[A study on P16 and HPV16 in sinonasal squamous cell carcinoma].

Objective: The aim of this study is to evaluate the relationship between the expression of P16 and infection of HPV16 in sinonasal squamous cell carcinoma and its clinical and pathological features, futher prognosis was also investigated. Method: Fifty-five cases of sinonasal squamous cell carcinoma were collected,twenty cases of nasal in-verted papilloma and twenty cases of nasal polyp were chose as control. The expression of P16 and infection of HPV16 were detected by immunohistochemistry in both experimental group and control group. Result: The positive rate of P16 and HPV16 in sinonasal squamous cell carcinoma and nasal in-verted papilloma were significantly higher than it in nasal polyp ( P <0.05 or P <0.01). The expression of P16 was correlated with tumor differentiation and clinical TNM stages ( P <0.05), but was not associated with age, sex, smoking and the primary tumor site ( P >0.05). HPV16 infection has no statistical relationship with analysis factors ( P >0.05). There was a positive correlation between P16 expression an HPV16 infection in the cases of sinonasal squamous cell carcinoma ( r =0.483, P <0.01). Survival curves showed that the expression of P16 and infection of HPV16 were positively associated with prognosis of sinonasal squamous cell carcinoma, Log Rank test showed a significant difference ( P <0.05). Conclusion: The abnormal expression of P16 and HPV16 infection play an important role in the development of sinonasal squamous cell carcinoma. The two may had a synergistic effect. P16/HPV16 positive cases had better prognosis.