Fig. 2

Emergency angiography findings: left-anterior oblique 20-degree images of superior mesenteric arteriography. a The hepatic and splenic arteries were viewed via the pancreaticoduodenal arcade, and the routes from the anterior and posterior inferior pancreaticoduodenal arteries (AIPDA and PIPDA) to the anterior and posterior superior pancreaticoduodenal arteries (ASPDA and PSPDA) were observed. No extravasation was present. A pseudoaneurysm (white asterisk) was visualized via the branch of the AIPDA (white arrowhead). The arcade from the PIPDA to the PSPDA was not involved in the pseudoaneurysm. b The portal vein was subsequently visualized from the pseudoaneurysm through the arterioportal fistula (APF). c Same image as a). The trace of the microcatheter advanced via the AIPDA is shown by the red line. d Same image as b). A balloon catheter was advanced to the hepatic side of the APF using a percutaneous transhepatic portal approach, and the microcatheter was advanced through the balloon catheter to the pseudoaneurysm (blue line). The position of the balloon is indicated by a black arrowhead