21-year-old female with pain status post new injury, history of ACL graft MENISCI: There is branching signal abnormality within the posterior horn of the medial meniscus extending to the body indicating a complex tear, consisting predominantly of a long complete longitudinal tear seen on multiple sequential images. The anterior horn of the medial meniscus is intact. There are also thin linear foci of intermediate signal intensity within the posterior horn of the lateral meniscus at its root suggesting additional longitudinal tears which were not clearly evident on the prior exam. The anterior horn and body of the lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is mild edema within the posterior aspect of the lateral tibial plateau as well as the anterior lateral femoral condyle indicating bone contusions. No fluid-filled defects are present in the articular cartilage.LIGAMENTS: Since the prior exam, there has been interval ACL reconstruction. However, the intra-articular graft is indistinct, indicating disruption. There is buckling of the PCL which otherwise appears intact. The MCL is intact. There is mild edema along the distal IT band and lateral collateral ligament, however the lateral collateral ligament complex is intact. A small amount of edema extends inferiorly along the fascia superior to the anterior compartment musculature.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Postoperative changes of ACL reconstruction with rupture of the ACL graft.2.Complex, predominantly longitudinal tear of the posterior horn of the medial meniscal body.3.Possible smaller longitudinal tears of the lateral meniscus posterior horn near its root.