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: Orthopaedics
[{'content': 'Kocher Langenbeck approach for emergency acetabular fixation is done in all Except - \nSelect and explain. \nA. Open fracture, B. Progressive sciatic nerve injury, C. Recurrent dislocation inspite of closed reduction and traction, D. Morel - Lavallee lesion', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Morel - Lavalle lesion is a localized area of subcutaneous fat necrosis over the lateral aspect of hip caused by same trauma that causes the acetabular fracture. The operation through it has been a/w a higher (12%) rate of post\xadoperative infection, wound dehiscence and healing by secondary intention. The presence of a significant Morel-Lavallee lesion can be suspected by hypermobility of the skin and subcutaneous tissue in the affected area from the shear-type separation of the subcutaneous tissue from the underlying fascia lata. Alternatively, some fractures can be treated through ilioinguinal approach, thus avoiding the affected area.\nTherefore, In the presence of Morel-Lavalle lesion posterior kocher langenbeck approach is avoided.', 'role': 'assistant'}]