Renal function and growth after antireflux surgery in children

Area of Science:

• Pediatric Urology
• Nephrology
• Surgical Outcomes

Background:

• Vesico-ureteral reflux (VUR) is a common condition in children, potentially leading to kidney damage.
• Antireflux surgery aims to correct VUR and prevent further renal injury.
• Assessing surgical outcomes requires evaluating renal function, scarring, and growth.

Purpose of the Study:

• To evaluate the outcomes of antireflux surgery in children with VUR.
• To assess the impact of surgery on renogram parameters, kidney scarring, and renal growth.

Main Methods:

• Retrospective study of 39 children (65 renal units) undergoing antireflux surgery.
• Analysis of renogram T max, renal scarring, and renal growth (renal ratio) pre- and post-operatively.
• Long-term follow-up (mean 3 years, 1 month) for renal growth assessment.

Main Results:

• Significant improvement in renogram T max in 78.5% of renal units, attributed to reduced back pressure.
• Minimal improvement in kidney scarring observed in only 7.3% of scarred kidneys.
• Post-operative renal growth was variable: 1 of 12 small kidneys normalized, 6 showed normal growth curves, and 4 of 26 initially normal kidneys became small.

Conclusions:

• Antireflux surgery effectively improves renal function (T max) in pediatric VUR by alleviating obstruction.
• The impact on pre-existing kidney scarring is limited.
• Renal growth post-surgery is inconsistent, with some small kidneys showing catch-up growth and some normal kidneys decreasing in size.