Fig. 1

Contrast-enhanced CT revealed a hypovascular mass in the uncus of the pancreas, suspected of pancreatic cancer (encircled by a white dotted line) (a). Main pancreatic duct was dilated, 13 mm in size and multiple cystic lesions were also seen, indicating mixed-type IPMN (arrowhead) (b). Endoscopic ultrasonography revealed a hypoechoic mass in the uncus of the pancreas (arrowhead) (c) and dilatation of the main (M) and branch (B) pancreatic ducts (d) with mural nodule, 4.6 mm in size (encircled by a white dotted line) (e). Preoperative 3D-CT. The DPA originated from the proximal SpA (f). IPMN intraductal papillary mucinous neoplasm, DPA dorsal pancreatic artery, SpA splenic artery, CHA common hepatic artery