Should ileal pouch-anal anastomosis include mucosectomy?

Area of Science:

• Colorectal Surgery
• Gastroenterology
• Oncology

Background:

• Debate exists regarding the benefits of mucosectomy during pouch surgery for ulcerative colitis (UC) and familial adenomatous polyposis (FAP).
• Mucosectomy offers more complete diseased mucosa removal but may compromise functional outcomes.
• The study investigates the trade-offs between functional results and disease control with mucosectomy.

Purpose of the Study:

• To evaluate the functional outcomes and disease control associated with mucosectomy in ileal pouch anal anastomosis (IPAA) surgery.
• To determine the impact of mucosectomy on stool continence, anal pressures, and rates of cuffitis, dysplasia, and cancer.
• To provide evidence-based recommendations for the use of mucosectomy in UC and FAP patients undergoing pouch surgery.

Main Methods:

• Systematic literature search of Medline, Embase, Ovid, and Cochrane databases.
• Inclusion of studies comparing pouch surgery with and without mucosectomy.
• Meta-analysis to assess functional outcomes (stool seepage, anal pressures) and disease control rates (cuffitis, dysplasia, cancer).

Main Results:

• Mucosectomy is associated with poorer functional outcomes, including increased nighttime stool seepage and reduced resting and squeeze anal pressures.
• The degree of anal manipulation during mucosectomy is the likely cause of functional impairment.
• While mucosectomy may offer some benefits in disease control, these did not reach statistical significance in the reviewed literature.

Conclusions:

• Stapled anastomosis without mucosectomy is preferred for IPAA due to superior functional outcomes.
• Mucosectomy provides marginal benefits like reduced inflammation and dysplasia in UC patients and fewer polyps in FAP patients.
• Mucosectomy should be reserved for patients with a high risk of retained rectal cuff disease.