Abstract
Pharyngoesophageal (Zenker’s) diverticulum is a false diverticulum of the cervical esophagus. This pulsion diverticulum is composed of mucosa, covered by thin areolar tissue, herniating at Killian’s triangle between the obliquely positioned inferior constrictor muscle and the transversely oriented cricopharyngeus muscle. Pharyngoesophageal diverticulum was first described by Abraham Ludlow in 1764 as a “bag formed in pharynx.” Friedrich Albert Zenker in 1867 described the clinicopathological characteristics of 23 previous cases and 5 of his own cases in Kraukenheiten Des Oesophagus. The pathophysiology of Zenker’s diverticulum has been attributed to functional abnormalities of the upper esophageal sphincter zone created by the cricopharyngeus muscle.
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