患者女,29岁。因发现肛旁无痛性肿块2周余,以“肛瘘”收入院。2周前患者无意中发现肛门左侧有一肿块,自行触摸约2cm×2cm大小,表面光滑,无疼痛、发热及排便障碍,曾前往当地医院就诊,以“肛旁炎性肿块”给予输液及抗感染治疗1周,效果不佳,遂来我院诊治。体格检查:体温36.5℃,脉 Patient female, 29 years old. Because of anal painless mass found more than 2 weeks to “anal fistula” income hospital. 2 weeks ago, the patient inadvertently found a lump on the left side of his anus and touched himself about 2 cm × 2 cm in size. The surface was smooth and free of pain, fever and defecation. He had visited a local hospital and given “fluid and anti-inflammatory” Infection treatment for 1 week, the effect is not good, then came to our hospital for diagnosis and treatment. Physical examination: body temperature 36.5 ℃, pulse