive potential common shares ............................         2,155         2,065         2,297         2,328
                                                                            -------       -------       -------       -------
        Shares used in net income per common share-diluted ..........        80,679        78,130        80,520        78,184
                                                                            =======       =======       =======       =======

        Net income per common share - basic .........................       $  0.40       $  0.31       $  0.72       $  0.59
                                                                            =======       =======       =======       =======

        Net income per common share - diluted .......................       $  0.39       $  0.30       $  0.70       $  0.57
                                                                            =======       =======       =======       =======
</TABLE>

       Certain securities were not included in the computation of Genzyme
       General's diluted earnings per share for the three and six months ended
       June 30, 1998 and 1997. For the three months ended June 30, 1998 and
       1997, such securities include options to purchase 3,829,926 and 5,173,854
       shares of GGD Stock, respectively, outstanding during the periods then
       ended but with exercise prices greater than the average market price of
       GGD Stock during each respective period. For the three months ended June
       30, 1998 such securities also include (i) warrants to purchase 80,000
       shares of GGD Stock exercisable as of June 30, 1998 with an exercise
       price greater than the average market price of GGD Stock during the three
       months ended June 30, 1998, and (ii) 6,313,131 shares of GGD


                                      -25-
<PAGE>   26
                      GENZYME CORPORATION AND SUBSIDIARIES
             NOTES TO UNAUDITED, CONSOLIDATED FINANCIAL STATEMENTS


6.     NET INCOME (LOSS) PER SHARE (CONTINUED)
       Stock reserved in May 1998 for issuance upon conversion of the GGD Notes
       which were not included in the computation because inclusion of such
       shares would have an anti-dilutive effect on Genzyme General's net income
       per share. For the six months ended June 30, 1998 and 1997, such
       securities include options to purchase 3,844,830 and 4,633,768 shares of
       GGD Stock, respectively, outstanding during the periods then ended but
       with exercise prices greater than the average market price of GGD Stock
       during each respective period. For the six months ended June 30, 1998,
       such securities also include (i) warrants to purchase 80,000 shares of
       GGD Stock exercisable as of June 30, 1998 with an exercise price greater
       than the average market price of GGD Stock during the six months ended
       June 30, 1998; and (ii) 6,313,131 shares of GGD Stock reserved in May
       1998 for issuance upon conversion of the GGD Notes which were not
       included in the calculation because inclusion of such shares would have
       an anti-dilutive effect on Genzyme General's net income per share.
        
       GTR:
         Basic net loss per GTR common share is the same as diluted net loss per
         GTR common share for each of the three and six months ended June 30,
         1998 and 1997. Certain securities were not included in the computation
         of GTR's diluted earnings per share for each of these periods because
         they would have an anti-dilutive effect due to GTR's net loss for the
         relevant period. For the three months ended June 30, 1998 and 1997,
         these securities include: (i) options to purchase 3,244,098 and
         2,382,203 shares, respectively, of GTR Stock; (ii) 822,508 and
         3,142,921 GTR Designated Shares, respectively; and (iii) 2,577,245
         shares of GTR Stock reserved for issuance upon conversion of a 5%
         convertible note due February 27, 2000 (the "GTR Note"). For the six
         months ended June 30, 1998 and 1997, these securities include: (i)
         options to purchase 2,977,643 and 2,438,621 shares, respectively, of
         GTR Stock; (ii) 828,141 and 2,550,611 GTR Designated Shares,
         respectively; and (iii) 2,577,245 shares of GTR Stock reserved for
         issuance upon conversion of the GTR Note.
        
       GMO:
         Historical loss per share information is presented for GMO for the
         three and six months ended June 30, 1998 but is omitted for the three
         and six months ended June 30, 1997 as there were no shares of GMO Stock
         outstanding prior to June 18, 1997. Pro forma net loss per share is
         disclosed for GMO for the three and six months ended June 30, 1997. The
         pro forma shares outstanding represent the shares issued to effect the
         merger of PharmaGenics, Inc. ("PharmaGenics") with and into Genzyme in
         June 1997.

         Basic net loss per GMO common share is the same as diluted net loss per
         GMO common share for the three and six months ended June 30, 1998. Pro
         forma basic net loss per Genzyme Molecular Oncology common share is the
         same as pro forma diluted net loss per share for the three and six
         months ended June 30, 1997. Certain securities were not included in the
         computation of GMO's diluted or pro forma diluted earnings per share
         for each of these periods because they would have an anti-dilutive
         effect due to GMO's net loss for the relevant period. These securities
         include for the three months ended June 30, 1998: (i) options to
         purchase 1,176,749 shares of GMO Stock; (ii) warrants to purchase 9,563
         shares of GMO Stock at $8.04 per share; (iii) 3,475,915 shares of GMO
         Stock reserved for issuance upon conversion of a 6% convertible note
         due August 28, 2002 (the "GMO Debentures"); and (iv) 6,000,000 shares
         of GMO Stock which are not outstanding but are issuable for the benefit
         of Genzyme General or its stockholders ("GMO Designated Shares"). For
         the six months ended June 30, 1998 and 1997, these securities include:
         (i) options to purchase 1,023,527 shares of GMO Stock; (ii) warrants to
         purchase 9,563 shares of GMO Stock at $8.04 per share; (iii) 3,475,915
         shares of GMO Stock reserved for issuance upon conversion of the GMO
         Debentures; and (iv) 6,000,000 GMO Designated Shares.
        

                                      -26-
<PAGE>   27

                      GENZYME CORPORATION AND SUBSIDIARIES
              NOTES TO UNAUDITED, CONSOLIDATED FINANCIAL STATEMENTS

7.     COMPREHENSIVE INCOME
       Effective January 1, 1998, Genzyme adopted SFAS 130, which establishes
       standards for reporting and displaying comprehensive income and its
       components in a set of financial statements. SFAS 130 requires that all
       items recognized under accounting standards as components of
       comprehensive earnings be reported on one of the following: a statement
       of income and comprehensive income, a statement of comprehensive income
       or a statement of stockholders' equity. Components of comprehensive
       income are net income and all other non-owner changes in equity such as
       the change in the cumulative translation adjustment. Presentation of
       comprehensive income for earlier periods is provided for comparative
       purposes. Genzyme presents such information in its statement of
       stockholders' equity on an annual basis and in a footnote in its
       quarterly reports. Comprehensive income for the three and six months
       ended June 30, 1998 and 1997, is as follows (in thousands):
        
<TABLE>
<CAPTION>
                                                                          Three Months Ended              Six Months Ended
                                                                               June 30,                        June 30,
                                                                       ------------------------        ------------------------
                                                                           1998            1997            1998            1997
                                                                       --------        --------        --------        --------
          <S>                                                          <C>             <C>             <C>             <C>     
          Consolidated:
             Net income ........................................       $ 13,096        $  4,269        $ 20,880        $ 13,636
             Cumulative translation adjustment .................            542             117            (156)         (8,753)
             Unrealized gain (loss) on investments .............         (4,962)         (1,275)         (3,630)         (1,940)
                                                                       --------        --------        --------        --------
             Comprehensive income (loss) .......................       $  8,676        $  3,111        $ 17,094        $  2,943
                                                                       ========        ========        ========        ========

          Genzyme General:
             Net income ........................................       $ 31,200        $ 23,283        $ 56,138        $ 44,521
             Cumulative translation adjustment .................            542             117            (156)         (8,753)
             Unrealized gain (loss) on investments .............         (4,971)         (1,275)         (3,644)         (1,940)
                                                                       --------        --------        --------        --------
             Comprehensive income ..............................       $ 26,771        $ 22,125        $ 52,338        $ 33,828
                                                                       ========        ========        ========        ========

          Genzyme Tissue Repair:
             Net loss ..........................................       $(10,455)       $(11,389)       $(21,775)       $(23,260)
             Unrealized gain (loss) on investments .............              7               -               7               -
                                                                       --------        --------        --------        --------
             Comprehensive loss ................................       $(10,448)       $(11,389)       $(21,768)       $(23,260)
                                                                       ========        ========        ========        ========

          Genzyme Molecular Oncology:
             Net loss ..........................................       $ (7,447)       $ (8,392)       $(13,987)       $ (9,019)
             Unrealized gain (loss) on investments .............              2               -               7               -
                                                                       --------        --------        --------        --------
             Comprehensive loss ................................       $ (7,445)       $ (8,392)       $(13,980)       $ (9,019)
                                                                       ========        ========        ========        ========
</TABLE>


8.     REGISTRATION STATEMENT
       In April 1998, GMO filed with the Securities and Exchange Commission an
       amended registration statement on Form S-3 (which has not yet become
       effective) covering the initial public offering of 3,450,000 shares of
       GMO Stock (including 450,000 shares issuable upon the exercise of the
       underwriters' over-allotment option).
        
9.     SUBSEQUENT EVENTS
       On July 1, 1998, Genzyme completed the sale of the primary assets of its
       research products business to TECHNE. The purchase price consisted of
       $24.8 million in cash, approximately 987,000 shares of TECHNE common
       stock, and royalties on TECHNE's biotechnology group sales for the next
       five years. Royalty income will be recorded as earned.
        
       On July 17, 1998, Genzyme made an equity investment in Pharming of
       approximately $14.0 million at NLG 33.33 per share for a total of 852,307
       shares of Pharming common stock. The investment will be accounted for
       under the cost method of accounting.


                                      -27-

<PAGE>   28



ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 1998

The following discussion is a summary of the key factors management considers
necessary in reviewing the Company's results of operations, liquidity and
capital resources.

GENZYME CORPORATION AND SUBSIDIARIES
Since the operating results of Genzyme and its subsidiaries reflect the combined
operations of Genzyme General, GTR and GMO, this discussion summarizes the key
factors management considers necessary in reviewing Genzyme's consolidated
results of operations. Detailed discussion and analysis of each division's
results of operations are provided below under separate headings.

RESULTS OF OPERATIONS

   GENZYME CORPORATION

     REVENUES
     Total revenues for the three and six months ended June 30, 1998 increased
     16% and 13% to $174.9 million and $335.4 million, respectively, from $150.3
     million and $296.9 million, respectively, in the corresponding periods of
     1997.

     Product revenues consist solely of sales by Genzyme General. Product
     revenues for the three months ended June 30, 1998 increased 17% to $153.8
     million from $131.6 million in the comparable period of 1997. For the six
     months ended June 30, 1998, product revenues increased 13% to $293.2
     million from $259.8 million in the same period of 1997. The increase during
     both periods was primarily due to the increased sales of Cerezyme[R]
     enzyme. 

