title: Neuroradiology of pediatric posterior fossa medulloblastoma.
abstract: Medulloblastoma of the cerebellum is a common intracranial neoplasm in children and presents many faces in medical imaging. Characteristic or classic features, such as increased attenuation on unenhanced CT, midline location and well defined margins, are commonly present in childhood cases of posterior foassa medulloblastoma, although atypical imaging features are being noted more frequently with the increased dependence on MR as the diagnostic modality of choice. Carefully performed CT and MR both initially provide suitable geography and characteristics, but MR is superior in the detection of pre- or post-operative neoplastic spread elsewhere in the subarachnoid space. Accurate establishment of disease extent is essential in planning both surgical resection and adjuvant therapy.
authors.affiliation: Department of Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada.
authors.forename: S I
authors.initials: SI
authors.lastname: Blaser
authors.forename: D C
authors.initials: DC
authors.lastname: Harwood-Nash
mesh_terms: D000328:Adult; D002528:Cerebellar Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D002648:Child; D005189:False Positive Reactions; D005500:Follow-Up Studies; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008527:Medulloblastoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D009367:Neoplasm Staging; D011183:Postoperative Complications; D013125:Spinal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000556:secondary; D014057:Tomography, X-Ray Computed / Q000379:methods