File:Meckel's diverticulum 01.jpg

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Meckel's Diverticulum

Meckel's diverticulum, a photograph of a gastrointestinal tract abnormality (in the adult) due to midgut developmental abnormality. The abnormality is shown as the blind-ended tube lower right of image.

This abnormality is a very common (incidence of 1–2% in the general population) and occurs from the improper closure and reabsorption of the yolk stalk (vitelline duct, omphalomesenteric duct). This transient connection lies between the early midgut region and the yolk sac.

Named after Johann Friedrich Meckel (1781 – 1833) (the younger) a German anatomist who identified the abnormality origin in 1820.

 ICD-11 LB15 Structural developmental anomalies of small intestine - LB15.0 Meckel diverticulum
A congenital abnormality characterized by the outpouching or sac formation in the ileum. It is a remnant of the embryonic yolk sac in which the vitelline duct failed to close. During early gestation, the ompahlomesenteric or vitelline duct connects the fetal yolk sac to the primitive gut. By 7-8 weeks of gestation, this duct is normally completely obliterated. A Meckel diverticulum results when this structure fails to resorb completely.


Armed Forces Institute of Pathology

This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code.

Abnormality Links: Gastrointestinal Tract - Abnormalities | Intestine Development | Gastrointestinal Tract

Cite this page: Hill, M.A. (2024, April 24) Embryology Meckel's diverticulum 01.jpg. Retrieved from

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current00:04, 7 August 2010Thumbnail for version as of 00:04, 7 August 2010341 × 480 (74 KB)S8600021 (talk | contribs)==Meckel's Diverticulum== Description: Photograph of a Meckel's Diverticulum Source: Armed Forces Institute of Pathology Author: Unknown Permission: Public Domain Category:Gastrointestinal Tract Category:Abnormal Development