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UNITED STATES
SECURITIES AND EXCHANGE COMMISSIONWashington, D.C. 20549

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FORM 10-Q

(Mark One)

|ý | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the Quarterly Period Ended June 30, 2002

or

|o | 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 000-28324

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BIOTRANSPLANT INCORPORATED(Exact name of registrant as specified in its charter)

Delaware(State or Other Jurisdiction of Incorporation or Organization)

04-3119555(IRS Employer Identification No.)


Charlestown Navy Yard, Building 75, Third Avenue,
Charlestown, Massachusetts 02129(Address of Principal Executive Offices) (Zip Code)

(617) 241-5200(Registrant's Telephone Number, Including Area Code)

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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 ý    No o

The
number of shares outstanding of the Registrant's Common Stock as of August 8, 2002: 25,335,364 shares.

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BIOTRANSPLANT INCORPORATED AND SUBSIDIARIES  FORM 10-Q  FOR THE QUARTERLY PERIOD ENDED JUNE 30, 2002

INDEX

|                              |  |                                                                                                           |  | Page No.
|----------------------------- |  | --------------------------------------------------------------------------------------------------------- |  | --------
|PART I. FINANCIAL INFORMATION |  |                                                                                                          
|ITEM 1.                       |  | FINANCIAL STATEMENTS (Unaudited):                                                                         |  |         
|                              |  | Condensed Consolidated Balance Sheets as of June 30, 2002 and December 31, 2001                           |  | 3       
|                              |  | Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2002 and 2001 |  | 4       
|                              |  | Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2002 and 2001           |  | 5       
|                              |  | Notes to Condensed Consolidated Financial Statements                                                      |  | 6       
|ITEM 2.                       |  | MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS                     |  | 12      
|ITEM 3.                       |  | QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS                                               |  | 29      
|PART II. OTHER INFORMATION    |  |                                                                                                          
|ITEM 6.                       |  | EXHIBITS AND REPORTS ON FORM 8-K                                                                          |  | 30      
|SIGNATURES                    |  | 31                                                                                                       
|EXHIBIT INDEX                 |  | 32                                                                                                       

2

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PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS.

BIOTRANSPLANT INCORPORATED AND SUBSIDIARIES        CONDENSED CONSOLIDATED BALANCE SHEETS(Unaudited)

|                                           |                                                                                                                                                                  | June 30,
2002              |            | December 31,
2001 |           
|------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------- | ---------- | ----------------- | ----------
|ASSETS                                     |                                                                                                                                                                  |                            |            |                   |           
|Current assets:                            |                                                                                                                                                                  |                            |            |                   |           
|                                           | Cash and cash equivalents                                                                                                                                        |                            | $          | 6,646,654         |           
|                                           | Restricted cash                                                                                                                                                  |                            |            | 308,330           |           
|                                           | Short-term investments                                                                                                                                           |                            |            | 6,591,900         |           
|                                           | Accounts receivable, trade, net                                                                                                                                  |                            |            | 94,455            |           
|                                           | Accounts receivable from Immerge                                                                                                                                 |                            |            | 503,392           |           
|                                           | Inventory, net                                                                                                                                                   |                            |            | 273,349           |           
|                                           | Prepaid expenses and other current assets                                                                                                                        |                            |            | 639,219           |           
|                                           |                                                                                                                                                                  |                            |            |                   |           
|                                           |                                                                                                                                                                  | Total current assets       |            |                   | 15,057,299
|                                           |                                                                                                                                                                  |                            |            |                   |           
|Property and equipment, net                |                                                                                                                                                                  |                            | 4,096,300  |                   |           
|Other long-term assets                     |                                                                                                                                                                  |                            | 128,000    |                   |           
|Intangible assets, net                     |                                                                                                                                                                  |                            | 6,714,286  |                   |           
|Goodwill, net                              |                                                                                                                                                                  |                            | 2,621,188  |                   |           
|                                           |                                                                                                                                                                  |                            |            |                   |           
|TOTAL ASSETS                               |                                                                                                                                                                  | $                          | 28,617,073 |                   | $         
|                                           |                                                                                                                                                                  |                            |            |                   |           
|LIABILITIES AND STOCKHOLDERS' EQUITY       |                                                                                                                                                                  |                            |            |                   |           
|Current liabilities:                       |                                                                                                                                                                  |                            |            |                   |           
|                                           | Current portion of long-term debt                                                                                                                                |                            | $          | 852,345           |           
|                                           | Current obligation under capital lease                                                                                                                           |                            |            | 45,215            |           
|                                           | Accounts payable                                                                                                                                                 |                            |            | 980,212           |           
|                                           | Accrued expenses                                                                                                                                                 |                            |            | 1,961,997         |           
|                                           | Current portion of deferred revenue                                                                                                                              |                            |            | 858,864           |           
|                                           |                                                                                                                                                                  |                            |            |                   |           
|                                           |                                                                                                                                                                  | Total current liabilities  |            |                   | 4,698,633 
|                                           |                                                                                                                                                                  |                            |            |                   |           
|                                           | Long-term debt, net of current portion                                                                                                                           |                            |            | 3,417             |           
|                                           | Long-term obligation under capital leases, net of current portion                                                                                                |                            |            | 7,031             |           
|                                           | Deferred revenue, net of current portion                                                                                                                         |                            |            | 4,377,941         |           
|Stockholders' equity:                      |                                                                                                                                                                  |                            |            |                   |           
|                                           | Preferred stock, $.01 par value, authorized  2,000,000 shares; issued and outstanding  no shares                                                               |                            |            |                  |           
|                                           | Common stock, $.01 par value, authorized50,000,000 shares; issued and outstanding25,335,364 shares at June 30, 2002 and 21,272,672 shares at December 31, 2001 |                            |            | 253,354           |           
|                                           | Additional paid-in capital                                                                                                                                       |                            |            | 161,653,623       |           
|                                           | Deferred compensation                                                                                                                                            |                            |            | (204,478          | )         
|                                           | Accumulated deficit                                                                                                                                              |                            |            | (142,172,448      | )         
|                                           |                                                                                                                                                                  |                            |            |                   |           
|                                           |                                                                                                                                                                  | Total stockholders' equity |            |                   | 19,530,051
|                                           |                                                                                                                                                                  |                            |            |                   |           
|TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY |                                                                                                                                                                  | $                          | 28,617,073 |                   | $         
|                                           |                                                                                                                                                                  |                            |            |                   |           

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

3

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BIOTRANSPLANT INCORPORATED AND SUBSIDIARIES        CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS(Unaudited)

|                                                                                                    |                                     | Three Months Ended
June 30,    |             | Six Months Ended
June 30, |           
|--------------------------------------------------------------------------------------------------- | ----------------------------------- | ------------------------------ | ----------- | ------------------------- | ----------
|
|Revenues:                                                                                           |                                     |                                |             |                           |           
|                                                                                                    | License fees                        |                                | $           | 214,716                   |           
|                                                                                                    | Product revenues                    |                                |             | 178,015                   |           
|                                                                                                    |                                     |                                |             |                           |           
|                                                                                                    |                                     | Total revenues                 |             |                           | 392,731   
|                                                                                                    |                                     |                                |             |                           |           
|Expenses:                                                                                           |                                     |                                |             |                           |           
|                                                                                                    | Cost of product revenues            |                                |             | 127,507                   |           
|                                                                                                    | Research and development            |                                |             | 4,359,198                 |           
|                                                                                                    | General and administrative          |                                |             | 1,058,728                 |           
|                                                                                                    | Amortization of intangible assets   |                                |             | 392,856                   |           
|                                                                                                    | Stock-based compensation (1)        |                                |             | 591,870                   |           
|                                                                                                    | In-process research and development |                                |             |                          |           
|                                                                                                    | Loss from impairment                |                                |             | 17,956,858                |           
|                                                                                                    |                                     |                                |             |                           |           
|                                                                                                    |                                     | Total expenses                 |             |                           | 24,487,017
|                                                                                                    |                                     |                                |             |                           |           
|Operating loss                                                                                      |                                     |                                | (24,094,286 | )                         |           
|                                                                                                    |                                     |                                |             |                           |           
|                                                                                                    | Interest income                     |                                |             | 41,021                    |           
|                                                                                                    | Interest expense                    |                                |             | (29,903                   | )         
|                                                                                                    |                                     |                                |             |                           |           
|Net loss                                                                                            |                                     | $                              | (24,083,168 | )                         | $         
|                                                                                                    |                                     |                                |             |                           |           
|Net loss per common share, basic and diluted                                                        |                                     | $                              | (1.08       | )                         | $         
|                                                                                                    |                                     |                                |             |                           |           
|Weighted average common shares outstanding, basic and diluted                                       |                                     |                                | 22,210,151  |                           |           
|                                                                                                    |                                     |                                |             |                           |           
|                                                                                                    |                                     |                                |             |                           |           
|(1)    The following summarizes the departmental allocation of the stock-based compensation charge: |                                    
|Research and development                                                                            |                                     | $                              | 586,095     |                           | $         
|General and administrative                                                                          |                                     |                                | 5,775       |                           |           
|                                                                                                    |                                     |                                |             |                           |           
|                                                                                                    |                                     | Total stock-based compensation |             | $                         | 591,870   
|                                                                                                    |                                     |                                |             |                           |           

