口腔白斑是最常见的口腔粘膜病变。它是因粘膜表层过度角化,上皮的透明度减低,粘膜面变成浅白色,故名为白斑。口腔白斑的癌变问题,国内外文献报告甚为悬殊,目前国外文献上观察年限较长的一些报告,大多认为白斑发生癌变者约占5%。国内戴策安(1964)报告白斑100例,其中有2例癌变。白斑患者口腔癌的发病率 Oral leukoplakia is the most common oral mucosal lesion. It is due to hyperkeratosis of the mucosal surface, the transparency of the epithelium is reduced, and the mucous surface becomes pale white, hence the name white spot. The canceration of oral leukoplakia has been widely dissatisfied with the literature reports at home and abroad. At present, some reports on longer-term observations in foreign literature are mostly thought to account for about 5% of the cancerous lesions in leukoplakia. Domestic Dai Cean (1964) reported 100 cases of leukoplakia, including 2 cases of cancer. Occurrence rate of oral cancer in patients with vitiligo