Methods Randomly selecting achieved paraffin blocks, including 60 cases of squamous cell carcinoma(SCC), 30 cases of verrucous carcinoma(VC) of oral mucosa and 30 cases of basal cell carcinoma(BCC) of epidermis.

• 方法随机选取具有不同生物学行为的口腔黏膜鳞状细胞癌(SCC)60例、疣状癌(VC)30例和皮肤基底细胞癌(BCC)30例,随访;