what causes pharyngeal diverticula
Posterior pharyngeal pulsion (Zenker's) diverticulum: Zenker called this pulsion diverticula. Earlier foreign body impaction was attributed as a cause of this diverticulum. Killian attributed spasmodic contraction of the circular fibers at the upper end of the esophagus.efinition: Pharyngeal pouches are mainly acquired and rarely congenital diverticula in and around the pharynx and oesophagus. These diverticula are nothing but circumscribed pouches caused by a protrusion of mucosa through a preexisting weakness / opening in the muscle layers of pharynx / oesophagus.