Endoscopic ultrasound-guided drainage of the biliary system: Techniques, indications and future perspectives.

Over the last decade, endoscopic ultrasound-guided biliary drainage (EUS-BD) has evolved into a widely accepted alternative to the percutaneous approach in cases of biliary obstruction with failed endoscopic retrograde cholangiopancreaticography (ERCP). The available evidence suggests that, in experienced hands, EUS-BD might even replace ERCP as the first-line procedure in specific situations such as malignant distal bile duct obstruction. The aim of this review is to summarize the available data on EUS-BD and propose an evidence-based algorithm clarifies the role of the different EUS-BD techniques in the management of benign and malignant biliary obstructive disease.