OLFM4 and neoplasm: Larger tumor size (OR, 2.500; 95% confidence interval (CI), 0.988–6.327), poor differentiation (OR, 2.748; 95% CI, 1.029–7.340), intravascular tumor thrombi (OR, 4.167; 95% CI, 1.202–14.442) and reduced OLFM4 expression (OR, 6.275; 95% CI, 2.345–16.791) were identified as risk factors that might affect the LNM of EGC (Table 3).