Mirizzi syndrome: History, current knowledge and proposal of a simplified classification

Table 1 Mirizzi syndrome “anatomy”

Gallbladder	Cystic duct	Bile duct	Fistulas
Thick or thin atrophic walls[25,26,37]	Obliterated cystic duct[2,25,37]	Partial obstruction by external compression or by a gallstone eroding into the bile duct	Cholecystocholedochal fistula[28]
Impacted gallstones at the infundibulum or at the Hartmann’s pouch[26,30,32,37]	Occasional absence of cystic duct[2,25,30]	Normal caliber distal bile duct with walls of normal thickness[2,25,32]	Cholecystoenteric fistula[4,8,28]
	A long cystic duct running parallel to the common bile duct with low insertion[1,25,26,30,31,34]	A dilated proximal bile duct with thick inflamed walls[2,25,32]
	A normal short cystic duct[2,26,30]