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What Is It?

Meckel's diverticulum is a small pouch in the wall of the lower small intestine. The pouch is a congenital (present at birth) abnormality that affects approximately 2% of the population. The pouch, or diverticulum, seems to be leftover tissue from the development of the digestive system. This tissue normally is reabsorbed before birth. When it contains gastric (stomach) tissue, it is more likely to cause bleeding.

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From Health A-Z, Harvard Health Publications. Copyright 2007 by the President and Fellows of Harvard College. All rights reserved. Written permission is required to reproduce, in any manner, in whole or in part, the material contained herein. To make a reprint request, contact Harvard Health Publications. Used with permission of StayWell.

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