Which vessel courses posterior to the inferior vena cava?

• A. Left renal artery
• B. Right renal artery
• C. Hepatic artery
• D. Superior mesenteric artery

Answer: (B)

In the abdomen, the inferior vena cava sits along the posterior wall on the right side. The vessel that reaches the right kidney by passing behind the IVC is the right renal artery. It arises from the aorta and then travels upward to the hilum of the right kidney, taking a course posterior to the IVC to reach its target. This posterior relationship to the IVC is what identifies it as the vessel that courses behind the IVC.

The other vessels don’t share this posterior path relative to the IVC: the hepatic artery travels toward the liver within the hepatoduodenal ligament, the superior mesenteric artery runs anterior to the IVC as it branches off the aorta, and the left renal artery goes to the left kidney without this characteristic posterior relationship to the IVC.