Metabolic Disorders and Recurrence in Pediatric Calcium Stone Formers

Overview

This study evaluated the association between metabolic abnormalities, patient and stone characteristics, and recurrence rates in pediatric calcium stone formers. Among 80 analyzed patients, metabolic abnormalities were common and linked to specific stone features and recurrence risk.

Background

Pediatric urolithiasis is increasingly recognized worldwide, with calcium oxalate stones comprising the majority of cases. Children with stones often have metabolic abnormalities and urinary tract anomalies, contributing to high recurrence rates. Current guidelines recommend metabolic evaluation after stone removal, but 24-hour urine collection poses challenges, especially in young children. Identifying patients at highest risk for recurrence may optimize metabolic testing and management.

Data Highlights

Key Findings

• Over 50% of pediatric stone formers had metabolic abnormalities in serum or urine.
• Calcium oxalate stones were the predominant stone type in this cohort.
• Metabolic abnormalities correlated with specific stone characteristics such as volume and complexity.
• Higher recurrence rates were associated with presence of metabolic abnormalities and certain stone features.
• 24-hour urine collection was feasible but had limitations, including inadequate samples in some patients.
• Restricting metabolic evaluation to high-risk children may improve diagnostic yield and reduce costs.

Clinical Implications

Clinicians should consider comprehensive metabolic evaluation in pediatric calcium stone formers to identify underlying abnormalities contributing to recurrence. Tailoring metabolic testing to patients with high-risk stone and clinical features may optimize resource use and guide targeted prophylaxis. Early identification and management of metabolic disorders can reduce recurrence and improve outcomes.

Conclusion

Metabolic abnormalities are common and significantly associated with stone characteristics and recurrence in pediatric calcium stone formers. Focused metabolic evaluation in high-risk patients may enhance prevention strategies and reduce disease burden.

References

1. European Association of Urology Guidelines -- Pediatric Urolithiasis
2. American Urological Association Guidelines -- Pediatric Stone Disease
3. Mansoura University Study 2001-2022 -- Metabolic Disorders and Pediatric Calcium Stones