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An abnormal outpocketing or sac on the wall of a hollow organ.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a pouch formed by the congenital or acquired protrusion of the wall of a tubular organ in man. Most frequently encountered are diverticula of the esophagus or urinary bladder and more rarely, of the duodenum or stomach. Congenital diverticula are associated with defects in the development of the organ. Acquired diverticula arise as a result of pressure from the organ cavity on its wall, which has been weakened either by a pathological process (trauma, inflammation), or they may result from congenital muscular weakness of the wall (pouch-like protrusion). Diverticula may develop when diseases of neighboring organs result in a pulling on the organ wall by cicatrices and adhesions (funnel-shaped protrusion). After it has entered a diverticulum, the content of an organ is retained there for some time; later the diverticulum is evacuated. The diverticulum gradually stretches and becomes enlarged, and evacuation becomes difficult. The stagnant content irritates the mucous membrane of the diverticulum and becomes infected. Inflammation of the walls of the diverticulum develops—diverticulitis (catarrhal, ulcerative, or phlegmonous; perforation of the diverticulum is possible). A diverticulum of the esophagus may manifest itself by difficulty of food passage and vomiting and a diverticulum of the urinary bladder, by difficulty in urinating. An intestinal diverticulum sometimes causes obstruction. Treatment depends on the site and the course of the illness; in some cases surgery is necessary.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Unfortunately, swallowing deteriorated again at 3 months, and a repeat barium swallow was performed (Figure 3), showing that the diverticuli were well-treated but suggesting that cricopharyngeal spasm may be causing ongoing dysphagia.
After untwisting the volvulus segment, resection of about 1.5 feet of the affected part of the jejunum with diverticuli (figure 3) with end-to-end jejuno-jejunal anastomosis was done.
A close correlation between periampullary diverticuli and the formation of biliary tract stones has been reported.
Colonic diverticuli are thought to develop from an increase in intraluminal pressure.
There was mural thickening of the small bowel along with multiple diverticuli present on the jejunum.
It is commonly a disease of the elderly and over 40% of patients in their 70s are thought to have diverticuli; although its exact pathogenesis remains unclear, complex interactions between colonic microbiota, colonic motility, inflammation on a microscopic level, and genetic factors are believed to play a part [2, 3].
The contrast-enhanced images can show problems such as abnormal growths, ulcers, polyps, diverticuli or colon cancer.
The excellent soft-tissue contrast and multiplanar capability of MRI provide superb depiction of pelvic anatomy, allowing differentiation between entities that can mimic the mullerian duct cyst, such as posterior diverticuli of the bladder and urethra, utricle cyst, vas deferens cyst, and seminal vesicle cyst.
A computed tomography (CT) scan of his abdomen revealed a 3-mm calculus in the mid-left ureter without hydronephrosis, and a few small descending colon diverticuli. The patient was treated conservatively with hydration, analgesics, and antiemetic medications.
Occult bleeding sources such as ulcers or diverticuli in males and females and heavy menstruation in females may be important contributors to RBC and iron loss over time.
Differentiating cystic lesions from solid mass lesions, lacrimal sac diverticuli.