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  • Title: [Factors associated with ileal-pouch related fistulas in 100 consecutives patients who underwent restorative proctocolectomy].
    Author: Pronio A, Di Filippo A, Pitasi F, Caporilli D, Vestri A, Montesani C.
    Journal: Clin Ter; 2011; 162(4):319-25. PubMed ID: 21912819.
    Abstract:
    OBJECTIVE: The pouch-related fistulas range in literature from 2% to 16% and they can be cause of failure of the intervention of restorative proctocolectomy. Aim of this study was to examine factors associated with theirs development and to identify theirs possible etiology and pathogenesis. MATERIALS AND METHODS: Retrospective study focusing on 100 consecutive patients who underwent restorative proctocolectomy with pouch-anal anastomosis (IPAA). Patients with fistula and patients without fistula have been identified and the fistula type, the time from surgery and the site relative to IPAA have been recorded. Patients' demographics, co-morbidity or related medical history, clinical indication for treatment, surgical method, histological diagnosis, length of follow-up, early and late postoperative complications have been reviewed, and data collected have been compared among the two groups through univariate analysis. RESULTS: The overall incidence of fistulas was of 10% (10 cases); 8 cases had pouch-vaginal fistulas, involving the distal tract of the vagina, and associated with pouch-perineal fistulas in 2 cases; 1 case had pouch-vulval fistula; 1 case had a complex pouch-perineal fistula. Three fistulas were precocious, all associated with an IPAA leak; 2 of these cases also had pelvic sepsis while the third had delayed diagnosis of Crohn’s disease. Seven fistulas had a late development. Four fistulas occurred at the level of the IPAA; 5 fistulas were located below the IPAA, and 1 fistula originated above and below the IPAA. When the two groups of patients were compared we found that there was an higher percentage of perineal or anal disease (40.0% vs 2.2%; p <0.001), of extraintestinal manifestations of inflammatory bowel disease (IBD) (40.0% vs 3.3%, p <0.001), and of leak of the IPAA (40.0% vs 11.1%; p <0.05) in the group with fistula vs the group without fistula. CONCLUSIONS: A direct link with the leak of the IPAA appears in all the early fistulas, while the cryptoglandular infection was suggested as a possible cause of the late fistulas located below the IPAA; the association with the extraintestinal manifestations of IBD could show a correlation between the fistulas and an higher specific activity of the underlying chronic inflammatory disease.
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