Radiographs of the right hip in a 14-year-old boy with SCFE. Anteroposterior (A) and lateral (B) radiographs immediately after ISF for chronic and stable type hips at 38 degrees of PTA. A single screw was inserted from the medial point to the center of the epiphysis perpendicularly. Anteroposterior (C) and lateral (D) radiographs at physeal closure. Slippage of the epiphysis had progressed to 43 degrees of PTA 17 months after surgery.