22-year-old male with pain. Clinical ACL tear. MENISCI: There is linear branching signal abnormality within a diminutive posterior horn of the lateral meniscus which extends to the tibial and femoral articular surfaces consistent with a complex tear. The anterior horn appears intact. There is linear signal abnormality within the posterior horn of the medial meniscus which extends to the tibial articular surface near its root consistent with a complex tear with both horizontal and longitudinal components. The anterior horn appears intact.ARTICULAR CARTILAGE AND BONE: There is increased bone marrow signal abnormality within the medial femoral condyle, the posterior aspect of the medial tibial plateau, and the posterior aspect of the lateral tibial plateau consistent with bone contusions. There is focal full-thickness articular cartilage degeneration along the weightbearing surface of the medial femoral condyle above the posterior horn of the meniscus.LIGAMENTS: There is complete disruption of the proximal and mid substance fibers of the ACL, consistent with the clinical concern for ACL tear. There is increased signal abnormality within the lateral collateral ligament proper indicating a sprain. The medial collateral ligament appears intact. The PCL appears intactEXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Complete rupture of the ACL.2. Tears of the medial and lateral meniscus. 3. Bone contusions and focal full-thickness articular cartilage degeneration as described above. 4. Large joint effusion and findings suggestive of disruption of the joint capsule as described above. Other findings as described above.