Therapeutic Endoscopic Ultrasound in Biliopancreatic Disease.

Therapeutic endoscopic ultrasound (t-EUS) has transformed the management of biliopancreatic diseases by enabling minimally invasive access and intervention through the gastrointestinal wall. This narrative review summarizes current indications and evolving roles of t-EUS in benign and malignant biliary disease, with a focus on the different modalities of transmural drainage, EUS-guided gastroenterostomy (EUS-GE), and EUS-guided radiofrequency ablation (EUS-RFA). In benign settings, EUS-gallbladder drainage (EUS-GBD) has emerged as a minimally invasive alternative to percutaneous cholecystostomy for high-risk patients with acute cholecystitis, offering internal drainage with fewer tube-related adverse events. In malignant biliary obstruction, transmural drainages are consolidated alternatives of endoscopic retrograde cholangiopancreatography (ERCP) as first-line or rescue strategies, providing durable internal biliary drainage, avoiding post-ERCP pancreatitis without deteriorating quality of life. In surgically altered anatomy, t-EUS overcomes the limitations of enteroscopy-assisted ERCP by creating direct access routes to the biliary tree or pancreatic duct. EUS-guided pancreatic duct drainage offers a rescue or primary approach in benign strictures, anastomotic stenosis, and disconnected duct syndrome. EUS-GE has rapidly become a preferred modality for palliation of gastric outlet obstruction in pancreatic cancer, while EUS-RFA provides a platform for locoregional therapy in selected cases of pancreatic neuroendocrine tumors, adenocarcinoma, and pancreatic cystic neoplasms. Collectively, these applications position t-EUS as a central tool in the multidisciplinary management of complex biliopancreatic disease, with ongoing innovations expected to further expand its indications and safety and to refine patient selection and training pathways.