Table 2. Anatomic abnormalities found in Mirizzi syndrome.

Anatomic structure	Finding
Gallbladder	Atrophy—anomalous communication with: bile duct, stomach, duodenum, colon, another abdominal viscera
Infundibulum (Hartmann’s pouch)	Impacted gallstone
Bile duct	External compression, gallstone eroded, distal, normal caliber, normal thickness walls
	Proximal, normal caliber, thick and inflamed walls
Cystic duct	Abnormal high merger with common hepatic duct
	Entrance to right hepatic duct
	Congenital anatomical variations
Hepatic duct	Accessory hepatic duct
	Cholecystohepatic duct