Merck & Co., Inc. has bolstered its chances of winning US Food and Drug Administration approval for Keytruda (pembrolizumab) in neoadjuvant triple-negative breast cancer (TNBC) with Phase III trial data showing a benefit in event-free survival. But the data do not support the use of a surrogate endpoint the company unsuccessfully tried to use before.
In May, Merck had announced that the KEYNOTE-522 study testing Keytruda and chemotherapy before surgical resection followed by the PD-1...