Related Experiment Video
Updated: Feb 17, 2026

Multilevel Microdissection and Functional-Structural Profiling of Human Renal Arterial Branches
Published on: September 5, 2025
Left testicular artery arching over the ipsilateral renal vein
Munekazu Naito1, Hayato Terayama, Yoichi Nakamura
1Department of Anatomy, Tokyo Medical University, 6-1-1 Shinjuku, Shinjuku-ku, Tokyo 160-8402, Japan. munekazu@tokyo-med.ac.jp
Aim:
To report two cases of the left testicular artery arching over the left renal vein (LRV) before running downward to the testis.
Methods:
The subjects were obtained from two Japanese cadavers. During the student course of gross-anatomical dissection, the anatomical relationship between the testicular vessels and the renal vein was specifically observed.
Results:
The arching left testicular artery arose from the aorta below the LRV and made a loop around the LRV, which appeared to be mildly compressed between the arching artery and the psoas major muscle.
Conclusion:
Clinically, compression of the LRV between the abdominal aorta and the superior mesenteric artery occasionally induces LRV hypertension, resulting in varicocele, orthostatic proteinuria and hematuria. Considering that the incidence of a left arching testicular artery is higher than that of a right one, an arching left artery could be an additional cause of LRV hypertension.
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