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Fig. 5A. —Illustrations show CT findings of normal anatomy of peripancreatic veins and features in tumor invasion of peripancreatic tissues.

Drawing shows CT findings of normal anatomy of peripancreatic veins and second portion of extrapancreatic nerve plexus. Paired pancreaticoduodenal venous arcades, anterior arcade—anterosuperior pancreaticoduodenal vein (AS) and anteroinferior pancreaticoduodenal vein (AI)—and posterior arcade—posterosuperior pancreaticoduodenal vein (PS) and posteroinferior pancreaticoduodenal vein (PI)—lie directly on surface of pancreatic head. Inferior pancreaticoduodenal vein (IP) and first jejunal trunk (JT) run behind superior mesenteric artery (SMA). Note area of small circles representing extrapancreatic nerve plexus. RCV = right superior colic vein, RGE = right gastroepiploic vein, GT = gastrocolic trunk, SMV = superior mesenteric vein, Panc. = pancreas.

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