Table 5. The corresponding stage definitions for intrahepatic cholangiocarcinoma from the AJCC 6th edition (2004) and AJCC 7th edition (2010) and AJCC 8th edition (2017).

AJCC staging classification
8th edition (2017)	7th edition (2010)	6th edition (2004)
I	I	I
II	II	II+ III a
III	III + IV a–T4N0M0	III b + III c
IV	IV b	IV

Abbreviations: AJCC, American Joint Committee on Cancer.