Yo-yo reflux

Last revised by Kieran Kusel on 22 Sep 2021

Yo-yo reflux or uretero-ureteral reflux is noted in partial ureteral duplication 1,2. It is the reflux of urine from the normal caliber ureter to the dilated ureter. 

Radiographic features

Yo-yo reflux should be suspected when there is asymmetric dilatation of ureters. It can be diagnosed with color Doppler ultrasonography but radionuclide renography has been suggested as an ideal test 6.

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