Table 1.

Criteria for non-resectability of hilar cholangiocarcinoma

Bilateral hepatic duct involvement up to the secondary biliary radicles (Bismuth type IV)

Encasement or occlusion of the main portal vein (relative)

Unilateral tumor extension to secondary biliary radicles (Bismuth type III) with contralateral portal vein or hepatic artery involvement or encasement

Hepatic lobar atrophy with contralateral portal vein or hepatic artery involvement or encasement

Hepatic lobar atrophy with contralateral tumor extension to the secondary biliary radicles

Available from Aljiffry et al^[6].