CXCL8 and neoplasm: High IL-8 expression in combination with CC was an independent predictor of OS (HR, 2.555; 95% CI, 1.042 to 6.261; p = 0.040 for tumor tissues; HR, 3.840; 95% CI, 1.508 to 9.777; p = 0.005 for all serum samples) and DFS (HR, 1.996; 95% CI, 1.088 to 3.954; p = 0.047 for tumor tissues; HR, 1.928; 95% CI, 0.990 to 3.755; p = 0.045 for all serum samples).