Todani Classification of Choledochal cysts
Mnemonic: Consider I is “Extrahepatic” and V is “Intrahepatic”, then –
- Type I, II and III = Extrahepatic
- Type IV = Extrahepatic + Intrahepatic
- Type V = Intrahepatic
Most common: Type I
2nd most common: Type IV
Type I-III: Extrahepatic
Mnemonic: 123 EDC
Type I: Entire CBD dilated
Type II: Diverticulum
Type III: Choledochocele (Intraduodenal portion of CBD)
Type IV: Extrahepatic + Intrahepatic
Mnemonic: A for “And or Additional” and B for “Bunch”
Type IVa: Both intrahepatic AND extrahepatic cysts
Type IVb: Multiple extrahepatic cysts only
Type V: Intrahepatic cysts only (Caroli’s disease)
He is the section editor of Orthopedics in Epomedicine. He searches for and share simpler ways to make complicated medical topics simple. He also loves writing poetry, listening and playing music. He is currently pursuing Fellowship in Hip, Pelvi-acetabulum and Arthroplasty at B&B Hospital.
Thank you. Interesting.