复发性阿弗他溃疡(RAU)是常见的口腔黏膜病,其近几年患病率高达20%左右。该病呈周期性复发,间歇期长短不一。早期黏膜上皮细胞内及细胞间水肿,可形成上皮内疱。上皮内及血管周围有密集的淋巴细胞、单核细胞浸润,随后有多形核白细胞、浆细胞浸润,上皮溶解破溃脱落,形成溃疡。溃疡表面有纤维素性渗出物形成假膜或坏死组织覆盖。 Recurrent aphthous ulcer (RAU) is a common oral mucosal disease, its prevalence in recent years as high as 20%. The disease was recurrent, intermittent duration varies. Early mucosal epithelial cells and intraepithelial edema, the formation of intraepithelial blisters. Epithelial and peripheral vascular dense lymphocytes, mononuclear cells infiltration, followed by polymorphonuclear leukocytes, plasma cell infiltration, epithelial dissolution ulceration, the formation of ulcers. Cellulite exudate ulcer surface formation of pseudomembranous or necrotic tissue coverage.