News

April 24, 2008
ImmunoGen, Inc. Announces Conference Call to Discuss its Third Quarter Fiscal Year 2008 Financial Results

WALTHAM, Mass.--(BUSINESS WIRE)--April 24, 2008--ImmunoGen, Inc. (Nasdaq: IMGN) will host a conference call at 4:30 p.m. ET on Thursday, May 1, 2008 to discuss the Company's financial results for the three-month period ended March 31, 2008 -- the third quarter of ImmunoGen's 2008 fiscal year. Management also will provide an update on the Company.

To access the live call by phone, dial 913-981-4900. No passcode is required. The call also may be accessed through the Investor Information section of the Company's website, www.immunogen.com. Following the live webcast, a replay of the call will be available at the same location through May 8, 2008.

About ImmunoGen, Inc.

ImmunoGen, Inc. develops targeted anticancer biopharmaceuticals. The Company's proprietary Tumor-Activated Prodrug (TAP) technology uses tumor-targeting antibodies to deliver a potent cell-killing agent specifically to cancer cells. Two TAP compounds wholly owned by ImmunoGen are in clinical testing -- IMGN901 and IMGN242. Three TAP compounds are in clinical testing through ImmunoGen's collaborations with other companies -- trastuzumab-DM1 (T-DM1), in development by Genentech, and AVE9633 and SAR3419, in development by sanofi-aventis. Additionally, the naked antibody compound, AVE1642, is in clinical testing through the Company's collaboration with sanofi-aventis. Multiple compounds are in research/preclinical development through ImmunoGen's collaborations and internal programs.

CONTACT:
ImmunoGen, Inc.
Carol Hausner, 781-895-0600
Executive Director, Investor Relations and Corporate Communications
info@immunogen.com

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