FIGURE 4. Confluence patterns of the left intrahepatic bile ducts in 55 cases. Type H, the left medial sectional bile duct4 enters the left lateral sectional bile duct. Type I, 4 enters the confluence of the left lateral anterior3 and posterior2 segmental bile ducts; Type J, 4 enters 3; Type J’, 3 runs caudally to the umbilical portion of the left portal vein; and Type K, 4 enters the hepatic confluence. LHD, left hepatic duct.