Neutral position: retroversion of odontoid peg
This 37 year old patient has a history of neck pain, headaches and dizziness.
There is retroversion of the odontoid peg and in the neutral position the cervical spine angle measures 0°, with a large range of movement into flexion, and evidence of spinal instability as manifest by anterolisthesis at the C3-4 and C5-6 levels.
Weight-bearing and variable patient positioning enables a more precise diagnosis. The Medserena open Upright MRI system permits scanning the cervical spine in multiple variable positions including flexion, extension and rotation as required. Frequently, as in this case, pathology manifests itself to a greater or lesser extent depending on the positioning.