Significance of survivin expression: Prognostic value and survival in stage III non-small cell lung cancer.

This study was designed to determine the levels of survivin expression and identify its clinical significance as a prognostic factor for stage III non-small cell lung cancer (NSCLC). A total of 210 cases of stage III NSCLC were collected and the expression levels of survivin and vascular endothelial growth factor A (VEGF-A) in tumor tissues were investigated using immunohistochemistry (IHC). The medical records of the patients were reviewed to determine the association with clinical course. Of the 210 NSCLC tissues, 112 (53.3%) cases demonstrated positive expression of survivin protein. Coexpression of survivin and VEGF-A was identified. The 5-year survival rate of patients with positive survivin expression was significantly lower compared with the survivin-negative cancer patients (P<0.05). The expression of survivin in NSCLC correlated with tumor size. Survivin and VEGF-A were independent prognostic factors of stage III NSCLC. Survivin protein is a valuable marker of prognosis in stage III NSCLC patients.