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  • Title: Outcome after surgical resection for high-grade anal intraepithelial neoplasia (Bowen's disease).
    Author: Brown SR, Skinner P, Tidy J, Smith JH, Sharp F, Hosie KB.
    Journal: Br J Surg; 1999 Aug; 86(8):1063-6. PubMed ID: 10460644.
    Abstract:
    BACKGROUND: High-grade anal intraepithelial neoplasia (Bowen's disease) may predispose to anal carcinoma. Treatment options include surgical resection but effectiveness remains uncertain. This paper reports long-term follow-up of patients with high-grade anal intraepithelial neoplasia treated by surgical resection. METHODS: Between 1989 and 1996, 46 patients were identified with high-grade anal intraepithelial neoplasia. Thirty-four underwent local excision of all macroscopically abnormal disease and the resulting defect was left open, closed primarily or skin grafted. Regular follow-up subsequently included anoscopy and biopsy of any suspicious lesions. RESULTS: Median follow-up was 41 (range 12-104) months. Total excision was difficult; 19 patients had histological evidence of incomplete excision at the time of initial resection. Some 12 of 19 had histo-logically proven recurrent high-grade intraepithelial neoplasia within 1 year. Even with microscopically complete excision two of 15 patients subsequently developed recurrent high-grade intraepithelial neoplasia at 6 and 32 months after operation. No patient developed carcinoma but five had complica-tions of anal stenosis or faecal incontinence. CONCLUSION: Although no definite recommendations can be made for the treatment of high-grade anal intraepithelial neoplasia, these results illustrate some potential drawbacks of surgical excision with a high potential for incomplete excision and persistent disease, even after complete excision in some patients, and a high morbidity rate.
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