Reason: knee pain and locking, assess meniscus History: knee pain and locking MENISCI: The majority of the anterior horn of the lateral meniscus is replaced with intermediate signal intensity indicating extensive degeneration and degenerative tearing. The tearing extends into the body of the meniscus as well. There is mild blunting of the inner edge of the posterior horn of the lateral meniscus which may reflect chronic fraying. There is abnormal signal intensity within the posterior horn of the medial meniscus extending to the tibial articular surface indicating a horizontal tear.ARTICULAR CARTILAGE AND BONE: There is severe degeneration of the articular cartilage of the lateral compartment with full-thickness cartilage loss along the lateral femoral condyle and lateral tibial plateau. There is mild bone marrow signal abnormality in the lateral femoral condyle and lateral tibial plateau which is likely degenerative in etiology. There is near full-thickness to full-thickness cartilage loss along the posterior aspect of the medial femoral condyle. There is also focal degeneration of the articular cartilage of the femoral trochlea centrally. There are tricompartmental osteophytes.LIGAMENTS: The majority of the ACL is not well visualized, likely representing a tear. The PCL appears slightly thickened likely representing mild degeneration. The LCL and MCL appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Severe osteoarthritis of the knee including full-thickness articular cartilage degeneration most pronounced along the lateral tibiofemoral compartment.2. Degeneration and tearing of the medial and lateral meniscus.3. The ACL is not well visualized, likely representing a chronic tear.4. Moderate-sized joint effusion and Baker's cyst.5. Inflammation between the iliotibial band and lateral femoral condyle.