     Service revenues consist primarily of genetic testing services performed by
     Genzyme General, sales of GTR's Carticel[TM] autologous cultured
     chondrocyte ("Carticel[TM] AuCC") and Epicel[SM] services as well as sales
     of GMO's SAGE[TM] differential gene expression technology ("SAGE[TM]")
     services. For the three months ended June 30, 1998, service revenues
     increased 10% to $18.6 million from $16.9 million for the corresponding
     period of 1997. Service revenues were $36.9 million for the six months
     ended June 30, 1998, an increase of 9% over service revenues of $33.7
     million for the six months ended June 30, 1997. Service sales increased for
     the three and six months ended June 30, 1998 due primarily to increased
     sales of both GTR's Carticel[TM] AuCC and Epicel[TM] services and the
     addition of sales of GMO's SAGE[TM] services in each period, offset in
     part by slight reductions in genetic testing service revenue in each
     period. GMO added $0.3 million and $1.2 million of service revenue in the
     three and six months ended June 30, 1998, respectively, for which there
     were no comparable amounts in the same periods of 1997.

     International sales as a percentage of total product and service sales for
     the three and six months ended June 30, 1998 increased to 41% in each such
     period from 37% for each of the corresponding periods of 1997. The
     increases in international sales in these periods are due primarily to
     increases in the combined international sales of Cerezyme[R] enzyme and
     Ceredase[R] enzyme of 27% in the three months ended June 30, 1998 and 29%
     in the six months ended June 30, 1998, as well as increased European sales
     of Carticel[TM] AuCC. 
     
     MARGINS AND OPERATING EXPENSES
     Gross margins for the quarters ended June 30, 1998 and 1997 were 65% and
     61%, respectively, and 64% and 60% for the six months ended June 30, 1998
     and 1997, respectively, primarily due to increased sales of Cerezyme[R]
     enzyme. Genzyme provides a broad range of health care products and
     services, 


                                      -28-
<PAGE>   29
     resulting in a range of gross margins depending on the particular market
     conditions of each product or service. Product margins for both the three
     and six months ended June 30, 1998 were 68% compared to 65% for each of the
     same periods of 1997. The increase in product margins in both periods is
     primarily due to increased sales volume of Cerezyme[R] enzyme. Service
     margins for the three months ended June 30, 1998 were 33%, as compared to
     29% for the three months ended June 30, 1997, and 34% for the six months
     ended June 30, 1998 as compared to 28% for the corresponding period of
     1997. The increase in service margins for the three and six month periods
     ended June 30, 1998 resulted primarily from increased service margins for
     GTR attributable to higher sales volume and related efficiencies in the
     manufacturing process of Carticel[TM] AuCC, the continued consolidation of
     facilities and services relating to Genzyme General's genetic testing
     services and the addition of GMO's SAGE[TM] service sales for which there
     were no comparable amounts in the corresponding periods of 1997.

     Selling, general and administrative ("SG&A") expenses and amortization of
     intangibles for the three months ended June 30, 1998 were $62.0 million as
     compared to $50.4 million for the same period in 1997, an increase of 23%.
     SG&A expenses and amortization of intangibles for the six months ended June
     30, 1998 increased 19% to $120.5 million from $101.0 million in the
     corresponding period of 1997. The increase for both periods was due
     primarily to increased staffing in support of the growth in several product
     lines, and GMO's amortization of intangibles in the three and six months
     ended June 30, 1998 of $3.0 million and $6.1 million, respectively, for
     which there were no comparable amounts in the same periods of last year.

     Research and development expenses for the three months ended June 30, 1998
     were $27.0 million compared to $21.6 million for the three months ended
     June 30, 1997, an increase of 25%, due primarily to additional research and
     development expenses resulting from (i) the consolidation of the results of
     ATIII LLC, the joint venture between Genzyme and GTC for the development
     and commercialization of transgenic recombinant human antithrombin III
     ("ATIII"), for which there were no comparable amounts in the corresponding
     period of 1997, and (ii) increased spending on GMO's SAGE[TM] services,
     gene therapy and drug discovery programs. For the six months ended June 30,
     1998, research and development expenses were $52.6 million compared to
     $41.7 million for the same period of 1997, an increase of 26%, due
     primarily to additional research and development expenses from the
     consolidation of the results of ATIII LLC for which there were no
     comparable amounts in the same period of 1997, increased spending on GMO's
     SAGE[TM] services, gene therapy and drug discovery programs and increases
     in GTR's research and development spending.

     OTHER INCOME AND EXPENSES 

     Other income and expenses for the three months ended June 30, 1998 was a
     net expense of $3.0 million compared to a net expense of $2.4 million in
     the three months ended June 30, 1997. The increase is primarily due to
     increased losses from unconsolidated affiliates. Equity in net loss of
     Genzyme's unconsolidated affiliates increased from $2.6 million for the
     three months ended June 30, 1997 to $6.3 million for the three months ended
     June 30, 1998. The change is primarily due to (i) increased losses from GTC
     and (ii) Genzyme's portion of the losses resulting from Genzyme's joint
     venture with GelTex Pharmaceuticals, Inc. ("GelTex") for the development
     and commercialization of RenaGel[R] non-absorbed phosphate binder ("RenaGel
     LLC") which was established on June 17, 1997. These losses were offset by a
     gain of $2.4 million on Genzyme's investment in GTC, due to issuance of
     GTC's Common Stock, which was recorded in the three months ended June 30,
     1998. For the three months ended June 30, 1998, Genzyme recorded minority
     interest of $0.9 million, representing GTC's portion of the results of
     ATIII LLC for the period then ended.

     Other income and expenses for the six months ended June 30, 1998 was a net
     expense of $7.7 million compared to a net expense of $4.2 million in the
     six months ended June 30, 1997. The increase is primarily due to increased
     losses from unconsolidated affiliates. Equity in net loss of Genzyme's
     unconsolidated affiliates increased from $4.3 million for the six months
     ended June 30, 1997 to $11.6 million for the six months ended June 30,
     1998. The change is primarily due to increased losses from GTC and
     Genzyme's portion of the losses of RenaGel LLC. These losses were offset in
     part by a gain of $2.4 million on Genzyme's investment in GTC, due to
     issuance of GTC's Common Stock, which was recorded in June 1998. For the
     six months ended June 30, 1998, Genzyme recorded minority interest in the
     results of ATIII LLC of $1.7 million, representing GTC's portion of the
     losses of the joint venture for the first six months of 1998.

     The tax provisions for the three and six months ended June 30, 1998 and
     1997 vary from the U.S. statutory tax rate because of the provision for
     state income taxes, nondeductible interest, the use of a foreign sales
     corporation to effect overseas sales, nondeductible amortization of
     intangibles, tax credits and Genzyme's share of the losses of
     unconsolidated subsidiaries. The effective tax rate increased slightly to
     40.2% and 41.1% for the three and six months ended June 30, 1998,
     respectively, from 38.4% and 38.9%, respectively, for the corresponding
     period in 1997 due to higher nondeductible intangible amortization and
     losses from unconsolidated subsidiaries.


                                      -29-
<PAGE>   30

   GENZYME GENERAL
     REVENUES
     Total revenues for the three and six months ended June 30, 1998 increased
     14% and 11% to $169.0 million and $323.1 million, respectively, from $147.6
     million and $292.2 million, respectively, in the corresponding periods of
     1997.

     Product revenues for the three and six months ended June 30, 1998 increased
     17% and 13% to $153.8 million and $293.2 million, respectively, from $131.6
     million and $259.8 million, respectively, in the comparable periods of
     1997.

     Revenues for the Therapeutics business unit consisted primarily of sales of
     Cerezyme[R] enzyme and Ceredase[R] enzyme and increased 25% and 24% to
     $102.5 million and $198.1 million for the three and six months ended June
     30, 1998, respectively, from $81.8 million and $160.4 million,
     respectively, in the corresponding periods in 1997 due to strong
     international sales and the market launch of Cerezyme[R] enzyme in Japan.
     Cerezyme[R] enzyme sales accounted for 83% of the combined revenues for the
     two products during the second quarter of 1998. Combined revenues for
     Cerezyme[R] enzyme and Ceredase[R] enzyme for the three and six months
     ended June 30, 1998 were $98.6 million and $192.1 million, respectively, as
     compared to $80.3 million and $156.7 million, respectively, for the same
     periods of 1997. Genzyme General's results of operations are highly
     dependent on these products, which together represented 64% and 66% of
     product sales for the three and six months ended June 30, 1998,
     respectively, compared to 61% and 60%, respectively, in the corresponding
     periods of last year. 

     Revenues for the Surgical Products business unit increased 2% to $29.0
     million in the three months ended June 30, 1998 from $28.4 million in the
     corresponding period of last year due primarily to increased sales of
     Seprafilm[R] bioresorbable membrane, offset in part by an 18% decrease in
     sales of fluid management products. During the quarter, Genzyme obtained
     reimbursement approval from the Japanese Ministry of Health and Welfare for
     the use of Seprafilm[R] bioresorbable membrane in gynecological surgery.
     Based on this approval, Genzyme General's marketing partner in Japan, Kaken
     Pharmaceutical Co., Ltd., can begin selling Seprafilm[R]. In addition,
     clinical trials in Japan of Seprafilm[R] for use in abdominal surgery are
     progressing, and Genzyme expects to file for reimbursement approval in
     Japan for this indication in late 1998 or early 1999. For the six months
     ended June 30, 1998, Surgical Products' revenues declined 4% to $54.5
     million from $57.0 million despite stronger sales of Seprafilm[R]
     bioresorbable membrane due primarily to a 16% reduction in sales of fluid
     management products in comparison to the same period of 1997.

     Revenues for the Diagnostics business unit increased 2% to $31.3 million
     for the three months ended June 30, 1998 from $30.7 million in the same
     period of last year. For the six months ending June 30, 1998, Diagnostics'
     revenues declined to $61.8 million from $62.3 million in the corresponding
     period of 1997 due primarily to a reduction in genetic testing revenues,
     offset in part by increased sales of diagnostic products.



                                      -30-
<PAGE>   31
     International sales as a percentage of total product and service sales for
     the three and six months ended June 30, 1998 increased to 42% in each such
     period from 37% for each of the corresponding periods of 1997. The increase
     in international sales for the three and six months ended June 30, 1998 is
     due primarily to increases in the international sales of Cerezyme[R]
     enzyme.

