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Published: 2016-05-26

Common and Uncommon Anatomical Variants of Intrahepatic Bile Ducts in Magnetic Resonance Cholangiopancreatography and its Clinical Implication

Radha Sarawagi, Shyam Sundar, Sameer Raghuvanshi, Sanjeev Kumar Gupta, Gopal Jayaraman

(Department of Radiodiagnosis, People’s College of Medical Sciences and Research Center, Bhopal, India)

Pol J Radiol 2016; 81:250-255

DOI: 10.12659/PJR.895827

BACKGROUND: Preoperative knowledge of intrahepatic bile duct (IHD) anatomy is critical for planning liver resections, liver transplantations and complex biliary reconstructive surgery. The purpose of our study was to demonstrate the imaging features of various anatomical variants of IHD using magnetic resonance cholangio-pancreatography (MRCP) and their prevalence in our population.
MATERIAL AND METHODS: This observational clinical evaluation study included 224 patients who were referred for MRCP. MRCP was performed in a 1.5-Tesla magnet (Philips) with SSH MRCP 3DHR and SSHMRCP rad protocol. A senior radiologist assessed the biliary passage for anatomical variations.
RESULTS: The branching pattern of the right hepatic duct (RHD) was typical in 55.3% of subjects. The most common variant was right posterior sectoral duct (RPSD) draining into the left hepatic duct (LHD) in 27.6% of subjects. Trifurcation pattern was noted in 9.3% of subjects. In 4% of subjects, RPSD was draining into the common hepatic duct (CHD) and in 0.8% of subjects into the cystic duct. Other variants were noted in 2.6% of subjects. In 4.9% of cases there was an accessory duct. The most common type of LHD branching pattern was a common trunk of segment 2 and 3 ducts joining the segment 4 duct in 67.8% of subjects. In 23.2% of subjects, segment 2 duct united with the common trunk of segment 3 and 4 and in 3.4% of subjects segment 2, 3, and 4 ducts united together to form LHD. Other uncommon branching patterns of LHD were seen in 4.9% of subjects.
CONCLUSIONS: Intrahepatic bile duct anatomy is complex with many common and uncommon variations. MRCP is a reliable non-invas... read more

Keywords: anatomic variation, Bile Ducts, Intrahepatic, Cholangiopancreatography, Magnetic Resonance

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