Left: This T2-weighted image of the cervical spine shows significant anterior listhesis (displacement) at C4-C5 and minor retrolistheses at C5-C6 and C6-C7 in the midline sagittal plane, resulting in spinal canal stenosis without spinal cord compression at these levels. Right: Moderate neural foraminal narrowing is also present at C4-C5. The arrows indicate the anterior and posterior margins of the stenotic right neural foramen. The left neural foramen is not clearly visible on this view because of the patient’s positioning. Foraminal stenosis is secondary to osteophyte formation and anterolisthesis at this level.
Images courtesy of John Tsiouris, MD, Division of Neuroradiology, New York–Presbyterian Hospital/Weill Cornell Medical Center.