Asymptomatic vesicoureteral reflux in children

Area of Science:

• Pediatric Urology
• Nephrology
• Diagnostic Imaging

Background:

• Primary vesicoureteral reflux (VUR) is a common condition in children presenting to urological clinics.
• The natural history and long-term outcomes of asymptomatic VUR require further elucidation.
• Screening protocols aim to identify VUR early to prevent renal complications.

Purpose of the Study:

• To retrospectively analyze the clinical presentation and outcomes of asymptomatic primary vesicoureteral reflux in children.
• To compare the natural history of asymptomatic VUR with that of symptomatic VUR.
• To evaluate the efficacy of routine voiding cystourethrography in early VUR detection.

Main Methods:

• Retrospective analysis of 1023 children diagnosed with primary VUR between 1973 and 1992.
• Focus on 166 asymptomatic children (210 renal units) undergoing routine voiding cystourethrography.
• Documentation of presenting symptoms, reflux grade, renal scarring, urinary tract infections (UTIs), and long-term outcomes including renal damage and progression.

Main Results:

• Among 166 asymptomatic children, presenting symptoms included enuresis, hypospadias, and undescended testis.
• High-grade reflux (IV-V) was noted in 16.2% and renal scarring in 16.7% of renal units.
• Despite no initial UTI history, 23.5% developed UTIs during follow-up; 52.7% of reflux cases resolved spontaneously, while 20% showed scarring progression. Gross renal damage occurred in 5.4%, with two progressing to end-stage renal disease.

Conclusions:

• The natural history of asymptomatic primary vesicoureteral reflux is comparable to symptomatic reflux.
• Routine voiding cystourethrography in pediatric urology clinics is essential for early detection of VUR.
• Early detection facilitates timely intervention to prevent severe renal sequelae such as end-stage renal disease.