CEACAM5 and colorectal carcinoma: CEA [7.5 (95% Cl 1.8–40.9) vs. 1.4 (95% Cl 1.1–2.2)], CA19-9 [16.6 (95% Cl 10.3–105.0) vs. 7.6 (95% Cl 5.1–10.2)], CA 72-4 [4.5 (95% Cl 1.6–19.2) vs. 1.5 (95% Cl 1.5–3.1)], CA 242 [10.3 (95% Cl 4.6–60.4) vs. 4.4 (95% Cl 2.9–8.0)], CA 125 [12.8 (95% Cl 8.9–31.4) vs. 9.9 (95% Cl 8.3–11.7)], and CYFRA 21-1 [2.7 (95% Cl 2.0–5.7) vs. 1.7 (95% Cl 1.5–2.2)] in CRC were significantly different from those in normal healthy subjects (p < 0.001).