Right knee swelling MENISCI: There is complex tearing of the anterior horn and body of the lateral meniscus with a perimeniscal cyst noted in the intercondylar notch. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There are scattered areas of cartilage loss and degeneration although no full-thickness defects are appreciated. This is most evident in the patellofemoral compartment where a near full-thickness defect is noted in the medial patellar facet (series 6 image 12/32). Additionally, there is edema of the medial patellar facet and lateral femoral condyle consistent with a pattern of patellar subluxation. The medial patellofemoral retinaculum is at least partially torn as a result. There is also dysplasia of the femoral trochlea.LIGAMENTS: The lateral collateral ligament is torn. The medial collateral ligament, ACL, and PCL are intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Findings consistent with transient patellar subluxation including at least partial tearing of the medial patellofemoral retinaculum, dysplasia of the femoral trochlea, and contusions of the inferomedial patella and lateral femoral condyle.2. Complex tearing of the lateral meniscus involving the body and anterior horn.3. Strain of the vastus intermedius muscle.4. Moderate joint effusion with associated synovitis.