Table 1.

Classifications of Mirizzi Syndrome.

Authors	McSherry et al.-1982	Csendes et al.-1989 and Complemented in 2008	Beltrán et al.-2012	Payá-Llorente et al.-2017	Nagakawa et al.-1997
Classification	Type I—external compression of the bile duct	Type I—external compression of the bile duct	Type I—external compression of the bile duct	Type 1—external compression of the bile duct	Type I—external compression of the bile duct
	Type II—cholecystobiliary fistula	Type II—cholecystobiliary fistula—up to 1/3 of the bile duct wall erosion	Type IIa—cholecystobiliary fistula involving <50% of the bile duct diameter	Type 2—cholecystobiliary fistula involving <50% of the bile duct diameter	Type II—cholecystobiliary fistula
		Type III—cholecystobiliary fistula—up to 2/3 of the bile duct wall erosion
		Type IV—cholecystobiliary fistula—complete destruction of the bile duct wall and fusion with gallbladder	Type IIb—cholecystobiliary fistula involving >50% of the bile duct diameter	Type 3—cholecystobiliary fistula involving >50% of the bile duct diameter
		Type Va—cholecystoenteric fistula	Type IIIa—cholecystoenteric fistula	Subtypes describing cholecystoenteric fistula: A-no fistula/B-fistula without gallstone ileus/C-fistula with gallstone ileus	Type III—gallstones in the cystic duct and common hepatic duct confluence
		Type Vb—cholecystoenteric fistula with gallstone ileus	Type IIIb—cholecystoenteric fistula with gallstone ileus		Type IV—stricture without stones (e.g., due to cholecystitis)