59-year-old woman with right knee instability. Evaluate for ligamentous injury. MENISCI: There is marked degeneration of both menisci.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritic changes affect the knee, most prominently affecting the medial tibial plateau. There is severe degeneration of the articular cartilage diffusely, affecting the articular surfaces of the femur, tibia and patella. Tricompartmental osteophytes are noted, most prominent in the medial tibiofemoral compartment.LIGAMENTS: Anterior and posterior cruciate ligaments are intact. Medial collateral ligament and lateral collateral complex are intact. Mild edema around the lateral collateral ligament may represent a mild sprain.EXTENSOR MECHANISM: The quadriceps tendon and patellar tendon are intact.ADDITIONAL
Severe degenerative changes affect the knee. There is a small joint effusion.