     MARGINS AND OPERATING EXPENSES
     Gross margins for the quarters ended June 30, 1998 and 1997 were 66% and
     63%, respectively, and 65% and 62% for the six months ended June 30, 1998
     and 1997, respectively, due primarily to increased Cerezyme[R] enzyme
     sales. Genzyme General provides a broad range of health care products and
     services, resulting in a range of gross margins depending on the particular
     market conditions of each product or service. Product margins for both the
     three and six months ended June 30, 1998 were 68% compared to 65% for each
     of the same periods of 1997. The increase in product margins in both
     periods is primarily due to increased sales volume of Cerezyme[R] enzyme.
     Genetic testing service margins for the three and six months ended June 30,
     1998 increased to 39% and 40%, respectively, in comparison to 37% for both
     of the corresponding periods of 1997, due primarily to the continued
     consolidation of facilities and services.

     SG&A expenses and amortization of intangibles for the three months ended
     June 30, 1998 were $51.2 million as compared to $44.0 million for the same
     period in 1997, an increase of 16%. SG&A expenses and amortization of
     intangibles for the six months ended June 30, 1998 increased 13% to $99.5
     million from $88.0 million in the corresponding period of 1997. The
     increase for both periods was due primarily to increased staffing in
     support of the growth in several product lines.

     Research and development expenses for the three months ended June 30, 1998
     were $21.1 million compared to $19.0 million for the three months ended
     June 30, 1997, an increase of 11%, due primarily to $2.5 million of
     additional research and development expenses resulting from the
     consolidation of the results of ATIII LLC and for which there were no
     comparable amounts in the same period of 1997. This increase was partially
     offset by a decrease in Genzyme General's research and development spending
     of $0.4 million. For the six months ended June 30, 1998, research and
     development expenses were $39.5 million compared to $36.3 million for the
     same period of 1997, an increase of 9%, due primarily to $5.0 million of
     research and development expenses resulting from the consolidation of the
     results of ATIII LLC for which there were no comparable amounts in the
     corresponding period of 1997, offset partially by a decrease in Genzyme
     General's research and development spending of $1.8 million.

     OTHER INCOME AND EXPENSES
     Other income and expenses for the three months ended June 30, 1998 was a
     net other income of approximately $647,000 compared to net other income of
     approximately $92,000 in the three months ended June 30, 1997. The increase
     is primarily due to increased interest income due to higher average cash
     balances, offset in part by increased losses from unconsolidated affiliates
     and increased interest expense. Equity in net loss of Genzyme's
     unconsolidated affiliates increased from $0.8 million in the three months
     ended June 30, 1997 to $4.1 million for the three months ended June 30,
     1998. The change is primarily due to increased losses from GTC and
     Genzyme's portion of the losses of RenaGel LLC, which was established on
     June 17, 1997. These losses were offset by a gain on Genzyme General's
     investment in GTC, due to issuance of GTC's Common Stock, of approximately
     $2.4 million which was recorded in the three months ended June 30, 1998.
     Interest expense for the three months ended June 30, 1998 increased to $3.4
     million from $1.7 million in the same period of 1997 due to additional
     interest expense recorded resulting from the issuance of the GGD Notes in
     May 1998. For the three months ended June 30, 1998, Genzyme recorded
     minority interest of $0.9 million, representing GTC's portion of the
     results of ATIII LLC for the period then ended.

     Other income and expenses for the six months ended June 30, 1998 was a net
     expense of approximately $464,000 compared to a net other income of
     approximately $59,000 in the six months ended June 30, 1997. The change is
     primarily due to increased losses from unconsolidated affiliates and
     increased interest expense, offset in part by increased interest income due
     to higher average cash balances. Equity in net loss of Genzyme's
     unconsolidated affiliates increased from $0.9 million for the six months
     ended June 30, 1997 to $7.0 million for the six months ended June 30, 1998.
     The change is primarily due to increased losses from GTC and Genzyme's
     portion of the losses of RenaGel LLC. These losses were offset by a $2.4
     million gain on Genzyme General's investment in GTC, due to issuance of
     GTC's common stock, 


                                      -31-


<PAGE>   32
     which was recorded in the three months ended June 30, 1998. Interest
     expense for the six months ended June 30, 1998 increased to $5.3 million
     from $4.0 million in the same period of 1997 due to additional interest
     expense recorded as a result of the issuance of the GGD Notes in May 1998.
     For the six months ended June 30, 1998 Genzyme recorded minority interest
     in the results of ATIII LLC of $1.7 million, representing GTC's portion of
     the losses of the joint venture for the first six months of 1998.

     The tax provisions for the three and six months ended June 30, 1998 vary
     from the U.S. statutory tax rate because of the provision for state income
     taxes, the use of a foreign sales corporation to effect overseas sales,
     nondeductible amortization of intangibles, tax credits and Genzyme
     General's share of the losses of unconsolidated subsidiaries. The effective
     tax rate for the three months ended June 30, 1998 was 37.9%, a slight
     decrease from 38.1% for the same period of 1997. For the three months ended
     June 30, 1998, tax benefits allocated from GTR and GMO of $3.4 million and
     $2.9 million, respectively, reduced Genzyme General's tax rate to 22.4% and
     in the corresponding period of 1997, tax benefits allocated from GTR and
     GMO of $4.3 million and $0.2 million, respectively, reduced Genzyme
     General's tax rate to 23.1%. The effective tax rate for the six months
     ended June 30, 1998 increased slightly to 38.6% from 38.4% in the same
     period of 1997. For the six months ended June 30, 1998, tax benefits
     allocated from GTR and GMO of $7.8 million and $4.1 million, respectively,
     reduced Genzyme General's tax rate to 22.1% and in the corresponding period
     of 1997, tax benefits allocated from GTR and GMO of $8.8 million and $0.2
     million, respectively, reduced Genzyme General's tax rate to 22.8%.

   GENZYME TISSUE REPAIR

     REVENUES
     Service revenues for the three and six months ended June 30, 1998 were $4.3
     million and $8.0 million, respectively, representing increases of 64% and
     71% over the same periods in 1997. Sales of Carticel[TM] AuCC were $2.5
     million and $5.0 million for the three and six months ended June 30, 1998
     as compared to $1.6 million and $2.7 million for the three and six months
     ended June 30, 1997, representing increases of 60% and 85%, respectively.
     The growth in Carticel[TM] AuCC sales is primarily attributable to
     increased market penetration and the number of orthopedic surgeons trained
     in the technique as well as an increase in reimbursement and policy
     coverage by insurance companies following approval by the FDA of GTR's
     biologics license application in August 1997 for Carticel[TM] AuCC (the
     "BLA"). Sales of the Epicel[TM] service increased 69% and 53% to $1.8
     million and $3.0 million in the three and six months ended June 30, 1998,
     respectively, from $1.1 million and $1.9 million in the same periods of
     1997, in each case due to improvements in marketing and reimbursement
     efforts.

     MARGINS AND OPERATING EXPENSES
     GTR's gross margins for the three and six months ended June 30, 1998 were
     13% and 12%, respectively, as compared to the three and six months ended
     June 30, 1997, when the cost of services sold exceeded revenues by 18% and
     29%, respectively. These improvements in service margins are primarily
     attributable to the higher sales volumes and efficiencies gained in the
     manufacturing process.

     SG&A expenses were $6.0 million and $12.3 million for the three and six
     months ended June 30, 1998, respectively, as compared to $6.2 million and
     $12.7 million in the comparable periods of last year, representing
     decreases of 3% in both periods. The decreases are attributable to
     decreased marketing costs for Carticel[TM] AuCC. GTR incurs direct SG&A
     charges as well as an SG&A charge, based on actual amounts incurred, from
     Genzyme General for SG&A work performed by Genzyme General on behalf of
     GTR. In the three and six months ended June 30, 1998, $1.7 million and $3.4
     million, respectively, of SG&A services were provided by Genzyme General as


                                      -32-

<PAGE>   33
     compared to $2.0 million and $4.1 million for the same periods of 1997.
     These changes were due to decreases in expenses incurred in connection with
     the marketing of Carticel[TM] AuCC and the costs incurred in the first
     quarter of 1997 related to filing of the BLA for Carticel[TM] AuCC with the
     FDA.

     Research and development expenses for the three and six months ended
     June 30, 1998 were $2.8 million and $5.9 million, respectively, compared to
     $2.2 million and $5.0 million in the comparable periods of 1997. The
     increases were primarily due to spending on Carticel[TM] AuCC. In the three
     and six months ended June 30, 1998, $2.3 million and $4.5 million,
     respectively, of research and development services were provided to GTR by
     Genzyme General, compared to $1.8 million and $3.7 million in the same
     periods of 1997 due to increased support for the various Carticel[TM]
     programs.

     OTHER INCOME AND EXPENSES
     Interest income was $0.2 million for both the three months ended June 30,
     1998 and June 30, 1997 and increased to $0.7 million for the six months
     ended June 30, 1998 from $0.4 million for the same period of 1997. These
     increases were due primarily to higher average cash balances during the
     first quarter of 1998.

     Interest expense was $0.7 million and $1.5 million for the three and six
     months ended June 30, 1998, respectively, as compared to $0.9 million and
     $1.2 million for the same periods of 1997. The changes in interest expense
     were the result of interest and accretion of the conversion feature related
     to the March 1997 addition of $13.0 million of debt from the GTR Note.

     On October 1, 1996, Diacrin/Genzyme LLC was established as a joint venture
     between GTR and Diacrin, Inc. to develop and commercialize products and
     processes using porcine fetal cells for the treatment of Parkinson's
     disease and Huntington's disease in humans. Under the terms of the joint
     venture agreement, GTR provided 100% of the initial $10.0 million of the
     funding requirements and will provide 75% of the next $40.0 million of
     funding requirements for products to be developed by the joint venture.
     Thereafter, all costs will be shared equally by the two parties. In the
     three and six months ending June 30, 1998, GTR provided $1.4 million and
     $3.4 million, respectively, of funding to, and realized net losses of $1.7
     million and $3.6 million, respectively, from the joint venture as compared
     to funding of $2.3 million and $4.1 million, respectively, and net losses
     of $1.8 million and $3.4 million, respectively, for the corresponding
     periods in 1997. The decreased funding is due primarily to the reduction of
     GTR's funding obligation of the expenses incurred by Diacrin/Genzyme LLC
     from 100% to 75%.

   GENZYME MOLECULAR ONCOLOGY

     REVENUES
     GMO recorded service revenues of $0.3 million and $1.2 million for the
     three and six months ended June 30, 1998, respectively. Service revenues
     consisted of SAGE[TM] service contracts primarily with third parties. GMO
     also recorded research and development revenues of $1.4 million and $3.3
     million in the three and six months ended June 30, 1998, respectively, as
     compared to no revenues in the corresponding periods in 1997. These
     revenues consisted of gene therapy research and development contracts with
     strategic partners and work performed on behalf of StressGen/Genzyme LLC.

