Posterior urethral valves: long-term renal function consequences after transplantation

Area of Science:

• Pediatric Nephrology
• Urology
• Transplantation Immunology

Background:

• Posterior urethral valves (PUV) are a common cause of congenital lower urinary tract obstruction in male infants.
• Kidney transplantation is a life-saving option for children with end-stage renal disease due to PUV.
• Long-term outcomes of renal transplantation in children with PUV require further evaluation.

Purpose of the Study:

• To assess the long-term efficacy and graft survival of renal transplantation in pediatric patients with posterior urethral valves.
• To compare outcomes between children with PUV and a control group with other malformation uropathies.

Main Methods:

• Retrospective cohort study comparing 66 children with PUV to 116 control patients.
• Analysis of graft survival rates at 5 and 10 years post-transplantation.
• Evaluation of serum creatinine levels as an indicator of long-term graft function.

Main Results:

• Graft survival rates at 5 years were 69% for PUV and 72% for controls; at 10 years, 54% for PUV and 50% for controls (not statistically significant).
• A statistically significant increase in serum creatinine was observed at 10 years in the PUV group, indicating graft function deterioration.
• No significant increase in serum creatinine was noted in the control group.

Conclusions:

• Renal transplantation in children with posterior urethral valves demonstrates comparable long-term graft survival to other uropathies.
• Deterioration of graft function over time in PUV patients is likely associated with underlying lower urinary tract dysfunction.
• Further management strategies should consider the impact of lower urinary tract issues on transplanted kidney function.