Pancreatic cancer with pseudoaneurysm after duckbill‐shaped anti‐reflux metal stent placement: A case report

A 74‐year‐old man was diagnosed with unresectable pancreatic cancer with obstructive jaundice. Chemotherapy with gemcitabine and nab‐paclitaxel was initiated after placement of a duckbill‐shaped anti‐reflux metal stent (D‐ARMS). A period of 1 month after D‐ARMS placement, the patient developed hematemesis and entered severe shock following emergency admission for further evaluation. Contrast‐enhanced computed tomography revealed a pseudoaneurysm in the gastroduodenal artery, coincident with the site of D‐ARMS placement, and bleeding from the same site was diagnosed. Angiography was performed, and the pseudoaneurysm was successfully treated by transcatheter arterial embolization using coils. The patient was subsequently discharged from hospital and experienced no further bleeding until his death due to an aggravation of the pancreatic cancer after 2 months. We report a case of pancreatic cancer with pseudoaneurysm after D‐ARMS placement.