     MARGINS AND OPERATING EXPENSES
     For the three and six months ended June 30, 1998, GMO recorded cost of
     revenues of $1.1 million and $2.3 million, respectively. There were no
     similar amounts in the corresponding periods in 1997. Cost of revenues
     consisted of work performed related to the development of gene therapies
     on behalf of StressGen/Genzyme LLC, as well as development efforts
     attributable to gene therapy and SAGE[TM] contracts with third parties.
        
     GMO recorded $2.0 million and $3.2 million of SG&A expenses in the three
     and six months ended June 30, 1998, respectively, as compared to $0.2 and
     $0.3 million in the comparable periods in 1997. The increases from 1997 are
     due primarily to increased administrative support corresponding with the
     growth of GMO's business in the areas of gene therapy and drug discovery.
     The increases are also attributable to legal fees related to patents.

     Research and development expenses incurred by GMO in the three and six
     months ended June 30, 1998 were $2.2 million and $5.5 million,
     respectively, compared to $1.0 million and $1.5 million in the same periods
     of 1997. The increases in research and development costs relate to
     increases in research personnel and other costs associated with the
     continued development of GMO's drug discovery, gene therapy, and SAGE[TM]
     programs.


                                      -33-
<PAGE>   34
     GMO's amortization of intangibles for the three and six months ended June
     30, 1998 were $3.0 million and $6.1 million, respectively, as compared to
     $0.2 million during the same periods in 1997. Amortization of intangibles
     is attributable to certain intangible assets acquired in connection with
     the acquisition of PharmaGenics on June 18, 1997.

     In the second quarter of 1997, GMO recorded a $7.0 million charge resulting
     from the value assigned to PharmaGenics programs which were still in the
     developmental stage and for which there was no alternative use. There were
     no similar amounts in 1998.

     OTHER INCOME AND EXPENSES
     Interest income and interest expense were $0.2 million and $1.1 million,
     respectively, for the three months ended June 30, 1998, and were $0.5
     million and $2.3 million, respectively, for the six months ended June 30,
     1998. In the comparable periods in 1997, GMO's interest expense was
     $17,000. The interest income results from higher average cash balances due
     to the issuance of the GMO Debentures. The interest expense consists of
     interest and the related accretion of the conversion feature of the GMO
     Debentures.

     On July 31, 1997, StressGen/Genzyme LLC was established as a joint venture
     among Genzyme, StressGen and CMDF to develop stress gene therapies for the
     treatment of cancer. GMO recorded an equity in the loss of
     StressGen/Genzyme LLC of $0.5 million and $1.0 million in the three and six
     months ended June 30, 1998, respectively.

     GMO recorded a tax benefit of $0.7 million and $1.3 million for the three
     and six months ended June 30, 1998, respectively, from the amortization of
     the deferred tax liability established upon the acquisition of
     PharmaGenics.

LIQUIDITY AND CAPITAL RESOURCES

   GENZYME CORPORATION AND SUBSIDIARIES 
     As of June 30, 1998, Genzyme had cash, cash equivalents, and short- and
     long-term investments of $509.5 million, an increase of $263.2 million from
     December 31, 1997. Operating and financing activities provided $50.6
     million and $244.0 million of cash, respectively, investing activities used
     $88.9 million and fluctuations in exchange rates caused a reduction in cash
     of $1.9 million. In the six months ended June 30, 1998, financing
     activities provided $18.0 million of cash proceeds from the exercise of
     stock options and $243.7 million from the issuance of debt, net of
     underwriters' fees and debt offering costs of approximately $6.3 million,
     and used $19.1 million for the repayment of debt and capital lease
     obligations. At June 30, 1998, $100.0 million was outstanding under the
     Revolving Credit Facility, of which $82.0 million was allocated to Genzyme
     General and $18.0 million was allocated to GTR. In the six months ended
     June 30, 1998, investing activities provided $2.0 million of cash from the
     repayment of loans by affiliates and $0.6 million from the sale of
     property, plant and equipment. Investing activities used $57.4 million of
     cash for the investment portfolio; $18.1 million of cash to fund capital
     expenditures; $7.1 million of cash to fund Genzyme's investments in joint
     ventures; $8.3 million of cash to fund acquisitions for the Diagnostics
     business unit's genetic testing services group; and $0.5 million to fund
     other noncurrent assets.

     In May 1998, Genzyme completed the private placement of the GGD Notes
     resulting in net proceeds (after giving effect to the initial purchasers'
     discount and offering costs) to Genzyme of $243.7 million. The GGD Notes
     bear interest at 5.25% per annum and interest is payable semi-annually on
     June 1 and December 1 of each year, commencing on December 1, 1998. The GGD
     Notes are convertible, at any time at or before maturity (unless previously
     redeemed) into shares of GGD Stock at a conversion price of $39.60 per
     share, subject to adjustment in certain events. The GGD Notes may not be
     redeemed prior to June 10, 2001 and are redeemable, subject to certain
     subordination provisions, on such date and thereafter at the option of
     Genzyme, as a whole or from time to time in part, at the following prices
     (expressed as percentages of the principal amount) plus accrued interest
     to, but not including, the redemption date: 102.63% if redeemed on or
     before May 31, 2002; 101.75% if redeemed between June 1, 2002 and May 31,
     2003; 100.88% if redeemed between June 1, 2003 and May 31, 2004; and 100%
     if redeemed on or after June 1, 2004. 

   GENZYME GENERAL
     As of June 30, 1998, Genzyme had cash, cash equivalents, and short- and
     long-term investments of $471.2 million, an increase of $278.0 million from
     December 31, 1997. Operating and financing activities provided $74.0
     million and $247.7 million of cash, respectively, investing activities used
     $109.4 million and fluctuations in exchange rates caused a reduction in
     cash of $1.9 million. In the six months ended June 30, 1998, financing
     activities provided 



                                      -34-

<PAGE>   35
     $16.7 million of cash proceeds from the exercise of stock options and
     $243.7 million from the issuance of the GGD Notes, net of underwriters'
     fees and debt offering costs of approximately $6.3 million, and used $14.1
     million for the repayment of debt and capital lease obligations. At June
     30, 1998, $82.0 million of funds allocated to Genzyme General under the
     Revolving Credit Facility remained outstanding. In the six months ended
     June 30, 1998, investing activities provided $2.0 million of cash from the
     repayment of loans by affiliates and $0.6 million from the sale of
     property, plant and equipment. Investing activities used a net of $65.4
     million of cash for the investment portfolio; $34.0 million of cash to fund
     capital expenditures; $3.7 million of cash to fund Genzyme's investments in
     joint ventures; $8.3 million of cash to fund acquisitions for the
     Diagnostics business unit's genetic testing services group; and $0.5
     million to fund other noncurrent assets.

     In May 1998, the GGD Notes and related cash proceeds, net of approximately
     $6.3 million of underwriters' fees and debt offering costs were allocated
     to Genzyme General.

     In June 1998, the Genzyme Board increased the amount of the equity line of
     credit available from Genzyme General to GTR from $13.0 million to $50.0
     million. Under the terms of the equity line, GTR may draw down funds as
     needed on a quarterly basis in exchange for GTR Designated Shares.

     Management of Genzyme General believes that its available cash, investments
     and cash flow from product and service sales will be sufficient to finance
     its planned operations and capital requirements for the foreseeable future.
     Although Genzyme General currently has substantial cash resources, it has
     committed to utilize a portion of its resources for certain purposes, such
     as completing the market introduction of Seprafilm[R] bioresorbable
     membrane in the United States and Europe and developing other products on
     behalf of a joint venture between Genzyme and Genzyme Development Partners,
     L.P. ("GDP"), and for making certain payments to third parties in
     connection with strategic collaborations. Genzyme General's cash resources
     will also be diminished upon repayment of amounts borrowed, plus accrued
     interest, under the Revolving Credit Facility and if Genzyme exercises its
     option to acquire the partnership interests in GDP using cash to pay some
     or all of the exercise price. In addition to these commitments, Genzyme
     historically has pursued strategic acquisitions and collaborations with
     complementary businesses as opportunities become available and expects to
     seek additional acquisitions and collaborations in the future. Further, to
     the extent the liabilities or contingencies of GTR and GMO affect Genzyme's
     resources or financial condition, such liabilities or contingencies could
     affect the financial condition or results of operations of Genzyme General.
     As a result of the foregoing, Genzyme may have to obtain additional
     financing. There can be no assurance that such financing will be available
     on terms reasonably acceptable to Genzyme, if at all.

   GENZYME TISSUE REPAIR
     As of June 30, 1998, GTR had cash, cash equivalents and short-term
     investments of $28.5 million, a decline of $3.4 million from December 31,
     1997. In the six months ended June 30, 1998, GTR used $17.5 million of cash
     for operations. Investing activities provided $20.6 million of cash which
     consisted of $16.5 million from the transfer of property to Genzyme General
     and $7.5 million from the sale and maturity of investments, offset by $3.4
     million used to fund GTR's investment in Diacrin/Genzyme LLC. Financing
     activities provided $1.2 million of cash which included $1.3 million of 
     cash proceeds from employee stock plans.

     As of June 30, 1998, $18.0 million of funds allocated to GTR in December
     1996 under the Revolving Credit Facility remained outstanding.

     Management of GTR believes its available cash and investments will be
     sufficient to finance planned operations and capital requirements through
     1998. In June 1998, the Genzyme Board increased the amount of the equity
     line of credit available from Genzyme General to GTR from $13.0 million to
     $50.0 million. Under the terms of the equity line, GTR may draw down funds
     as needed on a quarterly basis in exchange for GTR Designated Shares. The
     rate of exchange will be determined by dividing the draw down amount by the
     average market value of a share of GTR Stock during the 20 trading days
     prior to the date the funding is drawn down. Management of GTR does not
     anticipate that it will need to draw down funds from the equity line until
     1999. GTR may need to raise significant additional capital in order to
     continue operations at current levels beyond 1999. GTR's plans to raise
     additional capital include the consideration of the sale of additional
     equity securities, additional borrowings, strategic alliances with third
     parties to fund further development and marketing of Carticel(TM) AuCC and
     TGF[beta-2] for the treatment of chronic skin ulcers and other business
     transactions that would generate capital resources to assure continuation
     of GTR's operations and research programs. If these initiatives are not
     successful, GTR may be required to delay, scale back or eliminate certain
     of its programs, or to license third parties to commercialize technologies
     or products that GTR would otherwise undertake itself.


