Outcome of surgical resection in Klatskin tumors

Table 1 Staging of perihilar cholangiocarcinoma (Green FL 2002)

Tumor, nodes and metastases definitions
Primary tumor
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 ipsilateral branches of the portal vein or hepatic artery
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.
Regional lymph nodes
N0 No regional lymph node metastasis
N1 Regional lymph node metastases
Metastasis
M0 No distant metastasis
M1 Distant metastasis
Stage grouping
Stage 0 Tis, N0, M0
Stage IA T1, N0, M0
Stage IB T2, N0, M0
Stage IIA T3, N0, M0
Stage IIB T1, N1, M0 T2, N1, M0 T3, N1, M0
Stage III T4, any N, M0
Stage IV Any T, any N, M1