Knee effusion MENISCI: No significant abnormality noted.ARTICULAR CARTILAGE AND BONE: There is diffuse thinning of the articular cartilage of the lateral compartment with areas of near full-thickness loss particularly of the femoral condyle anteriorly. The articular cartilage of the medial compartment is intact. There is heterogeneity of the articular cartilage of the patellofemoral compartment without evidence of full-thickness defect.LIGAMENTS: The ACL is intact. There is increased signal and thickening of the posterior collateral ligament suggesting myxomatous degeneration without full-thickness tear. The collateral ligaments are intact. EXTENSOR MECHANISM: Minimal amount of nonspecific edema overlies the prepatellar soft tissues. There is a small joint effusion.ADDITIONAL
1. Myxomatous degeneration of the PCL. The remaining cruciate and collateral ligaments are intact.2. Diffuse thinning of the articular cartilage of the lateral compartment with near full-thickness loss of the femoral condyle anteriorly.3. Small joint effusion.