患者，男，19岁。半年前不慎从树上跌落地面，右臀部被树枝刺伤，在当地医院进行了处理，具体不详，肛门疼痛时轻时重，伤口不愈，反复流脓。1996年1月初来我科就诊，见右臀部跟胆线6cm、9点钟处有破溃D，口径约有0．Zcm，边缘红肿高出皮肤。用探针探查内口位于7点钟距肛线6cm Patient, male, 19 years old. Six months ago, the ground was accidentally dropped from the tree, the right buttocks were stab wounds, the local hospital for treatment, specifically unknown, anal pain when light, wound healing, repeated pus. Early January 1996 to our clinic, see the right hip with the gallbladder line 6cm, 9 o’clock at the rupture D, caliber about 0. Zcm, the edge of the swelling above the skin. Probe with the mouth at 7 o’clock from the anal line 6cm