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WHO Classification of Tumours
Focal nodular hyperplasia (FNH)
Liver and intrahepatic bile ducts


Focal nodular hyperplasia (FNH) is not a true neoplasm, but a regenerative hyperplastic response of hepatocytes, secondary to localized vascular abnormalities
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Wanless IR, Mawdsley C, Adams R (1985)
On the pathogenesis of focal nodular hyperplasia of the liver.
Hepatology 5: 1194-200

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Bosman FT, Carneiro F, Hruban RH, Theise ND (Eds.)
WHO Classification of Tumours of the Digestive System.
4th Edition
International Agency for Research on Cancer: Lyon 2010