Fig. 1

Computed tomography scan showed irregular dilatation with meandering in the pancreatic head (single arrow; a) and the early appearance of the portal vein at the arterial phase (double arrows; b). Three-dimensional imaging showed feeders from the superior mesenteric artery (SMA) (arrow heads), celiac artery (single arrow), and splenic artery (double arrows) (c). PV portal vein, CHA common hepatic artery, GDA gastroduodenal artery, SA splenic artery