24-year-old female. Left knee pain and instability. Left patellar dislocation. MENISCI: Medial and lateral menisci are normal in signal intensity and morphology without evidence of a tear.ARTICULAR CARTILAGE AND BONE: Small bone contusion at the anterior aspect of the lateral femoral condyle. The remainder of the bone marrow signal intensity is within normal limits. No patellar contusion is evident. Tibiofemoral and patellofemoral compartment articular cartilage is intact.LIGAMENTS: ACL, PCL, MCL, and lateral collateral ligament complex are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Small bone contusion in the lateral femoral condyle, which may be sequelae of prior patellar dislocation. 2. Femoral trochlear dysplasia.