NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,208 terms related to cancer and medicine.

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medulloblastoma
(MED-yoo-loh-blas-TOH-muh)
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).