"Intrahepatic bile ducts "
"The left and right hepatic ducts unite to form the common hepatic duct (CHD). Bile duct(s) from segment 1 (caudate lobe) drain into the angle of this union."
"By convention the biliary tree is divided into intra- and extra-hepatic bile ducts 1. There is significant variation in the anatomy of the biliary tree with the classical description below thought to be present in ~60% of the population 2."
"Bile canaliculi unite to form segmental bile ducts which drain each liver segment. The segmental ducts then combine to form sectoral ducts with the following pattern 5:"
"segments 6 and 7: right posterior sectoral duct (RPSD), coursing more horizontally"
"segments 5 and 8: right anterior sectoral duct (RASD), coursing more vertically"
"right posterior and anterior sectoral ducts unite to form the right hepatic duct (RHD)"
"segmental bile ducts from 2, 3, 4a and 4b unite to form the left hepatic duct (LHD)"
"The left and right hepatic ducts unite to form the common hepatic duct (CHD). Bile duct(s) from segment 1 (caudate lobe) drain into the angle of this union."
"right posterior sectoral duct draining into LHD ~15% (range 13-19%)"
Expected headings
"Intrahepatic bile ducts "
"Extrahepatic bile ducts"
"Intrahepatic bile ducts"
"Extrahepatic bile ducts"
"By convention the biliary tree is divided into intra- and extra-hepatic bile ducts 1. There is significant variation in the anatomy of the biliary tree with the classical description below thought to be present in ~60% of the population 2."
"segmental bile ducts from 2, 3, 4a and 4b unite to form the left hepatic duct (LHD)"
""triple confluence": union of RPSD, RASD and LHD to form CHD ~11%"
"The ducts of the left hepatic lobe are more anterior than those of the right lobe; it is important particularly when contrast cholangiogram is performed because contrast may not opacify non-dependent ducts 3."