Intraductal papillary neoplasm of the biliary tract with typical clinicopathological, endoscopic features: A case report

Figure 2 Endoscopic retrograde cholangiopancreatography findings. A: Duodenoscopy revealed an enlarged duodenal papilla, a dilated papillary orifice with a fish-mouth-like appearance and translucent jelly mucus (black arrow); B: Duodenoscopy revealed a large amount of translucent jelly-like mucus containing bile flowing out during bile duct clearance; C: Endoscopic retrograde cholangiography showed multiple cloudy, irregular filling defects in the dilated extrahepatic bile duct (orange arrow), non-visualized dilated left hepatic duct and an intrahepatic cystic lesion caused by mucin obstruction (black arrow); D: Endoscopic retrograde cholangiography showed the morphology and location of the filling defect in the bile duct were altered during clearing of the bile duct (orange arrow).