Serum miR-195, miR-181a, and miR-30a are also downregulated in BC, and their diagnostic accuracy in all-stage and early-stage BC showed sensitivity values (59%–70.7% for miR-181a; 74% for miR-30a; 68%–69% for miR-195) higher than those of common BC diagnostic markers CEA and CA153 (sensitivity: 8.4%–15.0% for CEA, 10.5%–21.0% for CA153) [161,162,163]. Here, CEACAM5 is linked to breast cancer.