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

4

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BIOTRANSPLANT INCORPORATED AND SUBSIDIARIES        CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS(Unaudited)

|                                      |                                                                                      | Six Months Ended June 30,                           |                                          
|------------------------------------- | ------------------------------------------------------------------------------------ | --------------------------------------------------- | -----------------------------------------
|
|Cash flows from operating activities: |                                                                                      |                                                     |                                          
|                                      | Net loss                                                                             |                                                     | $                                        
|                                      | Adjustments to reconcile net loss to net cash used in operating activities:          |                                                     |                                          
|                                      |                                                                                      | Depreciation                                        |                                          
|                                      |                                                                                      | Amortization of intangible assets                   |                                          
|                                      |                                                                                      | Stock-based compensation                            |                                          
|                                      |                                                                                      | In-process research and development                 |                                          
|                                      |                                                                                      | Loss from impairment                                |                                          
|                                      |                                                                                      | Changes in current assets and liabilities:          |                                          
|                                      |                                                                                      |                                                     | Accounts receivable, trade               
|                                      |                                                                                      |                                                     | Accounts receivable from Immerge         
|                                      |                                                                                      |                                                     | Prepaid expenses and other current assets
|                                      |                                                                                      |                                                     | Inventories                              
|                                      |                                                                                      |                                                     | Accounts payable                         
|                                      |                                                                                      |                                                     | Accrued expenses                         
|                                      |                                                                                      |                                                     | Deferred revenue                         
|                                      |                                                                                      |                                                     |                                          
|                                      |                                                                                      | Net cash used in operating activities               |                                          
|                                      |                                                                                      |                                                     |                                          
|Cash flows from investing activities: |                                                                                      |                                                     |                                          
|                                      | Purchases of property and equipment                                                  |                                                     |                                          
|                                      | Purchases of short-term investments                                                  |                                                     |                                          
|                                      | Proceeds from maturities of short-term investments                                   |                                                     |                                          
|                                      | Decrease in investment in Stem Cell Sciences                                         |                                                     |                                          
|                                      | Cash paid for transaction costs, net of cash received in acquisition of Eligix, Inc. |                                                     |                                          
|                                      |                                                                                      |                                                     |                                          
|                                      |                                                                                      | Net cash provided by (used in) investing activities |                                          
|                                      |                                                                                      |                                                     |                                          
|                                      | Cash flows from financing activities:                                                |                                                     |                                          
|                                      |                                                                                      | Payments of long-term debt                          |                                          
|                                      |                                                                                      | Release of restricted funds                         |                                          
|                                      |                                                                                      | Payments of obligations under capital leases        |                                          
|                                      |                                                                                      | Proceeds from sale of common stock                  |                                          
|                                      |                                                                                      |                                                     |                                          
|                                      |                                                                                      |                                                     | Net cash provided by financing activities
|                                      |                                                                                      |                                                     |                                          
|                                      |                                                                                      | Net increase in cash and cash equivalents           |                                          
|                                      |                                                                                      | Cash and cash equivalents, beginning of period      |                                          
|                                      |                                                                                      |                                                     |                                          
|                                      |                                                                                      | Cash and cash equivalents, end of period            |                                          
|                                      |                                                                                      |                                                     |                                          
|                                      |                                                                                      | Supplemental disclosures and noncash transactions:  |                                          
|                                      |                                                                                      |                                                     | Interest paid during the period          
|                                      |                                                                                      |                                                     |                                          

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

5

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BIOTRANSPLANT INCORPORATED AND SUBSIDIARIES        NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(Unaudited)

1.    OPERATIONS AND BASIS OF PRESENTATION

BioTransplant Incorporated ("BioTransplant" or the "Company") was incorporated on March 20, 1990 in the state of Delaware. The Company discovers, develops
and commercializes therapeutics, therapeutic devices and therapeutic regimens designed to suppress undesired immune responses and enhance the body's ability to accept donor cells, tissues and organs.
The Company believes that its patented therapeutic regimens, either alone, in combination or with modified conventional therapies, have the potential to address significant unmet medical needs in
autoimmune diseases, cancer and transplantation.

During
the third quarter of 2001, the Company emerged from the development stage with sales of the Eligix HDM Cell Separation Systems, which received CE mark approval in Europe. However,
the Company is still devoting extensive efforts toward product research and development and raising capital. The Company is subject to a number of risks similar to those of other emerging
biotechnology companies, including risks related to: collaborative research and distribution partners, competition from substitute products and larger companies, its ability to develop and market
commercially usable products and obtain regulatory approval for its products under development, and its ability to obtain the substantial additional financing necessary to adequately fund the
development, commercialization and marketing of its product candidates. As described more fully in Note 8, the Company recorded a loss from impairment of $18.0 million in the accompanying
statement of operations for the three and six months ended June 30, 2002 related to the Eligix reporting unit.

The
accompanying unaudited condensed consolidated interim financial statements herein have been prepared by the Company, pursuant to the rules and regulations of the Securities and
Exchange
Commission ("SEC") and include, in the opinion of management, all adjustments, consisting of normal, recurring adjustments, necessary for a fair representation of the Company's financial position and
its interim period results. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United
States, have been condensed or omitted pursuant to such rules and regulations. The results for the interim periods presented are not necessarily indicative of results to be expected for the fiscal
year or any future period. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in the
Company's Annual Report on Form 10-K for the year ended December 31, 2001, as filed with the SEC.

The
Company incurred a net loss of approximately $30.7 million and $42.6 million for the six months ended June 30, 2002 and year ended December 31, 2001,
respectively, and had an accumulated deficit of approximately $142.2 million and $111.5 million as of June 30, 2002 and December 31, 2001, respectively. The Company has
funded these losses principally through equity financings. At June 30, 2002, the Company has approximately $13.5 million in cash, cash equivalents and short-term investments.
Management believes that these resources will be adequate to fund operations into the third quarter of 2003.

Certain
prior period amounts have been reclassified to be consistent with the current period's presentation.

6

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2.    NET LOSS PER COMMON SHARE

Net loss per common share is based on the weighted average number of common shares outstanding during the periods presented, in accordance with Financial
Accounting Standards Board ("FASB") Statement No. 128, "Earnings Per Share". Diluted net loss per common share is the same as basic net loss per common share as the inclusion of common stock
issuable pursuant to options and warrants would be antidilutive.

3.    IMMERGE BIOTHERAPEUTICS, INC.

In September 2000, the Company and Novartis Pharma AG entered into an agreement to combine their respective expertise in the field of xenotransplantation
into a newly-formed, independently-run company named Immerge BioTherapeutics AG ("Immerge"). Immerge began operations in January 2001. In return for contributing its technology and
an aggregate of $30.0 million in funding over three years beginning January 1, 2001, Novartis obtained a 67% ownership share of Immerge and the exclusive worldwide, royalty-bearing
rights to the development and commercialization of any xenotransplantation products resulting from Immerge's research. In return for contributing its technology, BioTransplant
obtained a 33% share of Immerge and will receive royalty payments from Novartis sales of xenotransplantation products, if any.

In
December 2000, Immerge formed a wholly-owned Delaware operating subsidiary, Immerge BioTherapeutics, Inc. Effective January 1, 2001, BioTransplant entered into a
contract research agreement with the Delaware subsidiary, under which BioTransplant has committed approximately 20 full-time employees to perform specified research activities exclusively
for the Delaware subsidiary and has agreed to provide administrative services and support at agreed upon rates. Amounts due BioTransplant under this agreement are being recorded as offsets to the
relevant BioTransplant expenses incurred. For the six months ended June 30, 2002 and 2001, BioTransplant recorded offsets to its expenses of approximately $2.6 million and
$3.0 million for research and development services, respectively, and approximately $488,000 and $488,000 for general and administrative services and support, respectively, provided under the
agreement. Of these amounts, approximately $503,000 is included as accounts receivable from Immerge on June 30, 2002.

4.    REVENUE RECOGNITION

Beginning in the third quarter of 2001, the Company generated product revenues in connection with the development and sale of the Company's Eligix Cell Separation
System product line. Product revenues are recognized upon shipment provided there is persuasive evidence of an arrangement, the fee is fixed or determinable, and collectibility of the related
receivable is reasonably assured. During the third quarter of 2001, the Company also received license fees and milestone payments in connection with the Gambro BCT distribution agreement (see
Note 9). The Company recognizes these payments as revenue on a straight line basis over the term of the distribution agreement in accordance with SEC Staff Accounting Bulletin No. 101,
"Revenue Recognition" ("SAB 101"). SAB 101 requires companies to recognize certain upfront non-refundable fees and milestone payments over the life of the related alliance when such fees
are received in conjunction with alliances which have multiple elements.

7

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5.    DEBT

In September 1997, the Company entered into a term note with a bank, whereby the Company could borrow up to $500,000 for certain equipment and fixtures
during a specified drawdown period, after which time the outstanding balance will become payable in 36 equal monthly principal installments plus interest. During 1999, the Company amended the term
note to extend the drawdown period and increase its availability to $1.0 million under the same conditions of the original term note. Borrowings under the term note bear annual floating
interest at the bank's prime rate (4.75% at June 30, 2002) during the drawdown period with an option to convert during the repayment period to an annual fixed rate at the three-month London
Interbank Offered Rate ("LIBOR") (1.89% at June 30, 2002) plus 2.25%. Borrowings under the term note are secured by equipment and fixtures purchased using the proceeds of the note. There were
$136,000 in borrowings outstanding under this term note at June 30,
2002. In order to provide its consent to the Eligix acquisition (see Note 7), a bank has required the Company to secure the term note with cash funds until the date the loan is paid off. The
Company transferred $540,000 into a restricted cash account during April 2001 in order to meet this requirement. As June 30, 2002, $308,000 of this amount is still restricted.

In
connection with the acquisition of Eligix, Inc. (see Note 7), the Company has become a co-borrower on two loan and security agreements. The first loan and
security agreement was entered into by Eligix in September 1997 and allows the Company to borrow up to $750,000. The minimum funding amount is $100,000 with a maximum of five loans. Loans under
the agreement bear interest at a fixed rate equal to the yield to maturity for the U.S. Treasury note having a term equivalent with the loan's term on the date of funding plus 300 basis points. The
loans are collateralized by certain equipment. There were $145,000 in borrowings outstanding under this term note at June 30, 2002. The second loan and security agreement was entered into by
Eligix in June 1999 and allows the Company to borrow up to $2,700,000. The minimum funding amount is $35,000. Each note will have a fixed term of 42 months. Loans under the agreement
bear interest at a fixed rate equal to the prime rate on the date of commencement plus the average interest rate of a similar term U.S Treasury note for the week preceding the date of commencement.
The loans are collateralized by certain equipment. There were $575,000 in borrowings outstanding under this term note at June 30, 2002. The weighted average interest rate on these Eligix loan
and security agreements outstanding was 13.29% at June 30, 2002.

