CEACAM5 and colorectal carcinoma: We found that the CEA level in the CRC group (14.27 ± 26μg/L) is significantly higher than that in the CRP group (7.13 ± 7.52μg/L) and the HC group (4.34 ± 4.98μg/L) (P < 0.05, Figure 2(a)).