Press release

Oct 20, 2008
ImmunoGen, Inc. Announces Conference Call to Discuss its First Quarter Fiscal Year 2009 Financial Results
ImmunoGen, Inc. Announces Conference Call to Discuss its First Quarter Fiscal Year 2009 Financial ResultsWALTHAM, Mass., Oct 20, 2008 (BUSINESS WIRE) -- ImmunoGen, Inc. (Nasdaq:IMGN) will host a conference call at 4:30pm EDT on Monday, October 27, 2008 to discuss the Company's financial results for the three-month period ended September 30, 2008 -- the first quarter of ImmunoGen's 2009 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 November 3, 2008.

About ImmunoGen, Inc.

ImmunoGen, Inc. develops targeted anticancer therapeutics using its expertise in cancer biology, monoclonal antibodies and the creation and attachment of potent cell-killing agents. The Company's TAP technology uses antibodies to deliver one of ImmunoGen's proprietary cell-killing agents specifically to cancer targets. In addition to the Company's proprietary clinical pipeline, ImmunoGen collaborators Genentech, sanofi-aventis, Biogen Idec, and Biotest also are testing TAP compounds in the clinic, and a naked antibody is in clinical trials through the Company's collaboration with sanofi-aventis.

SOURCE: ImmunoGen, Inc.

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