Radiographs of the right hip in a 10-year-old boy with SCFE. Anteroposterior (A) and lateral (B) radiographs immediately after ISF for chronic and stable type hips at 37 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. PTA had progressed to 56 degrees 18 months after surgery due to excessive retroversion of the femoral neck.