6.    COMPREHENSIVE INCOME

Statement of Financial Accounting Standards ("SFAS") No. 130, "Reporting Comprehensive Income," establishes standards for reporting and display of
comprehensive income and its components (revenues, expenses, gains and losses) in a full set of general-purpose financial statements. There are no material differences between the Company's reported
income and comprehensive income for all periods presented.

7.    ELIGIX ACQUISITION

On May 15, 2001, the Company completed its acquisition of Eligix. The transaction was accounted for as a purchase and, accordingly, the purchase price of
$48.0 million for the acquisition of Eligix was allocated to the assets and liabilities of Eligix based upon their respective fair values with the excess of the purchase price over the fair
value of identified intangible and tangible net assets of $19.7 million allocated to goodwill. For the six months ended June 30, 2002, the Company recorded $786,000 in

8

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amortization expense related to intangible assets acquired in the purchase. Amortization of goodwill and intangible assets was $2.6 million for period ending December 31, 2001. As
described in Note 8, the Company has recorded a loss from impairment of $18.0 million for the three and six months ended June 30, 2002 related to the goodwill and intangible
assets acquired in the Eligix acquisition.

Of
the 5,610,000 shares of BioTransplant common stock issuable to Eligix securityholders in the merger, 493,327 shares issued to Eligix stockholders were deposited in an escrow account
to satisfy indemnification claims made by the Company within 15 months after the closing of the merger. Any indemnification escrow shares that, 15 months following the completion of the
merger, have not been used to satisfy indemnification claims made by BioTransplant and that are not subject to any unresolved claims for indemnification by BioTransplant, will be distributed to the
former Eligix stockholders.

Additionally,
BioTransplant assumed all outstanding Eligix stock options at the time of the merger and for the six months ended June 30, 2002, the Company recorded $69,000 in
stock-based compensation related to the vesting of stock options held by former employees and consultants of Eligix who became employees or consultants of BioTransplant.

Additionally,
certain employees of Eligix received an aggregate of 990,000 shares of BioTransplant common stock under the Eligix management equity incentive plan. These shares vest over
a 365-day period following the closing of the merger. Accordingly, at the merger date, $6,094,000 was recorded as deferred compensation. These management equity incentive plan shares are
being expensed over the vesting period of the shares. During the three and six months ended June 30, 2002, the Company amortized approximately $560,000 and $1,680,000, respectively of deferred
compensation related to research and development, in connection with the vesting of these shares.

8.    IMPAIRMENT OF GOODWILL AND OTHER INTANGIBLE ASSETS

In July 2001, the FASB issued SFAS No. 141, "Business Combinations" and No. 142, "Goodwill and Other Intangible Assets" (the "Statements"). Under the new
rules, goodwill and intangible assets deemed to have indefinite lives are no longer amortized but are subject to annual impairment tests in accordance with the Statements.

For
the Eligix acquisition, which was completed prior to June 30, 2001, the Company has applied the Statements beginning in the first quarter of 2002. The Company performed the
first of the required impairment tests of goodwill and intangible assets as of January 1, 2002 and determined that as of that date there was no impairment and no effect on earnings and
financial position of the Company. The adoption of the new standards did not impact the comparability of the financial results for the three months ended March 31, 2001 as no goodwill
amortization was recorded during that period. Goodwill subject to such impairment testing was $18,060,188 at January 1, 2002.

At
the end of the second quarter of 2002, management concluded that certain conditions and events were such that impairment testing was required to be performed again with respect to the
goodwill and intangible assets acquired in the Eligix acquisition. These conditions and events included continued unfavorable economic conditions and sales of the Company's HDM Cell Separation Systems
that were significantly below expectations, including quarter-to-quarter declines in sales. In addition, the Company has undergone two reductions in force to help reduce spending and conserve cash as
these

9

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negative events adversely affected the cash flow projections used to determine the fair value of the Eligix reporting unit and related intangible assets.

Fair
value measurements of the Eligix reporting unit and related intangible assets were estimated with the assistance of a third-party specialist utilizing an income approach. The report
of the third-party specialist is currently being finalized. Based on this analysis, BioTransplant recorded a loss from impairment related to goodwill and acquired technology of $18.0 million in
the accompanying statement of operations for the three and six months ended June 30, 2002. The impairment loss is an estimate and its finalization is subject to the completion of a third-party
specialist's assessment.

The
following table presents the changes in the carrying amounts of goodwill and intangible assets for the three-months ended June 30, 2002:

Goodwill

Intangible Assets

TotalBalances as of March 31, 2002

$
18,060,188

$
9,625,000

$
27,685,188Amortization expense





(392,856
)

(392,856
)Loss from impairment


(15,439,000
)

(2,517,858
)

(17,956,858
)Balances as of June 30, 2002

$
2,621,188

$
6,714,286

$
9,335,474


Acquired
intangible assets subject to amortization consist of capitalized acquired technology of $6.7 million, with an estimated useful life of six years, related to the Eligix
acquisition (see Note 7). As of June 30, 2002, accumulated amortization on acquired technology and goodwill was $1.8 million and $1.6 million, respectively. For the six months
ended June 30, 2002, amortization expense for intangible
assets subject to amortization was $786,000. The estimated annual amortization expense for intangible assets subject to amortization is $1.4 million for fiscal year 2002 and $1.1 million
for each of the next five fiscal years.

The
following table presents prior year reported amounts adjusted to eliminate the effect of goodwill amortization in accordance with SFAS No. 142 (in thousands, except per share
amounts):

Three Months Ended June 30,

Six Months Ended June 30,2002

2001

2002

2001Reported net loss

$
(24,083
)
$
(25,557
)
$
(30,701
)
$
(27,868
)Add back goodwill amortization





57





57Adjusted net loss

$
(24,083
)
$
(25,500
)
$
(30,701
)
$
(27,811
)Basic and diluted net loss per share:Reported net loss

$
(1.08
)
$
(1.26
)
$
(1.41
)
$
(2.12
)Goodwill amortization











Adjusted net loss

$
(1.08
)
$
(1.26
)
$
(1.41
)
$
(2.12
)


10

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9.    GAMBRO BCT DISTRIBUTION AGREEMENT

In August 2001, BioTransplant entered into an exclusive distribution agreement with Gambro BCT, a wholly-owned subsidiary of Gambro AB, for the
distribution of its Eligix  HDM Cell Separation Systems. BioTransplant granted Gambro the exclusive right to distribute these products worldwide, with the exception of the United States
and Japan, and the non-exclusive right to distribute these products in Canada. Gambro also has the option to negotiate the terms of an exclusive arrangement for Canada. If BioTransplant is
unable to negotiate an exclusive arrangement in Canada and subsequently reaches an agreement with a third party, then Gambro's non-exclusive rights in Canada will terminate. Gambro has the
exclusive option for a limited period of time to negotiate for the exclusive right to distribute products in the United States by making a one-time payment to the Company. Thereafter,
Gambro has the option, without payment of a fee, to negotiate on a non-exclusive basis for United States distribution rights. Gambro also has a right of prior notice and first negotiation
with respect to any third-party discussions BioTransplant may seek to engage in with respect to distribution in Japan.

Under
the terms of the agreement, BioTransplant is responsible for developing, manufacturing and seeking to obtain CE mark approval for the Company's Eligix HDM Cell Separation Systems.
Three of these products, the Eligix BCell-SC, CD8-DLI and CD8-SC Cell Separation Systems, have received CE mark approval, permitting their sale in the European
Union. Gambro will be responsible for continued clinical market development and all other aspects of marketing, sales and distribution. In August and September 2001, the Company received an
upfront licensing fee of $4.0 million, plus milestone payments of $2.0 million for obtaining CE mark approval for the Company's Eligix BCell-SC and CD8-DLI Cell
Separation Systems. The Company is recognizing these amounts as revenue over the seven-year term of the distribution agreement. During the three and six month periods ended June 30,
2002, the Company recognized $215,000 and $430,000 as license fee revenues, and $178,000 and $440,000 in product revenues, respectively, all of which were sold to Gambro BCT in the United States, and
as of June 30, 2002, $5.2 million is included as deferred revenue in the accompanying consolidated balance sheet. BioTransplant may receive future milestone payment for other new
products, if any, receiving CE mark approval.

10.    SALE OF COMMON STOCK

On June 10, 2002, the Company sold four million shares of common stock pursuant to a five million share shelf registration statement filed in
December 2001. The net proceeds of approximately $9.5 million will be used for working capital and other general corporate purposes.

11.    SUBSEQUENT EVENT

On July 29, 2002, the Company announced a new strategic focus and comprehensive restructuring plan intended to streamline operations and reduce overall
spending in subsequent quarters. The Company
expects to record a charge of approximately $210,000 in the third quarter of 2002 for employee termination costs.

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ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

Since commencement of our operations in 1990, we have been engaged primarily in the discovery, development and commercialization of therapeutics, therapeutic
devices and therapeutic regimens designed to suppress undesired immune responses and enhance the body's ability to accept donor cells, tissues and organs. The major sources of our working capital have
been the proceeds from sales of equity securities, sponsored research funding and license fees, capital lease financings and borrowings under term loans. Although we commenced initial sales of our
Eligix HDM Cell Separation Systems in Europe during the fourth quarter of 2001 through a distribution partner, we have not generated substantial product revenues from our sales of products to date. We
will be required to conduct significant additional research, development, testing and regulatory compliance activities that, together with general and administrative expenses, are expected to result
in significant and increasing operating losses for at least the next several years.

