Secondary synovial osteochondromatosis
Chronic pain and decreased ROM in the left knee. pain and swelling flared up after a minor trauma 2 weeks ago.
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There is medial and lateral tibial femoral joint space narrowing with associated subchondral sclerosis and marginal osteophytes.There is a large joint effusion. The articular surfaces are eburnated.
There are multiple ossific fragments in the knee joint predominantly in the suprapatellar region indicative of synovial osteochondromatosis. There is also chondrocalcinosis of the menisci.
Features of secondary osteochondromatosis and also chondrocalcinosis secodnary to severe osteoarthritis in the knee joint.