Crossing vessels causing uretero-pelvic junction obstruction

Case contributed by Dr Hidayatullah Hamidi


Chronic dull left flank pain. Ultrasonography reported left sided hydronephrosis without nephrolithiasis.

Patient Data

Age: 50 years
Gender: Female

Left sided grade II hydronephrosis (according to Onen's grading) without parenchymal loss.

No nephrolithiasis or hydroureter. 

Left renal vein branches cross the ureteropelvic junction before joining the renal hilum. This results in extrinsic compression of the pelviureteric junction; best seen on coronal images.

Case Discussion

Crossing vessels causing pelviureteric junction obstruction is a known entity. Contrast enhanced CT can demonstrate the vascular branches crossing and causing extrinsic compression over the pelviureteric junction.

PlayAdd to Share

Case information

rID: 56107
Published: 16th Oct 2017
Last edited: 23rd Oct 2017
System: Urogenital
Inclusion in quiz mode: Included
Institution: French Medical Institute for Mothers and Children

Updating… Please wait.

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.