A child with transient proteinuria that resolves on repeat testing: what is the next step?

• A. No management indicated
• B. 24-hour urine collection
• C. ACE inhibitors
• D. Urine protein electrophoresis

Answer: (A)

Transient proteinuria in a child is often benign and can be due to non-kidney causes such as recent illness, fever, dehydration, or orthostatic proteinuria. When repeat testing shows that proteinuria has resolved, there is no ongoing disease process requiring treatment or further workup. The appropriate approach is reassurance and routine follow-up to confirm it remains absent.

If proteinuria had persisted on repeat testing, the next steps would involve quantifying protein excretion (for example, a urine protein-to-creatinine ratio or a 24-hour collection) to assess the degree of proteinuria and evaluate for possible nephrotoic or glomerular disease. Treatments like ACE inhibitors are reserved for persistent proteinuria associated with hypertension or nephrotic-range proteinuria, and urine protein electrophoresis is not indicated in a simple transient pediatric proteinuria unless there are additional red flags suggesting a monoclonal process.