Abstract
The right hepatic artery is an important arterial supply to right lobe of the liver. And the knowledge of the normal anatomy and anatomical variations of the right hepatic artery is essential to perfume, and will minimize morbidity, and also help to decrease the number of complications of hepatobiliary surgery. This study was conducted on eleven human cadavers, which were obtained from the routine autopsies at the dissection room of the Anatomy Department. During dissection of the eleven cadaveric livers, we found a case with an ex-ceptional anatomic variation; a replaced right hepatic artery (RRHA) coming off the superior mesenteric artery (SMA), directly to the hepatic right lobe passing through the Calot’s triangle, crossing behind the common hepatic duct (CHD). Our objective is to draw much attention to this particularly anatomic variation of the origin of the RRHA as well as its clinical importance in order to ensure that no damage will be made during gastrointestinal and hepatobiliary surgery.
Highlights
The anatomy of the hepatic artery is of great importance in hepatobiliary surgery, especially in cholecystectomy and liver transplantation
During dissection of the eleven cadaveric livers, we found a case with an exceptional anatomic variation; a replaced right hepatic artery (RRHA) coming off the superior mesenteric artery (SMA), directly to the hepatic right lobe passing through the Calot’s triangle, crossing behind the common hepatic duct (CHD)
The celiac trunk (CT) is the first ventral branch of the abdominal aorta arising at T12/L1 vertebral body level; it passes forward dividing into left gastric artery, common hepatic artery (CHA) and splenic artery, which is the classic distribution pattern
Summary
The anatomy of the hepatic artery is of great importance in hepatobiliary surgery, especially in cholecystectomy and liver transplantation. The celiac trunk (CT) is the first ventral branch of the abdominal aorta arising at T12/L1 vertebral body level; it passes forward dividing into left gastric artery, common hepatic artery (CHA) and splenic artery, which is the classic distribution pattern. The superior mesenteric artery (SMA) is the second ventral branch of the abdominal aorta arising below the level of the celiac trunk; it gives inferior pancreaticoduodenal, middle colic, right colic, ileocolic, jejunal and ileal branches [4]. When the (RHA) does not arise from the (PHA) or (CHA), its origin is shifted to the aorta or any of the arteries whose normal course is towards right side of the aorta like superior mesenteric artery (SMA), gastroduodenal artery, right gastric artery, or celiac trunk [6] [7]. The persistence of longitudinal channels between primitive vessels may lead to vascular anomalies or variations [12]
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