| umls-concept:C0025149 | skos:definition | MSH: A malignant neoplasm that may be classified either as a glioma or as a primitive neuroectodermal tumor of childhood (see NEUROECTODERMAL TUMOR, PRIMITIVE). The tumor occurs most frequently in the first decade of life with the most typical location being the cerebellar vermis. Histologic features include a high degree of cellularity, frequent mitotic figures, and a tendency for the cells to organize into sheets or form rosettes. Medulloblastoma have a high propensity to spread throughout the craniospinal intradural axis. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2060-1),CSP: malignant cerebellar neoplasm composed of undifferentiated neuroepithelial cells that may be classified either as a glioma or as a primitive neuroectodermal tumor of childhood; tumor occurs most frequently in the first decade of life with the most typical location being the cerebellar vermis.,NCI: A malignant brain tumor that begins in the lower part of the brain and that can spread to the spine or to | lld:umls |
