Subtrochanteric osteotomy with intramedullary fixation for arthroplasty of the dysplastic hip. A case report.

Hip dysplasia in its end stage may require arthroplasty, and often extreme femoral anteversion is present. To correct rotational alignment of knee and hip joints yet preserve part of the femoral neck during total hip arthroplasty, a subtrochanteric derotational osteotomy was performed in a 37-year-old woman. Intramedullary fixation of the osteotomy was secured using a custom-fitted femoral component alone.