60-year-old female with severe pain locking and swelling MENISCI: There is ill-defined increased signal intensity within the medial meniscus indicating intrasubstance degeneration. The meniscus also appears attenuated likely representing chronic attritional tearing. Furthermore, the root attachment of the anterior horn is indistinct which may represent a root avulsion. There is medial extrusion of the body of the medial meniscus. There is increased signal intensity within the posterior horn of the lateral meniscus suggesting intrasubstance degeneration although no discrete tear is seen.ARTICULAR CARTILAGE AND BONE: Severe osteoarthritis affects the medial compartment. The weightbearing surfaces of the medial femoral condyle and medial tibial plateau are largely devoid of articular cartilage with degenerative signal abnormality within the underlying subchondral bone. Moderate osteoarthritic changes affect the patellofemoral and lateral compartments. There are tricompartmental osteophytes. LIGAMENTS: The proximal fibers of the ACL are indistinct on the sagittal images but the ligament appears intact on the coronal images. The PCL is intact. The superficial band of the MCL is intact. The lateral collateral ligament complex is intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Severe osteoarthritis and multiple intra-articular loose bodies.2.Degeneration of the meniscus with possible avulsion of the root of the anterior horn of the medial meniscus.