白斑是一种老年人较常见的口腔黏膜病,是口腔癌前病变之一,其癌变率为5%左右。口腔黏膜白斑在临床上好发于唇、颊、舌、腭等黏膜上,一般无自觉症状,初起时呈乳白色斑块,表面光滑、平或稍高出正常黏膜;如不治疗,以后可逐渐扩大变厚,表面粗糙,界限清楚,明显高出黏膜表面,有的呈皱纸或格子状皲裂、破溃、出血、糜 White spot is a common oral mucosa in the elderly, is one of oral precancerous lesions, the rate of cancer is about 5%. Oral leukoplakia occurs clinically in the lips, cheeks, tongue, palate and other mucosa, the general absence of symptoms, initially milky white plaque, smooth surface, flat or slightly higher than the normal mucosa; if not treated, and later Gradually enlarged and thick, rough surface, clear boundaries, significantly higher than the mucosal surface, and some wrinkled paper or grid-like chapped, ulceration, bleeding, surgeries