<prompt> All of the following are true about medulloblastoma except:Occur predominantly in childrenMost common site is VermisCarmustine and vincristine are used for recurrences and in children 3 years to avoid radiation therapyRadiotherapy is the main treatment modality  <response>: Medulloblastoma Most common malignant brain tumor of childhood- MC site - Cerebellum vermis In adults most common site is Lateral Cerebellar hemisphere Most radiosensitive brain tumor Has CSF spread - given Craniospinal irradiation. Treatment - Despite of extreme radiosensitivity, it should be surgically excised. - Surgical excision should be followed by radiotherapy andchemotherapy. - Carmustine BCNU and vincristine are primarily used for recurrences, in poor- risk patients, and in children 3 years to avoid radiation therapy. 