Reason: rule out MCL, ACL tears History: R knee pain and ligamentous laxity MENISCI: There is linear increased signal abnormality within the posterior horn and body of the medial meniscus which extends to the femoral and tibial articular surfaces indicating complex tearing with a large horizontal component (image 25; series 6). The anterior horn appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is focal full-thickness articular cartilage degeneration along the anterior aspect of the medial femoral condyle with underlying degenerative subchondral signal abnormality (image 17; series 5). The lateral tibiofemoral articular cartilage appears intact. There is a full-thickness articular cartilage fissure along the medial facet of the patella with underlying subchondral signal abnormality (image 10; series 4). There is increased bone marrow signal abnormality within the posterior aspect of the medial tibial plateau which may be degenerative in etiology or perhaps a direct bone contusion.LIGAMENTS: There is disruption of the proximal fibers of the superficial band of the MCL. The ACL and PCL appear intact. The LCL appears intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Disruption of the proximal fibers of the superficial band of the MCL.2. Complex tearing of the medial meniscus.3. Focal articular cartilage degeneration and fissuring as described above.4. Small joint effusion.