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.
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.
- 1. Kamini Gupta, Ritu Galhotra, Kavita Saggar. Yo-yo reflux in partial duplication of ureter: A diagnosis on the color and pulse Doppler study. (2013) Muller Journal of Medical Sciences and Research. 4 (2): 116. doi:10.4103/0975-9727.118243
- 2. Lee A Grant, Nyree Griffin. Grainger & Allison's Diagnostic Radiology Essentials. (2018) ISBN: 9780323568845
- 3. Rehder P, Petersen J, Hofmann KJ, Schenk C, Trieb T, Glodny B. Yo-yo reflux in an incomplete duplex system causing severe hydronephrosis in a patient with contralateral renal agenesis. (2008) Renal failure. 30 (8): 818-21. doi:10.1080/08860220802272605 - Pubmed
- 4. Ozdoğan O, Ateş O, Kart Y, Aras F, Olguner M, Akgür F, Durak H. The diagnosis of yo-yo reflux with dynamic renal scintigraphy in a patient with incomplete ureteral duplication. (2012) Molecular imaging and radionuclide therapy. 21 (3): 114-6. doi:10.4274/Mirt.71 - Pubmed
- 5. Chalouhy E, Harran R, Ezzo G. [Various aspects of uretero-ureteral reflux in incomplete ureteral duplication]. (1992) Le Journal medical libanais. The Lebanese medical journal. 40 (1): 16-21. Pubmed
- 6. Chu WC, Chan KW, Metreweli C. Scintigraphic detection of 'yo-yo' phenomenon in incomplete ureteric duplication. (2003) Pediatric radiology. 33 (1): 59-61. doi:10.1007/s00247-002-0754-z - Pubmed