Unusual arterial supply of the segment IV with interlobar bridge and right replaced hepatic artery: a case report

Abstract

A replaced right hepatic artery (rRHA) arising from the superior mesenteric artery and an interlobar parenchymal bridge over the sagittal fissure have been observed on a 64-year-old formalin-fixed male cadaver in the anatomy laboratory. As we have followed a detailed segmental anatomy, we encountered an arterial distribution of segment IV featuring a different pattern from the literature so far. According to our observations, the segment I is supplied by both left (LHA) and middle (MHA) hepatic arteries; the segments II and III are supplied by the LHA while the segment IV is supplied by both the MHA and rRHA. The segments V-VIII are supplied only by the rRHA. The case emphasizes the importance of arterial variations of liver in terms of the surgical procedures during the liver transplantation, hepatic resections, hepatic tumors, and etc. Our discussion focuses to the arterial supply of the segment IV and possible complications it may cause during/after the liver operations.

An unusual case report of a subhepatic appendix and an interlobar hepatic bridge in a patient with acute cholecystitis

“…Contributing to the unusual nature of this case was the presence of a subhepatic bridge containing liver parenchymal tissue. Only three other cases of an interlobar parenchymal bridge could be found in the literature [ 9–11 ]. The first was a cadaveric dissection with a variation in hepatic blood supply.…”