Stress fracture of the medial wall of the acetabulum adjacent to a cementless acetabular component.

There are numerous potential causes of hip pain after total hip arthroplasty other than loosening or infection. A case is described that is consistent with stress fracture of the medial wall of the acetabulum after cementless acetabular revision. The clinical presentation, diagnosis, and treatment are described. This is an uncommon cause for localized groin pain after total hip arthroplasty, which should be considered particularly in an elderly woman with a relatively acute onset of symptoms after an increase in activity level.