PMID: 7545644Sep 1, 1995Paper

Combined hepatocellular and cholangiocarcinoma: proposed criteria according to cytokeratin expression and analysis of clinicopathologic features

Human Pathology
T MaedaMasazumi Tsuneyoshi

Abstract

We herein evaluated 36 cases of combined hepatocellular and cholangiocarcinoma (cHCC-CC) (including 29 surgically resected and seven autopsy cases) by the immunohistochemical methods of anticytokeratin antibodies 7 and 19, and then analyzed the clinicopathologic features by comparing cHCC-CC with ordinary hepatocellular carcinoma (HCC) and cholangiocarcinoma (CC). The results indicated that even if mucin production could not be confirmed, nine cases with HCC areas that showed a histological resemblance to CC also showed immunohistological biliary differentiation. Therefore, we advocate that these HCC with biliary differentiation based on an immunohistochemical analysis should thus be included in the criteria of cHCC-CC in broad terms. Regardless of the extent of mucin production, the cHCC-CCs as indicated by an immunohistochemical analysis are considered to have a similar background to that of ordinary HCCs regarding such factors as the average age, male:female ratio, hepatitis B surface antigen (HBsAg) and hepatitis C virus antibody (HCVAb) positivity, alpha-fetoprotein level, and the presence of cirrhosis. However, cHCC-CCs tend to metastasize to many organs and the lymph nodes, and, as a result, have a poor prognosis.

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