n.; pl. diverticula
a sac or pouch formed at weak points in the walls of the alimentary tract. They may be caused by increased pressure from within (pulsion diverticula) or by pulling from without (traction diverticula). A pharyngeal diverticulum occurs in the pharynx and may cause difficulty in swallowing. Oesophageal diverticula occur in the middle or lower oesophagus (gullet); they may be associated with muscular disorders of the oesophagus but rarely cause symptoms. Gastric diverticula affect the stomach (usually the upper part) and cause no symptoms. Duodenal diverticula occur on the concave surface of the duodenal loop; they may be associated with dyspepsia and an increased risk of choledocholithiasis, but usually cause few symptoms. Jejunal diverticula affect the small intestine, are often multiple, and may give rise to abdominal discomfort and malabsorption due to growth of bacteria within them. Meckel's diverticulum occurs in the ileum, about 35 cm from its termination, as a congenital abnormality. It may become inflamed, mimicking appendicitis; if it contains embryonic remnants of stomach mucosa it may form a peptic ulcer, causing pain, bleeding, or perforation. Colonic diverticula, affecting the colon (particularly the lowest portion), become commoner with increasing age and often cause no symptoms. However they are sometimes associated with abdominal pain or altered bowel habit (see diverticular disease) or they may become inflamed (see diverticulitis).

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  • Diverticulum — Classification and external resources MeSH D004240 A diverticulum (plural: diverticula) is medical or biological term for an outpouching of a hollow (or a fluid filled) structure in the body. Depending upon which layers of the structure are… …   Wikipedia

  • DIVERTICULUM — in Glossis, εντροπὴ, καμπὴ ὁδοῦ, i. e. semita quales a via regia secantur aliorsum. Hinc ad fluvios vox traducta. Geographusineditus Salmas. de Nilo, Currit per milia DXX. nullum ostendit diverticulum. Ubi diverticuli nomine intelligit minores… …   Hofmann J. Lexicon universale

  • diverticulum — [dī΄vər tik′yo͞o ləm] n. pl. diverticula [dī΄vər tik′yo͞olə] [L diverticulum, var. of deverticulum, a bypath < devertere, to turn aside: see DE & VERSE] Anat. a normal or abnormal pouch or sac opening out from a tubular organ or main cavity …   English World dictionary

  • Diverticulum — Div er*tic u*lum, n.; pl. {Diverticula}. [L. See {Diverticle}.] (Anat.) A blind tube branching out of a longer one. [1913 Webster] || …   The Collaborative International Dictionary of English

  • diverticulum — blind tube (anatomical), 1819, Mod.L., from L. deverticulum a bypath, from devertere to turn aside (see DIVERT (Cf. divert)) …   Etymology dictionary

  • diverticulum — (Order Anostraca): Midgut diverticulum [Stachowitsch, 1992]. (Class Cephalocarida): One of two simple glandular outpocketings of digestive tract; located in head and opening into anterior region of midgut [Stachowitsch, 1992]. (Order Leptostraca) …   Crustacea glossary

  • Diverticulum — A small bulging sac pushing outward from the colon wall is a diverticulum. As a person ages, pressure within the large intestine (colon) causes pockets of tissue (sacs) that push out from the colon walls. The plural is diverticula. Diverticula… …   Medical dictionary

  • diverticulum — diverticular, adj. /duy veuhr tik yeuh leuhm/, n., pl. diverticula / leuh/. Anat. a blind, tubular sac or process branching off from a canal or cavity, esp. an abnormal, saclike herniation of the mucosal layer through the muscular wall of the… …   Universalium

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