Female 51 years old; Reason: Right knee pain after fall. Assess for intra-articular pathology. History: Pain, swelling and difficulty bearing weight Please note that metallic artifact from the prior ACL repair limits evaluation of the proximal tibia. MENISCI: No significant abnormality noted. The menisci are intact.ARTICULAR CARTILAGE AND BONE: There is marked loss of cartilage along the patellar undersurface, with fissuring at the apex. A subcentimeter focal partial-thickness defect is present in the articular cartilage of the medial femoral condyle. Mild degenerative-type signal is present in the lateral tibiofemoral compartment cartilage, without fluid-filled cartilage defect.Mild depression of the posterior aspect of the lateral tibial plateau with mild underlying bone marrow edema is compatible with a compression deformity. LIGAMENTS: Post-surgical changes of an ACL graft are noted; however, the mid-portion of the reconstructed ACL is not seen, likely representing a tear. The PCL is intact. The collateral ligaments are intact.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Findings compatible with an ACL graft tear.2. Mild to moderate cartilage degeneration, most prominent at the undersurface of the patella, as above.3. Mild compression deformity of the lateral tibial plateau.