This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': 'A patient presents 1 month after a benign right breast biopsy with a lateral subcutaneous cord felt just under the skin and causing pain. The etiology of this condition is? \nSelect and explain. \nA. Fat necrosis, B. Infection, C. Superficial thrombophlebitis, D. Suture granuloma', 'role': 'user'}, {'content': "Answer: C \nExplanation: This entity is known as Mondor's disease and is caused by superficial thrombophlebitis usually induced by surgery, infection, or trauma. The process is self-limiting and resolves within 2-10 weeks.", 'role': 'assistant'}]