17-year-old male with right knee pain after injury, concern for ACL tear MENISCI: The medial and lateral menisci are intact.ARTICULAR CARTILAGE AND BONE: There is a subchondral defect in the anterior aspect of the lateral femoral condyle with associated surrounding bone marrow edema, compatible with an impaction fracture. A defect in the articular cartilage is also noted in this area. There is also bone marrow edema in the medial patellar facet. The bone marrow signal elsewhere is normal.LIGAMENTS: The anterior and posterior cruciate ligament are intact. The medial collateral ligament and lateral collateral ligament complex is intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1.There is evidence of lateral patellar dislocation with impaction fracture in the bilateral femoral condyle as well as disruption of the medial retinaculum.2.There is associated bone marrow and soft tissue edema, a large joint effusion, and likely strain of the medial gastrocnemius and vastus medialis tendons.