Fiberoptic endoscopy designed for duodenal observation and cannulation of VATER'S AMPULLA, in order to visualize the pancreatic and biliary duct system by retrograde injection of contrast media. Endoscopic (Vater) papillotomy (SPHINCTEROTOMY, ENDOSCOPIC) may be performed during this procedure
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Ampulla of Vater -- Pathophysiology : Pathology of the pancreas, gallbladder, extrahepatic biliary tract, and ampullary region / Ernest E. Lack