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': 'A female undergone surgery for left breast cancer 3 yrs back now developed blue nodule on same side \nSelect and explain. \nA. Lymphangiosarcoma, B. Recurrence, C. Hemangioma, D. Cellulitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. LymphangiosarcomaAngiosarcoma is a vascular tumor which may arise de novo in the breast or as a complication of the radiation therapy.', 'role': 'assistant'}]