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Fig. 4A —Variation in origin of common hepatic artery. Common hepatic artery originates from superior mesenteric artery (SMA) in 62-year-old man. Volume-rendered 3D image created from axial contrast-enhanced CT data reveals common hepatic artery (small open arrow) originates from SMA (large solid arrow). Gastroduodenal artery (large open arrow) originates from common hepatic artery. Note accessory left hepatic artery (small solid arrow) originating from left gastric artery.