28-year-old female with a history of ACL reconstruction. Evaluate lateral meniscus. Presents with right knee pain. MENISCI: There is increased signal abnormality within the posterior horn of the lateral meniscus which may represent prior tearing or postsurgical change from prior partial meniscectomy, appearing similar to the prior study. There are no fluid filled defects to confirm a retear. The lateral meniscus appears intact.ARTICULAR CARTILAGE AND BONE: There is partial-thickness articular cartilage degeneration along the weightbearing surface of the lateral femoral condyle above the posterior horn of the meniscus. There is superficial fraying of the articular cartilage of the weightbearing surface of the medial femoral condyle. The patellofemoral articular cartilage appears intact. There are tricompartmental osteophytes.LIGAMENTS: Note is made of postsurgical changes of prior ACL graft reconstruction. The ACL graft appears intact. There is low signal intensity along the anterior aspect of the mid substance fibers of the ACL graft which may represent anterior arthrofibrosis versus synovitis. Lobulated fluid signal intensity along the posterior aspect of the proximal fibers of the graft which may represent mucoid degeneration versus ganglion formation. The PCL appears intact. The LCL and MCL appear intact.EXTENSOR MECHANISM: The extensor mechanism appears intact.ADDITIONAL
1. Postoperative changes of ACL graft reconstruction. The ACL graft appears intact. Low signal intensity abnormality along the anterior aspect of the graft may represent anterior arthrofibrosis versus a synovitis. Lobulated fluid signal intensity along the posterior aspect of the graft may represent mucoid degeneration versus ganglion formation. 2. Mild osteoarthritic changes of the knee. 3. Nonspecific subcutaneous edema along the anterior aspect of the knee. 