Synovial chondromatosis.
D000328:Adult; D002114:Calcinosis; D002358:Cartilage, Articular / Q000473:pathology; D002812:Chondroma; D006621:Hip Joint / Q000000981:diagnostic imaging; D006801:Humans; D007592:Joint Diseases; D007718:Knee Injuries / Q000000981:diagnostic imaging; D008297:Male; D008679:Metaplasia; D011859:Radiography; D013583:Synovial Membrane