Colonoscopy
A colonoscopy is an exam used to look for changes such as swollen, irritated tissues, polyps or cancer in the large intestine (colon) and rectum.During a colonoscopy, a long, flexible tube is inserted into the rectum. A tiny video camera at the tip of the tube allows the doctor to view the inside of the entire colon.If necessary, polyps or other types of abnormal tissue can be removed through the scope during a colonoscopy. Tissue samples can be taken during a colonoscopy as well.
Your doctor may recommend a colonoscopy to:
- Investigate intestinal signs and symptoms. A colonoscopy can help your doctor explore possible causes of abdominal pain, rectal bleeding, chronic diarrhea and other intestinal problems.
- Screen for colon cancer. If you're age 45 or older and at average risk of colon cancer. If you have other risk factors, your doctor may recommend a screen sooner. Colonoscopy is one of a few options for colon cancer screening. Talk with your doctor about the best options for you.
- Look for more polyps. If you have had polyps before, your doctor may recommend a follow-up colonoscopy to look for and remove any additional polyps. .
- Treat an issue. Sometimes, a colonoscopy may be done for treatment purposes, such as placing a stent or removing an object in your colon.