患者女,40岁。肛周新生物半个月。患者半个月前无意中发现肛周有一新生物,无症状,无破溃、出血,自觉渐增大,未予特殊处理,于2013年1月23日就诊于我科门诊。既往体健,家族成员中无类似疾病者。体格检查:一般状况良好,系统检查未见异常。皮肤科检查:肛周2点钟处一黄豆大新生物,囊样外观(图1A),光滑坚实,无压痛。皮损组织病理检查:表皮正常,真皮内见一个界限清楚结节,呈囊实性,与其上 Female patient, 40 years old. Perianal new creatures for half a month. Patients a half months ago inadvertently found a perineal new biological, asymptomatic, no ulceration, bleeding, consciously increased, without special treatment, in January 23, 2013 treatment in our clinic. Past physical health, family members no similar diseases. Physical examination: the general condition is good, the system check no abnormalities. Dermatology examination: Perianal at 2 o’clock a big new creatures, cystic appearance (Figure 1A), smooth and solid, no tenderness. Skin lesions histological examination: the normal epidermis, dermis see a clear boundary nodules, was cystic solid, and its