Angiodysplasia of the Colon
(Colonic Angiodysplasia, Arteriovenous Malformations [AVM] of the Colon)
Angiodysplasia of the colon occurs when enlarged and fragile blood vessels in the colon result in occasional bleeding in the gastrointestinal (GI) tract. If you think you may have this condition, contact your doctor immediately.
Normal Anatomy of the Intestines
Angiodysplasia of the colon can be caused by:
- Injury to the GI tract
- Heart problems
- Kidney problems
- Lung problems
- von Willebrand's disease (a disorder of the blood)
- Blood vessel problems
- Normal contractions of the colon
A risk factor is something that increases your chance of getting a disease or condition. The following risk factors increase your chance of having angiodysplasia of the colon. If you have any of these risk factors, tell your doctor:
- Age: older than 60 years
People with angiodysplasia of the colon may or may not have symptoms. If you experience any of these symptoms do not assume it is due to angiodysplasia of the colon. These symptoms may be caused by other health conditions. If you experience any one of them, see your physician.
- Bleeding from the rectum
- Shortness of breath
- Dark, tarry stools
Your doctor will ask about your symptoms and medical history, and perform a physical exam. Tests may include the following:
Talk with your doctor about the best treatment plan for you. Treatment may not be necessary, since about 90% of cases of angiodysplasia of the colon stop bleeding on their own. Treatment options include the following:
Your doctor can often cauterize (burn tissues with thermal heat to seal bleeding blood vessels) the site of the bleeding during a colonoscopy.
The blood supply to the bleeding area can be clotted through angiography.
Hormonal therapy with estrogen can be helpful for some causes.
Surgery to remove the affected area of the colon may sometimes be necessary.
AGS Foundation for Health in Aging
National Digestive Diseases Information Clearinghouse
Canadian Association of Gastroenterology
Canadian Digestive Health Foundation
Angiodysplasia. DynaMed website. Available at: http://dynamed102.epnet.com/Detail.aspx?id=114051 . Accessed November 29, 2006.
American Gastroenterological Association. AGA guideline: evaluation and management of occult and obscure gastrointestinal bleeding. Gastroenterology . 2000;118:197.
American Gastroenterological Association website. Available at: http://www.gastro.org .
Disorders of the digestive system. The AGS Foundation for Health in Aging website. Available at: http://www.healthinaging.org/agingintheknow/chapters_ch_trial.asp?ch=47#colonic_angio . Accessed November 27, 2006.
Last reviewed November 2008 by
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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