In Colonoscopy test, a doctor passes a thin tube (endoscope / colonoscope) to examine the inner lining of large intestine, which consists of the colon and the rectum. Colonoscopy is done to detect polyps, bleeding ulcers, tumors, or inflamed areas. It can also be used to find the causes behind abdominal pain, irregular bowel habits, or sudden rectal bleeding. Colonoscopy is also one of the standard procedures for screening colorectal cancer.
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