Definition of "medulloblastoma" [medulloblastoma]

• A malignant type of brain tumour that originates in the cerebellum (noun)

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• "In adults the pathway is less active, but in recent years, researchers have linked its malfunction—due to mutations and other mechanisms—to several cancers, including basal-cell carcinoma and a rare brain tumor that generally affects children called medulloblastoma."
• "The most important childhood brain tumors are medulloblastoma, which is diagnosed in approximately one hundred young patients each year in Germany, and pylocytic astrocytoma, which is diagnosed in about 200 children each year."
• "Telomerase activity appears to be essential for certain tumor survival and growth, such as medulloblastoma -- a highly malignant cancer of the central nervous system."