RAI14 and breast cancer: Following the same analysis, we found that the BC tumor size-induced changes in RAI14 levels was similar to CA15-3 levels (Figure 3(B,C,E,F,H,I)) while there was a strong correlation between the two biomarkers’ levels (r = 0.6014, p < .0001, Figure 2(D)), but not among the CEA and CA125 levels.