Table 1.
Stage | Criteria |
T1 | Tumor involving biliary confluence ± unilateral extension to second-order biliary radicals |
T2 | T1 ± ipsilateral portal vein involvement ± ipsilateral hepatic lobar atrophy |
T3 | Tumor involving biliary confluence + bilateral extension to second-order biliary radicals; or unilateral extension to second-order biliary radicals with contralateral portal vein involvement; or unilateral extension to second-order radicals with contralateral hepatic lobar atrophy; or main or bilateral portal vein involvement |