Changes

A circumscribed sacculation of the oesophageal wall. These can be divided into congenital or acquired. Congenital diverticula are due to a herniation of the mucosa through a muscularis defect. Acquired diverticula can be subdivided into:

A circumscribed sacculation of the oesophageal wall. These can be divided into congenital or acquired. Congenital diverticula are due to a herniation of the mucosa through a muscularis defect. Acquired diverticula can be subdivided into:

#'''Traction forms''' consists of all the oesophageal layers and results from peri-oesophageal inflammation and fibrosis and develop mainly in the cranial and mid-oesophageal body. Sacculations are created by adhesions to adjacent tissues.

#'''Traction forms''' consists of all the oesophageal layers and results from peri-oesophageal inflammation and fibrosis and develop mainly in the cranial and mid-oesophageal body. Sacculations are created by adhesions to adjacent tissues.

#'''Pulsion forms''' includes the epitheliuma nd connective tissue and results from:

#'''Pulsion forms''' includes the epithelium and connective tissue and results from:

*an increase in intraluminal oesophageal pressure

*an increase in intraluminal oesophageal pressure

*abnormal local oesophageal motiltiy

*abnormal local oesophageal motiltiy