Cricopharyngeal diverticulum; Hypopharyngeal diverticulum; Pharyngoesophageal diverticulum; Pharyngoesophageal pouch; Posterior pulsion pharyngeal diverticulum; Retropharyngeal diverticulum
Pharyngoesophageal diverticulum refers to an acquired outpouching of the esophageal mucosa and submucosa, occurring in an area of relative muscular weakness. This area, known as Killian’s triangle, corresponds to the zone where the transverse fibers of the cricopharyngeus muscle intersect the oblique fibers of the inferior pharyngeal constrictor muscle. These diverticula are false diverticula as they are a herniation of mucosa and submucosa through the muscular wall. A possible causal mechanism would be an increased luminal pressure caused by impaired upper esophageal sphincter relaxation. Other findings such as achalasia, cricopharyngeal incoordination, or congenital weakness have been implicated, and gastroesophageal reflux could also play a role. Nevertheless the exact...
References and Further Reading
- Bowdler, D. A. (2008). Pharyngeal pouches. In M. J. Gleeson (Ed.), Scott Brown’s textbook of otorhinolaryngology (7th ed., pp. 1–22). Oxford.Google Scholar