A 41-old-male patient with porokeratosis on penis for 10 years developed intensively pruritic erythematous papules on the scrotum and perianal area.

• 患者男性，41岁。阴茎汗孔角化病10年后，在阴囊、肛周出现瘙痒剧烈的红色斑丘疹。