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Extrahepatic Bile Duct

EXTRAHEPATIC BILE DUCT 
T: primary tumor
TXPrimary tumor cannot be assessed
T0No evidence of primary tumor
TisCarcinoma in situ
T1Tumor invades bile duct wall to a depth less than 5 mm
T2Tumor invades bile duct wall to a depth of 5 mm up to 12 mm
T3Tumor invades bile duct wall to a depth of more than 12 mm
T4Tumor involves the celiac axis, the superior mesenteric artery or the common hepatic artery
N: regional lymph nodes
NXRegional lymph nodes cannot be assessed
N0No regional lymph node metastasis
N1Metastasis in 1?3 regional lymph nodes
N2Metastasis in 4 or more regional lymph nodes
M: distant metastasis
M0No distant metastasis
M1Distant metastasis
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