Fig. 1

Contrast-enhanced CT (axial view); a Early phase. b Late phase. Contrast-enhanced CT revealed that the peripheral part had a slightly low density in the early phase and homogeneous isodensity in the late phase. However, the central part revealed a lower density in the early phase and a heterogeneous high density in the late phase. Ao aorta, ASPDA anterosuperior pancreaticoduodenal artery, CBD common bile duct, Du duodenum, GB gall bladder, SMA superior mesenteric artery, SMV superior mesenteric vein, PD pancreatic duct, PV portal vein