Serial radiographs of our patient. (a) A radiograph taken immediately after total hip arthroplasty in 1998 shows excellent incorporation of the cementless cup within the acetabulum. (b) A radiograph taken immediately after the accidental fall in 2008 shows no obvious fracture or osteolytic lesion. (c) A radiograph taken 1 year after the fall shows a small osteolytic lesion (arrow). (d) A radiograph on admission in 2010 shows an extended osteolytic lesion in the superolateral side of the ilium and the acetabulum (arrows) and no obvious migration of the cup or screws. (e) A post-operative radiograph taken in 2011 after resection of the hematoma lesion and cup revision surgery.