What is a colonoscopy?

Colonoscopy is a procedure that enables an examiner (usually a gastroenterologist) to evaluate the inside of the colon (large intestine or large bowel). The colonoscope is a four-foot long, flexible tube about the thickness of a finger with a camera and a source of light at its tip. The tip of the colonoscope is inserted into the anus and then is advanced slowly, under visual control, into the rectum and through the colon usually as far as the cecum, which is the first part of the colon. Usually, it also is possible to enter and examine the last few inches of the small intestine (terminal ileum).

Individuals with a previous history of polyps or colon cancer and certain individuals with a family history of some types of non-colonic cancers or colonic problems that may be associated with colon cancer (such as colonic polyps) may be advised to have periodic colonoscopies because their risks are greater for polyps or colon cancer.

How often should one undergo colonoscopy depends on the degree of the risk for cancer and the abnormalities found at previous colonoscopies. One widely accepted recommendation has been that even healthy people at normal risk for colon cancer should undergo colonoscopy at age 50 and every 10 years thereafter for the purpose of removing colonic polyps before they become cancerous.

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Source :  by VISHWA GASTRO & LIVER CLINIC, Nava Vadaj, Ahmedabad.

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