81-year-old female with pain, swelling, and decreased range of motion. MENISCI: There is a complete radial tear through the posterior horn of the medial meniscus near its root. There is minimal medial extrusion of the body of the medial meniscus. The anterior horn appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is diffuse thinning of the articular cartilage of the patella, particularly along the medial facet, with areas of near full-thickness cartilage degeneration. There is also partial thickness degeneration of the articular cartilage of the femoral trochlea. There is moderate diffuse thinning of the articular cartilage of the medial compartment with foci of near full thickness degeneration. The articular cartilage of the lateral compartment is relatively spared. The bone marrow signal intensity is within normal limits.LIGAMENTS: The MCL is perhaps slightly thickened, proximally, which may represent an old injury, but the ligament otherwise appears normal. The ACL appears intact. The PCL appears intact. The LCL appears intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Complete radial tear of the posterior horn of the medial meniscus.2. Osteoarthritis, joint effusion, and Baker's cyst.3. Other findings as described above.