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Fig. 2 —Intrahepatic biliary duct branching patterns are divided into
seven types. Aberrant ducts are indicated in gray. C = cystic duct, Acc =
accessory duct. (Adapted with permission from
[15])
A, Diagram shows type 1, conventional branching.
B, Diagram shows type 2, which is triple confluence of right
anterior segmental duct draining segments V and VIII (RAS), right posterior
segmental duct draining segments VI and VII (RPS), and left hepatic duct (LHD)
into common hepatic duct (CHD).
C-E, Diagram shows types 3A, 3B, and 3C: RPS drains anomalously into
LHD, CHD, or cystic duct, respectively.
F, Diagram shows type 4: Right hepatic duct (RHD) drains into cystic
duct.
G and H, Diagram shows types 5A and 5B: Right accessory duct
drains into CHD or RHD.
I, Diagram shows type 6: Segments II and III drain individually into
RHD or CHD.
