Female 56 years old with acute lateral right knee pain and swelling. Evaluate right knee for recurrent lateral meniscus tear vs. DJD. MENISCI: There is degeneration and fragmentation of the posterior horn and body of the lateral meniscus indicating complex tearing. Tearing also extends into the anterior horn with intermediate signal intensity tissue adjacent to the root of the anterior horn that may represent a displaced meniscal fragment. Globular and linear intrasubstance degeneration of the medial meniscus appears similar to the prior exam and there is perhaps mild fraying of the posterior horn but we see no discrete tear.ARTICULAR CARTILAGE AND BONE: There has been marked progression of osteoarthritis in the lateral compartment with much of the weightbearing surface of the lateral femoral condyle and tibial plateau devoid of cartilage with adjacent degenerative subchondral signal abnormality. There has also been progression of osteoarthritis affecting the medial compartment with osteophytes and chondral loss along the medial femoral condyle. Cartilage loss of the patella has also progressed with full-thickness cartilage loss along the lateral patellar facet.LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Progression of osteoarthritis particularly involving the lateral compartment with extensive tearing of the lateral meniscus and other findings as above.