抄録
The monoarticular type of rheumatoid arthritis is very rare, especially in the hip joint. A 64-year-old woman who had suffered left hip joint pain for three years was admitted and from laboratory investigations was diagnosed as having infectious arthritis. A synovial biopsy was done, but the histology was characteristic of non-specific chronic synovitis. One year later the patient was admitted again because of severe pain of the left hip joint. A monoarticular type of rheumatoid arthritis was strongly suspected and synovectomy was chosen as the treatment. The synovium obtained from surgery showed the typical pathological changes of rheumatoid arthritis. Over the next seven months laboratory findings returned to normal and the spontaneous pain disappeared.
