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Smooth, prominent impression of the cricopharyngeus muscle at the level of C5/6 results in a stenosis and jet of contrast. Anterior mucosal irregularity relates of a submucosal venous plexus often present at this level.
- cricopharyngeal bars are relatively common on barium swallows
- mostly asymptomatic with dysphagia resulting from a different pathology (as in this case from thoracic oesophageal dysmotlity)
- associated with gastro-oesophageal reflux disease and Zenker's diverticulum