NCIt related terms : IVA; Stage IVA Hilar Cholangiocarcinoma;
NCIt definition : Stage IVA includes: Any T, N2, M0. N2: Four or more positive lymph nodes involving
the hilar, cystic duct, common bile duct, hepatic artery, posterior pancreatoduodenal,
and portal vein lymph nodes. M0: No distant metastasis. (AJCC 8th ed.);