Replaced right hepatic artery and its segmental distribution

Abstract

A case of replaced right hepatic artery arising from the superior mesenteric artery is presented with its segmental distributionand the morphometric features. The case was encountered in a 66-year-old formalin-fixed male cadaver during dissection forundergraduate lab education. Length and diameter of the replaced right hepatic artery were measured 63.10 mm and 3.6 mm,respectively. The replaced right hepatic artery coursed posterior to the portal vein initially, and then lateral to it. One of its branches entered into liver segments V and VIII, and the other entered into segments VI and VII. Left hepatic artery arose from the common hepatic artery and gave the middle hepatic artery 11.9 mm distal to its origin. Length and diameter of the middle hepaticartery were measured 30.2 mm and 1.2 mm, respectively. After giving a small branch to caudate lobe, the middle hepatic arteryreached the quadrate lobe. The diameter and segmental distribution of replaced right hepatic artery was similar to the normalright hepatic artery described in earlier studies. The middle hepatic artery arose from the left hepatic artery at a substantial distance from the liver tissue in the presence of a replaced right hepatic artery. This is of clinical significance in liver transplantationsas the arterial supply of segment IV is from the middle segmental artery.