Home > Diseases and Conditions > Angiodysplasia of the colon
  • We are sorry, but NCBI web applications do not support your browser and may not function properly. More information

PubMed Health. A service of the National Library of Medicine, National Institutes of Health.

A.D.A.M. Medical Encyclopedia [Internet]. Atlanta (GA): A.D.A.M.; 2013.

A.D.A.M. Medical Encyclopedia.

Angiodysplasia of the colon

Vascular ectasia of the colon; Colonic arteriovenous malformation

Last reviewed: January 22, 2013.

Angiodysplasia of the colon is swollen, fragile blood vessels in the colon. This can result in blood loss from the gastrointestinal (GI) tract.

Causes

Angiodysplasia of the colon is mostly related to the aging and degeneration of the blood vessels. It is more common in older adults. It is almost always seen on the right side of the colon.

Most likely, the problem develops out of normal spasms of the colon that lead to the enlargement of blood vessels in the area. When this swelling becomes severe, a tiny passageway develops between a small artery and vein. This is called an arteriovenous malformation. It is in this area of the colon wall that the patient is at risk for bleeding.

Rarely, angiodysplasia of the colon is related to other diseases of the blood vessels, including Osler-Weber-Rendu syndrome. It is not related to cancer. It is also different than diverticulosis, which is a more common cause of intestinal bleeding in older adults.

Symptoms

The symptoms vary.

Many times, older people have symptoms of weakness, fatigue and shortness of breath due to anemia. They may not have bleeding directly from the colon. Others may have bouts of mild or severe bleeding in which bright red blood comes from the rectum.

There is no pain associated with angiodysplasia.

Exams and Tests

Tests that may be done to diagnose this condition include:

Treatment

It is important to determine what is causing the bleeding in the colon and how fast blood is being lost. You may need to be admitted to a hospital. Fluids may be given through a vein, and blood products may be required.

Other treatment may be needed once the source of bleeding is found. Most patients stop bleeding on their own without any treatment.

If treatment is needed, it may involve:

  • Angiography to help block the blood vessel that is bleeding or to deliver medicine to help cause the blood vessels to tighten to stop the bleeding
  • Burning (cauterizing) the site of the bleed with heat or a laser using a colonoscope

In some instances, surgery is the only option. Removal of the entire right side of the colon (right hemicolectomy) may be done if heavy bleeding continues even after other treatments have been tried. Medicines (thalidomide and estrogens) may be used to help control the disease in some people.

Outlook (Prognosis)

Patients who have bleeding related to this condition despite having had colonoscopy, angiography, or surgery are likely to have more bleeding in the future.

The outlook remains good if the bleeding is controlled.

Possible Complications

When to Contact a Medical Professional

Call your health provider if rectal bleeding occurs.

Prevention

There is no known prevention.

References

  1. Hauser S. Vascular diseases of the gastrointestinal tract. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 145.
  2. Brandt LJ, Landis CS. Vascular lesions of the gastrointestinal tract. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease. 9th ed. Philadelphia, Pa: Saunders Elsevier; 2010:chap 36.

Review Date: 1/22/2013.

Reviewed by: George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, Bethanne Black, Stephanie Slon, and Nissi Wang.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

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 endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

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 endorsementscof those other sites. © 1997–2011 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

Copyright © 2013, A.D.A.M., Inc.

Figures

  • Digestive system organs.

PubMed Health Blog...

read all...

Read More

MedlinePlus.gov links to free, reliable, up-to-date health information from the National Institutes of Health (NIH) and other trusted health organizations.

Recent Activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...