Figure 2 (a, b) Preoperative plain radiograph and computed tomography scan show destruction of the femoral head and acetabulum and fibrous ankylosis as a result of septic arthritis of the right hip in childhood. The radiograph shows evidence of hip adduction, flexion (nonvisualized obturator foramen), and internal rotation (nonvisualized lesser trochanter). (c, d) Radiographs during treatment show the proximal and distal osteotomies, lengthening, and varization through the distal osteotomy. The knee joint-orientation line is horizontal, and proximal extension of the mechanical axis of the distal femur passes through the acetabulum. (e) Follow-up radiograph shows the consolidated osteotomies and maintained alignment.