Male 16 years old with left knee pain and swelling. Evaluate meniscus tear and chronic PCL tear. MENISCI: There is deformity of the posterior horn of the medial meniscus near its root representing a root avulsion as seen on the prior study. Intermediate signal intensity at the expected site of attachment presumably represents scarring. There is mild medial extrusion of the medial meniscus. The body and anterior horn of the medial meniscus are unremarkable. There is a prominent transverse meniscal ligament but we see no definite lateral meniscus tear.ARTICULAR CARTILAGE AND BONE: There is partial thickness degeneration of the articular cartilage of the medial femoral condyle which has progressed compared to the prior study.LIGAMENTS: The anterior cruciate ligament is intact. There is deformity of the posterior cruciate ligament proximally with low signal intensity strands connecting the distal ligamentous fibers to the femur likely reflecting scarring from prior PCL rupture. The medial collateral ligament and lateral collateral ligament complex are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Chronic tear of the root of the posterior horn of the medial meniscus.2.Chronic tear of the posterior cruciate ligament with low signal intensity fibers extending from the ligament to the femur likely representing scarring.3.Partial-thickness degeneration of the articular cartilage of the medial femoral condyle which has progressed compared to the prior study.4.Joint effusion and Baker's cyst.5.Popliteal artery bypass incompletely imaged on this study.