CAMBRIDGE, Mass.--(BUSINESS WIRE)--April 27, 2006--ImmunoGen, Inc. (Nasdaq:IMGN - News) will host a conference call at 4:30 p.m. EDT on Thursday, May 4, 2006 to discuss the Company’s financial results for the quarter ended March 31, 2006 -- the third quarter of ImmunoGen’s 2006 fiscal year. Management also will provide an update on the Company.