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

Article information

rID: 69039
System: Urogenital
Synonyms or Alternate Spellings:
  • See saw reflux
  • Seesaw reflux
  • Saddle reflux
  • Uretero ureteral reflux
  • Ureteroureteral reflux

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