患者女性,48岁。因发现肛门右侧无痛性肿物1年余入院。专科检查:肛旁左后侧,胸膝位9~10点可见肿物隆起,皮肤表面正常,肿物边界清楚,无压痛,质硬。肛门指诊:肛管上皮及直肠下段黏膜光滑。肛门镜检查未见溃疡、裂口和异常分泌物。行手术局部切除。病理检查巨检:灰红、灰白色已切开肿物1枚,大小4.5 cm×2.6 cm×1.2 cm,切面灰白色,包膜基本完整。镜 Patient female, 48 years old. Because of anal pain, right side found more than 1 year admitted to hospital. Specialist examination: the left side of the perianal, chest knee position 9 to 10 visible mass bulge, the skin surface is normal, clear tumor boundary, no tenderness, hard. Anal fingering: anal epithelial and rectal mucosa smooth. Anorectal examination did not see ulcers, rips and abnormal secretions. Surgical resection. Pathological examination of macroscopic examination: gray red, gray has cut a tumor, the size of 4.5 cm × 2.6 cm × 1.2 cm, gray section, the basic integrity of the envelope. mirror