Stage IIIB includes: (T4, N0, M0); (T4, N1, M0); (T4, N2, M0). T4: Tumor involving the celiac axis, superior mesenteric artery, and/or common hepatic artery. N0: No regional lymph node metastasis. N1: Metastasis in one to three regional lymph nodes. N2: Metastasis in four or more regional lymph nodes. M0: No distant metastasis. (AJCC 8th ed.) [from NCI]