EXHIBIT 23.2

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the incorporation by reference in the Registration Statement on
Form S-8 and related Prospectus of Genzyme Corporation for the registration of
158,868 shares of Genzyme General Division common stock of our report dated
January 31, 2001, with respect to the financial statements of Focal, Inc.
included in its Annual Report (Form 10-K) for the year ended December 31, 2000
filed with the Securities and Exchange Commission.

                                              /s/ Ernst & Young LLP

Boston, Massachusetts
September 26, 2001