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4. Sigmoidoscopy vs. Colonoscopy

Sigmoidoscopies and colonoscopies are similar, but there are differences between the two. Sigmoidoscopies are less invasive and do not require anesthesia. Both are screening tools for colon cancer, but a colonoscopy allows the doctor to examine the entire colon rather than only the lower portion. If a sigmoidoscopy locates polyps, a colonoscopy is often the next step.

endoscope colonoscopy sigmoidoscopy Andrey Shevchuk / Getty Images

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This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.