Male 18 years old with left knee pain and swelling, evaluate for acl tear, patellar fracture, contusion MENISCI: The menisci are normal in appearance.ARTICULAR CARTILAGE AND BONE: Increased T2 signal along the lateral condyle and medial patellar facet consistent with osseous contusions. No evidence of acute fracture.LIGAMENTS: Increased signal abnormality within the medial patellofemoral ligament with subtle fragmentation at the very edge of the articular cartilage of the medial patellar facet (901/23-24). Fluid surrounds the LCL complex without evidence of disruption. The ACL, PCL, and MCL are intact. EXTENSOR MECHANISM: Intact.ADDITIONAL
1. Possible transient patellar dislocation with a partial patellofemoral ligament tear.2. Moderate joint effusion is present.