Solitary synovial osteochondroma of the knee: mimicking a giant loose body

Nuri Aydin,1 Kemal Gokkus,2 Cumhur Topal,1 Ahmet Turan Aydin21Uskudar State Hospital, Istanbul, Turkey; 2Memorial Antalya Hospital, Antalya, TurkeyAbstract: Solitary synovial osteochondromas are rarely seen. Usually arising from the juxta-articular soft tissues without attaching to the bone, these lesions can be large and show clinical and radiological features of a malignant process. This report is about a 64-year-old woman with no history of trauma. She had a history of dull pain and a progressive limited range of motion that had been ongoing for 3 years. An unusual presentation of an uncommon disease that is not widely known by orthopedic surgeons is reported.Keywords: solitary synovial osteochondroma, loose body, arthroscopy, knee joint, synovial chondromatosis