扁平苔癣(LP)是一种常见的口腔粘膜和皮肤的表浅的非感染性炎症,于1869年由Eramus Wilson医生第1次作为一种真正的疾病报道,迄今已有100多年,但病因仍不清楚。过去认为与精神因素、药物过敏、病毒感染及内分泌紊乱等有密切关系。近年来,有人认为与自身免疫有关。关于LP免疫方面的研究,国内外也有文献报道,认为LP患者可能育体液免疫失调和一般的免疫功能紊乱。但关于LP的发病是否与局部免疫功能有关,却未见报道。分泌型IgA是外分泌物中最主要的免 Lichen planus (LP), a common form of superficial non-infectious inflammation of the oral mucosa and skin, was first reported as a true disease by Dr. Eramus Wilson in 1869, for more than 100 years now, but the cause Still not clear. In the past that with the mental factors, drug allergies, viral infections and endocrine disorders are closely related. In recent years, some people think it is related to autoimmunity. On the LP immune research, both at home and abroad have also reported in the literature that patients with LP may be bodily fluid immune disorders and general immune dysfunction. However, whether the incidence of LP and local immune function, but no reports. Secretory IgA is the most important exocrine free