28-year-old male with history of psoriatic arthritis. MENISCI: The menisci are intact bilaterally.ARTICULAR CARTILAGE AND BONE: There is mild superficial fraying of the articular cartilage of the patella mainly along the medial aspect. The femoral trochlea appears shallow with prominence of the lateral facet suggesting femoral trochlear dysplasia. The articular cartilage of the femoral trochlea is intact. There is edema within the superolateral aspect of Hoffa's fat pad which can be seen in patellofemoral instability. The Insall-Salvati ratio is within normal limits. The tibial tuberosity to trochlear groove distance measures 18 mm, borderline. LIGAMENTS: No significant abnormality noted. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Superficial degeneration of the articular cartilage of the patella as above as well as anatomic findings which may predispose to patellofemoral instability.2. Small joint effusion.