[Expressions of cyclin D1 and p16 in hypopharyngeal squamous cell carcinoma and their clinical significance]

To study the expressions of Cyclin D1 and p16 proteins in hypopharyngeal squamous cell carcinoma and their clinical significance.Immunohistochemical technology (P-V) was applied to detect the expression of Cyclin D1 and p16 in 36 cases of hypopharyngeal squamous cell carcinoma and 10 cases of normal epithelium.(1) The expression of cyclin D1 in the tumorous cell was significantly higher than that in normal epithelium (P0.05). The expression of p16 in the tumorous cell was significantly lower than that in normal epithelium (P0.05); (2) The positive rate of Cyclin D1 was significantly correlated with clinical stage and cervical lymph node metastases (P0.05). The positive rate of p16 was correlated with cervical lymph node metastases (P0.05). The positive rates of Cyclin D1 and p16 were not correlated with the gender, age, tumor size, primary lesion and cell differentiation (P0.05); (3) There was correlation between the expression of Cyclin D1 and the expression of p16 (r(s) = -0.420, P0.05).The over-expression of Cyclin D1 and the under-expression of p16 may play a significant role in the occurrence incidence and development of hypopharyngeal squamous cell carcinoma, and may be important indicators for cervical lymph node metastases.