Endoscopic ultrasound: an upper or decrease endoscopy with an ultrasound wand connected to the endoscope, which allows to visualize your biliary system. These organs consist of the liver and bile ducts, but a gastroenterologist is also qualified to diagnose and take care of situations that have an effect on the: https://www.directivepublications.org/journal-of-gastroenterology-hepatology-and-endoscopy-research/