65 year old female with history of right knee pain. MENISCI: There is intrasubstance degeneration of the medial meniscus, but we see no discrete meniscal tear. There is poorly defined signal intensity particularly within the anterior horn of the lateral meniscus compatible with intrasubstance degeneration.ARTICULAR CARTILAGE AND BONE: There is severe osteoarthritis particularly at the patellofemoral articulation with near complete loss of all articular cartilage as well as subchondral cysts and bone marrow edema. There is relatively mild degenerative change affecting the tibiofemoral compartment. There are tricompartmental osteophytes. There are cyst-like lesions within the tibial plateau and posterior distal femur likely degenerative in etiology.The femoral trochlea is shallow and even convex superiorly which may reflect an underlying dysplasia. There is slight lateral translation of the patella.LIGAMENTS: There is increased signal intensity and thickening of the ACL compatible with mucoid degeneration. The PCL, MCL, and LCL are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Severe osteoarthritis predominantly affecting the patellofemoral joint with a loose body as well as degeneration of the menisci and ACL.