Primary liver carcinoma of intermediate (hepatocyte-cholangiocyte) phenotype

Haeryoung Kim, Chanil Park, Kwang Hyup Han, Jinsub Choi, Young Bae Kim, Ja Kyung Kim, Young Nyun Park

Research output: Contribution to journalArticle

158 Citations (Scopus)

Abstract

Background/Aims: Recent evidence of hepatic progenitor cells with the bipotential to differentiate into hepatocytes and cholangiocytes gives rise to the suggestion that primary hepatic carcinomas with features intermediate between hepatocellular carcinoma (HCC) and cholangiocarcinoma (CC) may originate from hepatic progenitor cells. Methods: Fifty-four cases of primary liver carcinomas were selected and an immunohistochemical analysis was performed using hepatocytic markers (α-fetoprotein, hepatocyte), cholangiocytic markers (carcinoembryonic antigen, cytokeratin 19) and progenitor cell marker (c-kit). Results: Thirteen cases designated 'intermediate' carcinomas demonstrated strands/trabeculae of small, uniform, round-to-oval cells with scanty cytoplasm and hyperchromatic nuclei embedded within a thick desmoplastic stroma. Six were designated transitional type combined hepatocellular-cholangiocarcinoma (CHC). Ten were named HCC small cell type, demonstrating similar features to typical HCC, but composed of smaller cells. Simultaneous expression of hepatocytic and cholangiocytic markers was demonstrated in 8/13 (61.5%), 4/6 (66.7%), and 3/10 (30%) cases of intermediate carcinomas, transitional CHCs, and HCC small cell type, respectively, and c-kit expression was noted in 10/13 (76.9%), 4/6 (66.7%) and 7/10 (70%) cases, in the same order. Conclusions: Intermediate carcinoma may be a distinct type of primary liver carcinoma, morphologically and phenotypically intermediate between HCC and CC, which originates from transformed hepatic progenitor cells.

Original languageEnglish
Pages (from-to)298-304
Number of pages7
JournalJournal of Hepatology
Volume40
Issue number2
DOIs
Publication statusPublished - 2004 Feb

All Science Journal Classification (ASJC) codes

  • Hepatology

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