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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.



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