                                      -35-
<PAGE>   36
   GENZYME MOLECULAR ONCOLOGY
     As of June 30, 1998, GMO had cash, cash equivalents, and short- and
     long-term investments of $9.8 million, a decrease of $11.4 million from
     December 31, 1997. GMO used $5.9 million for operations. Financing
     activities used $4.9 million of cash, which was primarily the repayment of
     $5.0 million which had been allocated to GMO under the Revolving Credit
     Facility. GMO also has $5.0 million available under an equity line of
     credit (the "GMO Equity Line") from Genzyme General.

     Management of GMO currently believes that existing cash balances, revenues
     generated from SAGE[TM] agreements, committed research funding from
     collaborators and cash available for allocation to GMO from Genzyme General
     pursuant to the GMO Equity Line will enable GMO to maintain its current and
     planned operations through 1999. In April 1998, GMO filed with the
     Securities and Exchange Commission an amended registration statement (which
     has not yet become effective) on Form S-3 covering the initial public
     offering of 3,450,000 shares of GMO Stock (including 450,000 shares
     issuable upon exercise of the underwriters' over-allotment option). There
     can be no assurance, however, that the initial public offering of GMO Stock
     will be completed. Upon successful completion of the offering, the GMO
     Equity Line will terminate. Management of GMO anticipates that if the
     initial public offering is completed, the proceeds from the offering,
     together with GMO's existing cash balances, revenues from SAGE[TM]
     agreements and committed research funding from collaborators would be
     sufficient to fund GMO's operations through the end of 1999. Substantial
     additional funds will be required to complete development and
     commercialization of GMO's products and services (other than SAGE[TM]
     services). In addition, GMO's cash requirements may vary materially from
     those now planned as a result of numerous factors, including progress of
     GMO's research and development programs, achievement of milestones under
     strategic alliance arrangements, the ability of GMO to establish and
     maintain additional strategic alliances and licensing arrangements, the
     progress of development efforts of GMO's strategic partners, competing
     technological and market developments, the costs involved in enforcing
     patent claims and other intellectual property rights and the cost and
     timing of regulatory approvals. Insufficient funds may require GMO to
     delay, scale back or eliminate certain of its programs or to license third
     parties to commercialize technologies or products that GMO would otherwise
     undertake itself.

YEAR 2000

     Many computer systems experience problems handling dates beyond the year
     1999. Therefore, some computer hardware and software will need to be
     modified prior to the year 2000 in order to remain functional. The Company
     is assessing the internal readiness of its computer systems for handling
     the year 2000. The Company expects to implement successfully the systems
     and programming changes necessary to address year 2000 issues, and does not
     believe that the cost of such actions will have a material effect on the
     Company's results of operations or financial condition. There can be no
     assurance, however, that there will not be a delay in, or increased costs
     associated with, the implementation of such changes, and the Company's
     inability to implement such changes could have an adverse effect on future
     results of operations. 

NEW ACCOUNTING PRONOUNCEMENTS

     In April 1998, the Accounting Standards Executive Committee of the American
     Institute of Certified Public Accountants issued SOP 98-5. SOP 98-5
     requires all costs of start-up activities (as defined by the SOP) to be
     expensed as incurred. Genzyme has not assessed the impact of SOP 98-5 on
     its consolidated financial statements.

     In June 1998, the Financial Accounting Standards Board issued SFAS 133.
     SFAS 133 establishes accounting and reporting standards for derivative
     instruments, including certain derivative instruments embedded in other
     contracts (collectively referred to as derivatives), and for hedging
     activities. SFAS 133 requires companies to recognize all derivatives as
     either assets or liabilities, with the instruments measured at fair value.
     The accounting for changes in fair value, gains or losses, depends on the
     intended use of the derivative and its resulting designation. The statement
     is effective for all fiscal quarters of fiscal years beginning after June
     15, 1999. Genzyme will adopt SFAS 133 by January 1, 2000. Genzyme is
     evaluating SFAS 133 to determine its impact on its consolidated financial
     statements.

SUBSEQUENT EVENTS -- GENZYME GENERAL
     On July 1, 1998, Genzyme completed the sale of the primary assets of its
     research products business to TECHNE. The purchase price consisted of $24.8
     million in cash, approximately 987,000 shares of TECHNE common stock, and
     royalties on TECHNE's biotechnology group sales for the next five years.
     Royalty income will be recorded as earned.

     On July 17, 1998, Genzyme made an equity investment in Pharming Group N.V.,
     a Dutch publicly traded company, of approximately $14.0 million at NLG
     33.33 per share for a total of 852,307 shares of Pharming Group N.V. common
     stock. The investment will be accounted for under the cost method of
     accounting.

ITEM 3.  QUANTITATIVE AND QUALITATIVE ANALYSIS OF MARKET RISK

Not applicable.


                                      -36-
<PAGE>   37

                      GENZYME CORPORATION AND SUBSIDIARIES
                            FORM 10-Q, JUNE 30, 1998


PART II. OTHER INFORMATION

ITEM 2.  CHANGES IN SECURITIES AND USE OF PROCEEDS

     The information concerning the GGD Notes set forth in Part I, Item 2
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" in the second paragraph under the heading "Liquidity and Financial
Resources -- Genzyme Corporation and Subsidiaries" is incorporated herein by
reference. The GGD Notes were sold to Credit Suisse First Boston, Cowen &
Company and Goldman, Sachs & Co. (the "Initial Purchasers"). Genzyme believes
that the sale of the GGD Notes to the Initial Purchasers qualifies as a
transaction by an issuer not involving a public offering within the meaning of
Section 4(2) of the Securities Act (the "Act") based on the manner of offering
(a negotiated sale to a limited number of "qualified institutional buyers" (as
defined in Rule 501 of the Act) without general solicitation) and the
purchasers' financial status, investment experience and investment intent, as
represented to Genzyme.

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

         I. The Company held an annual meeting of stockholders on May 28, 1998.
         The following represents the results of the voting on proposals
         submitted to a vote of stockholders at such meeting:

            a.  Proposal to elect two directors for a term of office expiring 
                in 2001:

                Nominee
                -------
                Henry E. Blair                           Number of Votes
                                                   ---------------------------
                                                       For           Withheld
                                                   ----------       ----------
                GGD                                66,238,364        1,235,712
                GTR*                                5,906,226           67,270
                GMO**                                 207,634              410
                                                   ----------       ----------
                Total                              72,352,224        1,303,392


                Nominee
                -------
                Douglas A. Berthiaume                    Number of Votes
                                                   ---------------------------
                                                       For           Withheld
                                                   ----------       ----------
                GGD                                66,246,393        1,227,683
                GTR*                                5,907,360           66,135
                GMO**                                 208,044                0
                                                   ----------       ----------
                Total                              72,361,797        1,293,818


            b.  Proposal to amend the Company's 1990 Employee Stock Purchase
            Plan (the "1990 ESPP") to increase the number of shares of GGD Stock
            available for issuance under the 1990 ESPP by 250,000 shares.

<TABLE>
<CAPTION>
                           Number of           Number of      Number of Votes           Number of
                           Votes for         Votes Against      Abstaining           Broker Non-Votes
                          ----------         -------------    ---------------        ----------------
            <S>           <C>                  <C>                <C>                       <C>
            GGD           59,830,581           7,449,759          193,735                   -
            GTR*           5,034,170             907,261           32,065                   -
            GMO**            206,658                 876              509                   -
                          ----------           ---------          -------
            Total         65,071,409           8,357,896          226,309                   -
</TABLE>

            ----------------
            *   Represents the actual number of GTR shares voted multiplied by
                .33
            **  Represents the actual number of GMO shares voted multiplied by
                .25

                                      -37-

<PAGE>   38

                      GENZYME CORPORATION AND SUBSIDIARIES
                            FORM 10-Q, JUNE 30, 1997

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS (CONTINUED)

            c.  Proposal to amend the 1990 ESPP to increase the number of shares
            of GTR Stock available for issuance under the 1990 ESPP by 350,000
            shares.

<TABLE>
<CAPTION>
                           Number of           Number of      Number of Votes           Number of
                           Votes for         Votes Against      Abstaining           Broker Non-Votes
                          ----------         -------------    ---------------        ----------------
            <S>           <C>                  <C>                <C>                       <C>
            GGD           60,052,906           7,222,497          198,672                   -
            GTR*           5,136,999             802,094           34,402                   -
            GMO**            206,658                 876              509                   -
                          ----------           ---------          -------
            Total         65,396,563           8,025,467          233,583                   -
</TABLE>

            d.  Proposal to approve the Company's 1998 Director Stock Option
            Plan.

<TABLE>
<CAPTION>
                           Number of           Number of      Number of Votes           Number of
                           Votes for         Votes Against      Abstaining           Broker Non-Votes
                          ----------         -------------    ---------------        ----------------
            <S>           <C>                  <C>                <C>                       <C>
            GGD           47,532,455           17,759,999         2,181,621                 -
            GTR*           4,478,395            1,441,784            53,316                 -
            GMO**            205,715                2,195               132                 -
                          ----------           ----------          --------
            Total         52,216,565           19,203,978         2,235,069                 -
</TABLE>

            ----------------
            *   Represents the actual number of GTR shares voted multiplied by 
                .33
            **  Represents the actual number of GMO shares voted multiplied by
                .25 


ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

         (a)      Exhibits


                   4.1     Indenture, dated as of May 22, 1998, between Genzyme
                           and State Street Bank and Trust Company, as Trustee,
                           including the form of Note. Filed as Exhibit 4.3 to
                           Genzyme's Registration Statement on Form S-3 (File
                           No. 333-59513) and incorporated herein by reference. 

                   4.2     Registration Rights Agreement, dated as of May 19,
                           1998, among Genzyme, Credit Suisse First Boston
                           Corporation, Goldman, Sachs & Co. and Cowen &
                           Company. Filed as Exhibit 4.4 to Genzyme's
                           Registration Statement on Form S-3 (File No.
                           333-59513) and incorporated herein by reference.

                   4.3     Purchase Agreement, dated as of May 19, 1998, among
                           Genzyme, Credit Suisse First Boston Corporation,
                           Goldman, Sachs & Co. and Cowen & Company. Filed as
                           Exhibit 4.5 to Genzyme's Registration Statement on
                           Form S-3 (Filed No. 333-59513) and incorporated
                           herein by reference. 

                  10.1     Second Amendment to Credit Agreement dated as of
                           April 15, 1998 by and among Genzyme and those of
                           its subsidiaries party thereto, Fleet National Bank,
                           as Administrative Agent, BankBoston, as Documentation
                           Agent, and the lenders identified on the signature
                           pages thereto. Filed herewith.

