History of knee hemarthrosis and instability after slipping injury. Postoperative changes of ACL repair are present.MENISCI: The menisci are intact.ARTICULAR CARTILAGE AND BONE: Mild edema within the lateral aspect of the posterior tibial plateau may represent a bone contusion. Mild deepening of the articular surface of the lateral femoral condyle above the anterior horn of the meniscus likely reflects an old impaction injury with mild heterogeneity of the overlying articular cartilage. The articular cartilage of the medial and lateral tibiofemoral compartments otherwise appears intact. There is a large full-thickness tear involving the articular cartilage along the medial facet of the patella which may be acute. There is superficial tearing of the articular cartilage along the patellar median eminence with relative preservation of the articular cartilage along the medial patellar facet.LIGAMENTS: The ACL graft appears thickened with increased signal intensity. There appears to be disruption of the mid fibers suggestive of complete tear. The PCL appears intact. The collateral ligaments are intact. EXTENSOR MECHANISM: Mild deformity of the patellar tendon and its bony attachments is compatible with ACL graft harvesting. The extensor mechanism otherwise appears intact.ADDITIONAL
1.Findings compatible with complete tear of patient's ACL graft.2.Large full-thickness tear of the articular cartilage of the medial facet of the patella.3.No evidence of meniscal tear. 4.Joint effusion and other findings as described above.