The American Association for Cancer Research (AACR) Annual Meeting 2026 serves as a central gathering for the global cancer research community, bringing together scientists, clinicians, healthcare professionals, survivors, patients, and advocates to exchange the latest breakthroughs in cancer science and medicine. Covering a broad spectrum of topics, from population science and prevention to cancer biology, translational and clinical research, survivorship, and advocacy, the 2026 Meeting in San Diego, CA showcased cutting-edge discoveries from leading researchers worldwide.