NCIt related terms : Stage IIA Gallbladder Cancer;
NCIt definition : Stage IIA includes: T2a, N0, M0. T2a: Tumor invading the perimuscular connective tissue
on the peritoneal side, without involvement of the serosa (visceral peritoneum). N0:
No regional lymph node metastasis. M0: No distant metastasis. (AJCC 8th ed.);