Methods: The expression of cyclins dependent kinases (CDK4) in epithelial cells in the samples in 40 cases of OLP and in 10 cases of healthy controls was observed by immunohistochemical method.

• 方法：通过免疫组织化学方法，观察了 40例OLP上皮细胞中 CDK4（细胞周期蛋白依赖性激酶，cyclins dependent kinases）的表达状况。