78 year old female with a history of osteoarthritis presents with right knee pain and swelling after a fall. MENISCI: There is attenuation of the posterior horn and body of the medial meniscus that likely reflects chronic extensive degenerative tearing in the absence of known prior surgery. The anterior horn appears relatively normal. There is mild intrasubstance degeneration of the lateral meniscus, but we see no tear.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the knee, particularly the patellofemoral joint, much of which is devoid of articular cartilage. Additional full thickness and partial thickness cartilage degeneration affects the medial and lateral compartments. There are associated degenerative subchondral signal changes that particularly affect the patellofemoral and medial compartments. We see no fracture. LIGAMENTS: The cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1. Severe osteoarthritis of the knee.2. Extensive degenerative tearing of the medial meniscus.3. Joint effusion, small Baker cyst, and other findings as above.