15-year-old female with knee pain during sports MENISCI: Increased signal intensity extending to the articular surface of the posterior horn and body of the medial meniscus indicates an undersurface longitudinal meniscal tear. No other meniscal tears are identified.ARTICULAR CARTILAGE AND BONE: Articular cartilage is intact. Increased T2 signal along the posterior tibial condyles extending into the metaphysis indicates a bone contusion.LIGAMENTS: There is disruption of the midportion of the ACL indicating a tear. The PCL is intact. The MCL and lateral collateral complex is intact.EXTENSOR MECHANISM: Extensor mechanism is intact. Mildly increased T2 signal within the medial retinaculum indicating sprain. Medial retinaculum appears intact. The lateral retinaculum is intact.ADDITIONAL
1.Complete ACL tear.2.Undersurface longitudinal tear of the posterior horn and body of the medial meniscus.3.Mild medial retinaculum sprain.4.Small joint effusion.