16 year-old female with knee pain, evaluate for tear of the medial patellofemoral retinaculum MENISCI: The medial and lateral menisci are intact.ARTICULAR CARTILAGE AND BONE: There is signal abnormality and surface fraying of the articular cartilage along the lateral patella facet. The patellofemoral and tibiofemoral articular cartilage are otherwise normal. No osteochondral defect.LIGAMENTS: The cruciate and collateral ligaments are intact.EXTENSOR MECHANISM: There is slight increased T2 signal abnormality within the lateral patellofemoral retinaculum at its attachment on the patella. No full thickness disruption of the patellofemoral retinaculum. Patellar alignment is within normal limits. The patella and quadriceps tendons are intact. ADDITIONAL
1. Signal abnormality within the lateral patellofemoral retinaculum at its attachment on the patella suggesting injury without full thickness disruption. Patella alignment is normal.2. Chondromalacia of the lateral patella facet without full thickness defect or OCD.3. Mild edema within the lateral aspect of the infra-patella fat pad may represent fat pad impingement.4. Intact menisci, cruciate and collateral ligaments. 