Study of Pembrolizumab (MK-3475) Versus Placebo in Participants With Esophageal Carcinoma Who Are Receiving Chemotherapy and Radiation Therapy (MK-3475-975/KEYNOTE-975)
The purpose of this study is to assess the efficacy and safety of treatment with definitive chemoradiotherapy (dCRT) + pembrolizumab (MK-3475) compared to treatment with dCRT + placebo with respect to Overall Survival (OS) and Event-free survival (EFS) in: - participants with esophageal squamous cell carcinoma (ESCC), - participants whose tumors express Programmed Death-Ligand 1 (PD-L1) Combined Positive Score (CPS) ≥10, and - all participants. The primary study hypotheses are that dCRT+ pembrolizumab is better than dCRT + placebo with respect to: - OS in participants with ESCC, - OS in participants whose tumors express PD-L1 CPS ≥10, - OS in all participants, - EFS in participants with ESCC, - EFS in participants whose tumors express PD-L1 CPS ≥10, and - EFS in all participants.
Participants receive pembrolizumab or placebo PLUS one of two chemotherapy regimens PLUS radiation therapy for up to approximately one year. The chemotherapy regimens are either: - FP (5-fluorouracil [5-FU] + cisplatin) or - FOLFOX (5-FU + oxaliplatin + leucovorin or levoleucovorin).
- Esophageal Squamous Cell Carcinoma (ESCC)
- Gastroesophageal Junction Carcinoma (GEJC)
- Esophageal Adenocarcinoma (EAC)
Merck Sharp & Dohme Corp.
Unique Study ID