The variations of the renal segments in Korean adults

Kim, Kwang Jin; Choi, Byoung Young; Lee, Hye Yeon; Kim, Dong Hyun; Sir, Won Seok; Chung, In Hyuk; Lee, Han Young; Suh, Jai Kwan

Abstract

To investigate the variations of the renal segments in Korean adults. the findings of selective renal arteriograms from l3O kidneys were analyzed. The boundary on the lateral surface of the kidney between the areas supplied by anterior and posterior branches of the renal artery was investigated by analysis of the findings of 100 renal arteriograms. In 75% of the cases the boundary was observed to be posterior to the lateral borderline of the kidney and the configuration of it was variable. Under the definition of the segmental artery as the eecorrd branch of the renal artery that could be tied outside the hilum, the distribution of the renal segments was observed. The number of the renal segments in a kidney ranged from 3 to 7 and the frequency was 1.6%. 24.2%. 50.8%. 22.6% and 0.8% in the order of increment. The 5-segment-kidney, the most common form described in many textbooks, was observed in 50.8% of the cases and also was the most common form in this study. In most of the cases(90%) superior and inferior segments were observed. The level of each boundary of the superior and inferior segments was observed on the ventral and dorsal surface of the kidney and compared. The level was identical on both surfaces in 56.1% and 31.8 5t of the superior and inferior segments respectively. The variations in the origin and the number of arteries supplying the superior and inferior segments was compared and the result revealed more complex variations in the former. From the viewpoint of clinical application these results may provide useful information and important suggestions for renal conservative surgery. Considering that the distribution of the renal segments is variable and the number and origin of the arteries supplying the superior and inferior segments, which are frequently indicated for partial nephrectomy. are variable. it may contribute to better surgical results if surgeons observe and decide the resection margin preoperatively by taking the selective renal arteriography from several directions.