This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
[{'content': 'Spindle cell tumor is \nSelect and explain. \nA. Leiomyoma, B. Schwannoma, C. Fibrous histiocytoma, D. Alveolar soft tissue sarcoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Alveolar soft pa sarcoma (ASPS) is a rare, poor prognosis neoplasm of unknown histogenesis with a distinctive histology, specific molecular characteristics, and unique clinical behaviors. ASPS generally develop in younger patients. Unlike other soft tissue sarcomas, ASPS also metastasizes to the brain. Ramdas Nayak 2nd edition page no. 371', 'role': 'assistant'}]