<prompt> Which of the following childhood tumors show extracranial metastasis?Glioblastoma multiformeMedulloblastomaChoroid plexus carcinomaEpendymoblastoma  <response>: b. MedulloblastomaRef: Nelsons 20e p 2453-2460, Ghai 8e 612-613Among 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. 