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Evaluation of hematuria and proteinuria: how should a pediatrician proceed?
1Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9063, USA. Raymond.Quigley@UTSouthwestern.edu
Insights
Detecting blood or protein in urine can cause anxiety. While isolated findings are often benign, combined hematuria and proteinuria in children signal a higher risk of significant kidney disease, requiring careful evaluation.
Area of Science:
- Pediatric Nephrology
- Clinical Urinalysis
- Diagnostic Evaluation
Background:
- Hematuria and proteinuria in children can cause significant parental anxiety.
- A broad differential diagnosis exists for these urinalysis findings.
- Pediatricians often face challenges in determining the necessity of exhaustive investigations.
Purpose of the Study:
- To review the primary causes of hematuria and proteinuria in pediatric patients.
- To outline a rational diagnostic approach for these conditions in children.
- To provide guidance on evaluating urinary abnormalities in the pediatric population.
Main Methods:
- Review of recent studies on mass screenings of school-aged children.
- Analysis of outcomes for children with isolated or combined hematuria and proteinuria.
- Correlation of urinalysis findings with clinical history and physical examination.
Main Results:
- Most children with isolated hematuria or proteinuria exhibited benign conditions.
- Children presenting with both hematuria and proteinuria demonstrated a greater prevalence of significant kidney disease.
- Urinalysis, history, and physical examination are often sufficient for diagnosis.
Conclusions:
- A focused work-up can rule out significant renal disease in most pediatric cases.
- Combined hematuria and proteinuria in children significantly elevates the probability of underlying renal pathology.
- Referral to a pediatric nephrology specialist is recommended when both findings are present.
Purpose Of Review:
Finding blood or protein in the urine of a patient can be the source of immense anxiety. The list of diseases that result in these findings is quite long. Thus, many pediatricians believe that an exhaustive investigation is necessary to be certain of the cause. The review will discuss the major causes of hematuria and proteinuria in the pediatric population, and discuss a rational approach to the evaluation of these conditions.
Recent Findings:
A number of recent studies have examined the results of mass screenings of school-age children and the final outcome of examination of children with hematuria and/or proteinuria. Most children with either isolated hematuria or isolated proteinuria had benign disease processes. Children with combined hematuria and proteinuria had a higher prevalence of significant kidney disease.
Summary:
The urinalysis combined with the history and physical examination should indicate the cause of hematuria and proteinuria in most cases. Significant renal disease can be ruled out with a minimal amount of work-up in most patients. The presence of hematuria and proteinuria together significantly increases the likelihood of significant renal disease and should prompt a referral to a specialist.
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