Medulloblastomas and arachnoidal sarcomas.
D000293:Adolescent; D000328:Adult; D001099:Arachnoid; D001932:Brain Neoplasms / Q000473:pathology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008527:Medulloblastoma / Q000453:epidemiology* / Q000473:pathology* / Q000601:surgery; D009362:Neoplasm Metastasis; D011379:Prognosis; D012509:Sarcoma / Q000473:pathology*