Table 3. Hepatic artery variations: Michels's and Hiatt's classifications [6, 7].

Hepatic artery variation	Michels classification	Hiatt classification
Normal anatomy	Type I	Type I
Replaced left hepatic artery originating from the left gastric artery	Type II	Type II
Replaced right hepatic artery originating from the superior mesenteric artery	Type III	Type III
Co-existence of Type II and III	Type IV	Type IV
Accessory left hepatic artery originating from the left gastric artery	Type V	Type II
Accessory right hepatic artery originating from the superior mesenteric artery	Type VI	Type III
Accessory left hepatic artery originating from the left gastric artery and accessory right hepatic artery originating from the superior mesenteric artery	Type VII	Type IV
Accessory left hepatic artery originating from the left gastric artery and replaced right hepatic artery originating from the superior mesenteric artery	Type VIII	Type IV
Common hepatic artery originating from the superior mesenteric artery	Type IX	Type V
Right and left hepatic arteries originating from the left gastric artery	Type X	NOD
Common hepatic artery directly originating from the aorta	NOD	Type VI

NOD, “not otherwise described” in the literature.