15-year-old female with a history of ACL repair 6 months ago presents with left knee pain. Evaluate ACL. Suboptimal examination secondary to patient motion artifact.MENISCI: There is blunting of the posterior horn of the lateral meniscus which may represent post operative changes of prior partial meniscectomy. No signal abnormality is identified within either meniscus. The medial meniscus appears intact.ARTICULAR CARTILAGE AND BONE: Note is made of osseous tunnels and metallic susceptibility artifact in the distal femur and proximal tibia consistent with the patient's history of prior ACL repair. There is severe articular cartilage degeneration along the lateral facet of the patella with irregularity and articular cartilage degeneration affecting the medial facet of the patella.LIGAMENTS: Postsurgical changes of prior ACL repair. The ACL graft appears intact. There is low signal intensity abnormality identified along the anterior aspect of the ACL graft which is suspicious for arthrofibrosis (cyclops lesion). The collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Findings consistent with anterior arthrofibrosis as described above, which may restrict terminal knee extension. The ACL graft appears intact. 2. Articular cartilage degeneration as described above.3. Blunting of the posterior horn of the lateral meniscus may represent postoperative changes from prior partial meniscectomy.