ranging from 25% to 40% of kidneys. Aberrant renal arteries may be present, and may complicate surgical procedures. Clinical significance Stenosis Renal artery stenosis, or narrowing of one or both renal arteries will lead to hypertension as the affected kidneys release renin to increase blood pressure to preserve perfusion to the kidneys. RAS is typically diagnosed with duplex ultrasonography of the renal arteries. It is treated with the use of balloon angioplasty and stents, if necessary. Atherosclerosis Atherosclerosis can also affect the renal arteries and can lead to poor perfusion of the kidneys leading to reduced kidney function and, possibly, renal failure Renal artery aneurysm A dilated renal artery measuring twice its normal size indicates a renal artery aneurysm. Trauma A renal artery is damaged in 4% of blunt traumas and 7% of penetrating traumas to the abdomen. Additional images References External links - "Posterior Abdominal Wall: Branches of the Abdominal Aorta" Arteries of the abdomen