16-year-old male patient with OCD lesion on radiograph and knee pain. MENISCI: There is tearing of the free edge of the body and posterior horn of the lateral meniscus.ARTICULAR CARTILAGE AND BONE: There is a full-thickness chondral defect and cortical defect in the lateral tibial plateau that measures 5 mm in AP dimension with underlying reactive marrow changes and subchondral cyst formation.LIGAMENTS: The anterior cruciate ligament, posterior cruciate ligament, medial collateral ligament, lateral collateral ligament complex and patellar retinacula are intact. EXTENSOR MECHANISM: There is mild lateral subluxation of the patella relative to the femur. Patella alta with Insall-Salvati ratio of 1.5. There is signal abnormality in the central patellar tendon fibers (5 mm in mediolateral dimension), compatible with a partial tear.ADDITIONAL
1.Probable combination of osteochondral defect and subchondral cyst formation in the lateral tibial plateau.2.Partial patellar tendon tear with patella alta.3.Tearing of the free edge of the body and posterior horn of the lateral meniscus.4.Mild lateral subluxation of the patella.