CEACAM5 and breast fibrocystic disease: In the subgroup of patients with benign breast diseases, very good correlations were found for CEA (R = 0.89), CA 15-3 (R = 0.84), CA 125 (R = 0.87), and AFP (R = 0.94), respectively, while the correlations were worse for CA 19-9 (R = 0.52).