Overexpression of ecotropic viral integration site-1 is a prognostic factor of lung squamous cell cancer

AIM: To explore the expression and clinical significance of ecotropic viral integration site-1 (EVI1) of lung squamous cell cancer (SCC). METHODS: The expression of EVI1 in SCC was detected by immunohistochemistry and the validation cohort was divided into EVI1 high-expression group and low-expression group according to the cutoff of immunohistochemical score. The correlations between EVI1 expression and the clinicopathological factors were analyzed by χ(2) test. The relation between EVI1 expression and overall survival rate was evaluated by univariate analysis with Kaplan–Meier method. The independent prognostic factor was identified by multivariate analysis with Cox regression model. RESULTS: In this study, the EVI1 high-expression percentage was 32.32% (53/164). EVI1 high expression was significantly associated with a poorer overall 5-year survival rate of SCC (P=0.021). Moreover, EVI1 high expression was identified as an independent prognostic factor of SCC, predicting the unfavorable prognosis (P=0.013). CONCLUSION: High expression of EVI1 was significantly associated with a poorer prognosis and it was identified as an independent prognostic factor of SCC.