★ Chronic ACL tears
- Laxity and abnormal horizontal orientation of fibers are the most useful features for detecting ACL disruption in the chronic setting as opposed to fiber discontinuity and bone contusions, which are the most useful features in the acute setting.
- Nonvisualization of the ACL has also been described as a finding of chronic ACL tears but is relatively uncommon.
- Absence of ACL tissue in the lateral intercondylar notch, indicating empty notch sian on coronal MR images (empty lateral wall)
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