Synovial chondromatosis.

A report is given of 22 patients suffering from synovial chondromatosis. Sixteen patients were operated on. The aetiology and diagnostic criteria are discussed with regard to the literature. The X-ray may be characteristic or may alternatively be normal. The symptoms and the physical signs are outlined. If an indication for treatment is found, removal of all free bodies and excision of the accessible part of the synovial membrane is advised.