sGal-9 levels were able to discriminate between HDs and patients with GC/GEJ (area under the curve [AUC] 0.694), whereas the other markers showed the same or inferior capabilities of discrimination (AUC for CEA: 0.6; CA72-4: 0.705; and CA19-9: 0.604; Figure 2E). Here, CEACAM5 is linked to gastric cancer.