77-year-old male Reason: ligamentous tear? History: right knee pain and inflammation MENISCI: There is mild globular signal intensity within the posterior horn of the lateral meniscus indicating intrasubstance degeneration. The lateral meniscus appears intact. There is intrasubstance degeneration of the posterior horn of the medial meniscus. There is blunting of the posterior horn of the medial meniscus consistent with superficial fraying/degenerative tearing. No fluid-filled tear is evident. The anterior horn medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is subjective thinning of the lateral compartment cartilage. The medial tibiofemoral compartment appears relatively spared. There is full-thickness articular cartilage degeneration along the lateral facet of the patella and femoral trochlea with large areas completely devoid of articular cartilage with associated underlying degenerative signal abnormality. There is also full-thickness articular cartilage defect identified along the medial facet of the patella, centrally. There are tricompartmental osteophytes.LIGAMENTS: There is increased signal abnormality within the proximal fibers of the superficial band of the MCL indicating a sprain/partial thickness tearing. There is edema within the underlying medial femoral condyle with an apparent small avulsion fracture (16; series 901). This could be further evaluated with dedicated radiographs if clinically warrented. The ACL appears intact. The PCL appears intact. The LCL appears intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Partial thickness tearing/sprain of the MCL with possible minimally displaced subacute avulsion fracture from the medial femoral condyle.2. Intrasubstance degeneration and superficial fraying/degenerative tearing of the medial meniscus. 3. Osteoarthritis of the right knee with full-thickness articular cartilage degeneration as described above. 4. Small joint effusion.