56 show male with osteoarthritis of the knee MENISCI: There is increased signal within the anterior horn of the lateral meniscus near its root with fraying of the free edge, which may represent intrasubstance degeneration or degenerative tearing. There is a complex tear of the posterior horn extending into the body of the medial meniscus with mild medial extrusion of the body of the medial meniscus. A 4 mm parameniscal cyst is present adjacent to the medial meniscal posterior horn.ARTICULAR CARTILAGE AND BONE: There is edema along the far medial tibial plateau and anterior lateral femoral condyle which is likely reactive. There is mild thinning of the articular cartilage in the medial and lateral there is focal full-thickness cartilage loss along the lateral aspect of the trochlea with underlying reactive marrow signal changes. The patellar cartilage is intact without full-thickness cartilage loss. Small tricompartmental osteophytes are present.LIGAMENTS: The ACL and PCL are intact. There is mild fluid surrounding the MCL which may indicate a mild sprain. The lateral collateral ligament complex is intact.EXTENSOR MECHANISM: The quadriceps tendon as intact. There is mild thickening of the patellar tendon without clear internal signal.ADDITIONAL
1.Large complex medial meniscal tear.2.Increased signal within the lateral meniscus with fraying of the free edge may represent intrasubstance degeneration or degenerative tearing.3.Mild MCL sprain.4.Mild osteoarthritis.