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

Drawing shows changes of peripancreatic veins in carcinomatous tumor involvement (Ca) of portosuperior mesenteric vein. When tumor involved portosuperior mesenteric vein, most inferior peripancreatic veins (AI, PI, and IP) were visualized and some were abnormally dilated.