This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Which of the following is true about medulloblastomaa) Radiosensitive tumorb) Spreads through CSFc) Surgical Rx not doned) Occurs in young age groupe) It is a supratentorial tumor \nSelect and explain. \nA. acd, B. abd, C. abc, D. ab', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Medulloblastoma \n\nIts a primitive-neuroectodermal tumor (P-NET)\nAge\n\n-\xa0\xa0\xa0\xa0 primarily childhood tumor\n-\xa0\xa0\xa0\xa0 its the most common primary brain tumor in children (Ref Sabiston 17/e, p 2145]\n\nLocation\ninfratentorial\nmost common site is yentas (75%) (most common site in adults is lateral cerebellar hemisphere)\nMedulloblastomas tend to metastasize early, widely and massively throughout the CSF.\nTreatment consists of surgical resection followed by radiation therapy.\nMedulloblastoma is moderately radiosensitive.', 'role': 'assistant'}]