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': 'TRUE about medulloblastoma is - \nSelect and explain. \nA. Highly radiosensitive, B. Surgery is the only treatment, C. Occurs in adult age group, D. Chemotherapy is useful', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans is \'a\' i.e. Highly radiosensitive Let\'s see each option one by one Option c - Medulloblastoma occurs predominantly in children. Option a & b Medulloblastoma is a highly malignant tumor and the prognosis for untreated patients is dismal, but it is an exquisitely radiosensitive tumor. - Its treatment involves aggressive surgical removal of tumor followed by irradiation of the brain. Option d (i.e. Chemotherapy is useful) - We had always thought this option to be wrong, but Schwaz surgery says that "Chemotherapy is commonly used as well". - Still we would go with option \'a\' as medulloblastoma is well known to be a highly radiosensitive tumor.', 'role': 'assistant'}]