Female 59 years old; Reason: knee pain and instability MENISCI: There is fragmentation of the posterior horn of the lateral meniscus, with lateral extrusion of the body of the lateral meniscus. Increase signal within the anterior horn of the lateral meniscus likely represents degeneration. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the knee with foci of full thickness cartilage loss in the lateral tibiofemoral compartment and patellofemoral compartment. The lateral facet of the patella and lateral facet of the femoral trochlea are nearly devoid of cartilage. Reactive bone marrow changes and subchondral cyst formation are present in the lateral and midline tibial plateau, lateral femoral trochlea, and throughout the patella. There is mild cartilage degeneration in the medial tibiofemoral compartment, without fluid-filled defects. Tricompartmental osteophytes are present. LIGAMENTS: No significant abnormality noted. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Severe osteoarthritic changes, with areas of full thickness cartilage loss, as described above.2. Fragmentation of the posterior horn of the lateral meniscus, with lateral extrusion of the body of the lateral meniscus.