39-year-old female with right knee pain. Suboptimal evaluation secondary to patient motion artifact.MENISCI: The medial meniscus appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There are multiple foci of osteonecrosis within the distal femur, proximal tibia and patella. Although some of these foci of osteonecrosis extend to the articular surface, we see no subchondral fracture or articular surface collapse. There is diffuse degeneration of the articular cartilage of the patella with full-thickness defects and delamination along the median eminence. The articular cartilage of the femoral trochlea is relatively spared. The articular cartilage of the medial and lateral compartments appears relatively spared.LIGAMENTS: The ACL appears intact. The PCL appears intact. The MCL appears intact. There is minimal increased signal intensity within the femoral attachment of the lateral collateral ligament proper which may represent focal degeneration.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Osteonecrosis and patellar cartilage degeneration as described above.