Doctors Answers (2)

David Pound, M.D.
Answered on: 6/28/2012
A sigmoidoscopy is visualizes a smaller portion of the colon than a colonoscopy does. A complete colonoscopy looks at the entire large intestine. Which procedure would be best is dependent on what the patient symptom are.

Harsha Vittal, M.D.
Answered on: 6/19/2012
They carry the same risk. Colonoscopy is a better screening test and should be the test of choice.