Reason: Is there a lateral meniscus or articular cartilage injury? History: lateral knee pain after injury yesterday; history of ACL reconstruction 2 years ago MENISCI: There is complex tearing through the anterior horn of the lateral meniscus. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is focal increased T2 hyperintense signal in the lateral femoral condyle and lateral tibial plateau, indicating contusion. There are multiple focal full-thickness tears of the articular cartilage of the lateral tibiofemoral compartment involving mainly the cartilage of the lateral femoral condyle. There is no acute fracture.LIGAMENTS: The MCL, LCL, and PCL are grossly intact. Postsurgical changes following prior ACL graft reconstruction are noted. The graft appears intact. There is scarring in the fat pad of Hoffa, likely postsurgical. EXTENSOR MECHANISM: The patellar and quadriceps tendons appear intact.ADDITIONAL
1. Complex tearing of the anterior horn of the lateral meniscus.2. Multiple full-thickness articular cartilage defects along the lateral femoral condyle.3. Contusions of the lateral femoral condyle and lateral tibial plateau.4. Other postsurgical changes following ACL reconstruction as described above.