What is a colonoscopy?

A colonoscopy is an investigation that involves looking directly at the lining of your large bowel. A thin, flexible tube with a tiny camera attached (a colonoscope) is passed into your back passage and guided around your bowel. If polyps are found, most can be removed painlessly, using a wire loop passed down the colonoscope tube. These tissue samples will be checked for any abnormal cells that might be cancerous. Consultant Surgical Oncologist, Dr Saurabh Mohite explains more about Colonoscopy

  •  About five in 10 people who have a colonoscopy will have a normal result (they do not have cancer or polyps). 
  • About four in 10 will be found to have a polyp, which if removed may prevent cancer developing.
  • About one in 10 people will be found to have cancer when they have a colonoscopy
A colonoscopy is the most effective way to diagnose bowel cancer. For most people, having a colonoscopy is a straightforward procedure. However, as with most medical procedures, there is the possibility of complications. These can include heavy bleeding (about a one in 150 chance) that needs further investigation or medical advice.

The colonoscope can cause a hole (perforation) in the wall of the bowel (about a one in 1,500 chance). In extremely rare cases, colonoscopy may result in death. Current evidence suggests that this may only happen in about one in 10,000 cases. Remember, most people who complete the FOB test will not need a colonoscopy


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Disclaimer: The information provided here should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. The information is provided solely for educational purpose and should not be considered a substitute for medical advice.