Status post patellar dislocation. MENISCI: No significant abnormality noted.ARTICULAR CARTILAGE AND BONE: There is mild increased signal within the articular cartilage of the patella, without focal fluid-filled defect seen. The articular cartilage otherwise appears normal. The bone marrow appears normal.There is slight lateral translation and tilt of the patella relative to the femoral trochlea. The superior aspect of the femoral trochlea is flat, suggesting mild dysplasia. The TT-TG distance measures just over 1 cm, which is normal. The Insall-Salvati ratio is 1.25, at the upper limits of normal. LIGAMENTS: Minimal increased signal is seen within the MCL likely reflecting prior injury. However the MCL is intact with no edema otherwise seen. The LCL and cruciate ligaments are intact.The posterior fibers of the medial patellofemoral ligament are indistinct near the femoral attachment, and we cannot exclude the possibility of a chronic tear.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Findings suggestive of mild femoral trochlear dysplasia with mild lateral tilt and translation of the patella relative to the trochlea and a possible chronic tear of the proximal fibers of the medial patellofemoral ligament posterior.2. Mild superficial degeneration of the patellar articular cartilage.3. No loose bodies seen.