Medical Electron Microscopy

, Volume 33, Issue 2, pp 57–63 | Cite as

Hepatoid adenocarcinoma: a new clinicopathological entity and the hypotheses on carcinogenesis

  • T. Kishimoto
  • Yuichiro Nagai
  • Kazuki Kato
  • D. Ozaki
  • Hiroshi Ishikura
REVIEW

Abstract

Hepatoid adenocarcinoma is reviewed in its clinicopathological and oncogenetic aspects. This variant of adenocarcinoma has been found to be an alpha-fetoprotein (AFP) -producing carcinoma arising in extrahepatic organs, and it mimics hepatocellular carcinoma in terms of morphology and function. Vascular invasion, usually prominent, is often complicated by extensive liver metastases. A prompt and accurate diagnosis of hepatoid adenocarcinoma is important because the prognosis is very poor compared with that of common types of adenocarcinoma. The characteristic features of hepatoid adenocarcinoma are summarized on the basis of our own experiences and the literature. In addition, a possible molecular mechanism that under-lies the ectopic appearance of the hepatic phenotype is discussed.

Key words Hepatoid adenocarcinoma Alpha-fetoprotein Clinicopathology 

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Copyright information

© The Clinical Electron Microscopy Society of Japan 2000

Authors and Affiliations

  • T. Kishimoto
    • 1
  • Yuichiro Nagai
    • 1
  • Kazuki Kato
    • 1
  • D. Ozaki
    • 1
  • Hiroshi Ishikura
    • 1
  1. 1.Department of Pathology, Chiba University, School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan Tel. +81-43-226-2061; Fax +81-43-226-2063 e-mail: tkishi@med.m.chiba-u.ac.jpJP

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