247 Background: Hemobilia is a life-threatening, although rare event in uPC patient(pt)s. However, there are few reports about it. The purpose of this study was to identify it’s clinical features in uPC at our institute. Methods: Data of 2066 pts who received treatment for uPC between April 2008 and August 2017 were reviewed retrospectively from the electronic medical records. Hemobilia was determined when extravasation was detected from the biliary tree artery on contrast-enhanced computed tomography (CT) or angiography. Blood clot seen in the bile duct on endoscopy was also included. Pts whose bleeding was diagnosed due to tumor invasion of the stomach or duodenum by endoscopy were excluded. CT and angiography were reviewed by an experienced radiologist. Results: Eleven pts developed hemobilia; there were no pts before 2013. All of them received gemcitabine plus nab-paclitaxel (GnP) as first-line chemotherapy. Eight pts developed hemobilia during GnP, three had it after disease progression. Every pt had at least one symptom of Quinke’s triad; upper gastrointestinal hemorrhage (n = 8, 73%), biliary colic (n = 4, 36%), and jaundice (n = 6, 55%). The median time to hemobilia after the start of GnP was 198 days (range: 43-559 days). A covered self-expanding metal stent (cSEMS) was placed in the lower common bile duct in all pts. The median time to bleeding after cSEMS placement was 87 days (range: 30-467 days). Eight pts showed pseudoaneurysm(PA). In 7 of these pts, were diagnosed by CT, the remaining by interventional radiology(IR). IR was employed initially in 6 of the 8 pts, and hemostasis was successful in all. Two pts underwent cSEMS placement and was unsuccessful in both. Of these 2 pts, one underwent IR, with successful hemostasis. Of the remaining 3 pts, 2 pts had hemostasis without treatment, and one had cSEMS placement that was successful for hemostasis. Conclusions: In our study, hemobilia was only seen after 2014. Hemobilia developed after the start of GnP in all of the pts. Pts who showed PA, successful hemostasis was obtained in all cases that underwent IR. Hemobilia should be kept in mind as a cause of upper GI bleeding in uPC pts, especially those with a biliary stent and history of GnP. IR was effective for the management of hemobilia associated with PA.