Effect of topical mesalazine over adenomas incidence in rectal stumps and ileal pouches of familial adenomatous polyposis patients submitted to colectomy.

Interventions: Mesalazine, 1g per day of rectal foam, for 12months Primary outcome(s): New adenomas (larger than 5mm) incidence in the rectal stumps or ileal pouches, as assessed by endoscopy[At study entry and six and twelve months after mesalazine use] Study Design: Purpose: Prevention; Allocation: Non-randomised trial; Masking: Open (masking not used);Assignment: Single group;Type of endpoint: Efficacy