CEACAM5 and colorectal carcinoma: In non-anemic CRC patients, several correlations between iron-related serum biomarkers and hormonal markers or CEA were detected, although only a few reached statistical significance: in males, iron correlated with the tumor size (ρ = −0.57, p = 0.020), while transferrin correlated with the pT stage (ρ = −0.524, p = 0.045).