Female 26 years old Reason: eval ligaments History: knee dislocation s/p reduction MENISCI: Complex tear of the posterior horn of the lateral meniscus with a torn fragment near the intercondylar notch. Also, there is undersurface tearing of the peripheral aspect of the posterior horn of the medial meniscus.ARTICULAR CARTILAGE AND BONE: Impaction fracture of the posterior aspect of the lateral tibial plateau involving the articular surface with mild displacement and posterior angulation. The fragment measures approximately 7 x 10 mm (series 601, image 11). Bone contusions are present along the anterior lateral femoral condyle and underlying the posterior lateral tibial condyle fracture. There is also a bone contusion of the posterior medial tibial condyle underlying the meniscal tear (series 701, image 22).LIGAMENTS: Complete disruption of the ACL, likely in the mid substance fibers. A portion of the torn ACL, which appears to be attached to the femur is situated posterior to the PCL. The PCL is indistinct at its attachment to the tibial plateau, likely indicating a high-grade partial tear (series 601, image 18). A full thickness tear at its tibial attachment is possible. There is complete disruption of the MCL. Edema surrounds the components of the LCL complex, however the LCL complex appears intact. There is also edema in the posterior lateral corner. The popliteus appears intact. However, the posterior capsule is disrupted at its tibial attachment (series 701, image 19).EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Complete disruption of the ACL and MCL with high-grade partial tearing at the insertion of the PCL. A full thickness tear at its tibial attachment is possible. 2.Impaction fracture in the posterior lateral tibial plateau and other osseous contusions as detailed above.3.Tear of the posterior horns of the medial and lateral menisci. The lateral meniscus posterior horn and body are torn with areas of maceration.4.Disruption of the posterior capsule of the joint.