CEACAM5 and colorectal carcinoma: The comparison of the concentration in terms of CEA, CA125, and CA19-9 were all higher than controls in CRC patients (both in non-OCRC and OCRC patients, all P < 0.05; Figures 1B–D); however, the comparison had no significant difference between non-OCRC and OCRC groups (Supplementary Table 1).