The results of anal fistula treatments have improved with the development of the anal fistula operative technique. However, there are still complications, such as recurrence and anal incontinence. To this end, the authors classified anal fistulas by using Sumikoshi's classification and performed an anal-sphincterpreserving procedure. Methods: We experienced 98 anal fistula cases involving 86 patients who underwent anal fistula operations at The Catholic University of Korea, St. Vincent's Hospital from January 2001 to December 2006. This study was done retrospectively by chart review and telephone questioning. The follow-up period was from 2 to 72 months (mean 29.5, SD: 19.1).
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Han et al. (2007) studied this question.
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