Which of the following childhood tumors show extracranial metastasis?: (A) Glioblastoma multiforme, (B) Medulloblastoma, (C) Choroid plexus carcinoma, (D) Ependymoblastoma
Answer is B. b. Medulloblastoma(Ref: Nelson's 20/e p 2453-2460, Ghai 8/e 612-613)Among the given options, Medulloblastoma is the most malignant brain tumor seen in children. Up to 30% of patients with medulloblastoma present with neuroimaging evidence of leptomeningeal spread.