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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 ?
Consequently, a chest computed tomography with contrast was ordered, revealing a partially thrombosed Kommerell diverticulum in the aberrant right subclavian artery (Fig.
The size of the diverticulum is helpful in guiding the surgical approach.
To the best of our knowledge, this case is the second report of a Dieulafoy's lesion located in the esophageal diverticulum (7).
Diverticulum and PVID between January 1, 2014 and January 1, 2016.
The hepatic diverticulum grows into the septum transversum, which is a splanchnic mesodermal mass extending between the heart anlage and the mesentery (1-3).
7) In volvulus, the diverticulum acts as a pivot, commonly around the adhesive band (2) or the fluid filled involved heavier segment might be responsible for initiating the volvulus.
After removing the diverticular stone via percutaneous nephrolithotomy (PCNL), dilatation of the calyceal diverticular neck and electrocoagulation of the diverticulum wall are performed.
A diverticulum is an abnormal sac or pouch formed at the weak portion in wall of digestive system.
Unfortunately, in the present series, the exact relation of the diverticulum and the papilla was not always noted explicitly in the endoscopy reports.
There was a Meckel's diverticulum with fibrous band extending to the anterior abdominal wall (Figure 5).
Manual compression of the diverticulum showed subcutaneous urine leakage.
If an inflamed diverticulum bursts, an abscess may form next to the colon or peritonitis may develop.