Mirizzi syndrome refers to compression of CBD or CHD from one or more calculi at the cystic duct or neck of gall bladder resulting in obstruction and jaundice. It is a functional hepatic syndrome but can often present with biliary duct dilatation and can mimic other hepatobiliary pathology such as cholangiocarcinoma.

Types of Mirizzi syndrome:

Type-I: external compression of common bile duct.

Type-II: cholecysto-biliary fistula is present with erosion of less than one third of the circumference of the bile duct.

Type-III:cholecysto-biliary fistula involving upto two third of the duct circumference.

Type-IV: cholecysto-biliary fistula causing complete destruction of bile duct.