Abstract

Introduction

Duplex collecting system is a common congenital urinary system anomaly and is usually asymptomatic. Vascular variations associated with a duplex system are common but haven’t been reported as obstructive.

Case report

14-month-old female had a right sided incomplete ureteral duplication complicated by lower pole hydroureteronephrosis due to distal ureteral obstruction by an aberrant vessel crossing the bifid ureters at ureteric junction of these bifid ureters. Prenatal imaging detected right hydronephrosis. Magnetic resonance suggested a diagnosis of duplicated ureters. At surgery, an aberrant artery compressed the lower moiety ureter at the bifid ureteric junction. The stenotic section was resected and ureter segments were anastomosed. The occluding small artery was not resected to preserve vascularization.

Discussion/Conclusion

An anatomical vascular variation can cause proximal ureteral dilatation and segmental hydronephrosis in a bifid system.

中文翻译：

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血管异常导致下段输尿管积水的不完全双肾系统

摘要

介绍

双重集合系统是一种常见的先天性泌尿系统异常，通常无症状。与双工系统相关的血管变异很常见，但尚未报告为阻塞性的。

案例报告

14 个月大的女性患有右侧输尿管不完全重复，并发输尿管下极积水，原因是远端输尿管在这些双歧输尿管的输尿管交界处穿过双歧输尿管的异常血管阻塞。产前影像学检查发现右侧肾积水。磁共振提示重复输尿管的诊断。在手术中，一条异常动脉在双歧输尿管交界处压迫了输尿管下部。切除狭窄部分并吻合输尿管段。未切除闭塞的小动脉以保留血管。

讨论/结论

解剖血管变异可导致双歧系统中的近端输尿管扩张和节段性肾积水。