In
addition to conducting research, development and manufacturing on our own, we are a party to a number of collaborations and strategic relationships. Since 1995, we have had a
collaborative agreement with MedImmune, Inc. Currently, the main focus of this relationship is the development of Siplizumab, which we also refer to as MEDI-507, a humanized
monoclonal antibody we exclusively licensed to MedImmune for stand-alone indications. MedImmune is currently conducting multiple Phase II trials of Siplizumab for the treatment of psoriasis. We will
be entitled to receive royalties on any sales of Siplizumab and future generation products. In 2001, we entered into a distribution agreement with Gambro BCT for the distribution of our Eligix HDM
Cell Separation Systems, three versions of which are now available for sale in Europe. Since 1993, we have been involved in collaborations with Novartis to research, develop and commercialize
xenotransplantation products. In 2001, Immerge BioTherapeutics AG, the joint venture we formed with Novartis to research xenotransplantation products, began operations as an independently run company.
Novartis will fund the joint venture through 2003.

MedImmune

Under our collaborative agreement with MedImmune, MedImmune paid us a $2.0 million license fee at the time of execution of the agreement, and agreed to
fund and assume responsibility for clinical testing and commercialization of the BTI-322 monoclonal antibody and other related products developed by us, including Siplizumab, which is the
name given by MedImmune to MEDI-507, the humanized version of BTI-322. MedImmune has provided $2.0 million of non-refundable research support and has agreed
to make milestone payments which could total up to an additional $11.0 million. All milestone payments which are received are repayable from royalties, if any, on future sales of the
BTI-322 monoclonal antibody and other related products by MedImmune.

Eligix Acquisition

On May 15, 2001, we completed our acquisition of Eligix, Inc. Upon consummation of the merger, Eligix became our wholly-owned subsidiary. Under the
terms of the merger, we issued 4,939,200 shares of common stock in exchange for the outstanding common stock of Eligix and 990,000 shares of common stock to certain former employees of Eligix. The
990,000 shares issued to Eligix employees were subject to a repurchase option which lapsed on May 15, 2002.

We
accounted for the acquisition as a purchase. In accordance with the requirements of accounting principles generally accepted in the United States, we allocated the purchase price for
the acquisition to the assets acquired, including intangible assets consisting of in-process research and development, acquired technology and goodwill. The allocations among the
intangible assets were based upon an independent third-party valuation of the intangible assets acquired. As a result of a preliminary

12

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valuation, performed in December 2000, we allocated $20.0 million to in-process research and development, or IPR&D, and $25.0 million to acquired technology. The
excess of the purchase price over the fair value of identified intangible and tangible assets of $5.7 million was allocated to goodwill. During 2001, the intangible assets, including acquired
technology and goodwill, were amortized over their estimated useful lives of seven years. The fair value of the IPR&D was recorded as an expense as of the acquisition date. In connection with our
year-end audit, the third-party valuation firm finalized its valuation as of May 15, 2001 based upon revised estimates of expected cash flows from the developed portion of the
technology acquired from Eligix and other variables. As a result of the final valuation report, we reallocated $14.0 million from acquired technology to goodwill. As a result, we continued to
allocate $20.0 million to IPR&D, and allocated $11.0 million to acquired technology and $19.7 million to goodwill. Finally, we performed a review of our intangible assets as of
December 31, 2001 and determined that no impairment exists. The reallocation had no impact on our statement of operations for the year ended December 31, 2001.

At
the end of the second quarter of 2002, management concluded that certain conditions and events were such that impairment testing was required to be performed again with respect to the
goodwill and intangible assets acquired in the Eligix acquisition. These conditions and events included continued
unfavorable economic conditions and sales of our HDM Cell Separation Systems that were significantly below expectations, including quarter-to-quarter declines in sales. In addition, we have undergone
two reductions in force to help reduce spending and conserve cash as these negative events adversely affected the cash flow projections used to determine the fair value of the Eligix reporting unit
and related intangible assets.

Fair
value measurements of the Eligix reporting unit and related intangible assets were estimated with the assistance of a third-party specialist utilizing an income approach. Based on
this analysis, we recorded a loss from impairment of $18.0 million in the accompanying statement of operations for the three and six months ended June 30, 2002.

The
following table presents the changes in the carrying amounts of goodwill and intangible assets for the three months ended June 30, 2002:

|                              |  | Goodwill |             | Intangible Assets |   | Total      |  
|----------------------------- |  | -------- | ----------- | ----------------- | - | ---------- | -
|Balances as of March 31, 2002 |  | $        | 18,060,188  |                   | $ | 9,625,000  |  
|Amortization expense          |  |          |            |                   |   | (392,856   | )
|Loss from impairment          |  |          | (15,439,000 | )                 |   | (2,517,858 | )
|                              |  |          |             |                   |   |            |  
|Balances as of June 30, 2002  |  | $        | 2,621,188   |                   | $ | 6,714,286  |  
|                              |  |          |             |                   |   |            |  

Acquired
intangible assets subject to amortization consist of capitalized acquired technology of $6.7 million related to the Eligix acquisition (see Note 7). As of
June 30, 2002, accumulated amortization on acquired technology and goodwill was approximately $1.8 million and $1.6 million, respectively. For the six months ended June 30,
2002, amortization expense for intangible assets was $786,000. The estimated annual amortization expense for intangible assets subject to amortization is $1.4 million for fiscal year 2002 and
$1.1 million for each of the next five fiscal years.

Gambro DistributionEligix HDM Cell Separation Systems

In August 2001, we entered into an exclusive distribution agreement with Gambro BCT, a wholly-owned subsidiary of Gambro AB, for the distribution of our
Eligix HDM Cell Separation Systems. Under this agreement, as amended, we have granted Gambro the right to distribute these products worldwide, with the exception of the United States and Japan, and
the non-exclusive right to distribute these products in Canada. Gambro also has the option to negotiate the terms of an exclusive arrangement for Canada. If we are unable to negotiate an
exclusive arrangement in Canada and subsequently reach an agreement with a third party, then Gambro's non-exclusive rights in Canada will

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terminate. Gambro has the exclusive option for a limited period of time to negotiate for the exclusive right to distribute products in the United States by making a one-time payment to
us. Thereafter, Gambro has the option, without payment of a fee, to negotiate on a non-exclusive basis for United States distribution rights. Gambro also has a right of prior notice and
first negotiation with respect to any third-party discussions we may seek to engage in with respect to distribution in Japan.

We
and Gambro will share revenues under the distribution agreement based upon a specific formula. Under the terms of the agreement, we will be responsible for developing, manufacturing
and seeking to obtain CE Mark approval for our Eligix HDM Cell Separation Systems. Three of these products, the BCell-SC, CD8-DLI and CD8-SC Cell Separation
Systems, have received CE Mark approval, permitting their sale in the European Union. Gambro will be responsible for continued clinical market development and all other aspects of marketing, sales and
distribution. In August and September 2001, we received an upfront licensing fee of $4.0 million, plus milestone payments of $2.0 million for obtaining CE Mark approval for our
BCell-SC and CD8-DLI Cell Separation Systems. We are recognizing these amounts as revenue over the seven-year term of the distribution agreement. We are entitled to
receive future milestone payments for other new products, if any, receiving CE Mark approval.

Novartis/Immerge BioTherapeutics

From 1993 through October 2000, we were a party to two collaboration agreements with Novartis to research, develop and commercialize xenotransplantation
products. During these collaborations, we received and recognized as revenue an aggregate of $33.5 million in research funding and $16.5 million in license fees and milestone payments
from Novartis. In September 2000, we entered into an arrangement with Novartis to terminate the prior collaborations and combine our respective expertise in the field of xenotransplantation
into a newly formed, independently run Swiss company, Immerge BioTherapeutics AG, which began operations in January 2001.

Novartis
has committed to provide an aggregate of $30.0 million in research funding over three years to the joint venture, $20.0 million of which has been received to date
by Immerge BioTherapeutics, Inc., a
Delaware subsidiary of Immerge BioTherapeutics AG, to cover Novartis's funding obligation through 2002. Both we and Novartis have exclusively licensed to the joint venture patent rights and technology
in the field of xenotransplantation. The joint venture has granted to Novartis an exclusive, worldwide, royalty-bearing license to develop and commercialize any xenotransplantation products resulting
from the joint venture's research. We will receive royalties from the sale of xenotransplantation products by Novartis, if any.

We
entered into a contract research agreement with Immerge BioTherapeutics, Inc. under which we have committed approximately 20 full-time employees to perform research
and are providing administrative services at rates specified in the agreement. We are recognizing the expense reimbursement received from Immerge BioTherapeutics, Inc. as an offset to the
expenses we incur. For the six months ended June 30, 2002 and 2001, we recorded approximately $2,039,000 and $1,890,000 in research and development services and support, respectively, and
approximately $480,000 and $474,000 in general and administrative services and support reimbursement.

Novartis
holds 67% of the shares of Immerge BioTherapeutics AG and we hold the remaining 33%. All income, gain, profit or loss of the joint venture will be allocated to us and Novartis
pro rata based upon our respective equity ownership of the joint venture in effect in the period in which these items accrue. We will accrue losses up to the amount of our investment balance in
Immerge BioTherapeutics AG. Because we have not invested any amount, or committed to invest any amounts, in the joint venture, our investment balance is zero. Accordingly, we have not recognized any
losses related to the joint venture during 2002 or 2001. Initially, the board of directors of Immerge BioTherapeutics, Inc. will consist of four directors: one selected by us, one selected by
Novartis and two additional directors, one each designated by us and Novartis, who are experts in the field of

14

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xenotransplantation. Immerge BioTherapeutics AG has agreed not to undertake, or permit its subsidiaries to undertake, specified fundamental corporate actions without the consent of both shareholders.

RESULTS OF OPERATIONS

Three Months Ended June 30, 2002 and 2001

Revenues for the three months ended June 30, 2002 were $393,000. There were no revenues for the three months ended June 30, 2001. Revenues for the
three months ended June 30, 2002 were due to product sales of $178,000 and $215,000 in Gambro milestone payments and upfront license fees, respectively, which are being recognized ratably over
the remaining life of the Gambro BCT distribution agreement, as described in Note 9 of the notes to condensed consolidated financial statements.

