Duplex collecting system

Case contributed by Dr Erik Ranschaert


Urinary abnormality had been found during pregnancy on an antenatal ultrasound examination.

Patient Data

Age: 10 months
Gender: Male

Ultrasound examination shows a double pyelum in the left kidney, with mild dilatation.


Grade 5 reflux with a double excretory system on the left side. Fusion of both ureters just proximal to the bladder (cystoscopy confirmed the presence of only two ostia in the bladder). Hydronephrosis.

Case Discussion

MCU clearly shows a double excretory system with high grade vesicoureteral reflux and hydronephrosis (grade 5 reflux).

Grade 5 – gross dilatation of the ureter, pelvis and calyces; ureteral tortuosity; loss of papillary impressions.

A duplex collecting system.

PlayAdd to Share

Case information

rID: 11113
Published: 17th Oct 2010
Last edited: 21st Aug 2019
Tag: kidney
Inclusion in quiz mode: Included

Updating… Please wait.

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

 Thank you for updating your details.