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DictionarySeediverticulumEncyclopediaSeeDiverticulumileal diverticulum
diverticulum [di″ver-tik´u-lum] (pl. diverti´cula) (L.) a circumscribed pouch or sac occurring normally or created by herniation of the lining mucous membrane through a defect in the muscular coat of a tubular organ. See illustration. Intestinal diverticula. From Dorland's, 2000.ileal diverticulum Meckel's diverticulum.intestinal diverticulum a pouch or sac formed by hernial protrusion of the mucous membrane through a defect in the muscular coat of the intestine.Meckel's diverticulum an occasional sacculation or appendage of the ileum, derived from an unobliterated yolk stalk.pressure diverticulum (pulsion diverticulum) a sac or pouch formed by hernial protrusion of the mucous membrane through the muscular coat of the esophagus or colon as a result of pressure from within.traction diverticulum a localized distortion, angulation, or funnel-shaped bulging of the esophageal wall, due to adhesions resulting from an external lesion.ileal diverticuluma remnant of the proximal part of the yolk stalk within the embryo that arises as a fingerlike diverticulum, 3-6 cm long, from the antimesenteric border of the ileum between 40 and 50 cm from the ileocecal junction; it may be attached to the umbilicus. If its mucosa includes gastric tissue, peptic ulceration and bleeding may result. Synonym(s): Meckel diverticulumMec·kel di·ver·ti·cu·lum (mek'el dī'vĕr-tik'yū-lŭm) The remains of the yolk stalk of the embryo, which, when persisting abnormally as a blind sac or pouch in the adult, is located on the ileum a short distance above the cecum; it may be attached to the umbilicus and, if the lining includes gastric mucosa, peptic ulceration and bleeding can occur.
Synonym(s): ileal diverticulum. |