Female 16 years old with knee pain and swelling, evaluate for ACL tear MENISCI: No significant abnormality noted.ARTICULAR CARTILAGE AND BONE: Increased T2 and decreased T1 signal along the posterior aspect of the lateral tibial plateau consistent with osseous contusion. No evidence of acute fracture.LIGAMENTS: Fiber discontinuity and increased signal on PD and T2 within the ACL compatible with a complete tear. The LCL complex, MCL, and PCL are intact.EXTENSOR MECHANISM: Increased signal on PD and T2 along the inferior patellar tendon at the insertion site of the tibial tuberosity compatible with a partial tear.ADDITIONAL
1. Complete ACL tear with a moderate joint effusion and osseous contusion of the posterolateral tibial plateau.2. Partial tear of inferior portion of the patellar tendon at the tibial tuberosity insertion site.