Biliary obstruction: A blockage in the bile duct system that ... Lumen-apposing metal stent (LAMS): A type of stent used in endoscopic procedures to create a connection between two hollow organs ...

You may have a sample of tissue (biopsy) taken during a PTC. If your bile duct is blocked your doctor may put a drain or stent in so the bile can drain. Your doctor puts a needle through the skin of ...