NATIONAL CANCER INSTITUTE
percutaneous transhepatic cholangiography
(per-kyoo-TAY-nee-us TRANZ-heh-PA-tik koh-lan-jee-AH-gruh-fee)
A procedure to x-ray the hepatic and common bile ducts. A contrasting agent is injected through the skin into the liver or bile duct, and the ducts are then x-rayed to find the point of obstruction. Also called PTC.