| medulloblastoma |
a malignant, highly radiosensitive cerebellar tumor composed of undifferentiated neuroglial cells and usually considered a type of primitive neuroectodermal tumor. Most medulloblastomas occur in children and arise in or adjacent to the roof of the fourth ventricle.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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