Fig 6.

(A) With the patient in the right lateral decubitus position, an incision for the modified Gibson approach is marked on the left hip. The patient’s previous incision from an intermedullary nail for a femur fracture is also marked. (B) After incision and soft tissue dissection the heterotopic ossification (HO) is visible within the insertions of the gluteus medius and minimus, circled in black. (C) HO visible on an anteroposterior radiograph of the left hip, circled in red, just superior to the greater trochanter and lateral to the femoral head of the left hip. (D) HO visible on an axial cut of the computed tomography (CT) scan, marked in purple, lateral to the left femoral head. (E) HO visible on a 3-dimensional CT scan of the left hip, circled in red.