Refers to when, shortly after a person swallows, some swallowed material returns from below the esophageal entrance back up into the hypopharynx. This finding is an almost certain diagnostic indicator of cricopharyngeal dysfunction, usually with an associated Zenker’s diverticulum.

If this reflux occurs during a videoendoscopic swallowing study, the clinician will see that, though there may be little to no hypopharyngeal residue immediately after the swallow, a moment later some swallowed material (e.g., blue-stained applesauce or water) reappears and wells up in the post-arytenoid area and into the pyriform sinuses. If this reflux occurs during a videofluoroscopic swallowing study, the clinician will see barium remaining in the Zenker’s sac and, immediately after each swallow, moving back upward into the hypopharynx.

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