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Meckel's diverticulum

Definition

A Meckel's diverticulum is a pouch on the wall of the lower part of the intestine that is present at birth (congenital). The diverticulum may contain tissue that is identical to tissue of the stomach or pancreas.

Causes, incidence, and risk factors

A Meckel's diverticulum is tissue left over from structures in the unborn baby's digestive tract that were not fully reabsorbed before birth. Approximately 2% of the population has a Meckel's diverticulum, but only a few people develop symptoms.

Symptoms

  • Abdominal discomfort or pain ranging from mild to severe
  • Passing of blood in the stool

Symptoms often occur during the first few years of life, but may not start until adulthood.

Signs and tests

  • Blockage of the intestine
  • Blood in the stool - visible or invisible (occult)
  • Inflammation of the pouch (diverticulitis)

Tests:

Treatment

Surgery to remove the diverticulum is recommended if bleeding develops. In these rare cases, the segment of small intestine that contains the diverticulum is surgically removed. The ends of the intestine are sewn back together.

You may need iron replacement to correct anemia. If you have a lot of bleeding, you may need a blood transfusion.

Expectations (prognosis)

Full recovery can be expected with surgery.

Complications

  • Excess bleeding (hemorrhage) from the diverticulum
  • Folding of the intestines (intussusception), a type of blockage
  • Peritonitis
  • Tear (perforation) of the bowel at the diverticulum

Calling your health care provider

See your health care provider promptly if your child passes blood or bloody stool or complains repeatedly of abdominal discomfort.

References

Kahn E, Daum F. Anatomy, histology, embryology, and developmental anomalies of the small and large intestine. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger & Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 96.


Review Date: 11/11/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine University of Washington School of Medicine; and George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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