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Molecular classification of hepatocellular adenoma: A single-center experience
Ann Hepatobiliary Pancreat Surg 2019 May;23(2):109-14
Published online May 31, 2019;  https://doi.org/10.14701/ahbps.2019.23.2.109
Copyright © 2019 Korean Association of Hepato-Biliary-Pancreatic Surgery.

Xue-Yin Shen1, Xu-Guang Hu2, Young-Bae Kim3, Mi-Na Kim1, Sung-Yeon Hong1, Bong-Wan Kim1, Hee-Jung Wang1 

1Division of Hepatobiliary Surgery and Liver Transplantation, Department of Surgery, Ajou University School of Medicine, Suwon, 2Department of Hepatobiliary Surgery, Jiangxi Cancer Center, Nanchang, China, 3Department of Pathology, Ajou University School of Medicine, Suwon, Korea
Received December 26, 2018; Revised January 21, 2019; Accepted January 30, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Backgrounds/Aims: Hepatocellular adenoma (HCA) is a rare benign tumor that has a risk of malignant transformation into hepatocellular carcinoma (HCC) and bleeding. The aim of this study was to analyze the characteristics of HCA by performing molecular classification.
Methods: We retrospectively collected data from nine patients who were diagnosed with HCA from 1995 to 2016. The patients underwent liver surgery due to the existence of clinical symptoms. Immunohistochemical (IHC) staining was performed to classify the subgroups of HCA.
Results:Four patients with both β-catenin and inflammation were classified as β-IHCA. Two patients were defined as β-HCA. Two patients were classified as HHCA. Only one patient was defined as IHCA. None of the patients had unclassified HCA. Seven of nine patients had a malignant transformation. By comparing the characteristics of HCA between two groups, we found the mean tumor size in the malignant transformation group was greater than the non-malignant transformation group.
Conclusions: Taken together, the mean tumor size and activation of catenin β1 mutation status might be the risk factors for the malignant transformation of HCA into HCC. Moreover, IHCA without the catenin β1 mutation could also have a possibility of malignant transformation into HCC.
Keywords : Adenoma; Liver Cell; Molecular pathology; Subtype; Carcinoma; Hepatocellular

 

November 2019, 23 (4)