Reason: Eval for MPFL tear History: Patellar instability MENISCI: The medial meniscus appears intact. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is bone marrow edema along the anterolateral aspect of the lateral femoral condyle likely from recent patellar dislocation. The superior aspect of the femoral trochlea appears shallow indicating femoral trochlear dysplasia, but the articular cartilage of the patellofemoral articulation appears intact. The articular cartilage of the medial and lateral compartments appears intact.LIGAMENTS: The cruciate and collateral ligaments appear intact. There is mild increased signal intensity within the posterior fibers of the superficial band of the MCL which may represent a mild sprain, but we see no tear.EXTENSOR MECHANISM: The patellar tendon appears intact. The quadriceps tendon appears intact. There is thickening and abnormal signal intensity of the medial retinaculum indicating tearing. The MPFL is not well visualized as a discrete structure in this patient and is likely torn. Of note, the retinacular structures appear abnormal and likely torn at both the patellar and femoral attachments. There is also edema superficial to the vastus medialis muscle.ADDITIONAL
Findings indicating prior transient lateral dislocation of the patella including bone marrow edema along the anterolateral aspect of the lateral femoral condyle as well as tearing of the medial retinaculum and MPFL as described above.