[Endoscopic interventions of the biliary system].

Endoscopic interventions in the biliary system are defined by the elimination of an outflow obstruction such as in choledocholithiasis or the optimization of bile flow by means of stent drainage. Exclusive use of diagnostic endoscopic retrograde cholangiography (ERC) is now obsolete, but due to its minimally invasive approach, therapeutic ERC is the method of choice for intervention in appropriate indications. If access to the biliary system via the papilla is not possible, approaches as guided by endoscopic ultrasound appear to be a valid option for the experienced endoscopist.