History of ACL, twisting injury with swelling. Left knee pain. MENISCI: The medial and lateral menisci are intact. ARTICULAR CARTILAGE AND BONE: Post-surgical changes of an ACL graft. There is a focal defect of the midline patellar cartilage which goes down to the cortical bone. There is also fraying of the articular cartilage of the posterior medial femoral condyle. LIGAMENTS: There is a considerable amount of metal artifact from prior surgery that obscures the ACL graft which is probably intact as well as the PCL. The collateral ligaments are intact. EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Considerable post-surgical artifact from the ACL repair; this obscures the ACL graft which is probably intact.2. Focal defect of the midline patellar cartilage down to the cortical bone. 3. Fraying of the posterior medial femoral condyle articular cartilage. 