For instance, an initial stage IV gastric non-mucinous (0 point) cancer patient presented with liver metastasis (0 point), his or her ECOG score was 2 (43 points), HGB was 80 g/L (45 points), LDH was 534 U/L (71 points), ALB was 35 g/L (53 points), CEA was 6 ng/mL (0 point), and no palliative chemotherapy was administered (50 points). Here, CEACAM5 is linked to cancer.