What anatomical feature is noted when a replaced right hepatic artery is present?

The correct anatomical feature associated with a replaced right hepatic artery is that it is posterior to the portal vein. In cases of a replaced right hepatic artery, this artery typically arises from the superior mesenteric artery (SMA) or aorta rather than the usual branching from the common hepatic artery.

The location of the replaced right hepatic artery, being posterior to the portal vein, is significant in surgical anatomy, especially during procedures involving the liver and surrounding structures. Understanding this relationship helps surgeons anticipate vascular anatomy variations, ensure proper dissection, and minimize the risk of injury to the artery during liver surgeries or interventions near the portal vein. Recognizing this anatomical positioning is essential for maintaining proper surgical technique and achieving successful outcomes.

Overall, identifying a replaced right hepatic artery as posterior to the portal vein is critical knowledge for any surgeon operating in the hepatobiliary region.