Development of new renal scars: a collaborative study

Area of Science:

• Pediatrics
• Nephrology
• Radiology

Background:

• Renal scarring in children can result from urinary tract infections (UTIs).
• Factors influencing the development of new renal scars require further investigation.
• Understanding these factors is essential for effective prevention and management strategies.

Purpose of the Study:

• To analyze clinical data and serial radiographs of infants and children to identify factors contributing to renal scar development.
• To assess the incidence and extent of new renal scarring in a pediatric cohort.
• To evaluate the impact of delayed diagnosis, recurrent infections, and vesicoureteric reflux on renal scar formation.

Main Methods:

• Retrospective analysis of clinical data and serial radiographs from 74 children (66 girls, 8 boys) without duplex kidney or obstruction.
• Radiological assessment for the development of new renal scars.
• Correlation of scarring with factors such as age at scarring, history of urinary infection, vesicoureteric reflux, and management delays.

Main Results:

• New renal scars developed in 87 kidneys (74 previously normal, 13 previously scarred); extensive scarring occurred in 16 kidneys.
• Urinary infection was present in all children; diagnosis and treatment were delayed in 45, and 58 experienced recurrent infections.
• Vesicoureteric reflux was observed in 67 children, and social problems impacted management in 22.
• Thirty-four children were aged 5 or older when scarring occurred.

Conclusions:

• Early diagnosis, prompt and effective treatment, thorough investigation, and long-term supervision are critical for reducing renal scarring in children with UTIs.
• Children over the age of 5 remain susceptible to developing renal scars.
• Inadequate management, including delayed diagnosis and insufficient prophylaxis, contributes significantly to renal scar progression.