Product
revenues for the three months ended June 30, 2002 declined from the first three months of 2002. The decline in product revenues, together with the other factors described
more fully in Note 8 to the notes to condensed consolidated financial statements, led to a loss from impairment of $18.0 million for the three months ended June 30, 2002, compared
to no loss from impairment for the three months ended June 30, 2001.

Research
and development expenses primarily consist of salaries and related expenses for personnel, sponsored research, consulting, clinical development costs, facilities related costs
and depreciation. Research and development expenses increased to $4.4 million for the three months ended June 30, 2002 from $2.9 million for the three months ended June 30,
2001. This increase was primarily due to the inclusion of Eligix expenses for the three months ended June 30, 2002.

General
and administrative expenses primarily consist of salaries and related expenses for personnel, facilities related costs, depreciation and professional fees. General and
administrative expenses increased to $1.1 million for the three months ended June 30, 2002, compared to $882,000 for the three months ended June 30, 2001. This increase was
primarily due to the inclusion of Eligix expenses for the three months ended June 30, 2002.

Interest
income decreased to $41,000 for the three months ended June 30, 2002 from $112,000 for the three months ended June 30, 2001. The decrease was due primarily to
lower cash balances available for investment purposes and lower interest rates in the three months ended June 30, 2002.

Interest
expense increased to $30,000 for the three months ended June 30, 2002 from $27,000 for the three months ended June 30, 2001. The increase was due primarily to
inclusion of Eligix expenses for the three months ended June 30, 2002.

As
a result of the above factors and approximately $985,000 of non-cash Eligix merger-related expenses (see Note 7 to the notes to condensed consolidated financial
statements) and a $18.0 million loss from impairment (see Note 8 to the notes to condensed consolidated financial statements) recognized in the second quarter of 2002, we generated a net loss
for the three months ended June 30, 2002 of $24.1 million, or $1.08 per share. During the second quarter of 2001, we generated a net loss of $25.6 million, or $1.76 per
share, mainly due to our recording of $20.0 million for in-process research and development and $1.9 million of non-cash Eligix related expenses.

Six Months Ended June 30, 2002 and 2001

Revenues for the six months ended June 30, 2002 were $869,000. There were no revenues for the six months ended June 30, 2001. Revenues for the six
months ended June 30, 2002 were due to product
sales of $440,000 and $429,000 in Gambro milestone payments and upfront license fees, respectively, which are being recognized ratably over the remaining life of the Gambro BCT distribution agreement,
as described in Note 9 of the notes to condensed consolidated financial statements.

15

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Product
revenues for the three months ended June 30, 2002 declined from the first three months of 2002. The decline in product revenues, together with the other factors described
more fully in Note 8 to the notes to condensed consolidated financial statements, led to a loss from impairment of $18.0 million for the six months ended June 30, 2002, compared
to no loss from impairment for the six months ended June 30, 2001.

Research
and development expenses increased to $8.6 million for the six months ended June 30, 2002 from $4.9 million for the six months ended June 30, 2001.
This increase was primarily due to the inclusion of Eligix expenses for the six months ended June 30, 2002.

General
and administrative expenses increased to $2.2 million for the six months ended June 30, 2002, compared to $1.4 million for the six months ended
June 30, 2001. This increase was primarily due to the inclusion of Eligix expenses for the six months ended June 30, 2002.

Interest
income decreased to $75,000 for the six months ended June 30, 2002 from $281,000 for the six months ended June 30, 2001. The decrease was due primarily to lower
cash balances available for investment purposes and lower interest rates in the six months ended June 30, 2002.

Interest
expense increased to $82,000 for the six months ended June 30, 2002 from $42,000 for the six months ended June 30, 2001. The increase was due primarily to
inclusion of Eligix expenes for the six months ended June 30, 2002.

As
a result of the above factors and approximately $2.5 million of non-cash Eligix merger-related expenses (see Note 7 to the notes to condensed consolidated
financial statements) and a $18.0 million loss from impairment (see Note 8 to the notes to condensed consolidated financial statements) recognized during the six months ended June 30,
2002, we generated a net loss for the six months ended June 30, 2002 of $30.7 million, or $1.41 per share. During the six months ended June 30, 2001, we generated a net
loss of $27.9 million, or $2.12 per share, mainly due to our recording of $20.0 million for in-process research and development and $1.9 million of non-cash
Eligix merger-related expenses.

LIQUIDITY AND CAPITAL RESOURCES

Background

Since our inception, our operations have been funded principally through the net proceeds of an aggregate of $109.3 million from sales of equity
securities. We have also received $50.0 million from research and development and collaboration agreements with Novartis, $4.0 million from an alliance agreement with MedImmune,
$6.0 million in up-front licensing fees and milestone payments from our distribution agreement with Gambro and $2.9 million in equipment financing. The proceeds of the sales
of equity securities, equipment financing and cash generated from the corporate collaborations with Novartis and MedImmune and our distribution agreement with Gambro have been used to fund operating
losses of approximately $142.2 million and the investment of approximately $9.6 million in equipment and leasehold improvements through June 30, 2002.

During
the six months ended June 30, 2002 and June 30, 2001, we used cash from operating activities of $9.7 million and $10.1 million, respectively. The cash
used in operations resulted primarily from our operating loss adjusted for non-cash expenses and changes in our working capital.

During
the six months ended June 30, 2002, we generated cash from investing activities of $1.6 million. This was primarily due to $1.9 million of net proceeds from
investing activities which consisted of maturities of short-term investments and was offset by the $339,000 cash paid for purchase of property and equipment. During the six months ended
June 30, 2001, we used $1.1 million of cash from investing activities. This was primarily due to a net increase in short-term investments of $2.3 million, which was
offset by the $113,000 cash paid for purchase of property and equipment additions, and $3.5 million of cash paid for transaction costs in connection with the acquisition of Eligix.

16

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During
the six months ended June 30, 2002 and 2001, we generated cash of $9.0 million and $17.8 million from financing activities, respectively. Our financing
activities consisted principally of issuances of our common stock, which were offset by payments on long-term debt.

During
1999, we extended the term of, and increased our borrowings under, our term note with a bank from $500,000 to $1.0 million for certain equipment and fixtures borrowing. As
of June 30, 2002, there was approximately $136,000 in borrowings outstanding. The bank has required the Company to secure the term note with a cash balance until the loan is paid off. In
connection with the acquisition of Eligix, we assumed the obligations under two outstanding loans to which Eligix was a party at the time
of the acquisition. As of June 30, 2002, the aggregate amount outstanding under these two loans was approximately $700,000.

We
have entered into sponsored research and consulting agreements with certain hospitals, academic institutions and consultants, requiring periodic payments by us. Our aggregate minimum
funding obligations under these agreements, each of which allows us to cancel without penalty, given sufficient notice, total approximately $4.6 million, which includes approximately
$2.9 million payable in 2002. We lease our facilities under operating leases that expire between 2003 and 2009.

On
May 8, 2002, we announced a cost reduction program, including a reduction in the workforce of approximately 15 full-time employees, and other measures to reduce
overall spending in subsequent quarters. We recorded a charge of approximately $260,000 in the second quarter of 2002 for employee termination costs.

On
July 29, 2002, the Company announced a new strategic focus for the AlloMune and Eligix Cell Separation System programs and a comprehensive restructuring plan intended to
streamline operations and reduce overall spending in subsequent quarters. The Company expects to record a charge of approximately $210,000 in the third quarter of 2002 for employee termination costs
related to a headcount reduction of approximately 23%.

Current Resources

We had cash, cash equivalents and short-term investments of $13.2 million as of June 30, 2002, as compared to $14.2 million as of
December 31, 2001.

We
anticipate that our existing cash, cash equivalents and short-term investments will be sufficient to fund our operating and capital requirements as currently planned into
the third quarter of 2003. The receipt of potential milestone payments could make cash resources last until the fourth quarter of 2003, however, there can be no assurance as to whether or when we will
receive these potential milestone payments. Even if we do receive these milestone payments, we will need to raise additional funds, and may seek to raise these funds through additional financings,
including public or private equity offerings, collaborative arrangements with corporate partners or a combination of any of the foregoing. There can be no assurance that funds will be available on
terms acceptable to us, if at all. If adequate funds are not available, we may be required to delay, scale back or eliminate some or all of our product development programs or to license to others the
right to commercialize products or technologies that we would otherwise seek to develop and commercialize ourselves, any of which would have a material and adverse effect on us.

Even
if we are able to raise the substantial additional funds required to finance our operations, our cash requirements may vary materially from those now planned. Factors that may
affect this variability include, without limitation:



17

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CRITICAL ACCOUNTING POLICIES

While our significant accounting policies are summarized in Note 2 to our consolidated financial statements included in our Annual Report on
Form 10-K for the year ended December 31, 2001, as filed with the SEC, we believe that certain of these accounting policies are critical to a portrayal of our financial
position and results and require the application of the most significant judgment by our management. In applying these policies, our management uses its judgment to determine the appropriate
assumptions to be used in the determination of estimates. Those estimates are based on our historical experience, terms of existing contracts, our observance of trends in the industry, information
provided by our strategic partners and information available from other outside sources, as appropriate. Actual results may differ significantly from the estimates contained in our financial
statements. Our critical accounting policies include:

Impairment of long-lived assets.Our long-lived assets include intangible assets and goodwill. At
June 30, 2002, we had $9.3 million of intangible assets and goodwill, net, which accounted for approximately 32.6% of our total assets. In assessing the recoverability of our intangible
assets and goodwill, we must make assumptions in determining the fair value of the asset by estimating future cash flows and considering other factors, including significant changes in the manner or
use of the assets, or negative industry or economic trends. If these estimates or their related assumptions change in the future, we may be required to record additional impairment charges for these
assets. We adopted the provisions of Statement of Financial Accounting Standards, or SFAS, No. 142,Goodwill and Other Intangible Assetsand
SFAS, No. 144,Accounting for the Impairment of Long Lived Assetsas of January 1, 2002, and are required to test our intangible assets
for impairment on a periodic basis. We had previously performed a review of the realizability of our intangible assets as of December 31, 2001 and determined that no impairment existed.

