Biliary neoplasia with extensive intraductal spread associated with liver cirrhosis: a hitherto unreported variant of biliary intraepithelial neoplasia

Shinichi Aishima, Yunosuke Nishihara, Eiji Tsujita, Kenichi Taguchi, Yuji Soejima, Akinobu Taketomi, Yasuharu Ikeda, Yoshihiko Maehara, Masazumi Tsuneyoshi

研究成果: Contribution to journalArticle査読

14 被引用数 (Scopus)

抄録

We describe the histopathologic features of 2 cases of biliary neoplasia with extensive intraductal spread arising in liver cirrhosis. The prevalence of this type of biliary neoplasia may be 0.4% from the review of 468 cases of cirrhotic liver. Histologic analysis revealed that the micropapillary proliferation of the atypical biliary epithelium composed of columnar cells with enlarged nuclei diffusely extended superficially from the septal intrahepatic bile duct to the reactive ductules associated with liver cirrhosis. Both cases exhibited prominent fibrous or sclerotic stroma near the biliary lesion. Immunohistochemical analysis revealed a characteristic cytokeratin and mucin expression pattern (CK7++, CK19++, CK20+, MUC1+/-, MUC2-, MUC5AC+, MUC6-). The tumor cytoplasm was focally positive for laminin γ2 together with linear staining of the basement membrane. Proliferative activity confirmed by Ki67 staining was relatively high. Both patients were disease-free for 3 years after the operation. We believe that the possibility of biliary neoplasia with extensive intraductal spread should be considered to be a variant of biliary intraepithelial neoplasia.

本文言語英語
ページ(範囲)939-947
ページ数9
ジャーナルHuman Pathology
39
6
DOI
出版ステータス出版済み - 6 2008

All Science Journal Classification (ASJC) codes

  • 病理学および法医学

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