comparison between to groups of patients with simple anal fistula one group underwent sistulotomy the other underwent fistulotomy and marsupialization of the wound edges , the investigator tested the incidence of postoperative complications , time of wound healing , operative time
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operative time in minutes
Timeframe: intraoperative
postoperative pain using visual analogue scale
Timeframe: 1 week
postoperative complications measured by clinical examination and anal sphincter manometry
Timeframe: 1 year
wound healing time
Timeframe: 1 year