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': 'Causes of non-healing of enterocutaneous fistula are all except \nSelect and explain. \nA. Epithelialization of track, B. Track length >3 cm, C. Acute inflammatory disease, D. Radiation enteritis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: • Enterocutaneous fistulas are most commonly iatrogenic, usually the result of a surgical misadventure.\nSurgical misadventure leading to Enterocutaneous fistula :\n• Anastomotic leakage.\n• Injury of the bowel or blood supply.\n• Laceration of the bowel by wire mesh or retention suture.', 'role': 'assistant'}]