Average CEA levels for pancreatic cancer were higher in the diabetic group (39.23 ng/mL vs. 12.95 in the control group); in the colon cancer group, diabetic patients had a significantly lower rate of CEA, compared with the control group (44.63 ng/mL vs. 288.85 ng/mL—Figure 13). Here, CEACAM5 is linked to malignant colon neoplasm.