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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.
PILONIDAL CYST AND FISTULA. It is a chronic wound tissue including skin in the region of the buttock crease and has nothing to do with the anus and anal canal. More frequent in males (approximately 3:1) and aged between 15 and 30 years, only rarely is complicated and requires surgical care over the age of 30.