60-year-old female with right knee traumatic injury/twisting w/persistent pain, instability x 3 months. MENISCI: Best seen on the coronal sequences is replacement of the body of the lateral meniscus with increased signal intensity indicating a near complete or complete radial tear. There is additional attenuation and signal abnormality within the posterior horn of the lateral meniscus compatible with additional complex tearing. There is a bandlike fragment of low signal intensity adjacent to the anterior cruciate ligament which may represent a displaced meniscal fragment. The anterior horn of the lateral meniscus appears intact.There is blunting of the free edge of the posterior horn of the medial meniscus indicating a partial thickness radial tear with increased signal intensity extending from the tear along the undersurface of the posterior horn indicating additional fraying. There is increased signal intensity and fragmentation of the anterior horn of the medial meniscus at its root indicating degeneration and tearing. The body of the medial meniscus appears slightly small but is otherwise intact.ARTICULAR CARTILAGE AND BONE: There is full-thickness cartilage loss along the posterior aspect of the lateral tibial plateau and near full-thickness cartilage loss along the posterior aspect of the lateral femoral condyle adjacent to the torn meniscus. There are also small lateral compartment osteophytes. The articular cartilage of the medial and patellofemoral compartments appears relatively normal accounting for the patient's age.LIGAMENTS: There is mild high signal intensity within the anterior cruciate ligament which may reflect mild degeneration but we see no tear. The posterior cruciate ligament, medial collateral ligament and lateral collateral ligament appear intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Medial and lateral meniscal tears as described above.2.Osteoarthritic changes affecting the lateral compartment.3.Baker's cyst.