Incidence of Anatomical Variants in Renal Vasculature in the Presence of Normal Renal Function

Abstract

This report defines the incidence of variations in the renal vascular pedicle in a group of patients with normal renal function as determined by standard laboratory criteria. The study group consisted of 166 patients undergoing renal arteriography as potential renal allograft donors. Ninety-seven patients were male and 69 were female. Ages ranged from 18-54 years, median age being 37 years. All patients underwent preliminary screening tests including blood chemistries, creatinine clearance, urinalysis, culture and excretory urography. If these studies were normal, renal arteriography was performed utilizing flush aortogram and, in 20% of cases, selective renal arteriography. The most common anomaly was the presence of multiple renal arteries supplying the same kidney, occurring in 32% of cases. Prehilar segmental branching was the second most common variation, occurring in 17% of patients. Other variations included fetal lobulation (4%), significant stenosis at origin of the renal artery (2%), fibromuscular dysplasia (2%), microaneurysms (0.5%), true aneurysms (1%) and dromedary hump (0.5%). Less than one-half of the patients demonstrated the simplest vascular pedicle, namely, single artery and vein bilaterally. The incidence of anatomical variations in the renal vascular pedicle is greater than attributed to normal subjects in previous reports. Anomalies determine the choice of kidney in renal allografting and may disqualify a potential donor, even in the face of ostensibly normal renal function. Routine arteriography should be considered a standard prerequisite in the evaluation of potential living related renal donors.

Estudo do padrão arterial de 200 pedículos renais por meio de angiotomografias

“…Multiple renal arteries occur in 20% to 50% of the population, its variation being more common than for other organs 6,8,22 . These vessels are branches of a single segmental renal artery or independent vessels emerged directly from the aorta 22 .…”

“…These vessels are branches of a single segmental renal artery or independent vessels emerged directly from the aorta 22 . The multiple renal arteries relate to the persistence of mesonephric arteries, which embryonically form a vascular network that nourishes the kidneys, the suprarenal glands and the gonads on both sides of the aorta, between the sixth cervical and the third lumbar vertebrae, a region called urogenital arterial network.…”

A very rare variant in the colon supply - Arteria mesenterica media

“…4). The frequency of the accessory renal arteries ranges from 16 % to 32 % of cases 24,25 , being slightly higher on the right side as reported by Raman (16 % on the left side, 22 % on the right side) 26 . Lippert reported the arteria renalis accessoria inferior to be present in 7 % of cases in his overview of arterial variants 27 , Bergmann in 4.7 % of cases (composite of 45 authors and 10,967 kidneys) 28 .…”

Accessory Renal Arteries: A Cadaveric Study

“…Studies have shown multiple renal arteries in human kidneys. [17][18][19][20][21] This study showed maximum number of two accessory arteries in one kidney (9.09%). These results are important for harvesting donor for renal transplant.…”