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Horseshoe fistula is one of the most. complex and potentially morbid. conditions faced in a modern anorectal. surgery. Hanley, 1965 reported his. original procedure for horseshoe fistula. which involved complete division of the. posterior 12 o'clock sphincter mechanism.
A fistula is an abnormal tube-like passage from a normal cavity or tube to a free surface or to another cavity. I will try to explain some information about fistulas in the oral cavity and nearby structures. The answer to your question is so broad that I believe you need a full range of specialists to give its right.