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Bismuth classification for benign biliary strictures
| Bismuth classification | Location |
| I | > 2 cm distal to the hepatic bifurcation |
| II | < 2 cm distal to the hepatic bifurcation |
| III | At the level of the hepatic bifurcation |
| IV | Involves the right or left hepatic duct |
| V | Extends into the left or right hepatic branch ducts |
