Diverticulum

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diverticulum

[‚dī·vər′tik·yə·ləm]
(medicine)
An abnormal outpocketing or sac on the wall of a hollow organ.

Diverticulum

 

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 ?
Diverticulitis (inflamed diverticula) is commonly treated with antibiotics and with a liquid diet so your intestines can heal.
Diverticula range from pea-sized to marble-sized and form when increased pressure from gas, waste or straining due to constipation is applied to weak areas of the intestinal wall.
To address the histopathologic features most commonly identified in bladder diverticula, including features associated with invasive carcinoma, and to address the clinical outcomes in this population, we evaluated all bladder diverticula histopathologically sampled at the Cleveland Clinic.
Fluid was observed within the mandibular diverticula of the infraorbital sinus (Fig 3).
As in our case, urethral diverticula may present with swelling on the penoscrotal region that increase during urination, dysuria, weak urine stream, and post-voiding dribbling.
Anatomic abnormalities, such as duodenal diverticula, may represent a rare but important etiological factor of pancreatitis.
(4) Clinical classification of the diverticula can be done as follows; asymptomatic group with the highest incidence of 60%, (8) chronic pain and malabsorption group (also called as minimally symptomatic group) and acute complications group.
The diverticula themselves generally cause no symptoms unless diverticulosis progresses to diverticulitis.
Acquired diverticula are associated with a tumor, healing ulcer, or radiation.
Smallhorn, "Evolution of fetal ventricular aneurysms and diverticula of the heart: an echocardiographic study," American Journal of Perinatology, vol.
There is no consensus on the cause of calyceal diverticula. Dysfunction of the sphincters surrounding the calyces, which facilitate synchronized filling and emptying [3], has been proposed as one possible cause.
MRI, however, can give additional information such as if a mass were present within the diverticula [10].