[A Case of Choledochoduodenal Fistula and Ruptured Gastroduodenal Arterial Pseudoaneurysm with Penetration to the Duodenum in Invasive Pancreatic Cancer].

The patient was a 76-year-old woman who was referred to our department for jaundice. From further evaluation, resectable cancer of the pancreas head was diagnosed. The patient did not want to undergo surgery, although it had been planned. Thus, we performed biliary stenting and subsequently applied chemoradiotherapy. Then, the patient underwent the best supportive care(BSC). Eleven months after the diagnosis of the pancreatic cancer, she presented with hematemesis while in the hospital for a lumbar compression fracture, and her vital signs showed that she was in shock. Emergency endoscopic examination of the upper gastrointestinal tract revealed bleeding from the duodenal bulb. Endoscopic hemostasis was difficult; therefore, emergency interventional radiology(IVR)was conducted. Owing to the ruptured gastrointestinal pseudoaneurysm in the duodenum, embolization was performed. The 2nd-look endoscopic examination of the upper gastrointestinal tract showed that the biliary stent was exposed to the duodenal bulb, which led to the formation of a choledochoduodenal fistula. As the subsequent course, the patient received conservative treatment and had no onset of retrograde choledochitis; however, the patient died due to the original cancer 15 months after the diagnosis and 4 months after the bleeding.