24-year-old male. Left knee instability and pain. Evaluate ACL and meniscus tears. MENISCI: Longitudinal tear of the periphery of the posterior horn of the medial meniscus (series 9, image 10). An abnormally small and rounded morphology of the medial posterior horn of the lateral meniscus due to a tear of its free edge extending to the root (series 8, image 19).ARTICULAR CARTILAGE AND BONE: Bone contusions in the posterior medial femoral condyle and weight-bearing component of the lateral femoral condyle. Tibiofemoral and patellofemoral articular cartilage is normal in signal and morphology.LIGAMENTS: ACL is not visualized and is torn. The PCL is intact. MCL and lateral ligament complex are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Complete tear of the ACL.2. Longitudinal tear of the posterior horn of the medial meniscus. Tear of the free edge of the posterior horn of the lateral meniscus extending into the root.3. Bone contusions in the medial and lateral femoral condyles.