Your Skull Is Hiding a Secret Organ, and Scientists Just Found It

Researchers at Washington University School of Medicine in St. Louis, publishing in Nature, discovered lymph node-like structures in the bone marrow of mouse skulls that act as specialized immune centers for the brain. In mice with glioblastoma, disrupting these structures caused tumors to grow faster; delivering immune-boosting proteins through a gel applied under the scalp strengthened antitumor responses and prolonged survival.

The findings are from mouse models; human application and clinical translation will require further research and testing.