                  27.1     Financial Data Schedules for Genzyme for the six
                           months ended June 30, 1998 (for EDGAR filing purposes
                           only). Filed herewith.

                  27.2     Financial Data Schedules for Genzyme for the six
                           months ended June 30, 1997 (for EDGAR filing purposes
                           only). Filed herewith.



         (b)      Report on Form 8-K

                  On May 20, 1998, Genzyme Corporation filed a Current Report on
                  Form 8-K to announce that it had entered into a purchase 
                  agreement for a private placement of $250.0 million aggregate
                  principal amount of the GGD Notes. 

                                      -38-
<PAGE>   39



                      GENZYME CORPORATION AND SUBSIDIARIES
                            FORM 10-Q, JUNE 30, 1998


                                   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.




                                    GENZYME CORPORATION


DATE: August 14, 1998               By: /s/ David J. McLachlan
                                        ---------------------------------------
                                        David J. McLachlan
                                        Duly Authorized Officer and
                                        Executive Vice President, Finance;
                                        Chief Financial Officer



                                      -39-
<PAGE>   40



                      GENZYME CORPORATION AND SUBSIDIARIES
                            FORM 10-Q, JUNE 30, 1998


                                  EXHIBIT INDEX


Exhibit
   No.                              Description                         Page No.
- -------                             -----------                         --------
  4.1         Indenture, dated as of May 22, 1998, between Genzyme
              and State Street Bank and Trust Company, as Trustee,
              including the form of Note. Filed as Exhibit 4.3 to
              Genzyme's Registration Statement on Form S-3 (File
              No. 333-59513) and incorporated herein by reference.
  
  4.2         Registration Rights Agreement, dated as of May 19,
              1998, among Genzyme, Credit Suisse First Boston
              Corporation, Goldman, Sachs & Co. and Cowen &
              Company. Filed as Exhibit 4.4 to Genzyme's
              Registration Statement on Form S-3 (File No.
              333-59513) and incorporated herein by reference.
  
  4.3         Purchase Agreement, dated as of May 19, 1998, among
              Genzyme, Credit Suisse First Boston Corporation,
              Goldman, Sachs & Co. and Cowen & Company. Filed as
              Exhibit 4.5 to Genzyme's Registration Statement on
              Form S-3 (Filed No. 333-59513) and incorporated
              herein by reference.

 10.1         Second Amendment to Credit Agreement dated as of
              April 15, 1998 by and among Genzyme and those of its
              subsidiaries party thereto, Fleet National Bank as
              Administrative Agent, BankBoston, as Documentation
              Agent, and the lenders identified on the signature
              pages thereto. Filed herewith.

 27.1         Financial Data Schedules for Genzyme for the six
              months ended June 30, 1998 (for EDGAR filing purposes
              only). Filed herewith.

 27.2         Financial Data Schedules for Genzyme for the six
              months ended June 30, 1997 (for EDGAR filing purposes
              only). Filed herewith.



                                      -40-




<PAGE>   1
                                                                    EXHIBIT 10.1

                      SECOND AMENDMENT TO CREDIT AGREEMENT

     SECOND AMENDMENT to Credit Agreement ("Second Amendment") dated as of April
15, 1998 among and between Genzyme Corporation (the "Company"); each of the
Subsidiaries of the Company identified under the caption "Subsidiary Guarantors"
on the signature pages hereto; each of the Lenders identified under the caption
"Lenders" on the signature pages hereto (each a "Lender" and collectively, the
"Lenders"); Fleet National Bank ("Fleet") as administrative agent for the
Lenders (the "Administrative Agent"); and BankBoston ("BankBoston") as
documentation agent for the Lenders (the "Documentation Agent").

     Reference is made to the Credit Agreement dated as of November 14, 1996, as
amended, among and between the Company, the Subsidiary Guarantors, the Lenders,
the Administrative Agent and the Documentation Agent, pursuant to which the
Lenders furnished to the Company a $225,000,000 revolving line of credit.
Capitalized terms used in this Second Amendment have the meanings given such
terms in the Credit Agreement, as amended hereby, except as provided otherwise 
herein.

     The Company has requested that the Credit Agreement be amended to establish
the basis for the issuance of subordinated debt by the Company and to amend
certain financial covenants. Under Section 12.5 of the Agreement, to be
effective, this Second Amendment must be signed by the Company, the
Administrative Agent and the Lenders constituting the Required Lenders.

1.   Amendment to Section 1.1 - (Certain Defined Terms). Section 1.1 of the
Credit Agreement is amended as follows:

     (a) The following definition of "Capital Stock" is added between the
definitions "Capital Lease Obligations" and "Cash Equivalents":

          "Capital Stock" shall mean capital stock of the Company that does not
          rank prior, as to the payment of dividends or as to the distribution
          of assets upon any voluntary or involuntary liquidation, dissolution
          or winding up of the Company, to shares of capital stock of any other
          class of the Company.

     (b) Intentionally omitted.

     (c) The definition of Consolidated Operating Income is deleted and the
following is substituted in place thereof:

          "Consolidated Operating Income" shall mean, for any period, the
          Consolidated Net Income of the Company for such period, provided,
          however, that, to the extent the following items have been included in
          determining Consolidated Net Income, they shall NOT be considered in
          computing Consolidated Operating Income: provision for income taxes,
          interest expense, equity in the operating results of unconsolidated
          subsidiaries (including partnerships, joint ventures and Affiliates
          but only to the extent that such results represent noncash,
          nonoperating


                                       1

<PAGE>   2
     items) and other non-operating, non-cash items including, but not limited 
     to, write-off of acquired technology or acquired, in-process research and 
     development which, in accordance with GAAP, must be charged to income.  
     Furthermore, all charges arising from the acquisition of Neozyme II 
     Corporation and/or Deknatel Snowden Pencer, Inc. which are included in the 
     determination of Consolidated Net Income for any period shall be excluded 
     from the computation of Consolidated Operating Income whether such charges 
     be of a cash or non-cash nature.

     (d)  The following definition of "Fundamental Change" is added between the 
definitions "Federal Funds Rate" and "GAAP":

     "Fundamental Change" shall mean any of the following:

     (i)  a "person" or "group" (within the meaning of Sections 13(d) and 
     14(d)(2) of the Securities Exchange Act of 1934, as amended (the "Exchange 
     Act")), becoming the "beneficial owner" (as defined in Rule 13d-3 under 
     the Exchange Act) of Voting Shares of the Company entitled to exercise 
     more than 50% of the total voting power of all outstanding Voting Shares 
     of the Company (including any right to acquire Voting Shares that are not 
     then outstanding of which such person or group is deemed the beneficial
     owner); or

     (ii) a change in the Board of Directors in which the individuals who
     constituted the Board of Directors at the beginning of the two-year period
     immediately preceding such change (together with any other director whose
     election by the Board of Directors or whose nomination for election by the
     shareholders of the Company was approved by a vote of at least two-thirds
     of the directors then in office who either were directors at the beginning
     of such period or whose election or nomination for election was previously
     so approved) cease for any reason to constitute a majority of the directors
     then in office; or

     (iii) any consolidation of the Company with, or merger of the Company into,
     any other Person, any merger of another Person into the Company, or any
     sale or transfer of all or substantially all of the assets of the Company
     to another Person (other than (w) a merger which does not result in any
     reclassification, conversion, exchange or cancellation of outstanding
     shares of Capital Stock, (x) a merger which is effected solely to change
     the jurisdiction of incorporation of the Company, (y) any consolidation
     with or merger of the Company into a Wholly Owned Subsidiary of the
     Company, or any sale or transfer by the Company of all or substantially all
     of its assets to one or more of its Wholly Owned Subsidiaries, in any one
     transaction or a series of transactions, provided, in any such case, that
     the resulting corporation or each such Wholly Owned Subsidiary assumes the
     Obligations under the Loan Documents; or (z) a merger or consolidation in
     which the holders of the Company's Voting Shares immediately prior to such
     event

                                       2
<PAGE>   3
          continue to hold more than 50% of the Voting Shares outstanding
          immediately after such event).

     (e) The definition of "Net Equity Proceeds" is deleted and the following is
substituted in place thereof:

          "Net Equity Proceeds" shall mean the aggregate amount of all cash
          payments and the fair market value of any non-cash consideration
          received by the Company and its Subsidiaries directly or indirectly in
          connection with any Investment made as a capital contribution to
          equity to the Company and its Subsidiaries including upon conversion
          of Subordinated Debt into equity of the Company or any Subsidiary;
          provided that Net Equity Proceeds shall be net of the amount of any
          legal expenses, commissions other fees and expenses paid by the
          Company and its Subsidiaries to any non-Affiliated person in
          connection with such Investment.

     (f) The definition of "Person" is deleted and the following is substituted
in place thereof:

          "Person" shall mean any individual, corporation, company, voluntary
          association, partnership, joint venture, trust, unincorporated
          organization or government (or any agency, instrumentality or
          political subdivision thereof) and shall include any syndicate or
          group which would be deemed to be a "person" under Section 13(d)(3) of
          the Exchange Act.

