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An abnormal outpocketing or sac on the wall of a hollow organ.



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.

References in periodicals archive ?
5 feet of the affected part of the jejunum with diverticuli (figure 3) with end-to-end jejuno-jejunal anastomosis was done.
Diverticuli is a false pulsion diverticuli, characterized by herniation of mucosa and submucosa through the muscular layer in places of minor resistance to the intraluminal pressure typically at the mesenteric side where blood vessels penetrate the intestinal wall.
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.
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.
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.
The etiologic factors involved in the sialolith formation can be classified into two different groups: on one hand, saliva retention due to morpho-anatomic factors (salivary duct stenosis, salivary duct diverticuli, etc.
Differentiating adenocarcinoma from diverticulitis Diverticulitis Adenocarcinoma Diverticuli Present +/- Present Regionalfat Stranding Rare stranding Transition Smooth Shouldering Root mesentery Fluid No fluid Wall thickening Mild Severe Length involvement Several cm Focal Signs Comma, centipede Shouldering Lymph node None/small Present
A subsequent CT seen of her abdomen was negative, and a barium enema revealed only multiple sigmoid diverticuli.
A total of 80 patients from surgery OPD in age group 10 to 70 years with complaints suggestive of urethral strictures, calculi, tumor, diverticuli, anterior urethral fistula, urethritis, palpable anterior urethral irregularities and ventral penile curvature.
Differentiation of colonic diverticulitis from adenocarcinoma Favors diverticulitis Favors adenocarcinoma Diverticuli [+ or -] Diverticuli Stranding >wall thickening No stranding, or stranding ("disproportionate" fat stranding < wall thickening Comma sign No comma sign Centipede sign No centipede sign Fluid at root of sigmoid mesocolon No fluid Mild, smooth wall thickening Severe, irregularwall thickening Gradual transition Abrupt transition, shouldering Short (5-10 cm) segment affected Focal (<5 cm) segment affected No lymph nodes Small to large lymph nodes