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[Proteinuria]
Insights
Proteinuria in children is common. Isolated proteinuria requires assessment for persistence or postural relation; persistent cases need conservative management, with renal biopsy considered for concerning signs or persistent high levels.
Area of Science:
- Pediatric Nephrology
- Clinical Diagnostics
Context:
- Proteinuria is a frequent finding in pediatric patients.
- Initial evaluation focuses on identifying underlying renal or systemic diseases.
Purpose:
- To outline the diagnostic approach and prognostic indicators for pediatric proteinuria.
- To guide decisions regarding further investigations like renal biopsy.
Summary:
- Isolated proteinuria requires assessment of transience, persistence, and postural relation.
- Orthostatic or persistent asymptomatic proteinuria has an uncertain prognosis, necessitating conservative management.
- Proteinuria exceeding 1 g/l. in acute nephritic syndrome indicates potential poor prognosis and possible renal biopsy if persistent; in nephrotic syndrome, biopsy is reserved for steroid-resistant cases.
Impact:
- Provides a framework for managing pediatric proteinuria, potentially avoiding unnecessary invasive procedures.
- Aids clinicians in predicting outcomes and determining the need for renal biopsy based on proteinuria characteristics and associated clinical findings.
Abstract:
The finding of proteinuria in the pediatric age is a frequent phenomenon. Once detected, the immediate goal is to investigate other evidences of renal disease or its participation in systemic diseases. If proteinuria is an isolated finding, its transitoriness, persistence or relation with posture must be determined. Transitory proteinuria is a mild finding with good outlook; however, in patients with orthostatic or persistent asymptomatic proteinuria, the prognosis is uncertain; however, the measures taken must be conservative without restriction of physical activity and only in case of association to other signs, or finding of any change in renal function tests, the possibility of renal biopsy should be evaluated. The presence of proteinuria above 1 g/l. in a patient with acute nephritic syndrome, may be a sign of poor prognosis if it persists over one month and is indicative of renal biopsy. If this same degree of proteinuria is found in a nephrotic syndrome without hematuria or arterial hypertension, the necessity to practice renal biopsy is not indicated, except in the case it does not disappear following adequate treatment with corticosteroids.