49-year-old male with pain and swelling. Evaluate for meniscus tear. MENISCI: There is globular increased signal abnormality within the posterior horn of the medial meniscus which may represent a combination of postsurgical change from prior partial meniscectomy and prior tearing. There is deformity of the posterior horn of the meniscus with associated linear signal abnormality that extends to the tibial articular surface and fills with intra-articular gadolinium consistent with a re-tear. The anterior horn appears intact.The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is a focal near full-thickness articular cartilage defect along the posterior aspect of the weightbearing surface of the medial femoral condyle, above the posterior horn of the meniscus. There is relative sparing of the lateral tibiofemoral compartment cartilage. There is full-thickness articular cartilage degeneration along the lateral facet of the patella with a large area completely devoid of cartilage. There is underlying degenerative subchondral signal abnormality.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact. There is an ossicle within the distal patellar tendon.ADDITIONAL
1. Findings consistent with a re-tear of the medial meniscus as described above.2. Full-thickness articular cartilage degeneration, most pronounced along the patellofemoral joint as described above.