Medulloblastoma
Medulloblastoma (MB) is the second most common cancer in children and the most common posterior fossa tumor. Presenting symptoms are key to an early diagnosis and may include signs and symptoms of hydrocephalus, cranial neuropathies, ataxia, or nystagmus. MRI of the neuraxis should be completed to aid in operative planning. Preoperative relief of hydrocephalus may be necessary, depending on the patient’s condition. Complete resection is the primary goal, and extent of resection, patient age, ependymal spread, and tumor subtype are all important predictors of overall survival. Spine imaging and lumbar puncture are standard to complete the initial work-up. Chemotherapy and radiation are used for adjuvant therapy after surgical resection. The need for postoperative shunt placement is rare, as most children can be weaned from their ventriculostomy catheters or an endoscopic third ventriculostomy can be performed.