Reason: rule out meniscal injury History: pain MENISCI: The medial and lateral meniscus appear intact.ARTICULAR CARTILAGE AND BONE: The femoral trochlea is shallow superiorly suggesting femoral trochlear dysplasia. There is a full-thickness articular cartilage defect along the lateral facet of the patella centrally with delamination. There is associated subchondral signal abnormality in the underlying areaLIGAMENTS: The cruciate and collateral ligaments appear intact. There is a subcentimeter focus of fluid signal intensity along the posterior aspect of the distal fibers of the PCL which may represent mucoid degeneration versus ganglion formation.EXTENSOR MECHANISM: The extensor mechanism appears intact. The Insall Salvati ratio is between 1.3 and 1.4 indicating patella alta.ADDITIONAL
1. Focal full thickness articular cartilage defect along the lateral facet of the patella with delamination.2. Borderline tibial tubercle to trochlear groove distance, patella alta, femoral trochlear dysplasia, and edema within the superolateral aspect of Hoffa's fat pad. These findings can be seen in patellofemoral instability.