This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'True about leimyosarcoma breast \nSelect and explain. \nA. Axillary lymph mode dissection is mandatory, B. Well encapsulated, C. Follow up not required, D. Mastectomy is mainstay treatment', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .LEIOMYOSARCOMA * It arises from smooth muscle. Cut section shows whorled appearance. * It is undetermined grade. * It is common in retroperitoneum and viscera, but can occur in limbs and skin. * Recurrence is common. It has got poor prognosis. * It can occur in the piloerector muscle of skin; inferior vena cava; pulmonary aery. * Desmin and actin are the most common immunohistochemical stains.leiomyosarcoma of breast is a well encapsulated tumour. ref:SRB&;s manual of surgery,ed 3,pg no 268', 'role': 'assistant'}]