|3D volume rendered CT image shows a 2nd right renal artery (arrows) arising from the right common iliac artery|
- "Normal" renal arterial arrangement = single bilateral renal arteries with hilar segmental branching. This occurred in 46% of cases in a landmark angiographic report published in 1978
- Normally, no intrarenal arterial anastomoses are present. Each artery represents an end artery -- interruption results in infarction of that segment
- Variations include double renal arteries, triple renal arteries, pre-hilar segmental branching, fetal lobulation and exaggerated size difference (greater than 2 cm).
- Most common variations are multiple renal arteries followed by pre-hilar segmental branching
Knowledge of Renal Vascular Variations is Important For:
- Renal transplantation
- Renovascular hypertension
- Vascular reconstruction for congenital and acquired lesions
- Reconstructive surgery for abdominal aortic aneurysms
Our case: Double right renal artery with the smaller branch originating from the common iliac artery
- Harrison, Jr., et al. Incidence of anatomical variants in renal vasculature in the presence of normal renal function. Ann Surg 1978;188:83-89.
- Ozkan U, et al. Renal artery origins and variations: angiographic evaluation of 855 consecutive patients. Diagn Interv Radiol 2006;12:183-6.