Haematoma of pectineus muscle after total hip arthroplasty.

The complications of total hip arthroplasty (THA) during the immediate postoperative period consist mainly in dislocation of the prosthesis, haematomas under antocoagulants, early infections, dismantling of osteotomy, neurological injury, heterotopic ossification and delayed restoration of the range of motion of the hip joint. We present here an infrequently described case of haematoma of the pectineus muscle following THA. Haematomas are not described in literature except in rare cases of compressive haematoma associated with neurological injury. In our case, the intraoperative blood losses were not particularly massive, there were no anticoagulation accident or postoperative trauma and no secondary deglobulinization. The question to be considered is that of a possible stretching of the pectineus during hip dislocation, and possibly during the surgical procedures for the implementation of the prosthesis with increased length, as it is the case here. Haematomas of the pectineus are probably underdiagnosed as they imitate other, more known, symptomatologies.