The GNRI-CEA score was used to further stratify the prognosis of CRC patients; the PFS of patients showed a step-like decrease from the normal group to the severe group (68.99% vs. 57.75% vs. 41.34% vs. 31.36%, p < 0.001) (Figure 1C). Here, CEACAM5 is linked to colorectal carcinoma.