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. Dr. Cytryn provides insights on the FDA approval of zolbetuximab and how it will impact clinical practice. Both of the double-blind, multicenter trials evaluated the major efficacy outcomes of PFS and OS. The phase III study found that regorafenib improved overall survival in patients with refractory advanced gastric cancer. Tislelizumab shows significant survival benefits in first-line treatment for gastric and esophageal cancers. FDA approval of the first and only CLDN18.2-targeted treatment follows two successful phase III clinical trials. For postoperative morbidity and mortality, surgery alone had the highest probability rate. Dr. Weinberg provides a recap of all of the GI oncology data of practice-changing potential presented at ESMO 2024. FLOT and nivo seems to be associated with improved efficacy, whereas chemo followed by IO therapy is insufficient. Dr. Janjigian shares an overview of the DESTINY-Gastric03 study and the history of T-Dxd for gastric and GEJ cancers. Trastuzumab deruxtecan, pembrolizumab, and chemotherapy shows benefits in advanced or metastatic esophageal, gastric, or GEJA These data may support the approval of pembro plus trastuzumab and chemo in patients with HER2+ metastatic G/GEJ cancer. Standard treatment for ESCC includes esophagectomy, but the surgery is often linked to complications and reduced QoL.