CEACAM5 and cancer: p = 0.009) and CEA (1.67 vs. 1.46 ng/mL; p = 0.797) as well as CRP (16.4 vs. 1.05 mg/L; p < 0.001) were higher in the cancer group than in healthy volunteers, but only in the case of CEA was the difference not statistically significant (Table 2).