Aneuploidy and columnar cuff surveillance after stapled ileal pouch-anal anastomosis in ulcerative colitis

PURPOSE: A stapled pouch-anal anastomosis without mucosectomy is widely used in restorative proctocolectomy. Uncertainty exists about the longer-term outcome of retaining a columnar cuff of epithelium in the anal canal and about the need for surveillance of the columnar cuff. The aim of this article was to assess the ability to obtain biopsies of the columnar cuff, to assess the risk of dysplasia, and to search for the presence of aneuploidy as an early of marker of dysplasia in nondysplastic epithelium. METHOD: A total of 457 biopsy specimens were taken during 203 examinations of 113 patients. All biopsy specimens were stained with hematoxylin and eosin and examined by microscopy. One hundred thirty-two of these biopsy specimens from 67 patients were frozen and analyzed by flow cytometry for aneuploidy. RESULTS: Mean follow-up after pouch formation was 2.5 years, and the time after diagnosis of ulcerative colitis was 10.1 years. Successful columnar cuff biopsies were done on 93 percent of patients. There was no dysplasia. Two biopsy specimens from one patient had aneuploidy. CONCLUSION: To date, neoplastic change in the columnar cuff is rare. A selective policy of surveillance biopsies is recommended that includes patients greater than ten years after the diagnosis of ulcerative colitis and patients with dysplasia or cancer in their proctocolectomy specimen, but long-term follow-up data are needed.Mr. Thompson-Fawcett was funded by the Oxford Radcliffe Colorectal Surgery Research Trust Fund, Oxford Radcliffe NHS Trust, United Kingdom.Presented in part at the European Council of Coloproctology Biennial Meeting, Edinburgh, United Kingdom, June 17 to 19, 1997. Published in abstract form: Thompson-Fawcett M, Warren B, Mortensen N. Surveillance of the columnar cuff after restorative proctocolectomy. Int J Colorectal Dis 1997;12:163.