Knee pain Note that the evaluation is limited secondary to motion artifact.MENISCI: There is a complex tear of the posterior horn of the medial meniscus which consists of a horizontal component that extends to the tibial articular surface. There is also blunting of the free edge of the posterior horn of the meniscus near its root suggestive of a radial tear with a crescentic focus of low signal intensity near the root itself which may represent a displaced flap fragment. There is abnormal signal intensity within the body of the medial meniscus likely reflecting extension of the tear from the posterior horn. The anterior horn is intact.The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: Subjectively, the articular cartilage of the medial tibiofemoral compartment appears thinned. The articular cartilage of the lateral compartment appears relatively spared. There is superficial degeneration of the articular cartilage of the lateral patellar facet but the remaining patellofemoral compartment appears relatively spared as well.LIGAMENTS: The ACL appears thickened and poorly defined on the sagittal sequences. The proximal fibers of the ligament are better visualized on the T2-weighted coronal and axial sequences although distally the fibers are less well-defined. We suspect these findings reflect mucoid degeneration, particularly given the presence of a cyst within the adjacent intercondylar eminence; however we cannot exclude the possibility of a chronic tear. Of note, there are no bony contusions to indicate an acute rupture. The PCL, MCL, and LCL are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
Complex tear of the medial meniscus with other findings described above.