label: Stage IVA Hilar Cholangiocarcinoma AJCC v7
label_lc: stage iva hilar cholangiocarcinoma ajcc v7
description: Stage IVA includes: T4, N0-1, M0. T4: Tumor invades the main portal vein or its branches bilaterally; or the common hepatic artery; or the second-order biliary radicals bilaterally; or unilateral second-order biliary radicals with contralateral portal vein or hepatic artery involvement.  N0: No regional lymph node metastasis.  N1: Regional lymph node metastasis (including nodes along the cystic duct, common bile duct, hepatic artery, and portal vein).  M0: No distant metastasis.  (from AJCC 7th Ed.)