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- Title
A new notable compression source of left renal vein entrapment: right renal artery.
- Authors
Sun, Zhanfeng; Wang, Haitao; Jiang, Huijie; Shen, Yongbin; Shi, Ziming; Wang, Qingxiao; Wang, Han; Jiang, Weiliang; Du, Xuanyi
- Abstract
Purpose: To estimate the incidences of left renal vein (LRV) entrapment by right renal artery (RRA), a phenomenon primarily reported as case reports. Methods: The cross-sectional study consecutively screened renal vessel CT data of 38 (Renal) patients with nephropathy and 305 (Non-renal) patients with peripheral arterial diseases in a teaching hospital in northeast China between November 2018 and March 2023. The LRV compression by adjacent anatomical structures, including but not limited to RRA and multiple compression-related parameters, were investigated through multiplanar analysis of the CT data. Results: The overall LRV entrapment rates by adjacent structures were 41.93% (12/31) and 24.00% (6/25), the rates of RRA-sourced LRV compression 22.58% (7/31) and 20.00% (5/25), and the rates of compression by superior mesenteric artery (SMA) 16.13% (5/31) and 4.00% (1/25) in the Renal and Non-renal groups, respectively, with no significance. The venous segments distal to the RRA-compressed site had a significantly larger transectional lumen area than those of the non-compressed veins in both groups (3.09 ± 1.29 vs. 1.82 ± 0.23, p < 0.001 and 4.30 ± 2.65 vs. 2.12 ± 0.55, p = 0.006; maximum-to-minimum area ratios in Renal and Non-renal groups, respectively). Nearly 80% of RRAs were found arising anteriorly rightwards instead of passing straight to the right. Conclusion: RRA-sourced LRV compression was not rare, and its incidence was higher than that of the compression by SMA in both patient cohorts. RRA could be a more common compression source than SMA concerning LRV entrapment. Further investigations involving different populations, including healthy individuals, are needed.
- Subjects
CHINA; NUTCRACKER syndrome; RENAL artery; RENOVASCULAR hypertension; PERIPHERAL vascular diseases; MESENTERIC artery; RENAL veins
- Publication
World Journal of Urology, 2024, Vol 42, Issue 1, p1
- ISSN
0724-4983
- Publication type
Article
- DOI
10.1007/s00345-024-05053-7