NCIt related terms : IIA; Stage IIA Extrahepatic (Distal) Bile Duct Cancer;
NCIt definition : Stage IIA includes: (T1, N1, M0); (T2, N0, M0). T1: Tumor invading the bile duct wall
with a depth less than 5 mm. T2: Tumor invading the bile duct wall with a depth of
5-12 mm. N0: No regional lymph node metastasis. N1: Metastasis in one to three regional
lymph nodes. M0: No distant metastasis. (AJCC 8th ed.);