51-year-old male with question of chondromalacia. MENISCI: The posterior horn of the medial meniscus is partially obscured from metallic artifact secondary to prior surgery. There appears to be blunting of the free edge of the posterior medial meniscus, but we cannot determine to what degree this represents tearing versus artifactual distortion. There is globular increased signal within the posterior horn and body of the medial meniscus suggesting intrasubstance degeneration. There is also mild intrasubstance degeneration of the lateral meniscus, but we see no discrete tear.ARTICULAR CARTILAGE AND BONE: There is mild superficial fraying of the articular cartilage of the patella. The articular cartilage of the femoral trochlea appears intact. Portions of the articular cartilage of the femoral condyles are obscured by metallic susceptibility artifact, but we see no fluid filled defects.LIGAMENTS: The patient has undergone ACL reconstruction. The graft appears intact. A band of low signal intensity posterior to the graft likely represents native ACL. The PCL, MCL, and LCL complex appears intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Evaluation of the menisci and articular cartilage is slightly limited by numerous foci of susceptibility artifact. There is blunting of the free edge of the posterior horn of the medial meniscus but we are uncertain the degree of which this represents tearing versus deformity from metallic susceptibility artifact.2. Mild degeneration of the articular cartilage of the patella.