１　病例资料【例１】　男，７２岁。２年前阴囊瘙痒性红斑，搔挠后形成糜烂面，面积逐渐扩大，并累及股内侧皮肤，多家医院按湿疹、股癣治疗无好转。查体：系统检查无异常。皮肤科情况：阴囊右侧及股内侧皮肤有１０ｃｍ×１２ｃｍ大小红斑，表面有污秽褐色结痂，基底炎症显著? 1 Case data [Example 1] Male, 72 years old. Two years ago, itchy erythema of the scrotum, the formation of erosion surface after scratching, the area gradually expanded, and involving the inner skin of the femoral area. There was no improvement in the treatment of eczema and femoral hernia in many hospitals. Physical examination: There is no abnormality in the system check. Dermatology: 10 cm x 12 cm erythema on the right side of the scrotum and the inner skin of the femoral body. The surface has a brownish scab stain. The basal inflammation is significant.