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Table 1 Conventional and common variations of biliary anatomy according to the insertion of the right lateral sectoral duct

From: Left hepatic trisectionectomy for hilar cholangiocarcinoma presenting with an aberrant biliary duct of segment 5: a case report

Type Anatomical comments
I Conventional bifurcation type; right lateral sectoral duct joins the right paramedian duct to form the right hepatic duct, and then finally, the right and left hepatic ducts join to form the common hepatic duct
II Trifurcation type; right lateral sectoral duct joins
the confluence of the right paramedian sectoral duct and the left hepatic duct to form a trifurcation
III Right lateral sectoral duct joins separately to the left hepatic duct
IV Right lateral sectoral duct joins separately to the common hepatic duct
V Right lateral sectoral duct joins separately to the cystic duct