Reason: meniscal or ligamentous damage? History: limited ROM to flexion and extension, pain in fossae and lateral joint line Patient motion artifact results in suboptimal image quality on multiple sequences.MENISCI: There is branching linear increased signal abnormality within the posterior horn of the medial meniscus which extends to the periphery of the meniscus as well as to the tibial and femoral articular surface indicating a complex tear with a large longitudinal component. The anterior horn appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: Evaluation of the patellofemoral articulation is limited due to the aforementioned patient motion artifact. There is linear decreased signal abnormality within the articular cartilage along the lateral facet of the patella which may represent an articular cartilage fissure. Increased bone marrow signal abnormality within the posterior aspect of the lateral tibial plateau and medial femoral condyleLIGAMENTS: There is complete disruption of the ACL through its mid substance fibers. The PCL appears intact. The MCL and LCL appear intact given the aforementioned limitations due to patient motion artifact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
Patient motion artifact limits examination. 1. Complex tear of the posterior horn of the medial meniscus.2. Rupture of the ACL through its midsubstance fibers.3. Bone contusions of the lateral tibial plateau and medial femoral condyle.