How important is rigid proctosigmoidoscopy in localizing rectal cancer?

Background: Colonoscopic localization of rectal and rectosigmoid tumors may be inaccurate. Rigid proctosigmoidoscopy has been suggested as an adjunctive technique to accurately localize rectal tumors as it may alter treatment options.

Methods: A retrospective review was performed of patients with rectal and rectosigmoid cancer from 2001 to 2006.