Objective:To determine the variation in levels of expression of p16, p21ras and critical stages in cutaneous basal cell carcinoma(BCC) ,squamous cell carcinoma(SCC) and seborrheic kerato-sis (SK) .

• 目的:探讨细胞周期依赖性激酶抑制蛋白、癌基因蛋白和细胞增殖指数在皮肤基底细胞癌(BBC)、鳞状细胞癌(SCC)和脂溢性角化病(SK)中的表达,并就其结果进行分析。