Dr. Wainberg details the practice-changing implications of the MATTERHORN study event-free survival data. We recently spoke with expert clinicians about the rapidly changing treatment landscape in upper gastrointestinal cancers. Dr. Kelly discusses the first overall survival results from CheckMate 577 and how they compare to previous DFS results. Adjuvant nivolumab provides durable long-term DFS benefit and shows an OS advantage in patients with resected EC/GEJC. Pembro plus lenvatinib with chemo may improve progression-free survival in patients when compared with the standard of care. Researchers define characteristics of e-GISTS and determine whether endoscopic resection is a treatment option for patients. Palliative EBRT can reduce physician-evaluated and patient-reported dysphagia symptoms in patients with incurable disease. Pembrolizumab previously received accelerated approval for this indication in 2021 based on interim results from KEYNOTE-811. The safety profile of the combination was consistent with known profiles, and no new safety findings were observed. Dr. Cytryn shares insights on the implications of recent data from the DESTINY-Gastric04 and MATTERHORN trials. The approval is based on positive results from the phase III RATIONALE-306 study. Patients with refractory UGI cancers who participated in phase I trials saw benefits in late-line settings. Dr. Cytryn summarizes a trial in progress investigating a novel immunotherapy combination for gastroesophageal adenocarcinoma The panel discusses considerations around treating peritoneal gastric cancer, including the role of HIPEC. In part three of their discussion, the panel explores the role of ADCs in treating gastric and esophageal cancers. The panelists discuss the impact of biomarkers on personalized gastric cancer care, including ctDNA, claudin 18.2, and PD-L1. An expert panel of GI oncologists debates recent advancements in biomarker-driven strategies for GI cancer care. Dr. Cytryn reviews the FDA approval of tislelizumab and shares thoughts on its clinical impact. Tislelizumab is a monoclonal antibody with a high affinity and binding specificity against programmed cell death protein 1. The FDA has approved nivo for subcutaneous injection for all solid tumors for which nivo is indicated as a monotherapy.