<prompt> Kocher Langenbeck approach for emergency acetabular fixation is done in all Except -Open fractureProgressive sciatic nerve injuryRecurrent dislocation inspite of closed reduction and tractionMorel - Lavallee lesion  <response>: 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 aw a higher 12 rate of postoperative 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.Therefore, In the presence of Morel-Lavalle lesion posterior kocher langenbeck approach is avoided. 