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Anoscopy

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Contents of this page:

Illustrations

Anal biopsy
Anal biopsy

Definition    Return to top

Anoscopy is a method to view the rectal area, including the anus, anal canal, and lower rectum.

How the Test is Performed    Return to top

A digital rectal exam is first done to make sure there isn't anything blocking the rectal area. After this is done, a lubricated instrument (anoscope) is placed a few inches into the rectum. You will feel some pressure when this is done.

The anoscope has a light on the end, so the health care provider can see the entire anal canal. A specimen for biopsy can be taken if needed.

How to Prepare for the Test    Return to top

A laxative, enema, or other preparation may be given prior to the procedure so that you can completely empty your bowels.

How the Test Will Feel    Return to top

There will be some pressure during the procedure, and you may feel the need to have a bowel movement. You may feel a pinch when a biopsy is taken.

Why the Test is Performed    Return to top

This test may be used to determine whether you have hemorrhoids, anal polyps, tumors, inflammation, fissures, or infection.

Normal Results    Return to top

The anal canal appears normal in size, color, and tone. There is no evidence of bleeding, polyps, hemorrhoids, or other abnormal tissue.

What Abnormal Results Mean    Return to top

Abnormal results may indicate hemorrhoids, an abscess, inflammation, infection, fissures, tumors, or polyps (benign or malignant).

Risks    Return to top

There are few risks. If a biopsy is needed, there is a slight risk of bleeding and mild pain.

Update Date: 10/16/2006

Updated by: J.A. Lee, M.D., Division of Surgery, UCSF, San Francisco, CA. Review provided by VeriMed Healthcare Network.

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