Anatomical Study and Classification of the Precaval Right Renal Arteries
A 200-case angioCT study that quantifies precaval right renal arteries, proposes a topographic classification, and highlights surgically important rare configurations.
Precaval right renal arteries are not rare and require topographic, not merely numerical, description.
Among 200 archived angioCT studies, 24 patients had 25 precaval RRAs. The study proposed a surgical classification based on the vessel’s relationship to the renal vein and renal entry site.
Two hundred CT angiograms
The study examined 105 males and 95 females and defined four broad topographic types, with five specific precaval subtypes.
Cases
Archived angioCT datasets.
Patients
Had at least one precaval RRA.
Precaval arteries
One patient had a double precaval RRA.
Origin levels
Range in 23 of the 24 precaval cases.
Click the subtype
The classification captures where a precaval artery enters the kidney and how it relates to the right renal vein.
Type 2a · hilar precaval artery — 9 cases
The precaval RRA entered the renal hilum as a hilar artery.
Subtype counts
The most frequent precaval subtype was 2a.