64-year-old female with persistent right knee pain. MENISCI: There is a radial tear of the posterior horn of the medial meniscus, at or just medial to its root, that appears to involve the full thickness of the meniscus. There is globular signal within the posterior horn and body of the medial meniscus indicating intrasubstance degeneration. There is slight medial extrusion of the body of the medial meniscus. There is intrasubstance degeneration of the lateral meniscus, but we see no tear.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the patellofemoral joint with full-thickness cartilage loss, particularly along the lateral facet of the patella and femoral trochlea with underlying subchondral cysts. There are multiple near full-thickness to full-thickness cartilage defects also affecting the tibiofemoral articulations with small subchondral cysts and mild degenerative edema type signal within the tibial plateau and medial femoral condyle. There are tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact. There is a thin focus of fluid signal intensity deep to the iliotibial band extending superficial to the lateral collateral ligament proper that may reflect a mild bursitis.EXTENSOR MECHANISM: The extensor mechanism appears intactADDITIONAL
1. Full-thickness radial tear of the posterior horn of the medial meniscus at or near its root.2. Severe osteoarthritis of the patellofemoral joint with moderate osteoarthritis of the tibiofemoral compartments.3. Fluid/edema along the iliotibial band may reflect a bursitis.