Fig. 1

Abdominal CT scan and Endoscopic findings. a 6.0 mm × 10.4 mm saccular aneurysm was evident in the splenic artery (pancreatic segment of the splenic artery) at the body-tail junction of the pancreas (arrow). The aneurysm was out-pouching from the splenic artery perpendicularly down to the pancreas parenchyma. The aneurysm contacted the pancreatic duct, and the pancreatic duct proximal to the aneurysm was not dilated. However, the distal pancreatic duct was slightly dilated (up to 4.0 mm) (arrow head). The surrounding pancreas, especially distal to the aneurysm, was slightly lower in density after contrast enhancement. This finding suggests swelling. b On admission day 9, esophagogastroduodenoscopy showed active hemorrhage from the major papilla