traction diverticulum

traction diverticulum

n.

A diverticulum formed by the pulling force of contracting bands of adhesion and occurring mainly in the esophagus.

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diverticulum

pl. diverticula [L.] a circumscribed pouch or sac occurring normally or created by herniation of the lining mucous membrane through a defect in the muscular coat of a tubular organ.

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auditory tube diverticulum

see guttural pouch.

dorsal urethra diverticulum

a small pouch dorsal to the urethra in the male ruminant.

esophageal diverticulum

a congenital or acquired localized dilatation or outpouching of the esophageal wall in which food and liquids may accumulate. Pulsion (or pressure) diverticula result from increased intraluminal pressure and protrusion of mucosa through the muscular wall. Traction diverticula are created by periesophageal inflammation, fibrosis and adhesions to surrounding structures. Vascular ring anomalies are a common cause of anterior thoracic esophageal diverticula in dogs. Epiphrenic are those located between the heart base and diaphragm.

Clinical signs include dysphagia and regurgitation, and esophageal obstruction by impacted food may occur.

intestinal diverticulum

a pouch or sac formed by hernial protrusion of the mucous membrane through a defect in the muscular coat of the intestine.

nasal diverticulum

the part of the horse's nostril dorsal to the alar fold leads into this blind pouch, which is lined with skin. Called also false nostril.

pressure diverticulum

see esophageal diverticulum (above).

pulsion diverticulum

see esophageal diverticulum (above).

rectal diverticulum

weakness and rupture of the muscular layer of the rectal wall allows formation of a pocket. Most commonly seen in dogs in association with perineal hernia. There is straining and an obvious bulge beside the anus.

stomach diverticulum

a small pouch at the left end of the pig's stomach, close to the esophageal entry into the stomach.

suburethral diverticulum

lies below the opening of the urethra of the cow.

traction diverticulum

see esophageal diverticulum (above).

diverticulum tubae auditivae

see guttural pouch.