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': 'Distressing Complication after modified radical mastectomy? \nSelect and explain. \nA. Lymphedema, B. Axillary vein thrombosis, C. Seroma, D. Death', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Complications of Mastectomy\n• Seroma\n−− MC complication, beneath skin flaps and axilla, occurs in 30% cases\n−− Catheter is retained until drainage is <30 ml/day\n• Wound infection\n−− Majority are due to skin flap necrosis\n• Lymphedema\n−− Occurs less frequently with the standard axillary dissections.\n−− Extensive LN dissection, radiation therapy, presence of positive LNs, obesity are predisposing factors.\n• Injury to Long Thoracic (Motor) Nerve\n−− Seen in 10% of all cases.\n−− Result in a palsy of the Serratus anterior muscle (classical winged scapula)\n• Injury to Thoracodorsal Nerve:\n−− Leads to palsy of the latissimus dorsi muscle.\n• Redundant Axillary Fat Pad', 'role': 'assistant'}]