CEACAM5 and neoplasm: Based on univariate analysis, age (p = 0.001), tumor location (P = 0.033), preoperative CEA level (P = 0.043), preoperative CA19–9 level (P = 0.006), pathological T stage (p = 0.008), N stage (P<0.001), lymphovascular invasion (P<0.001) and postoperative complications (P = 0.003) were revealed as significant predictors of OS (Table 3).