TITLE:
Imaging Confirmation of Yo-Yo Reflux in Cases with Incomplete Ureteric Duplication
AUTHORS:
Ashraf Talaat Youssef
KEYWORDS:
Yo-Yo Reflux, Ureteric Duplication, Duplex Kidney, Color Duplex Sonography
JOURNAL NAME:
Open Journal of Urology,
Vol.6 No.12,
December
21,
2016
ABSTRACT: Background: Incomplete ureteric duplication
can be associated with either ureteropelvic obstruction involving the lower
moiety or reflux between the ureters (yo-yo reflux). Yo-yo reflux can be a
cause of repeated urinary tract infection with subsequent renal damage. Aim of
the work: The current study evaluated the presence of yo-yo reflux as reason of
upper moiety dilation in cases with incomplete duplication of upper urinary
tract. Methodology: 10 cases with a dilated upper moiety of duplex renal
pelvicalyceal system were examined with color duplex ultrasonography. All were
further investigated with intravenous pyelography (IVP), and ascending/micturating
cystography. Results: 9 cases with upper moiety dilation showed complete
duplication of the pelvicalyceal systems and ureters and 1 case with dilated
upper moiety showed incomplete ureteric duplication in which the diagnosis of
Yo-yo reflux was confirmed by color duplex ultrasound in addition to the
intravenous pyelography findings. Conclusion: The presence of
antegrade/retrograde flow within the dilated moiety of a duplex kidney during
color duplex study in addition to the intravenous pyelography findings can
confirm the diagnosis of yo-yo reflux.