JPS Classification of the regional lymph nodes of the pancreas. (Adapted from Nagakawa T, Kobayashi H, Ueno K, Ohta T, Kayahara M, Mori K, Nakano T, Takeda T, Konishi I, Miyazaki I: The pattern of lymph node involvement in carcinoma of the head of the pancreas. A histologic study of the surgical findings in patients undergoing extensive nodal dissections. Int J Pancreatol. 1993,13:15-22 . Used with permission from Springer Science+Business.) Insert: Subdivision of Group 14: (AMS) superior mesenteric artery; (AJ) jejunal artery; (APDI) inferior pancreaticoduodenal artery; (ACM) medial colic artery; For other abbreviations of the nodal groups refer to Table 2.