Abstract
We describe a rare case of an iliopsoas bursitis occurring with rapid and severe destruction of a rheumatoid hip joint. The iliopsoas bursitis developed within several days after walking became impaired. The process could be explained as follows: the acute compression of the femoral head and destruction of the top of the acetabulum might be attributed to the severely increased pressure within the hip joint. Due to that high pressure, there may have been a leak into the iliopsoas bursa from the hip joint, and then debris and fluid overflowed into the iliopsoas bursa, generating a giant cyst diagnosed as iliopsoas bursitis. We performed total hip arthroplasty, and there has been no sign of recurrence of this bursitis in the 6 months after the operation.
