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Journal of Diagnostic Medical Sonography, Vol. 15, No. 4, 161-163 (1999)
DOI: 10.1177/875647939901500404

Interlacing Left Biliary Duct and Left Portal Vein

A Normal Variant

Nabil A. Yassa, MD

Department of Radiology, Universitv of Southern California, USC/Norris Cancer Center & Hospital, 1441 Eastlake Avenue, Room 064, Los Angeles, CA 90033. Tel: 323-86-3226; Fax: 213-226-2280 yassa{at}hsc.usc.edu

Terry Finstad, MD

Kevin P. Lee, RDMS, RVT

Department of Radiology, University of Southern Califorma, USC/Norris Cancer Center & Hospital, Los Angeles, California.

The interlacing course of the left biliary duct with the left portal vein is a normal finding. In 20 random right upper quadrant ultrasound examinations, the left biliary duct was seen interlaced with the left portal vein by gray scale and color Doppler ultrasound. After first observing this normal variant, a prospective evaluation of 100 right upper quadrant ultrasound images revealed its occurrence in 2% of cases.

Key Words: portal vein • ultrasound • bile ducts


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