     (g) The definition of "Subordinated Debt" is deleted and the following is
substituted in place thereof:

          "Subordinated Debt" means (1) the Company's $13 million Convertible
          Note, issued February 28, 1997, (2) the Company's $20 million of
          Convertible Debentures, issued August 29, 1997, (3) unsecured
          Indebtedness of the Company or a Subsidiary of the Company in an
          aggregate principal amount outstanding at any time not in excess of
          $250,000,000 which, by its terms, is explicitly subordinated to the
          prior payment in full of the Obligations to at least the following
          extent: (a) no payments of principal of (or premium, if any) or
          interest on (or otherwise due in respect of) such Indebtedness may be
          permitted for so long as any Default or Event of Default in the
          payment of principal (or premium, if any) or interest on the Loans
          exists; (b) in the event that any other Default or Event of Default
          exists, upon notice by the Required Lenders, the Administrative Agent
          shall have the right to give notice to the Company and the holders of
          such Indebtedness (or agents therefor) of a payment blockage, and
          thereafter no payments of principal of (or premium, if any) or
          interest on (or otherwise due in respect of) such Indebtedness may be
          made for a period of 179 days from the date of such notice unless,
          prior to such time, such Default or Event of Default is cured or
          waived; provided, however, that only one such notice of a payment
          blockage shall be effective during any 365 consecutive day period and
          provided, further, that no such other Default or Event of Default that
          existed upon first delivery of such a notice shall be the basis for a
          subsequent notice of payment blockage unless such Default or Event of
          Default shall have been cured or waived for a


                                       3
<PAGE>   4
period of 180 consecutive days; (c) such Indebtedness may not (i) provide for
payments of principal of such Indebtedness at the stated maturity thereof or by
way of a sinking fund applicable thereto or by way of any mandatory redemption,
defeasance, retirement or repurchase thereof by the Company or any Subsidiary
(including any redemption, retirement or repurchase which is contingent upon
events or circumstances but not including any exchange, conversion or payment
with equity or other Subordinated Debt), in each case prior to the Revolving
Credit Commitment Termination Date (without giving effect to any potential
extension pursuant to Section 2.9) or (ii) permit redemption or other retirement
(including pursuant to an offer to purchase made by the Company or any
Subsidiary) of such other Indebtedness at the option of the holder thereof prior
to the Revolving Credit Commitment Termination Date (without giving effect to
any potential extension pursuant to Section 2.9) other than by conversion to
Capital Stock or other equity of the Company or other Subordinated Debt;
provided, however, in the case of either (i) or (ii), such Indebtedness may
provide for payment prior to the stated maturity of such Indebtedness if any
event which causes, or (with the giving of any notice or the lapse of time or
both) permits the holder or holders of such Indebtedness (or a trustee or agent
on behalf of such holder or holders) to cause such Indebtedness to become due,
or to be prepaid (whether by redemption, purchase, offer to purchase or
otherwise), prior to its stated maturity would also cause a Default or an Event
of Default (subject, however, to the limitations of clauses (a), (b), (d) and
(e) hereof); (d) the terms of such Indebtedness shall provide, to the extent not
prohibited in the Trust Indenture Act of 1939, as amended, that no action to
enforce the payment thereof or to exercise any remedy with respect thereto shall
occur unless the holders of such Indebtedness (or agents therefor) give the
Administrative Agent notice of such default and thereafter no such enforcement
action or exercise of remedies shall occur until 180 days shall have elapsed
from the date of such notice without the cure or waiver of such default,
provided that such standstill period shall continue for as long as a Default or
an Event of Default under clause (a) above exists; provided, further, however,
that the restrictions described in this clause (d) shall not apply if the event
which gives rise to the right to enforce such payment or exercise such remedy
triggers a Default or an Event of Default (subject, however, to the limitations
of clauses (a), (b), (c), and (e); and (e) such Indebtedness shall further
provide that, upon any bankruptcy, insolvency, liquidation or similar case or
proceeding relative to the Company or any of its Subsidiaries, or upon the
realization of any amounts by the holders of the Indebtedness (or the agents
therefor) resulting from an action under clause (d) above, the Obligations shall
first be paid in full to the Administrative Agent or such payment shall have
been provided for to the satisfaction of the Required Lenders before any payment
or distribution is made to or retained by the holders of the Indebtedness (or
the agents therefor), (4) any other Indebtedness of the Company or its
Subsidiaries, incurred after the date hereof, containing subordination terms,
which are specifically consented to in writing by the Required Lenders and (5)
any refinancing of Subordinated Debt incurred pursuant to subsections (1), (2),
(3) or (4), in which (x) the principal amount of Subordinated Debt resulting
from such refinancing does not exceed the sum of (i) the principal amount of the
Subordinated Debt so refinanced plus (ii) customary fees and expenses incurred
in connection with such refinancing and (y) the Indebtedness resulting from such
refinancing satisfies the criteria for Subordinated Debt hereunder."


                                       4

<PAGE>   5
     (h)  The following definition of "Voting Shares" is added between the 
definition of "U.S. Person" and "Wholly Owned Subsidiary":

          "Voting Shares" shall mean all outstanding shares of any class or 
series (however designated) of Capital Stock entitled to vote generally in the 
election of members of the Board of Directors of the Company.

2.  Amendment to Section 9.9(c). Section 9.9(c) is amended to delete the 
phrase "ratio of Consolidated Funded Debt to Consolidated EBITDA" as it appears 
on the second and third lines therein and to insert the phrase "ratio of (a) 
Consolidated Funded Debt less all cash and Cash Equivalents and Marketable 
Investments of the Company and its Consolidated Subsidiaries in excess of 
$125,000,000; to (b) Consolidated EBITDA" in lieu thereof.

3.  Amendment to Section 10. Section 10 is amended to add the following 
subparagraph (l) after subparagraph (k) (which subparagraph (k) also is amended 
to add the word "or" at the end thereof):

          "(l) Any Fundamental Change shall occur;"

4.  Representations and Warranties. In order to induce the Agents and Lenders to
enter into this Second Amendment, the Company makes the following
representations and warranties, all of which shall survive the execution and
delivery of this Second Amendment:

     (a)  Each of the Company and the Subsidiary Guarantors has all requisite
corporate, partnership or other power and authority to execute, deliver and
perform its obligations under this Second Amendment and under the Credit
Agreement, as amended hereby. This Second Amendment has been duly authorized,
executed and delivered by the Company and each Subsidiary Guarantor, and does
not conflict with, violate or result in a breach of or require any consent under
any applicable law, rule or regulation or any of the terms of the charter or
by-laws (or equivalent constitutional documents) of any Obligor, any agreement
or instrument to which the Company or any Subsidiary is a party or to which any
of them or their Property is bound or to which any of them is subject. This
Second Amendment and the Credit Agreement, as amended hereby, constitute the
legal, valid and binding obligation of each Obligor enforceable against each
Obligor in accordance with its terms.

     (b)  On the date hereof each of the representations and warranties in the 
Credit Agreement are true, accurate and complete in all material respects.

     (c)  Upon the execution and delivery of this Second Amendment, and the 
satisfaction of each of the conditions precedent set forth in Section 4 of this 
Second Amendment, no Default or Event of Default shall exist and be continuing.

5.  Conditions Precedent. The agreements contained herein and the amendments 
contemplated hereby shall become effective on the date (the "Effective Date") 
when Company,


                                       5
<PAGE>   6
the Required Lenders, and the Administrative Agent shall have executed this 
Second Amendment and when each of the following conditions shall have been 
fulfilled:

     (a)  Execution of Documents, Etc.  This Second Amendment and any other 
agreements, documents and instruments to be executed and/or delivered in 
connection herewith (collectively the "Second Amendment Documents") shall have 
been duly and properly authorized and executed by: the Company, the 
Administrative Agent, and the Required Lenders and shall be in full force and 
effect on and as of the Effective Date of this Second Amendment and all 
representations and warranties of the Company hereunder shall continue to be 
true, accurate and complete.

     (b)  Proceedings; Receipt of Documents.  All requisite corporate action 
and proceedings of the Company and the Subsidiary Guarantors in connection with 
the execution and delivery of this Second Amendment and the other Second 
Amendment Documents shall be satisfactory in form and substance to the 
Administrative Agent and its counsel, and the Administrative Agent and its 
counsel shall have received all information and copies of all documents, 
including without limitation, records of requisite corporate action and 
proceedings which the Administrative Agent or its counsel may have requested in 
connection therewith, such documents where requested by the Administrative 
Agent or its counsel to be certified by appropriate persons or governmental 
authorities.

     (c)  Material Litigation. There shall be no pending or, to the best 
knowledge of the Company, threatened litigation with respect to the Company or 
any Subsidiary Guarantor before any court, arbitrator or governmental or 
administrative body or agency which challenges or relates to (i) the 
transactions contemplated hereby or (ii) the Loan Documents.

     (d)  Payment of Amendment Fee.  Upon approval by the Required Lenders, the 
Company shall pay to the Administrative Agent an amendment fee of five basis 
points on the Revolving Credit Commitment of each of the Lenders that responds 
either affirmatively or negatively in writing as required by the Administrative 
Agent's request for approval of this Second Amendment dated April 8, 1998 on or 
before 9:00 A.M. (E.S.T.) April 15, 1998 (the "Responding Lenders"). This 
amendment fee shall be paid over by the Administrative Agent only to the 
Responding Lenders in accordance with their respective Revolving Credit 
Commitments.

6.   Reaffirmation and Ratification of Existing Agreements, Etc.  The Company 
and the Subsidiary Guarantors each: (i) reaffirms and ratifies all the 
Obligations to the Agents and the Lenders, in respect of the Credit Agreement, 
as hereby amended, and the other Loan Documents, (ii) certifies that there are 
no defenses, offsets or counterclaims to such Obligations as of the date 
hereof, (iii) expressly acknowledges its continuing liability pursuant thereto, 
and (iv) agrees that each of the Credit Agreement, as amended hereby, and the 
other Loan Documents shall remain in full force and effect, enforceable against 
the Company and Subsidiary Guarantors in accordance with its terms.

7.   Miscellaneous.

                                       6
<PAGE>   7

        (a)   This Second Amendment may be executed on separate counterparts by
the parties hereto, each of which when so executed and delivered shall be an
original, but all of which shall constitute one and the same agreement.

        (b)   This Second Amendment and the rights and obligations of the
parties hereunder shall be construed in accordance with and be governed by the
laws of the Commonwealth of Massachusetts (without giving effect to the
conflict of law principles thereof).

        (c)   The headings of the several sections of this Second Amendment are
inserted for convenience only and shall not in any way affect the meaning or
construction of any provision of this Second Amendment.

        (d)   This Second Amendment, together with the other Second Amendment
Documents, embodies the entire agreement and understanding among the parties
relating to the subject matter hereof and supersedes all prior proposals,
negotiation, agreements and understandings relating to such subject matter.

        (e)   This Second Amendment, together with the other Second Amendment
Documents, shall be deemed to be Loan Documents under the Credit Agreement.

        (f)   EACH OF THE OBLIGORS, THE AGENTS AND THE LENDERS HEREBY
IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND
ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING
TO THIS SECOND AMENDMENT, OR THE TRANSACTIONS CONTEMPLATED HEREBY.

        (g)   The Company shall pay on demand the reasonable costs and
expenses, including, without limitation, reasonable attorneys' fees and
expenses incurred, or which may be incurred by the Agents or the Lenders in
connection with the negotiation, documentation, administration and enforcement
of this Second Amendment.


                                       7

<PAGE>   8
     IN WITNESS WHEREOF, this Second Amendment has been duly executed and 
delivered as a sealed instrument at Boston, Massachusetts as of the date first 
above written.

                                        THE COMPANY:

                                        GENZYME CORPORATION

                                        By: /s/ David J. McLachlan
                                            -----------------------------------
                                            Title: Executive Vice President -
                                                   Finance

                                        SUBSIDIARY GUARANTORS:

                                        DEKNATEL SNOWDEN PENCER, INC.

