Abstract
PURPOSE: The aim of this study was to establish the prevalence of adenomatous polyps in the ileal pouch of patients with familial adenomatous polyposis. METHOD: Forty-three patients who had an ileal pouch for familial adenomatous polyposis were invited to have a careful endoscopic examination of their pouch, including dye spraying. The number of polyps was recorded, and up to ten were biopsied. In addition, four random biopsy specimens were taken from the proximal and four from the distal pouch. RESULTS: Thirty-three patients with a median age of 36 (range, 14–63) years who had a pouch (5 Kock and 28 pelvic) for a median of 7 (range, 1–19) years accepted the invitation. Twenty-one patients (64 percent) had endoscopically identified polyps, the number of polyps ranging from 1 to 100 (median, 10) and varying in size from 1 to 3 mm. Fourteen patients (42 percent) had adenomatous polyps and 4 of these also had microadenomas on random biopsies. Nine of the 14 patients with adenomas also had lymphoid polyps. Seven patients had lymphoid polyps only and two of these patients had a microadenoma on random biopsy. Four of 12 patients with no visible polyps had microadenomas in their random biopsies. The presence of adenomatous polyps (Pearson's correlation;P < 0.01) increased with the age of the pouch. In total, 20 of 33 (60 percent) patients had adenomas and or microadenomas. CONCLUSION: Adenomatous polyps occur frequently in ileal pouches. These findings are of concern, and therefore, regular surveillance seems warranted until the natural history of these adenomatous polyps is determined.
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Mark Thompson-Fawcett was supported by the Axcan Pharma Inflammatory Bowel Disease Research Fellowship and a research grant from the International Organization for Inflammatory Bowel Disease.
Poster presentation at The American Society of Colon and Rectal Surgeons' 100th Anniversary and Tripartite Meeting, Washington, D.C., May 1 to 6, 1999, and the Royal Australian College of Surgeons Scientific Congress, Auckland, New Zealand, May 10 to 14, 1999.
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Thompson-Fawcett, M.W., Marcus, V.A., Redston, M. et al. Adenomatous polyps develop commonly in the ileal pouch of patients with familial adenomatous polyposis. Dis Colon Rectum 44, 347–353 (2001). https://doi.org/10.1007/BF02234731
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DOI: https://doi.org/10.1007/BF02234731