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Relationship between Left Biliary Duct System and Left Portal Vein: Evaluation with Three-dimensional Portocholangiography¹

¹ From the Department of Academic Surgery, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuou-ku, Chiba 260-0856, Japan (A.C., S.O., Y.Y., Y.I., T.O.); and Department of Surgery, Chiba Prefectural Sawara Hospital, Japan (M.R.). Received June 19, 2002; revision requested August 21; revision received October 10; accepted December 19. Address correspondence to A.C. (e-mail: cho@maple.ocn.ne.jp).

PURPOSE: To investigate the relationship between the left biliary duct system and the left portal vein by using in vivo analysis of the human liver with three-dimensional portocholangiography.

MATERIALS AND METHODS: Twenty-seven patients underwent helical computed tomography during both arterial portography and cholangiography. Three-dimensional portocholangiograms were reconstructed to evaluate the relationship between the left biliary duct system and the left portal vein, in particular the umbilical portion.

RESULTS: In 16 (59%) patients, segment II and III ducts united just above the umbilical portion or laterally to it, and the segment IV duct joined medially to the umbilical portion. In eight (30%) patients, segment III and IV ducts united medially to the umbilical portion and the segment II duct joined at a point close to the hepatic hilum. In three (11%) patients, three ducts from segments II–IV united at a position immediately medial to the umbilical portion.

CONCLUSION: Three types of left bile duct anatomy were seen in relation to the left portal vein.

© RSNA, 2003

Index terms: Bile duct radiography, 76.122 • Bile ducts, anatomy, 76.92 • Bile ducts, CT, 76.12112, 76.12115, 76.12117 • Bile ducts, neoplasms, 76.321 • Portal vein, anatomy, 957.92 • Portal vein, CT, 957.12912

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