At
the end of the second quarter of 2002, management concluded that certain conditions and events were such that impairment testing was required to be performed with respect to the
goodwill and intangible assets acquired in the Eligix acquisition. These conditions and events included continued unfavorable economic conditions, sales of our HDM Cell Separation Systems that were
significantly below expectations, including quarter-to-quarter declines in sales, and two reductions in force related to these activities. These indicators of impairment adversely affected the cash
flow projections used to determine the fair value of the Eligix reporting unit and related intangible assets.

Fair
value measurements of the Eligix reporting unit and related intangible assets were estimated with the assistance of a third-party specialist utilizing an income approach, which is
currently being finalized. Based on this analysis, we recorded a loss from impairment of $18.0 million in the accompanying statement of operations for the three and six months ended
June 30, 2002. The impairment loss is an estimate and its finalization is subject to completion of a third-party specialist's assessment.

However,
future events such as those described above, could cause us to conclude that additional impairment indicators exist and that goodwill or other intangible assets are impaired.
Additionally, we will be required to perform our annual impairment test later in fiscal 2002. If future estimates of cash flows are less than currently projected, an additional impairment loss may be
required. Any resulting impairment loss could have a material adverse impact on our financial position and results of operations.

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Revenue recognition.Our revenue recognition policy is significant because our revenue is a key
component of our results of
operations. In addition, our revenue recognition determines the timing of certain expenses. We follow specific and detailed guidelines in measuring revenue; however, certain judgments affect the
application of our revenue policy. Revenue results are difficult to predict, and any shortfall in revenue or delay in recognizing revenue could cause our operating results to vary significantly from
quarter to quarter and could result in future operating losses. For a description of our revenue recognition policy, see note 4 to our condensed consolidated financial statements.

Inventories.Inventories are stated at the lower of cost or market, cost being determined on the first-in,
first-out method. Reserves for slow moving and obsolete inventories are provided based on historical experience and product demand. We have only recently begun the commercialization of our
products and have limited experience in assessing obsolescence. We evaluate the adequacy of these reserves periodically.

RISK FACTORS THAT MAY AFFECT RESULTS

This Quarterly Report on Form 10-Q and certain other communications made by us contain forward-looking statements, including statements about
our growth and future operating results, discovery, development and commercialization of products, potential acquisitions, strategic alliances and intellectual property. For this purpose, any
statement that is not a statement of historical fact should be considered a forward-looking statement. We often use the words "believes", "anticipates", "plans", "expects", "intends and similar
expressions to help identify forward-looking statements.

There
are a number of important factors that could cause our actual results to differ materially from those indicated or implied by forward-looking statements. Factors that could cause
or contribute to such differences include those discussed below, as well as those discussed elsewhere in this Form 10-Q. We disclaim any intention or obligation to update or revise
any forward-looking statements, whether as a result of new information, future events or otherwise.

We have a history of operating losses and our future profitability is uncertain.

We were incorporated in 1990 and have experienced significant operating losses in each year since that date. As of June 30, 2002, our accumulated deficit
was $142.2 million. Our net loss for the six months ended June 30, 2002 and for the fiscal years ended December 31, 2001, 2000 and 1999 was $30.7 million,
$42.6 million, $11.7 million and $8.7 million, respectively. We expect to continue to incur significant losses for the foreseeable future. We only began selling our
BCell-SC and CD8-DLI Cell Separation Systems in Europe in late 2001, and plan to begin selling our CD8-SC Cell Separation System in Europe in the third quarter of 2002. To
date, our revenue has been generated principally from license fee and milestone payments from our collaborative partners. We may never achieve significant revenues from product sales, and we may not
achieve profitable operations.

We will require substantial additional financing, which may be difficult to obtain and may dilute your ownership interest in us.

We anticipate that our existing funds will be sufficient to fund our operating and capital requirements as currently planned into the third quarter of 2003. We
expect to use rather than generate funds from operations for the foreseeable future. The actual amount of funds we will require will be determined by a number of factors, many of which are beyond our
control. In particular, we will require substantial funds to conduct research and development, including preclinical testing and clinical trials of our AlloMune Systems and Eligix HDM Cell Separation
Systems and to manufacture products that are approved for commercial sale, such as our BCell-SC and CD8-DLI Cell Separation Systems, which we began selling through a
distributor in Europe in late 2001, and our CD8-SC Cell Separation System, which we plan to begin selling in Europe in the third quarter of 2002. If we cannot raise more

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funds, we could be required to reduce our capital expenditures, scale back or abandon our research and product development activities, reduce our workforce and license to others products or
technologies we would otherwise seek to commercialize ourselves.

We
will seek additional funding through collaborative arrangements, by borrowing money or by selling additional equity securities. Any sales of additional equity securities are likely to
result in further dilution to our then existing stockholders. Further, if we issue additional equity securities, the new equity securities may have rights, preferences or privileges senior to those of
existing holders of our common stock. We may also borrow money from conventional lenders, possibly at high interest rates and on other terms that are unfavorable to us, which will increase the risk of
your holdings. Despite our efforts, additional funding may not be available to us at all or only on terms that are unacceptable to us. We also could be required to seek funds through arrangements with
collaborative partners or others that may require us to relinquish rights to our technologies, product candidates or products which we would otherwise pursue on our own.

Our restructuring of operations may not achieve the results we intend and may harm our business.

In July 2002, we announced a restructuring plan, which included a reduction in headcount of approximately 23% in order to reduce our cash burn rate. The
planning and implementation of our restructuring has placed, and may continue to place, a significant strain on our managerial, operational, financial and other resources. Additionally, the
restructuring may negatively affect our employee turnover, recruiting and retention of important employees. If we are unable to implement our restructuring effectively or if we experience difficulties
in effecting the restructuring, our expenses could increase more quickly than we expect. If we find that our restructuring announced in July does not sufficiently reduce our cash burn rate, we may
find it necessary to implement further streamlining of our expenses, to perform another reduction in our headcount or to undertake a further restructuring of our business.

We will depend on our BCell-SC, CD8-DLI and CD8-SC Cell Separation Systems for substantially all of our near-term product
revenue, and if these products do not gain widespread market acceptance, then our near-term product revenue will not grow.

Our
future growth depends upon our ability to successfully commercialize and sell our products. We expect to derive most of our near-term product revenues from sales of our
BCell-SC, CD8-DLI and CD8-SC Cell Separation Systems. We began distributing two of these products through a distribution agreement with Gambro in late 2001 and, to date, we
have sold relatively few devices. Because we currently depend on our BCell-SC,CD8-DLI and CD8-SC Cell Separation Systems to generate substantially all of our
near-term product revenue, if we fail to achieve widespread market acceptance of these products or if Gambro BCT fails to effectively market these products, we will not be able to grow our
near-term product revenue.

If we do not develop and market new products, our ability to achieve profitability will be harmed.

Our ability to achieve profitability depends on our and our collaborative partners' ability to develop, obtain regulatory approval for, manufacture, introduce and
successfully market new products and product candidates, either directly or with our partners. Our product candidates will require extensive development and testing, as well as regulatory approval,
before they can be successfully marketed and sold to the public. The MEDI-507 antibody product under development, the Eligix HDM Cell Separation Systems technology and the prototype
AlloMune Systems have been tested in relatively few patients and we may not be able to demonstrate the clinical benefits of these products in a larger patient population. Furthermore, the technology
that we have exclusively licensed to our joint venture with Novartis Pharma AG is based upon the transplantation of organs from swine into humans. To our

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knowledge, transplantation of swine organs has never been tested in humans. As a consequence, we are not sure whether any of our products under development or the products under development by our
collaborators will be effective in treating any of the disorders we have targeted. In addition, any products under development may prove to have undesirable or unintended side effects, toxicities or
other characteristics that may prevent or limit their commercial use. If our technological approach is not successful or the medical community and/or third-party payors do not accept our products as
clinically useful, cost-effective and safe, then neither we nor our collaborators will be able to develop or commercialize these products, which will substantially impair our ability to
achieve profitable operations.

If clinical trials of our products under development are not successful or are not completed on a timely basis, we will not be able to develop and commercialize these products
and, therefore, we may not achieve profitability.

To obtain regulatory approvals for the commercial sale of our products under development, we and our collaborative partners will need to complete extensive
clinical trials in humans to demonstrate the safety and efficacy of these products. We have had limited experience in conducting clinical trials.

Prior
to commencing new clinical trials, we must submit investigational new drug and/or investigational device exemption applications to the Food and Drug Administration. Even if we
receive authorization from the FDA to commence clinical trials, we or our collaborative partners may not be able to successfully complete these trials within an acceptable timeframe, if at all. How
quickly we and our collaborative partners complete clinical trials is dependent in part upon the rate of enrollment of patients. Patient enrollment is a function of many factors, including the size of
the patient population, the proximity of patients to clinical sites, the eligibility criteria for the study and the existence of competitive clinical trials. In particular, the patient population for
a number of our potential products is small. If we experience delays in patient enrollment, we may incur additional costs and delay our research and development programs.

Furthermore,
we, our collaborative partners or the FDA may suspend our clinical trials at any time on various grounds, including a finding that the patients in the trials are being
exposed to unacceptable health risks. Finally, our clinical trials, if completed, may not show the potential product to be safe or effective, thereby preventing regulatory approval.

We are dependent on our collaborative partners to conduct clinical trials on our MEDI-507 and xenotransplantation products and, therefore, we are not in control of
the timing of these clinical trials.

We are dependent upon MedImmune to conduct clinical trials with respect to stand-alone MEDI-507 product candidates and will be dependent upon Novartis
to conduct clinical trials for the development of xenotransplantation products, if any, that arise out of our joint venture's research program. We may become dependent upon other third parties to
conduct future clinical trials of our AlloMune Systems and Eligix HDM Cell Separation Systems. As a result, we will have less control over these clinical trials
than if we were conducting the trials directly. Consequently, these trials may not begin or be completed on a schedule that is acceptable to us, which could lead to delays or uncertainties in the
regulatory approval process or in the commercial introduction of these products, either of which could substantially harm our business and ability to achieve profitability.

