Diverticulum (redirected from rectal diverticulum)

diverticulum /di·ver·tic·u·lum/ (di?ver-tik´u-lum) pl. diverti´cula   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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allantoic diverticulum  the endodermal sacculation that becomes the allantois; in humans it is an outpouching of the caudal wall of the yolk sac that becomes the urachus.

ileal diverticulum , Meckel's diverticulum an occasional sacculation or appendage of the ileum, derived from an unobliterated yolk stalk.

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di·ver·tic·u·lum (dvûr-tky-lm) n. pl. di·ver·tic·u·la (-l) A pouch or sac branching out from a hollow organ or structure. diver·ticu·lar adj.

diverticulum an intestinal diverticulum: A. diverticulum, B. large intestine, C. blood vessel

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Diverticulum

Small tubes or pouches that project off the wall of the intestine, visible as opaque on an x ray after the patient has swallowed a contrast (dye) substance.

Mentioned in: Bowel Resection, Colostomy, Congenital Bladder Anomalies, Peritonitis

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diverticulum,

n sac-like herniation occurring in a muscular organ wall, such as the small intestine, stomach, or colon.

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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.