Reason: Evaluate left knee for lateral meniscus tear (compare with 2007) History: lateral joint line pain MENISCI: There is increased signal abnormality and deformity of the posterior horn of the lateral meniscus which extends to the tibial articular surface indicating intrasubstance degeneration as well as a complex tear with a predominantly horizontal component. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is full-thickness articular cartilage degeneration along the weightbearing surface of the lateral femoral condyle above the posterior horn of the meniscus with areas devoid of articular cartilage. There is near full-thickness articular cartilage degeneration along the lateral aspect of the tibial plateau underlying the posterior horn of the lateral meniscus. There is partial-thickness articular cartilage degeneration along the weightbearing surface of the medial femoral condyle above the posterior horn and body of the meniscus. There is a near full-thickness to full-thickness articular cartilage defect along the lateral facet of the patella with associated delamination. There is full-thickness articular cartilage degeneration along the medial facet of the patella, centrally. There are tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments appear intact. There are multiple foci of fluid signal intensity along the posterior aspect of the PCL which may reflect mucoid degeneration. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Degeneration and complex degenerative tearing of the posterior horn of the lateral meniscus which is progressed when compared to the prior examination. 2. Osteoarthritis of the knee including articular cartilage degeneration, full-thickness defects, and delamination, most pronounced along the lateral tibiofemoral and patellofemoral articulations. 3. Moderate size joint effusion.