SURVEY OF NORMAL ANATOMY AND ANATOMICAL VARIATIONS OF THE BILIARY-PANCREATIC SYSTEM USING MAGNETIC RESONANCE IMAGING
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Abstract
Background: Currently, liver, biliary, and pancreatic surgeries have become more common, advanced, and complex. Accurate evaluation of the biliary and pancreatic anatomy is essential for the success and safety of these surgeries. Magnetic Resonance Cholangiopancreatography (MRCP) is a non-invasive, safe technique that helps assess biliary and pancreatic anatomy preoperatively. Objective: The aim of this study was to survey the anatomical variations of the intrahepatic and extrahepatic bile ducts, the cystic duct, and the pancreatic duct using MRCP. Method: 320 patients who underwent abdominal MRI with a 1.5T machine, including MRCP sequences. Variations of the right hepatic duct (RHD), left hepatic duct (LHD), cystic duct (CD), and pancreatic duct (PD) were evaluated and classified. The study provided the prevalence of these variations within the study population. Result: We noted that the Huang A1 type of the RHD was the most prevalent, accounting for 69.06%, with the prevalence decreasing from Huang A1 to Huang A5. The Huang B1 type of LHD was the most common, at 95.25%, while other variations were rare. The CD draining into the right lateral wall was the most common variant at 72.39%. The descending type of PD was the most prevalent at 51.61%, followed by the sigmoid and straight types, with the ring type being rare. The single-branch PD type was the most common, accounting for 77.1%. Conclusion: The most common variations were Huang A1 of the RHD, Huang B1 of the LHD, the CD draining into the right lateral wall, and the descending type of PD with a single branch.
Article Details
Keywords
MRCP, biliary duct variations, cystic duct variations, pancreatic duct variations.
References

2. Hall, C., et al., Intraoperative Cholangiography in Laparoscopic Cholecystectomy: A Systematic Review and Meta-Analysis. 2023. 27(1).

3. Rösch, T., et al., A prospective comparison of the diagnostic accuracy of ERCP, MRCP, CT, and EUS in biliary strictures. 2002. 55(7): p. 870-876.

4. El Hariri, M., M.M.J.E.J.o.R. Riad, and N. Medicine, Intrahepatic bile duct variation: MR cholangiography and implication in hepatobiliary surgery. 2019. 50: p. 1-8.

5. Aljiffry, M., et al., Biliary anatomy and pancreatic duct variations: a cross-sectional study. 2020. 26(4): p. 188.

6. Türkvatan, A., et al., Congenital variants and anomalies of the pancreas and pancreatic duct: imaging by magnetic resonance cholangiopancreaticography and multidetector computed tomography. 2013. 14(6): p. 905-913.

7. Adibelli, Z.H., et al., Anatomic variations of the pancreatic duct and their relevance with the Cambridge classification system: MRCP findings of 1158 consecutive patients. 2016. 50(4): p. 370-377.

8. Chaib, E., et al., Bile duct confluence: anatomic variations and its classification. 2014. 36: p. 105-109.

9. Taghavi, S.A., et al., Anatomical variations of the biliary tree found with endoscopic retrograde cholagiopancreatography in a referral center in southern Iran. 2017. 9(4): p. 201.

10. Sarawagi, R., et al., Anatomical variations of cystic ducts in magnetic resonance cholangiopancreatography and clinical implications. Radiol Res Pract 2016: 3021484. 2016.
