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. 2017 Jan-Mar;27(1):6–12. doi: 10.4103/0971-3026.202966

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Copyright: © 2017 Indian Journal of Radiology and Imaging

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.

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Todani classification of choledochal cyst. Type IA is cystic dilatation; IB – focal saccular dilatation; IC – smooth fusiform dilatation of entire extrahepatic bile duct; Type II is diverticulum of extrahepatic bile duct; Type III is dilatation of distal common bile duct confined to wall of duodenum (choledochocele); Type IVA is multiple sites of dilatation of both extra and intrahepatic biliary tree; Type IVB is multiple sites of dilatation of extrahepatic bile duct only (string-of-beads appearance); Type V is saccular dilatation of only intrahepatic biliary tree (Caroli's disease)