CASE REPORT
Subchondral insufficiency fracture of the femoral head after total knee arthroplasty in a patient with rheumatoid arthritis
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Hajime Yamanaka1 , Ken-ichiro Goto1, Yasuaki Murata1 and Kazutoshi Miyamoto1
| (1) |
Department of Orthopaedic Surgery, National Hospital Organization, Shimoshizu Hospital, 934-5 Shikawatashi, Yotsukaido 284-0003, Japan |
Received: 07 November 2005 Accepted: 16 February 2006
Abstract We report an 80-year-old woman with rheumatoid arthritis (RA) who was found to have subchondral insufficiency fracture of the right femoral head after total knee arthroplasty (TKA). Initially, plain radiographs showed no obvious changes, but magnetic resonance imaging (MRI) revealed an irregular, discontinuous, low-intensity band on T1-weighted images of the right hip. She underwent hemiarthroplasty of the hip. This report describes a rare case of subchondral insufficiency fracture of the femoral head after TKA in a patient with RA.
Key words Femoral head - Osteoporosis - Rheumatoid arthritis (RA) - Subchondral insufficiency fracture - Total knee arthroplasty (TKA) |
