How important is rigid proctosigmoidoscopy in localizing rectal cancer?

Area of Science:

• Gastroenterology
• Surgical Oncology

Background:

• Colonoscopic tumor localization in the rectum and rectosigmoid can be imprecise.
• Rigid proctosigmoidoscopy is a potential adjunctive method for accurate rectal tumor staging.

Purpose of the Study:

• To evaluate the impact of rigid proctosigmoidoscopy on treatment decisions for rectal and rectosigmoid tumors.
• To compare tumor localization accuracy between colonoscopy and rigid proctosigmoidoscopy.

Main Methods:

• Retrospective review of patients with rectal and rectosigmoid cancer (2001-2006).
• Stratification of patients into four anatomic regions based on colonoscopic findings.
• Comparison of tumor distances from the anal verge using colonoscopy versus rigid proctosigmoidoscopy.

Main Results:

• Rigid proctosigmoidoscopy altered treatment options in 21% of lower rectal, 14% of middle rectal, 38% of upper rectal, and 29% of rectosigmoid tumors.
• Overall, the technique impacted treatment decisions for 25% of patients studied.

Conclusions:

• Rigid proctosigmoidoscopy significantly influences treatment strategies for rectal tumors.
• This method should be routinely employed for patients with suspected rectosigmoid or rectal cancers identified via colonoscopy.