Washington University School of Medicine in St. Louis

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As of September 2026: Research institution leading the discovery

For decades, textbooks treated the brain as 'immune privileged' - isolated from the body's defenses. Researchers at Washington University School of Medicine in St. Louis found lymph node-like structures inside the skull bone marrow of mice. These hubs respond to brain cancer within two days, before lymph nodes anywhere else stir.

Updated Sep 17