Merck says Phase 3 KEYNOTE-522 trial met its overall survival endpoint

Merck announced that the Phase 3 KEYNOTE-522 trial evaluating KEYTRUDA, Merck’s anti-PD-1 therapy, met its overall survival endpoint, in combination with chemotherapy as pre-operative treatment and then continuing as a single agent after surgery for the treatment of patients with high-risk early-stage triple-negative breast cancer. At a pre-specified interim analysis conducted by an independent Data Monitoring Committee, KEYTRUDA demonstrated a statistically significant and clinically meaningful improvement in OS compared to pre-operative chemotherapy. The safety profile of KEYTRUDA was consistent with that observed in previously reported studies; no new safety signals were observed. Results will be presented at an upcoming medical meeting and shared with regulatory authorities.