A colonoscopy poses few risks. Rarely, complications of a colonoscopy may include:
- Adverse reaction to the sedative used during the exam
- Bleeding from the site where a tissue sample (biopsy) was taken or a polyp or other abnormal tissue was removed
- A tear in the colon or rectum wall (perforation)
After discussing the risks of colonoscopy with you, your doctor will ask you to sign a consent form authorizing the procedure.
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