Vesicoureteral reflux and reflux nephropathy

Area of Science:

• Pediatric Urology
• Nephrology

Background:

• Primary vesicoureteral reflux (VUR) is the most frequent congenital urological abnormality in children.
• VUR is linked to a higher risk of urinary tract infection (UTI) and renal scarring, known as reflux nephropathy (RN).
• RN in children is typically diagnosed post-UTI (acquired) or during monitoring for antenatal hydronephrosis (congenital).

Purpose of the Study:

• To review the current understanding of primary VUR and its association with RN.
• To discuss the differing presentations and outcomes of RN in male and female children and adults.
• To highlight the known risk factors and controversial management strategies for VUR and RN.

Main Methods:

• Literature review of primary VUR, UTI, and RN in pediatric and adult populations.
• Analysis of factors contributing to acquired versus congenital RN.
• Discussion of current management options including prophylaxis, surgery, and surveillance.

Main Results:

• Acquired RN is more prevalent in female children, while congenital RN is more common in males.
• Adult male RN presentation differs from females, with males showing hypertension, proteinuria, and renal failure, and females experiencing recurrent UTIs.
• Risk factors for RN include VUR severity, recurrent UTIs, bladder-bowel dysfunction, young age, and delayed UTI treatment.

Conclusions:

• The distinct presentation of RN in pediatric males and females may explain adult clinical differences.
• Management of VUR remains controversial, with no definitive evidence-based guidelines for RN follow-up.
• Further research is needed to establish clear follow-up protocols for patients with RN.