A team of researchers has identified and located a population of stem-like cells that initiates and maintains Group 3 medulloblastoma (Gr3-MB) in the developing brain. Gr3-MB is one of the most aggressive forms of brain cancer in children and is associated with metastatic spread and poor survival. The researchers showed that eliminating the small population of stem-like cells present in Gr3-MB tumors led to tumor shrinkage in preclinical models. Although more research is needed, this novel approach may lead to new ways to treat children with Gr3-MB.