Female 16 years old Reason: right knee pain now with swelling and pain. Mild effusion. Pain with full extension MENISCI: Medial and lateral menisci are normal.ARTICULAR CARTILAGE AND BONE: T2 hyperintense bone contusion in the inferior aspect of the patella, with focal thinning of the patellar articular cartilage.LIGAMENTS: Cruciate and collateral ligaments are intact. EXTENSOR MECHANISM: Extensor mechanism is intact.ADDITIONAL
1.Parameniscal cysts anterior to the lateral meniscus. Even though no discrete tear is evident, meniscal tear is the most likely etiology of parameniscal cyst.2.Patellar contusion suggesting transient dislocation of the patella.