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How does a colonoscopy help diagnose Crohn's disease?

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Colonoscopy is the most important tool in diagnosing Crohn's disease. A colonoscopy can provide a view of all the large intestine and often the end of the small intestine, which is frequently affected by Crohn's. (A sigmoidoscopy examines only the lowest part of the large intestine.) These procedures often give the most accurate information about the intestines. The doctor can directly view the colon to check for signs of ulcers, inflammation, or bleeding. The tests may be better at detecting small ulcers or inflammation than other techniques, and they can be used to assess the severity of any inflammation. The doctor can also take small samples of tissue to examine under a microscope, known as a biopsy, to determine whether the tissue shows signs of Crohn's disease or other problems.

From: Diagnosing Crohn's Disease WebMD Medical Reference

SOURCES:

National Digestive Diseases Information Clearinghouse: "Crohn's Disease."

WebMD Medical Reference: "Diagnosing Crohn's Disease."

American College of Gastroenterology: "Inflammatory Bowel Disease."

Reuters Health: "Capsule endoscopy may miss post-op recurrence of Crohn's disease."

Reviewed by Minesh Khatri on June 14, 2018

SOURCES:

National Digestive Diseases Information Clearinghouse: "Crohn's Disease."

WebMD Medical Reference: "Diagnosing Crohn's Disease."

American College of Gastroenterology: "Inflammatory Bowel Disease."

Reuters Health: "Capsule endoscopy may miss post-op recurrence of Crohn's disease."

Reviewed by Minesh Khatri on June 14, 2018

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What happens during a colonoscopy or a sigmoidoscopy for Crohn's disease?

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