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Nomenclature of the finer branches of the biliary tree: Canals, ductules, and ductular reactions in human livers

Roskams, T.A., Theise, N.D., Balabaud, C., Bhagat, G., Bhathal, P.S., Bioulac-Sage, P., Brunt, E.M., Crawford, J.M., Crosby, H.A., Desmet, V., Finegold, M.J., Geller, S.A., Gouw, A.S.H., Hytiroglou, P., Knisely, A.S., Kojiro, M., Lefkowitch, J.H., Nakanuma, Y., Olynyk, J.K., Nyun Park, Y., Portmann, B., Saxena, R., Scheuer, P.J., Strain, A.J., Thung, S.N., Wanless, I.R. and West, A.B. (2004) Nomenclature of the finer branches of the biliary tree: Canals, ductules, and ductular reactions in human livers. Hepatology, 39 (6). pp. 1739-1745.

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The work of liver stem cell biologists, largely carried out in rodent models, has now started to manifest in human investigations and applications. We can now recognize complex regenerative processes in tissue specimens that had only been suspected for decades, but we also struggle to describe what we see in human tissues in a way that takes into account the findings from the animal investigations, using a language derived from species not, in fact, so much like our own. This international group of liver pathologists and hepatologists, most of whom are actively engaged in both clinical work and scientific research, seeks to arrive at a consensus on nomenclature for normal human livers and human reactive lesions that can facilitate more rapid advancement of our field. (HEPATOLOGY 2004; 39:1739–1745.)

The fine detail of normal liver microanatomy is not well understood.1, 2 This is true whether discussing hepatic vasculature, bile ducts, stroma and matrix, innervation, or lymphatics. Some points are known, but gaps remain. The distal branches of the biliary tree are reasonably well defined: the common bile duct arises from confluence of the right and left hepatic ducts, which arise from segmental ducts, which arise from septal ducts arising from interlobular ducts.3 It is known that these interlobular ducts arise from still smaller cholangiocyte-lined structures and that the lumina of these in turn are in structural continuity with the lumen of hepatocellular bile canaliculi. But the terms used for these smallest, most proximal structures have been confusing.

Item Type: Journal Article
Publisher: John Wiley & Sons Inc.
Copyright: © 2004 American Association for the Study of Liver Diseases
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