The Effect of Benign and Malignant Liver Disease on the Tumour Markers CA19-9 and CEA

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Abstract
The serum concentrations of CA19-9 and carcinoembryonic antigen (CEA) were measured in 150 consecutive patients with histologically proven liver disease admitted to a liver unit for transplant assessment. A significant proportion of the cases studied had a CA19-9 above the upper limit of the reference range (35 kU/L): alcoholic liver disease (73%), primary sclerosing cholangitis (61%), primary biliary cirrhosis (60%), chronic hepatitis B (71%), chronic hepatitis C (84%), autoimmune hepatitis (36%) and hepatocellular carcinoma (54%). CEA was only elevated in a small proportion of the patients with benign liver disease and the degree of elevation was small (15-37 μg/L). Significantly raised CEA was observed in two patients (15%) with hepatocellular carcinoma. Statistically significant correlations were observed between the serum CA19-9 concentration and standard parameters of liver dysfunction: positive correlations with aspartate aminotransferase, alkaline phosphatase and bilirubin and negative correlations with albumin and γ-glutamyltransferase. Positive relationships were also observed between CA19-9 and both CEA and creatinine. Both increased production of CA19-9 from biliary epithelial cells and decreased clearance due to cholestasis may be contributing to the elevation of CA19-9 in the bloodstream. Our data indicate that caution is needed in the interpretation of CA19-9 results in the presence of liver dysfunction.