患者,男,63岁。自1978年7月阴茎根部腹侧出现约2cm×1.5cm皮肤粉红色改变,伴瘙痒、渗出。曾按“湿疹”给硼酸溶液外擦后有所好转。1980年3月始局部皮肤及阴毛变白。1990年10月该处又出现三枚直径约4mm大小的丘疹,在外院行激光治疗。近两年局部刺痒,皮损范围无增大。查体:一般情况好,阴茎根 Patient, male, 63 years old. Since July 1978, about 2cm x 1.5cm of pinkish skin has changed on the ventral side of the penis, with itching and exudation. According to “eczema”, the boric acid solution has improved after being rubbed. In March 1980, the local skin and pubic hair turned white. In October 1990, three pimples with a diameter of about 4mm appeared again and were treated with laser in the outer court. Localized itching in the past two years, the range of skin lesions did not increase. Physical examination: generally good, penis root