CEACAM5 and neoplasm: In univariate analysis, degree of differentiation (95% confidence interval 1.286-9.217, p = 0.014), visceral pleural invasion (95% confidence interval 0.803-8.477, p = 0.111), tumor size (95% confidence interval 2.139-43.756, p = 0.006), pTNM stage (95% confidence interval 0.130-1.372, p = 0.152), postoperative high CYFRA 21-1 level (95% confidence interval 1.432-5.150, p = 0.002), and postoperative high CEA level (95% confidence interval 1.092-4.155, p = 0.026) was found to be significant independent prognostic factor.