68 year old female with right knee pain and effusion. MENISCI: There is globular and linear intrasubstance signal throughout the lateral meniscus indicating degeneration with formation of a intrameniscal/parameniscal cysts within/along the meniscus. Within the anterior horn the signal abnormality appears to extend to the femoral articular surface and within the posterior horn to the tibial articular surface in a horizontal fashion compatible with degenerative tearing. There is mild intrasubstance degeneration of the medial meniscus but no discrete tear is evident.ARTICULAR CARTILAGE AND BONE: There is moderate degeneration of the articular cartilage of the undersurface of the patella with degenerative signal abnormality within the underlying subchondral bone. There is delamination of the articular cartilage along the weightbearing portion of the medial femoral condyle resulting in a full thickness defect measuring approximately 1.5 cm in AP dimension and 1.0 cm in the transverse dimension. There is mild thinning of the articular cartilage of the anterior aspect of the medial tibial plateau. There is focal near-full-thickness to full-thickness degeneration of the articular cartilage of the lateral tibial plateau between the meniscal horns. There is also degeneration of the articular cartilage of the lateral femoral condyle posteriorly.LIGAMENTS: The cruciate and collateral ligaments appear intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Intrasubstance degeneration and degenerative tearing of the lateral meniscus with formation of small intrameniscal/parameniscal cysts.2. Articular cartilage degeneration most notably affecting the patellofemoral and medial tibiofemoral compartments.