Appearances of the circumcaval ureter on excretory urography and MR urography: A single-center case series
A 34-year-old man presented with intermittent right flank pain for 6 months. Preliminary ultrasound for suspected calculus disease showed right hydroureteronephrosis with a dilated proximal ureter but no evidence of calculi. Excretory urography showed right-sided grade 4 hydroureteronephrosis, the ureter being dilated up to the L4 vertebral level, with a tapered segment seen coursing superiomedially. A diagnosis of circumcaval ureter was suggested, and MRU was performed. MRU showed grade 4 hydronephrosis with the medialized segment of the ureter coursing around the IVC, and axial sections clearly depicted the anatomy [].