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. 2024 Sep 16;12(9):E1065–E1074. doi: 10.1055/a-2366-7302

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The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 2 — Strategy for biliary sector selection for drainage according to Bismuth classification of malignant hilar biliary obstruction. RA; right anterior sector, RP; right posterior sector, L; left sector. a Bismuth I; one stent can drain all three sectors (100%). b Bismuth II: placement of one stent in the right main hepatic duct can drain both RA and RP sectors (60%). c Bismuth IIIa: at least two stents are required to achieve at least 50% of liver volume. d Bismuth IIIb: placement of one stent in the right main hepatic duct can drain both RA and RP sectors (60%). e Bismuth IV: at least two stents are required to achieve at least 50% of liver volume.