WALTHAM, Mass.--(BUSINESS WIRE)--ImmunoGen, Inc. (Nasdaq: IMGN) announced today the presentation of encouraging clinical findings with trastuzumab-DM1 (T-DM1) at the 2008 American Society of Clinical Oncology (ASCO) Annual Meeting taking place in Chicago, IL. T-DM1 comprises ImmunoGen’s DM1 cell-killing agent linked to Genentech's HER2-targeting antibody, trastuzumab. Genentech is developing T-DM1 under a collaboration agreement with ImmunoGen.