Evaluation of Renal Vascular Variations with Multi-Section Computerized Tomography Angiography

The aim of our study is to determine the frequency and association of renal vascular variations. A total of 610 abdominal CT examinations, which were performed in the radiology unit of our hospital were evaluated retrospectively in terms of renal artery and renal vein variations. 60 patients were excluded from the study due to technical factors or situations related to the patient which complicated or completely prevented the examination of renal vascular structures. 550 patients (301 men, 249 women) were included in the study. The frequency of renal vascular variation was 44.2%. Renal artery variation is seen with a frequency of 28.3%, while renal vein variations are seen with a frequency of 26.5%. The most common renal artery variation is the right hilar accessory renal artery (35/550, 6.3%), while the most common renal veins variation is the right multiple renal veins (39/550, 7.1%). The coexistence of renal artery and vein variations was found to be 10.7%. The most common coexistence of renal artery and vein variation was found to be right hilar accessory renal artery-right multiple renal veins, right hilar accessory renal artery-left circumaortic renal vein (5/550, 0.09%). There was a statistically significant relationship between renal artery variation and renal vein variation (p<0,001). It was found that the rate of right hilar accessory renal artery, left polar accessory renal artery and late junction of left renal vein was significantly higher in men than in women (p: 0,003, p: 0,006, p:0,014). Renal vascular variations are seen in 44.2% of the population. In addition, the arterial and venous variations show a substantial coexistence, such as 10.7%. It should be known that its presence is extremely important before endovascular interventional procedures and surgical procedures and during the investigation of renovascular hypertension, pelvic varices, and varicocele etiology.