Objective To evaluate the significance of proliferating cell nuclear antigen(PCNA)in the histologic differentiation,invasion and metastasis of oral squamous cell carcinomas(OSCC).

• 目的了解增殖细胞核抗原(PCNA)在评估口腔鳞癌组织学分级、肿瘤浸润及转移等生物学特性中的临床意义。