Follow-up of a 35-year-old male presenting with symptoms of hip impingement after steroid-induced ONFH; panel a: preoperative radiograph showing cam deformity in right femoral head; panel b: preoperative CT scan showing extent and location of cam deformity in the femoral head; panel c: MRI scan earlier in the course of disease-confirming changes of ONFH; panel d: clinical radiographs showing restricted hip motion due to cam deformity of femoral head; panel e: intraoperative picture showing cam deformity at femoral head–neck junction and preserved articular cartilage; panel f: intraoperative picture after femoral head osteochondroplasty; panels g and h: post-operative radiographs showing restoration of femoral head sphericity.