The approval process is costly and lengthy and we may not obtain and maintain the regulatory approvals required to successfully market and sell our products.

We
must obtain regulatory approval for our ongoing research and development activities and before marketing or selling any of our products. For example, although our
BCell-SC, CD8-DLI and CD8-SC Cell Separation Systems have received CE Mark approval in Europe, we will need to conduct

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extensive clinical trials and receive FDA approval before we can market these products in the U.S. We may not receive regulatory approvals to conduct clinical trials of our products or to manufacture
or market our products. In addition, regulatory agencies may not grant such approvals on a timely basis or may revoke previously granted approvals or impose fines, suspensions, product recalls and
other sanctions if we fail to comply with applicable regulatory requirements. If our products do not receive regulatory approvals, or if we do not otherwise comply with government regulations, our
business would be harmed.

The
process of obtaining FDA and other required regulatory approvals is expensive and typically takes a number of years, depending on the complexity and novelty of the product. Moreover,
for any products that are approved, the marketing, distribution and manufacture of these products will remain subject to extensive regulatory requirements. For example, any regulatory approval for a
product may limit the indications or markets in which the product can be used or require additional post-approval studies. Any regulatory body can have a product removed from the market if
a previously unknown problem with the product is discovered. Any delay in obtaining or failure to obtain or maintain required clearance or approval of a product by the appropriate regulatory
authorities, would materially adversely affect our ability to generate revenues from the affected product. We have limited experience in filing and prosecuting the applications required to gain and
maintain regulatory approval.

There
is limited regulatory precedent for the approval of products based upon the technologies that we are employing to develop products. MEDI-507, our AlloMune Systems and
our Eligix HDM Cell Separation Systems are based on new technologies and/or new therapeutic approaches that have not been extensively tested in humans. Accordingly, the regulatory requirements
governing these products under development may be more rigorous than for conventional products. In addition, the FDA has not yet established final or comprehensive guidelines for xenotransplantation.
As a result, we may experience a longer regulatory process in connection with any products that we or our collaborators seek to develop based on these new technologies and/or new therapeutic
approaches.

We
also are subject to numerous foreign regulatory requirements governing the design and conduct of the clinical trials and the manufacturing and marketing of our future products. The
approval procedure varies among countries. The time required to obtain foreign approvals often differs from that required to obtain FDA approvals. Moreover, even if we receive FDA approval, we may not
receive necessary approvals by regulatory authorities in other countries.

All
of these regulatory risks also are applicable to development, manufacturing and marketing undertaken by our key collaborators and any other future collaborators who may seek to
develop, market and sell products based upon our technologies.

We are dependent on collaborative relationships to develop, manufacture and sell some products, and if these parties are not successful, then we will not achieve significant
revenues.

We
have several strategic relationships for the development, manufacture and distribution of our products and products based upon our technologies. We have a collaborative agreement with
MedImmune under which we have provided MedImmune with the exclusive worldwide right to develop and commercialize products derived from the BTI-322 and MEDI-507 antibodies. We
have also entered into a multi-year exclusive distribution agreement with Gambro for the distribution of our Eligix HDM Cell Separation Systems, and other cell separation systems we may in
the future develop. Gambro has been granted the exclusive right to distribute these products worldwide, with the exception of the United States, Canada and Japan. In addition, our joint venture with
Novartis, Immerge BioTherapeutics, has exclusively licensed to Novartis the right to develop and commercialize any products derived from Immerge's research program in xenotransplantation, which refers
to the transplantation of cells, tissues and organs from one species to another.

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Under
each of these collaborative agreements, we have the right to receive royalties or a share of revenue on product sales, if any. Our ability to achieve revenue under these
arrangements will be heavily dependent on a number of factors, including the efforts and activities of our collaborative partners. Our arrangements with our collaborative partners allow them
significant discretion in determining the efforts and resources that they will apply to the development, commercialization and sale of products based upon our technologies. If any of these
collaborative partners do not perform successfully, such failure may delay or prevent regulatory approval and/or product launch, impair our ability to deliver products on a timely basis, impair our
competitive position or otherwise reduce or eliminate any sales revenues that we may receive.

We have only limited sales and marketing experience and may depend significantly on third parties who may not successfully commercialize our products.

We have only limited sales, marketing and product distribution experience, and our current sales and marketing operations, which we only recently began to
develop, is not sufficient to achieve the market presence and sales we need to expand our business. We plan to rely significantly on sales, marketing and distribution arrangements with third parties,
including our collaborative partners. For example, we have granted Gambro exclusive worldwide distribution rights, exclusive of the United States, Canada and Japan, for our Eligix HDM Cell Separation
Systems, and other cell separation products which we may in the future develop. Either we or Gambro may terminate the agreement if the other party breaches a material covenant, agreement or obligation
under the agreement. If Gambro terminates the distribution agreement, we currently do not have the sales and marketing operations to commence selling these products independently. We have also granted
MedImmune exclusive worldwide marketing rights to the MEDI-507 product under development, and our joint venture with Novartis, Immerge BioTherapeutics, has granted to Novartis the
exclusive worldwide rights to develop and market products based upon our xenotransplantation technologies. We may have to enter into additional marketing arrangements in the future and we may not be
able to enter into these additional arrangements on terms which are favorable to us, if at all. In addition, we may have limited or no control over the sales, marketing and distribution activities of
these third parties and sales through these third parties could be less profitable to us than direct sales. These third parties could sell competing products and may devote insufficient sales efforts
to our products. Our future revenues will be materially dependent upon the success of the efforts of these third parties.

We
may seek to independently market products that are not already subject to marketing agreements with other parties. If we determine to perform sales, marketing and distribution
functions ourselves, we could face a number of additional risks, including:



If we experience delays or interruptions in manufacturing of our Eligix HDM Cell Separation Systems, we may experience customer dissatisfaction and our reputation could suffer.

If we fail to produce enough products at our own manufacturing facility or at a third-party manufacturing facility, we may be unable to deliver products to our
customers on a timely basis, which
could lead to customer dissatisfaction and could harm our reputation and ability to compete. We currently produce key components of our BCell-SC, CD8-DLI and CD8-SC
Cell Separation Systems in one manufacturing facility. We would likely experience significant delays or cessation in producing our BCell-SC, CD8-DLI and CD8-SC Cell
Separation Systems at this facility if a labor strike, natural disaster or other supply disruption were to occur. If we are unable to manufacture our Eligix HDM

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Cell Separation Systems at our own facility, we may be required to enter into arrangements with one or more contract manufacturing companies. We could encounter delays or difficulties establishing
relationships with contract manufacturers or in establishing agreements on terms that are favorable to us. In addition, if we are required to depend on third-party manufacturers, our profit margins
may be lower, which will make it more difficult for us to achieve profitability.

We will depend on third-party manufacturers to produce some of our products under development, and if these third parties do not successfully manufacture our products our
business will be harmed.

We currently rely upon MedImmune to produce material for preclinical and clinical testing of MEDI-507 and expect to continue to do so in the future.
In addition, if we receive the necessary regulatory approvals for other products under development, we also expect to rely upon third parties, including our collaborative partners, to produce
materials required for commercial production. We may not be able to enter into commercial-scale manufacturing contracts on a timely or commercially reasonable basis, if at all. To the extent that we
enter into manufacturing arrangements with third parties, we will be dependent upon these third parties to perform their obligations in a timely and effective manner. If third-party manufacturers with
whom we contract fail to perform their obligations, our competitive position and ability to generate revenue may be adversely affected in a number of ways, including:



If we or our third-party manufacturers fail to comply with regulatory requirements, we could experience disruptions in the manufacture and sale of our products.

Manufacturers, including us, must adhere to the FDA's current good manufacturing practices regulations, which are enforced by the FDA through its facilities
inspection program. We and any of our third-party manufacturers may not be able to comply or maintain compliance with good
manufacturing practices regulations. If we or our manufacturers fail to comply with these regulations, our receipt of premarket approval and/or our ability to continue manufacturing our products could
be significantly delayed, or we or the third-party manufacturer could be subject to FDA enforcement action. For a premarket approval device, if we change our manufacturing facility or switch to a
third-party manufacturer we will be required to submit a premarket approval application supplement before the change is implemented. If we experience any regulatory-related manufacturing delays or
difficulties, our ability to deliver products to our distributors or customers would be impaired, which could reduce our revenues and harm our business.

Because we rely on a limited number of suppliers, we may experience difficulty in meeting our customers' demands for our Eligix HDM Cell Separation Systems in a timely manner
or within budget.

We
currently purchase key components of our Eligix HDM Cell Separation Systems from a variety of outside sources. Some of these components may only be available to us through a few
sources. We generally do not have long-term agreements with any of our suppliers.

Our
reliance on our suppliers exposes us to risks, including:



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Consequently,
in the event that our suppliers delay or interrupt the supply of components for any reason, our ability to produce and supply our products to our distributor could be
impaired, which could lead to customer dissatisfaction.

If we are not able to obtain patent protection for our discoveries or we infringe patent rights of third parties, then our ability to market our products will be substantially
harmed.

Our success depends in significant part on our ability to:



The
validity and permissible scope of claims covered in patents relating to our technology involve important unresolved legal principles. Furthermore, there is substantial uncertainty as
to whether human clinical data will be required for issuance of patents for human therapeutics. If human clinical data are required, our ability to obtain patent protection could be delayed or
otherwise adversely affected.

Patents
may not issue from any patent applications that we own or license. If patents do issue, the claims allowed may not be sufficiently broad to protect our technology. In addition,
issued patents that we own or license may be challenged, invalidated or circumvented. Our patents also may not afford us protection against competitors with similar technology. Because patent
applications in the United States are maintained in secrecy until patents issue, third parties may have filed or maintained patent applications for technology used by us or covered by our pending
patent applications without our being aware of these applications.

