14-year-old male patient with right knee pain and swelling. Question of right knee injury. MENISCI: The medial and lateral menisci are intact.ARTICULAR CARTILAGE AND BONE: The articular cartilage of all three compartments is intact.There is a region of decreased T1 and high T2 signal within the medial aspect of the medial femoral condyle without a discrete fluid-filled fracture line. This likely represents a bone contusion.LIGAMENTS: The cruciate and collateral ligaments are intact. The popliteus muscle and tendon are intact. EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
Medial femoral condyle bone contusion with large joint effusion.