Female 49 years old; Reason: Evaluate for ligament or meniscal abnormalities, any bony abnormalities History: one month of knee pain, large joint effusion MENISCI: There is focal blunting of the free edge of the posterior horn of the medial meniscus, indicating a partial thickness radial tear. Linear increased signal intensity in the peripheral fibers of the posterior horn of the medial meniscus extending to the femoral articular surface likely represent an interface with an intracapsular ligament rather than a true tear. There is mild blunting of the free edge of the body of the medial meniscus, likely reflecting chronic attritional tearing, as well as globular increased signal reflecting intrasubstance degeneration. The medial meniscus is mildly extruded medially. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is moderate degeneration of the articular cartilage of the medial compartment, particularly along the weight-bearing surface of the medial femoral condyle, with small foci of full-thickness cartilage degeneration. Tiny near-full-thickness to full-thickness defects are present in the articular cartilage of the medial tibial plateau. Underlying edema-type signal is present in the medial tibial plateau and medial femoral condyle. Partial-thickness cartilage degeneration is present along the medial facet of the patella. Near-full-thickness to full-thickness focal cartilage defects are noted along the medial facet of the femoral trochlea.LIGAMENTS: The cruciate and collateral ligaments are intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Osteoarthritic changes of the knee, particularly at the medial tibiofemoral and patellofemoral compartments, with small foci of full-thickness cartilage degeneration.2. Partial-thickness radial tear of the posterior horn of the medial meniscus with medial extrusion of the body of the medial meniscus.3. Normal-appearing ligaments.4. Moderate to large joint effusion.