患者,女,50岁。1年前无意中发现肛周一蚕豆大肿物,后逐渐增大无痛。体检一般情况良好,胸腹部各器官检查及实验室检查均正常。胸膝卧位,肛周3点处见一1×2×3cm大小的肿物,质韧与皮肤粘连不易活动无压痛,肛诊直肠无异常。临床诊断为肛周脂肪瘤,行手术切除。手术中见肿物与肛门外括约肌及皮肤粘连。 Patient, female, 50 years old. One year ago, I found a large mass of broad bean in the perianal cavity and gradually increased painlessly. The physical examination was generally in good condition, and the chest and abdomen organs and laboratory examinations were normal. With chest and knee supine, a mass of 1×2×3 cm was seen at 3 o’clock in the perianal area. Toughness and skin adhesion were not easy to activity without tenderness. There was no abnormality in rectal examination. Clinical diagnosis of perianal lipoma, surgical resection. During the operation, the tumor was adhered to the external anal sphincter and skin.