Large synovial cyst of the pelvis containing rice bodies. A case report.

Although synovial pelvic cysts are very uncommon they enter into the differential diagnosis of presacral and ovarian cysts. In the elderly male whom we report, a large cyst arose from the hip and extended during a five year period to involve the entire pelvic cavity. The cyst, which contained a large number of "rice bodies" was excised surgically.