Female 24 years old Reason: knee patellar instability, evaluate TT-TG distance, evaluate MPFL. Pt also with h/o R knee surgery for patellar dislocations. Multiple left patellar dislocations as well MENISCI: Menisci are intact.ARTICULAR CARTILAGE AND BONE: No bone marrow signal abnormality. There is articular cartilage fraying at the median eminence of the patella. No focal articular cartilage defect. The remainder of the articular cartilage is within normal limits.LIGAMENTS: The ACL, PCL, MCL, and lateral collateral complex is intact. EXTENSOR MECHANISM: The quadriceps and patellar tendons are thickened suggesting chronic tendinosis. There is linear increased signal intensity within the extensor mechanism anterior to the patella which may reflect interstitial tearing, similar to the prior exam. Ossicle is present in the proximal patellar tendon.ADDITIONAL
1.Within the left knee there is patella alta, borderline tibial tubercle-trochlear groove distance, and other findings as detailed above which are compatible with suspected history of patellofemoral instability.2.Within the right knee there is mild patella alta, edema in the superior lateral corner of Hoffa's fat pad, as well as fraying of the patellar cartilage, consistent with history of patellofemoral instability. Tibial tubercle trochlear groove distance is within normal limits.