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Intrathecal contrast is most marked within the thoracic spine. Deformity and ventral displacement of the spinal cord which is most marked at the level of T6. Prominence of the CSF space posteriorly at this level which measures 8 mm in AP diameter. Small volume CSF is evident anterior to the spinal cord at this level.
Multilevel degenerative change of the spine with prominent bridging anterior osteophytes in the thoracic spine as well as facet joint arthropathy with partial ankylosis of the upper thoracic facet joints.
Conclusion:
Deformity and ventral displacement of the spinal cord at the level of T6. The presence of CSF anterior to the cord at this level excludes spinal cord ventral herniation and favours a thoracic arachnoid web.