KEYNOTE-604: Pembrolizumab (pembro) or placebo plus etoposide and platinum (EP) as first-line therapy for extensive-stage (ES) small-cell lung cancer (SCLC).

9001Background: Pembro monotherapy showed durable antitumor activity as third-line or later therapy for metastatic SCLC, leading to FDA approval in that setting. KEYNOTE-604 was a double-blind, pha...