15-year-old male with history of knee trauma and mechanical symptoms. Evaluate for cruciate/meniscal injury. MENISCI: There is a large complete longitudinal tear of the periphery of the body and posterior horn of the lateral meniscus, seen on multiple sequential sagittal and coronal images. The anterior horn appears intact. There is a complex tear of the posterior horn of the medial meniscus, consisting of a complete longitudinal tear through the periphery of the horn and a more oblique component, extending from the periphery to the femoral articular surface. The periphery of the body of the medial meniscus is indistinct and we cannot exclude meniscocapsular separation.ARTICULAR CARTILAGE AND BONE: There is a small bony fragment along the lateral aspect of the proximal tibial epiphysis representing a Segond-type fracture and/or an iliotibial band avulsion fracture. There is edema within the underlying marrow of the tibial plateau. There is also an impaction fracture along the lateral femoral condyle along the anterior horn of the meniscus which is associated with underlying bone marrow edema consistent with a "lateral notch sign". There is mild edema within the far medial aspect of the tibial plateau as well. There are no fluid-filled articular cartilage defects.LIGAMENTS: There is a full-thickness rupture of the ACL. The PCL appears intact. There is a partial thickness tear of the anterior fibers of the proximal half of the MCL. The femoral attachment of the medial patellofemoral ligament is not well visualized amidst this edema. The lateral collateral ligament proper and biceps femoris tendon appear intact. The anterior fibers of the iliotibial band can be traced to their insertion onto Gerdy's tubercle. The posterior fibers appear to attach to the aforementioned Segond type avulsion fracture.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Rupture of the ACL with a Segond type fracture and other associated findings as described above.2. Medial and lateral meniscus tears as described above with possible medial meniscocapsular separation.3. Joint effusion and other findings as described above.