Reason: eval for meniscal tear History: recent fall, L knee effusion and inability to fully extend, medial sided pain MENISCI: The lateral meniscus appears intact. There is a complex tear with a large radial component involving the posterior horn of the medial meniscus, near its root. There is intrasubstance degeneration of the posterior horn of the medial meniscus with blunting likely representing additional degenerative tearing. There is slight medial extrusion of the body of the medial meniscus. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: The lateral tibiofemoral articular cartilage appears relatively spared. There is full-thickness articular cartilage degeneration along the weightbearing surface of the medial femoral condyle above the posterior horn of the meniscus with large areas completely devoid of articular cartilage. There is full-thickness articular cartilage degeneration affecting the patellofemoral articulation with areas along the lateral facet of the patella completely devoid of articular cartilage. There is underlying subchondral signal abnormality. There is a full-thickness articular cartilage cleft along the far medial aspect of the medial facet of the patella. There are tricompartmental osteophytes.LIGAMENTS: There is thickening and intermediate signal intensity within the ACL indicating at least partial thickness tearing/sprain. There is disruption of the anterior fibers of the superficial and deep components of the MCL.EXTENSOR MECHANISM: The extensor mechanism appears intact. There is a small amount of edema within the superolateral aspect of Hoffa's fat pad which is nonspecific. There is patella alta.ADDITIONAL
1. Complex tear of the posterior horn of the medial meniscus with a large radial component and medial extrusion of the body of the medial meniscus.2. Partial-thickness tearing of the ACL.3. Disruption of the anterior fibers of the superficial and deep components of the MCL.4. Osteoarthritis of the left knee including full-thickness articular cartilage degeneration most pronounced along the medial tibiofemoral and patellofemoral articulations. Other findings as described above.