Current concepts in the anatomy and origin of pharyngeal diverticula.

The role of this paper is to present the current concepts in anatomy and etiopathogenesis of pharyngeal diverticula. Precise anatomical considerations highly emphasizing the weak anatomic areas which predispose the pouch formation are discussed. Focus exposed in details will also be given upon the structural and functional characteristics of the upper esophageal sphincter as well as to its physiological states, architecture and dynamic functions. A brief review of historical and current perspectives regarding the origin of pharyngeal diverticula has also been given. Special attention is given to the abnormal cricopharyngeal function in patients with pharyngeal pouches in the terms of altered UES compliance, importance of gastroesophageal reflux and histopathologic changes of cricopharyngeal muscle.