Male 15 years old Reason: Knee pain and swollen History: knee pain and swelling MENISCI: Medial and lateral menisci are intact.ARTICULAR CARTILAGE AND BONE: Articular cartilage is intact. T2 hyperintense bone contusion involving the lateral aspect of the distal femur and the medial aspect of the patella. The patella is displaced laterally.LIGAMENTS: Cruciate and collateral ligaments are intact. T2 hyperintense signal and partial tearing of the MPFL.EXTENSOR MECHANISM: Extensor mechanism is intact.ADDITIONAL
1. Lateral distal femoral and medial patellar bone contusion with partial tearing of the MPFL, consistent with transient patellar dislocation.2. Large joint effusion.