Merck details Keytruda's Herceptin combo stomach cancer win

The FDA has granted Merck the go-ahead based on initial data from its first 264 patients that are enrolled in a study that combines Keytruda with Roche’s Herceptin and chemotherapy. This treatment had tumors shrink in 74.4% of patients with newly diagnosed, HER2-positive gastric or gastroesophageal junction cancer. That is considerably more than the 51.9% for the standard-of-care Herceptin-chemo treatment.