ImmunoGen Plunges After Phase III Ovarian Cancer Treatment Fails to Hit PFS Endpoint

Shares of Waltham, Mass.-based ImmunoGen, Inc. have plunged nearly 50 percent in premarket trading after the company’s Phase III ovarian cancer treatment failed to meet the primary endpoint of progression-free survival. ImmunoGen’s FORWARD I trial was testing the safety and efficacy of mirvetuximab soravtansine compared to chemotherapy in patients with folate receptor alpha (FRα)-positive, platinum-resistant ovarian cancer.
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