Zenker's diverticula are esophageal outpouchings in the region of the
cricopharyngeus which typically grow in a posterolateral and inferior
direction and can cause esophageal compression if the diverticulum is
large enough. We describe a patient in whom a Zenker's diverticulum ex
panded posteriorly and superiorly so that it was positioned in the pos
terior pharyngeal space, causing both esophageal and tracheal narrowin
g.