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Risks and Complications

A colonoscopy is a common procedure, and complications are extremely unlikely.

However, any procedure involves some risk. The risks of a colonoscopy include:

  • The device perforating, or poking a hole in, the lining of the colon
  • Bleeding in the large intestine
  • The doctor not seeing a cancerous growth
  • The patient having a reaction to the medication used in the procedure

Such complications may require a blood transfusion and/or surgery.

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