Samuel Cytryn, MD, discusses two major recent developments in gastric and gastroesophageal cancer research: the DESTINY-Gastric04 and MATTERHORN trials. DESTINY-Gastric04 is a global phase III study comparing trastuzumab deruxtecan with ramucirumab and paclitaxel in the second-line setting, demonstrating promising survival benefits. The MATTERHORN trial evaluates the addition of durvalumab to perioperative FLOT chemotherapy for locally advanced gastric and gastroesophageal cancer, with early results indicating an improvement in event-free survival.