Angiography. The right posterior hepatic artery is disrupted at the hepatic hilum (a red arrow), and there is a collateral artery (a yellow arrow) from the right anterior hepatic artery to the right posterior hepatic artery. CHA common hepatic artery, GDA gastroduodenal artery, LHA left hepatic artery, RAHA right posterior hepatic artery, RPHA right posterior hepatic artery