                                        By: /s/ David J. McLachlan
                                            -----------------------------------
                                            Title: Vice President and Treasurer

                                        GENZYME SURGICAL PRODUCTS
                                        CORPORATION f/k/a DSP WORLDWIDE, INC.

                                        By: /s/ John G. Schulte
                                            -----------------------------------
                                            Title: President

                                        ALLSTON LANDING LIMITED PARTNERSHIP
               
                                        By: Allston Landing Corporation,
                                              its General Partner

                                        By: /s/ David J. McLachlan
                                            -----------------------------------
                                            Title: Treasurer

                                        ADMINISTRATIVE AGENT:

                                        FLEET NATIONAL BANK

                                        By: /s/ Kimberly Martone
                                            -----------------------------------
                                            Title: Vice President

                                        DOCUMENTATION AGENT:

                                        BANKBOSTON

                                        By: /s/ [signature illegible]
                                            ------------------------------------
                                            Title: Vice President

                                       8
<PAGE>   9
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 FLEET NATIONAL BANK

$35,000,000.00                               By: /s/ Kimberly Martone
                                                -----------------------------
                                                Title: Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   10
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 BANKBOSTON        

$22,000,000.00                               By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   11
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:           BANK OF TOKYO-MITSUBISHI TRUST COMPANY

$13,000,000.00                         By: /s/ Michael J. Cronin
                                          -----------------------------
                                          Title: Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   12
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 CREDIT LYONNAIS NEW YORK BRANCH

$13,000,000.00                               By: 
                                                -----------------------------
                                                Title: 




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   13
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:           THE FUJI BANK, LIMITED, NEW YORK BRANCH

$13,000,000.00                         By: 
                                          -----------------------------
                                          Title: 




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   14
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 MELLON BANK, N.A.

$13,000,000.00                               By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   15
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 NATIONSBANK, N.A.

$13,000,000.00                               By: /s/ Michael Sylvester
                                                -----------------------------
                                                Title: Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   16
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 REPUBLIC NATIONAL BANK OF NEW YORK

$13,000,000.00                               By: /s/ Theodore R. Koemer
                                                -----------------------------
                                                Title: First Vice President


                                             By: /s/ Jean-Pierre F. Diels
                                                -----------------------------
                                                Title: Executive Vice President



            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   17
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 ABN AMRO BANK N.V.

$7,500,000.00                                By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President


                                             By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Senior Vice President



            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   18
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 BANK LEUMI USA

$7,500,000.00                                By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President


                                             By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President



            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   19
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 THE BANK OF NOVA SCOTIA

$7,500,000.00                                By: /s/ T.M. Pitcher
                                                -----------------------------
                                                Title: Authorized Signatory




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   20
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 CITIZENS BANK OF MASSACHUSETTS

$7,500,000.00                                By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President


            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   21
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 CORESTATES BANK, N.A.

$7,500,000.00                                By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   22
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 CREDIT SUISSE FIRST BOSTON

$7,500,000.00                                By: /s/ Robert N. Finnery 
                                                -----------------------------
                                                Title: Managing Director


                                             By: /s/ James P. Moran
                                                -----------------------------
                                                Title: Director



            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   23
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 KREDIETBANK, N.V.

$7,500,000.00                                By: 
                                                -----------------------------
                                                Title:


                                             By:
                                                -----------------------------
                                                Title: 



            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   24
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 LTCB TRUST CO.

$7,500,000.00                                By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Senior Vice President





            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   25
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 THE NORTHERN TRUST COMPANY

$7,500,000.00                                By: /s/ [signature illegible]
                                                -----------------------------
                                                Title: Vice President





            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   26
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 THE SAKURA BANK, LIMITED

$7,500,000.00                                By: /s/ Yasumasa Kikuchi 
                                                -----------------------------
                                                Title: Senior Vice President




            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   27
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 THE SANWA BANK, LIMITED

$7,500,000.00                                By: /s/ Takayoshi Futae
                                                -----------------------------
                                                Title: Deputy General Manager





            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]
<PAGE>   28
LENDERS:

     The undersigned Lender, with the Revolving Credit Commitment set forth 
herein, hereby enters into the foregoing Second Amendment to Credit Agreement 
dated April   , 1998.


Revolving Credit Commitment:                 THE SUMITOMO BANK, LIMITED,
                                               NEW YORK BRANCH

$7,500,000.00                                By: /s/ John C. Kissinger
                                                -----------------------------
                                                Title: Joint General Manager





            [Signature Page to Second Amendment to Credit Agreement
                             dated April   , 1998]

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR GENZYME CORPORATION FOR THE
THREE AND SIX MONTHS ENDED JUNE 30, 1998 AND AS OF JUNE 30, 1998 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS AS INCLUDED
IN THE FORM 10-Q FOR GENZYME CORPORATION DATED JUNE 30, 1998.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-30-1998
<EXCHANGE-RATE>                                      1
<CASH>                                         306,296
<SECURITIES>                                    43,722
<RECEIVABLES>                                  137,749
<ALLOWANCES>                                    21,152
<INVENTORY>                                    135,788
<CURRENT-ASSETS>                               671,602
<PP&E>                                         515,205
<DEPRECIATION>                                 129,796
<TOTAL-ASSETS>                               1,574,937
<CURRENT-LIABILITIES>                          132,705
<BONDS>                                              0
                                0
                                          0
<COMMON>                                         1,029
<OTHER-SE>                                   1,046,296
<TOTAL-LIABILITY-AND-EQUITY>                 1,574,937
<SALES>                                        330,048
<TOTAL-REVENUES>                               335,425
<CGS>                                           94,923
<TOTAL-COSTS>                                  119,178
<OTHER-EXPENSES>                               179,755
<LOSS-PROVISION>                                 3,234
<INTEREST-EXPENSE>                               9,122
<INCOME-PRETAX>                                 35,439
<INCOME-TAX>                                    14,559
<INCOME-CONTINUING>                             20,880
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    20,880
<EPS-PRIMARY>                                     0.40<F1>
<EPS-DILUTED>                                     0.39<F1>
<FN>
<F1>THE EARNING PER SHARE FIGURES PRESENTED ON THIS SCHEDULE REPRESENT EPS DATA
FOR NET INCOME ATTRIBUTABLE TO GENZYME GENERAL DIVISION COMMON STOCK ("GGD
STOCK"). GENZYME CORPORATION REPORTS EARNINGS BASED ON ITS THREE TRACKING
STOCKS, GGD STOCK, GENZYME TISSUE REPAIR COMMON STOCK ("GTR STOCK") AND GENZYME
MOLECULAR ONCOLOGY COMMON STOCK ("GMO STOCK"). THEREFORE, CONSOLIDATED EARNINGS
PER SHARE DATA IS NOT APPLICABLE. FOR THE SIX MONTHS ENDED JUNE 30, 1998,
GENZYME GENERAL HAD NET INCOME OF $56,138 AND NET INCOME PER SHARE OF GGD STOCK
- -- BASIC AND DILUTED OF $0.72 AND $0.70, RESPECTIVELY. NET LOSS FOR GTR FOR THE
SIX MONTHS ENDED JUNE 30, 1998, WAS $(21,775) OR $(1.08) PER SHARE OF GTR STOCK
- -- BASIC AND DILUTED. NET LOSS FOR GMO FOR THE SIX MONTHS ENDED JUNE 30, 1998,
WAS $(13,987) OR $(3.56) PER SHARE OF GMO STOCK -- BASIC AND DILUTED.
</FN>
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS RESTATED SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED FINANCIAL STATEMENTS OF GENZYME CORPORATION FOR THE THREE AND SIX
MONTHS ENDED JUNE 30, 1997 AND 1996 AND AS OF JUNE 30, 1997 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS AS INCLUDED IN THE FORM
10-Q FOR GENZYME CORPORATION DATED JUNE 30, 1997.
</LEGEND>
<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<EXCHANGE-RATE>                                      1
<CASH>                                         105,096
<SECURITIES>                                    47,243
<RECEIVABLES>                                  130,344
<ALLOWANCES>                                     9,400
<INVENTORY>                                    136,757
<CURRENT-ASSETS>                               443,870
<PP&E>                                         488,654
<DEPRECIATION>                                  98,207
<TOTAL-ASSETS>                               1,223,987
<CURRENT-LIABILITIES>                          113,725
<BONDS>                                              0
                                0
                                          0
<COMMON>                                           937
<OTHER-SE>                                     948,368
<TOTAL-LIABILITY-AND-EQUITY>                 1,223,987
<SALES>                                        259,792
<TOTAL-REVENUES>                               296,861
<CGS>                                           92,010
<TOTAL-COSTS>                                  116,296
<OTHER-EXPENSES>                               147,250
<LOSS-PROVISION>                                 2,395
<INTEREST-EXPENSE>                               5,255
<INCOME-PRETAX>                                 26,706
<INCOME-TAX>                                    13,070
<INCOME-CONTINUING>                             13,636
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    13,636
<EPS-PRIMARY>                                     0.59<F1>
<EPS-DILUTED>                                     0.57<F1><F2><F3>
<FN>
<F1>Genzyme Corporation has one class of common stock which currently consists
of three series of common stock -- Genzyme General Division Common Stock ("GGD
Stock"), Genzyme Tissue Repair Division Common Stock ("GTR Stock") and Genzyme
Molecular Oncology Division Common Stock ("GMO Stock"). Earnings (loss) per
share is reported separately for each series of common stock. Net income per
share for GGD Stock has been restated to conform to SFAS 128. Primary and fully
diluted net income per share of GGD Stock for the three and six months ended
June 30, 1997 was historically reported as $0.30 per share and $0.57 per
share. For the three and six months ended June 30, 1997, primary EPS and
fully diluted EPS for GGD Stock were $0.30 and $0.57, respectively.
<F2> Net loss attributable to GTR Stock for the three and six months ended
June 30, 1997, computed to conform to SFAS 128 is the same as net loss per share
of GTR Stock for the relevant periods as computed under APB 15 as the inclusion
of certain potentially dilutive shares in the dilutive loss per share
calculation for each such period would have been anti-dilutive. Net loss
attributable to GTR Stock for the three and six months ended June 30, 1997 was
$(0.86) per share and $(1.76) per share, respectively.
<F3>Pro forma net loss attributable to GMO Stock for the three and six months
ended June 30, 1997 computed to conform to SFAS 128 is the same as pro forma net
loss per share of GMO Stock computed under APB 15 as the inclusion of certain
potentially dilutive securities in the pro forma dilutive loss per share
calculation for each such period would have bee anti-dilutive. Pro forma net
loss attributable to GMO Stock was $(2.14) per share and $(2.30) per share,
respectively.
</FN>
        

</TABLE>


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