WALTHAM, Mass.--(BUSINESS WIRE)--ImmunoGen, Inc. (Nasdaq: IMGN), a biopharmaceutical company that develops targeted anticancer therapeutics, today announced the presentation of clinical data from a Phase Ib/II trial conducted by Roche and Genentech to investigate the safety and preliminary efficacy of trastuzumab-DM1 (T-DM1) used in combination with Roche’s investigational antibody, pertuzumab. The findings were reported at the 2010 Annual Meeting of the American Society of Clinical Oncology (ASCO) being held in Chicago, IL (abstract #1012).