Male 60 years old Reason: r/o internal derangement History: pain and swelling in the knees, worse on the left. Hx of left Baker's cyst on the left MENISCI: There is extensive intermediate to high signal within the posterior horn of the medial meniscus, which extends to the articular surface consistent with complex/degenerative tearing. The lateral meniscus appears intact, although there are several parameniscal cysts at the origin of the anterior horn of the lateral meniscus, as well as mild fraying along its medial surface.ARTICULAR CARTILAGE AND BONE: There is focal full-thickness cartilage loss along the weightbearing surface of the medial femoral condyle, with adjacent irregular cartilage thinning anterior and posterior to this focal full-thickness defect. There is mild irregularity of the patellar articular cartilage.LIGAMENTS: The anterior cruciate and posterior cruciate ligaments are intact. The medial and lateral collateral ligament complexes are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Extensive complex/degenerative tearing of the posterior horn of the medial meniscus.2.Focal full-thickness cartilage loss as well as adjacent cartilage thinning of the weightbearing surface of the medial femoral condyle.3.Small joint effusion and large Baker's cyst.