Significant correlations between CEACAM1 expression and BLBC stage (I-II vs III-IV), N-stage (N1-N2 vs N3-N4), and tumor status (tumor absence vs presence) (p = 0.001, 0.000, < 0.0001, respectively) (Figure 2A) were obtained by univariate cox regression analysis. Here, CEACAM1 is linked to neoplasm.