Medulloblastoma is a series of tumors found in the cerebella. It is more common in children than adults. It is the most common malignant tumor affecting children. The tumors usually occur in the cerebellum and posterior fossa of the brain. Medulloblastoma has been known to metastasize to the bone. It can also spread throughout the Central Nervous System.
A common complication of this tumor is hydrocephalus. Since it spreads through the CSF it causes intracranial pressure. Some treatments of the hydrocephalus compression include a ventricular shunt or an endoscopic third ventriculostomy. (http://emedicine.medscape.com)
Axial CT image of lesion in posterior fossa
Sagittal MRI image showing medulloblastoma in cerebellum
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