Table 2.

TNM staging for hilar cholangiocarcinoma: anatomic stage/prognostic groups.

Stage	Primary tumor	Regional lymph nodes	Distant metastasis
Stage 0	Tis	N0	M0
Stage I	T1	N0	M0
Stage II	T2a–b	N0	M0
Stage IIIA	T3	N0	M0
Stage IIIB	T1–3	N1	M0
Stage IVA	T4	N0–1	M0
Stage IVB	Any T	N2	M0
	Any T	Any N	M1

For definitions of the different stages please see Box 1.

Reproduced with permission from [61] © Springer (2010).