Table 1.

Overview of the Michels and Hiatt classifications of hepatic artery types

Description	Michels type	Hiatt type
Normal anatomy	I	I
Replaced LHA from LGA	II	II
Replaced RHA from SMA	III	III
Replaced RHA + LHA	IV	IV
Accessory LHA	V	II
Accessory RHA	VI	III
Accessory RHA + LHA	VII	IV
Replaced RHA + accLHA or replaced LHA + accRHA	VIII	IV
CHA from SMA	IX	V
CHA from LGA	X	–
CHA from aorta	–	VI

LHA, left hepatic artery; LGA, left gastric artery; RHA, right hepatic artery; SMA, superior mesenteric artery; acc, accessory; CHA, common hepatic artery