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.

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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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