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Fig. 15. —68-year-old man with history of T3 N1 M0 pancreatic ductal adenocarcinoma. Pancreatic tumor (thin white arrows) is separated from superior mesenteric vein (V) by normal pancreatic parenchyma (type B relationship). Tumor (thick white arrow) has convex point of contact with superior mesenteric artery (A) in type C relationship. Stent is also seen (black arrow). Given this relationship, tumor involvement of superior mesenteric artery cannot be reliably predicted. At time of surgery, superior mesenteric artery was found not to be involved by tumor.