例1 男性,26岁。因脱发二月来诊。患者发现近二月来头部出现散在脱发斑,按斑秃治疗无效。皮肤检查:后枕部及两颗部散在黄豆至小指甲大小之脱发斑,边界不清,有的融合呈虫蚀状,脱发区头皮正常。全身皮肤未见皮疹,口腔、外阴及肛周粘膜正常。肘、颈、腋窝、腹股沟淋巴结可触及。患者平时无明显自觉不适, Example 1 male, 26 years old. Due to hair loss in February. Patients found scattered head hair lesions in recent months, according to the treatment of alopecia areata invalid. Skin examination: After the occipital and two scattered in soybeans to small fingernail hair loss spots, the boundary is unclear, and some were worm-eaten fusion, hair loss area normal scalp. No skin rash, oral, vulvar and perianal mucosal normal. Elbow, neck, armpit, inguinal lymph nodes can be touched. Patients usually no obvious self-conscious discomfort,