Reason: r/o meniscus tear History: pain MENISCI: The lateral meniscus appears intact. There is poorly defined intermediate signal within the posterior horn of the medial meniscus suggesting intrasubstance degeneration, but we see no discrete tear. There is vertically oriented linear signal within the periphery of the posterior horn of the medial meniscus, seen on a single image, likely representing the interface of the meniscus with the central band of the posterior oblique ligament.ARTICULAR CARTILAGE AND BONE: There is a full-thickness defect of the articular cartilage of the femoral trochlea, centrally and inferiorly, with additional near full-thickness degeneration of the articular cartilage along the medial facet of the femoral trochlea, inferiorly, with underlying subchondral cyst formation. There is mild superficial degeneration of the articular cartilage of the patella, but we see no full-thickness defect. There is also degeneration of the articular cartilage of the medial tibiofemoral compartment with possible full-thickness cartilage loss along the medial femoral condyle above the posterior horn of the meniscus.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Osteoarthritis with a large joint effusion.2. Mild degeneration of the medial meniscus, but no discrete tear of either meniscus.