患者男,40岁,司机。10年前无任何诱因,感阴囊发痒,出现大小不等丘疹,逐年增多,多次以激光治疗,数月后,又生新的丘疹。近2月来,丘疹明显增多,并延及到肛周,瘙痒难忍。体检:一般情况良好,系统检查未见异常。皮肤科情况:阴囊及阴茎皮肤有多数散在绿豆大肉色及浅褐色丘疹,表面光滑 Male patient, 40 years old, driver. 10 years ago without any incentives, itchy sense of the scrotum, papules appear in different sizes, increasing year by year, laser treatment, several months later, a new papules. The past two months, the pimples increased significantly, and extended to the perianal, itching unbearable. Physical examination: the general situation is good, the system check no abnormalities. Dermatology: Scrotum and penis skin are scattered in the majority of mung bean big color and light brown papules, smooth surface