A
patent recently issued to a major pharmaceutical company directed towards recombinant production of monoclonal antibodies. We may require a license under this patent with respect to
MEDI-507. There can be no assurance that such a license will be granted to us or that we can obtain a license on terms favorable to us. If a required license is not available, our ability
to generate revenue would be adversely affected.

We
may not hold proprietary rights to all of the patents related to our proposed products or services. These patents may be owned or controlled by third parties. As a result, we or our
collaborative partners may be required to obtain licenses under third-party patents to market our proposed products or services. If licenses are not available on acceptable terms, we or our
collaborative partners will not be able to market these products or services.

We
also rely on trade secrets and proprietary know-how that we seek to protect, in part, by confidentiality agreements with our employees and consultants. We cannot guarantee
these agreements will not be breached, that we would have adequate remedies for any such breach or that our trade secrets will not otherwise become known or independently developed by competitors.

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If we lose important license rights, we may be unable to successfully develop and commercialize our products and achieve profitability.

We are a party to technology in-licenses with the Catholic University of Louvain, the Alberta Research Council and the Coulter Corporation. We expect
to enter into additional licenses in the future. These in-licenses relate to important technologies that may be necessary for the development and commercialization of our products. These
licenses impose various commercialization, indemnification, royalty, insurance and other obligations on us. Although we currently meet the requirements imposed by the licenses, if we fail to comply
with these requirements in the future, the licensors will have the right to terminate these licenses or make the licenses non-exclusive, which could affect our ability to exploit important
technologies that are required for successful development of our products.

We face substantial competition, which could adversely affect our revenues and results of operations.

The products we develop and market compete with existing and new products being created by pharmaceutical, biopharmaceutical, biotechnology and medical device
companies and universities. Many of these entities have significantly greater research and development capabilities, as well as substantial marketing, manufacturing, financial and managerial resources
and represent significant competition. With respect to our currently marketed BCell-SC, CD8-DLI and CD8-SC Cell Separation Systems, we are competing against large
companies that have significantly greater financial resources and established marketing and distribution channels for competing products.

The
pharmaceutical industry is intensely price competitive and we expect we will face this and other forms of competition. Development by others may render our products or technologies
obsolete or noncompetitive, and we may not be able to keep pace with technological developments to maintain a competitive position in the market. Many of our competitors have developed or are in the
process of developing technologies that are, or in the future may be, the basis for products that compete with our own. Some of these products may have an entirely different approach or means of
accomplishing the desired therapeutic effect than our products and may be more effective and less costly. In addition, many of these competitors have significantly greater experience than we do in
undertaking preclinical testing and human clinical trials and obtaining regulatory approvals of such products. Accordingly, our competitors may succeed in commercializing products more rapidly than we
can.

If we are unable to meet the operational, legal and financial challenges that we will encounter in our international operations, we may not be able to grow our business.

We currently expect to derive substantially all of our near-term product revenue from the sale through a third-party distributor of our
BCell-SC, CD8-DLI and CD8-SC Cell Separation Systems in the European Union. We are subject to a number of challenges which specifically relate to our international
business activities. Our international operations may not be successful if we are unable to meet and overcome these challenges, which would limit the growth of our business. These challenges include:



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Our business exposes us to the risk of product liability claims for which we may not be adequately insured.

We
face an inherent business risk of exposure to product liability claims in the event that the use of our products results in adverse effects during research, clinical development or
commercial use. We cannot guarantee we will avoid significant product liability exposure. Our product liability insurance coverage is currently limited to $10.0 million, which may not be
adequate to cover potential liability exposures. Moreover, adequate insurance coverage may not be available at an acceptable cost, if at all. Any product liability claim would distract management's
attention, impair market acceptance of our products and our reputation and harm our ability to achieve revenue from sales of the product.

If the estimates we make, and the assumptions on which we rely, in preparing our financial statements prove inaccurate, our actual results may vary significantly.

Our financial statements have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial
statements requires us to make estimates and judgments that affect the reported amounts of our assets, liabilities, revenues and expenses, the amounts of charges taken by us and related disclosure. We
base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. There can be no assurance, however, that our estimates, or the
assumptions underlying them, will be correct. Our actual financial results may vary significantly from the estimates contained in our financial statements.

Our inability to attract or retain key personnel could harm our business.

Our ability to develop our business depends in part upon our attracting and retaining qualified management and scientific personnel. The number of qualified
personnel is limited and competition for such personnel is intense. We may not be able to continue to attract or retain qualified people. The loss of our key personnel or the failure to recruit
additional key personnel could significantly impede attainment of our objectives and harm our financial condition and results of operations.

The uncertainty of pharmaceutical pricing and reimbursement may negatively impact our results of operations.

Our
ability to successfully commercialize our products may depend in part on the extent to which reimbursement for the cost of such products and related treatment will be available from
government health administration authorities, private health coverage insurers and other organizations. The pricing, availability of distribution channels and reimbursement status of newly approved
healthcare products is highly uncertain and we cannot assure you that adequate third-party coverage will be available for us to
maintain price levels sufficient for realization of an appropriate return on our investment in product development. In certain foreign markets, pricing or profitability of healthcare products is
subject to government control. In the U.S., there have been, and we expect that there will continue to be, a number of federal and state proposals to implement similar governmental control. In
addition, an increasing emphasis on managed care in the U.S. has and will continue to increase the pressure on pharmaceutical pricing. While we cannot predict whether any such legislative or
regulatory proposals will be adopted or the effect such proposals or managed care efforts may have on our business, the announcement of such proposals or efforts could harm our ability to raise
capital, and the adoption of such proposals or efforts could harm our results of operations. Further, to the extent that such proposals or efforts harm other pharmaceutical companies that are
prospective corporate partners, our ability to establish corporate collaborations may be adversely affected. In addition, third-party payors are increasingly challenging the prices charged for medical
products and services. We do not know whether our products and product candidates, if approved, will be considered cost effective or that

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reimbursement to the consumer will be available or will be sufficient to allow us to sell our products on a competitive basis.

If we are unable to comply with the continued listing requirements of the Nasdaq National Market, our common stock could be delisted from the Nasdaq National Market.

Our common stock trades on the Nasdaq National Market. In order to continue trading on the Nasdaq National Market, we must satisfy the continued listing
requirements for that market. Last year, the Nasdaq National Market enacted changes to its continued listing requirements. The changes are effective for BioTransplant on November 1, 2002. While
we are presently in compliance with the continued listing requirements currently applicable to us, we may not be able to maintain compliance with the continued listing requirements that become
effective on November 1, 2002.

Under
the continued listing requirement standard currently utilized by BioTransplant, we are required to have minimum net tangible assets of $4.0 million. Under the continued
listing requirements applicable to BioTransplant on November 1, 2002, the minimum net tangible asset requirement will be replaced with a minimum stockholders' equity requirement of
$10.0 million. At June 30, 2002, we had net tangible assets of $10.2 million and stockholders' equity of $19.5 million. However, unless we are able to raise funds through sales of
equity, or otherwise, our stockholders' equity will decrease until our revenues exceed our spending. If we do not satisfy the $10.0 million stockholders' equity requirement and the other
applicable continued listing requirements effective on November 1, 2002, or at any point thereafter, our common stock may be delisted from the Nasdaq National Market.

A
delisting of our common stock from the Nasdaq National Market would materially reduce the liquidity of our common stock and result in a corresponding material reduction in the price of
our common stock. In addition, any such delisting would materially adversely affect our ability to raise capital through alternative financing sources on terms acceptable to us, or at all.

Our stock price is highly volatile, and the market price of our common stock may rapidly and substantially decline.

The market price of our common stock is highly volatile. For example, during the past three years, our stock price fluctuated from a low sale price of $1.50 in
the quarter ending September 30, 2002 to a high sale price of $23.00 in the quarter ended March 31, 2000. Prices for our common stock will be determined in the market place and may be
influenced by many factors, including fluctuations in our financial results and investors' perceptions of us, as well as their perceptions of general economic, industry and market conditions, and the
daily trading volumes of our common stock. Market fluctuations may adversely affect the market price of our common stock and may cause a rapid and substantial decline in the value of your investment
in our common stock. In particular, factors that may cause such volatility include our ability to complete clinical trials of our product candidates, the results of such trials, our ability to expand
sales of our products and our ability to meet the expectations of investors and securities analysts.

In
the past, companies that have experienced volatility in the market price of their stock have been subject to class action litigation. If we were to become involved in this type of
litigation, even if it was found that the claim had no merit, we could incur substantial costs and diversion of management's attention, which could harm our business, financial condition and operating
results.

The general business climate is uncertain and we do not know how this will impact our business or our stock price.

Over the past two years, there have been dramatic changes in economic conditions, and the general business climate has been negatively impacted. Indices of the
U.S. stock markets have fallen significantly and consumer confidence has waned. Compounding the general unease about the current

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business climate are the still unknown economic and political impacts of the September 11, 2001 terrorist attacks and hostilities abroad. We are unable to predict how any of these factors may
affect our business or stock price.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS

We own financial instruments that are sensitive to market risks as part of our investment portfolio. The primary objective of the investment portfolio is to
preserve our capital until we are required to fund operations, including our research and development activities. All of these market-risk sensitive instruments are classified as
held-to-maturity and are not held for trading purposes. We do not own derivative financial instruments in our investment portfolio. Our investment portfolio includes
investment-grade debt instruments. These bonds are subject to interest rate risk, and could decline in value if interest rates fluctuate. Due to the short duration and conservative nature of these
instruments,
we do not believe that we have a material exposure to interest rate risk. We do not anticipate any near-term changes in the nature of our market risk exposure or management's objectives
and strategies with respect to managing such exposures.

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PART II. OTHER INFORMATION

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

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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.

|                |  | BIOTRANSPLANT INCORPORATED(Registrant)
|--------------- |  | --------------------------------------
|August 19, 2002 |  | By:                                   

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Exhibit Index

|Exhibit No. |  | Description                                                                                                                                                                 
|----------- |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|99.1        |  | Certificate of the Chief Executive Officer and Vice President, Finance and Treasurer of BioTransplant Incorporated pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

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