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': 'Tylectomy literally means \nSelect and explain. \nA. Excision of a lump, B. Excision of a breast, C. Excision of LN, D. Excision of skin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lumpectomy (sometimes known as a tylectomy, paial mastectomy, breast segmental resection or breast wide local excision) is a surgical removal of a discrete poion or "lump" of breast tissue, usually in the treatment of a malignant tumor or breast cancer. It is considered a ble breast conservation therapy, as the amount of tissue removed is limited compared to a full-breast mastectomy, and thus may have physical and emotional advantages over more disfiguring treatment. Ref: Internet', 'role': 'assistant'}]