WALTHAM, Mass.--(BUSINESS WIRE)--ImmunoGen, Inc. (Nasdaq: IMGN), a biotechnology company that develops targeted anticancer products using its antibody expertise and Targeted Antibody Payload (TAP) technology, today announced that the US Food and Drug Administration (FDA) has granted orphan drug designation to its IMGN901 compound when used for the treatment of Merkel cell carcinoma (MCC). Through a separate process, the European Union (EU) Committee for Orphan Medicinal Products (COMP) concurrently also granted IMGN901 orphan medicinal product designation for the treatment of MCC.