medulloblastoma

Definition / meaning of medulloblastoma

A malignant brain tumor that begins in the lower part of the brain and that can spread to the spine or to other parts of the body. Medulloblastomas are a type of primitive neuroectodermal tumor (PNET).

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Find More About 'medulloblastoma'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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