54 year old male. Knee pain. Evaluate for meniscus. MENISCI: Globular signal abnormality in the body of the medial meniscus that extends into the posterior horn consistent with intrasubstance degeneration. The posterior horn of the medial meniscus near the intercondylar notch cannot be traced to its root and a complete radial tear is of concern (series 501, image 16; series 801, image 21). Lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: Diffuse moderate thinning of the medial tibiofemoral compartment articular cartilage and mild thinning of the lateral compartment cartilage with no focal abnormality. Scattered signal abnormality diffusely in the patellar articular cartilage without thinning or focal defect.LIGAMENTS: ACL, PCL, MCL, and lateral collateral ligament complex are intact.EXTENSOR MECHANISM: Extensor mechanism is intact.ADDITIONAL
1. Findings concerning for a complete radial tear of the posterior horn of the medial meniscus near its root. Intrasubstance degeneration of the body and posterior horn of the medial meniscus.2. Diffuse cartilage thinning of the tibiofemoral compartment, medial greater than lateral, with no focal abnormality.