Lateral knee pain MENISCI: There is mildly increased signal within the anterior horn of the lateral meniscus with questionable extension to the inferior articular surface. The medial meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is a small focal full-thickness defect of the articular cartilage of the lateral femoral condyle best appreciated on series 8 image 15/30 and series 5 image 23/31. There is a small amount of underlying reactive marrow edema. The remaining articular cartilage of the knee is otherwise preserved. A small amount of marrow is also noted within the medial tibial plateau posteriorly.LIGAMENTS: The ACL is absent. The PCL is intact as are the remaining collateral ligaments.EXTENSOR MECHANISM: No significant abnormality noted.ADDITIONAL
1. Ruptured ACL. 2. Small focal full-thickness cartilage defect of the lateral femoral condyle. The remaining articular cartilage is preserved.3. Increased signal within the anterior horn of the lateral meniscus with possible extension to the inferior articular surface which may reflect a small tear.