Fig. 1. A female patient who underwent total hip arthroplasty at the age of 32 years. (A) The anteroposterior radiograph taken at the 7-year follow-up demonstrates polyethylene wear and osteolysis. (B) The liner and head were exchanged. (C) At the 6.5-year follow-up after the liner and head exchange, the radiograph shows the worn-out polyethylene liner and osteolysis. (D) Anteroposterior radiograph taken at 4 years after re-revision surgery for liner and head exchange. Postop: postoperative.