Advances in diagnosis, treatment and palliation of cholangiocarcinoma: 1990-2009

Table 5 AJCC staging of ECC

Stage	Tumor	Node	Metastasis
0	Tis	N0	M0
IA	T1	N0	M0
IB	T2	N0	M0
IIA	T3	N0	M0
IIB	T1-T3	N1	M0
III	T4	Any N	M0
IV	Any T	Any N	M1

Tis: Carcinoma in situ; T1: Tumor confined to the bile duct histologically; T2: Tumor invades beyond the wall of the bile duct; T3: Tumor invades the liver, gallbladder, pancreas, and/or unilateral branches of the portal vein (right or left) or hepatic artery (right or left); T4: Tumor invades any of the following: main portal vein or its branches bilaterally, common hepatic artery, or other adjacent structures, such as the colon, stomach, duodenum, or abdominal wall; N0: No regional lymph node metastasis; N1: Regional lymph node metastasis; M0: No distant metastasis; M1: Distant metastasis.