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Author Spotlight: Developing a Bedside Protocol for Kidney and Genitourinary Ultrasonography
Published on: June 21, 2024
Approach to simple kidney cysts in children
Katherine M Dell1, Erum A Hartung2
1Section On Pediatric Nephrology and Hypertension, Department of Pediatrics, Cleveland Clinic Children's, Case Western Reserve University, Cleveland, OH, USA. kmd8@case.edu.
Insights
Simple kidney cysts in children present diagnostic challenges. This review outlines their definition, epidemiology, and offers a framework for evaluation and monitoring, balancing diagnosis with practical considerations.
Area of Science:
- Pediatric Nephrology
- Urology
- Diagnostic Imaging
Background:
- Simple kidney cysts in children are found incidentally or may indicate underlying conditions like autosomal dominant polycystic kidney disease (ADPKD).
- Current guidelines for evaluating and monitoring pediatric simple kidney cysts are lacking.
- Prevalence estimates vary, influenced by referral patterns and imaging techniques.
Purpose of the Study:
- To define the epidemiology, clinical presentation, and natural history of simple kidney cysts in children.
- To identify clinical features suggesting diagnoses beyond simple cysts.
- To propose a framework for the evaluation and monitoring of pediatric simple kidney cysts.
Main Methods:
- Literature review of studies on pediatric kidney cysts.
- Analysis of diagnostic criteria and clinical presentations.
- Development of a management framework based on current evidence.
Main Results:
- Simple kidney cysts are relatively common, with variable reported prevalence.
- Distinguishing simple cysts from other cystic kidney diseases requires careful clinical assessment.
- A structured approach can guide diagnosis and management, minimizing unnecessary interventions.
Conclusions:
- A clear framework is needed to manage children with simple kidney cysts, addressing diagnostic uncertainty and parental concerns.
- Balancing thorough evaluation with the costs and inconvenience of repeated testing is crucial.
- This review provides evidence-based recommendations for pediatric kidney cyst management.
Abstract:
The finding of a simple kidney cyst in a child can pose a diagnostic and management challenge for pediatric nephrologists, urologists, and primary care providers. The reported prevalence varies from 0.22 to 1% in large ultrasonography-based series of more than 10,000 children each. The true prevalence, however, may be higher or lower, as factors such as variations in referral patterns, indications for ultrasonography, or technical considerations could impact prevalence rates. For many patients, simple kidney cysts may be found incidentally when imaging is performed for another indication. Although simple cysts can occur in children, they may also represent the first sign of autosomal dominant polycystic kidney disease (ADPKD) or other less common cystic kidney diseases. Definitive guidelines regarding the evaluation and monitoring of children with simple kidney cysts have not been established. The desire on the part of the practitioner and/or parents to establish a definitive diagnosis should be balanced with the cost and inconvenience of repeated imaging and visits with specialists. The goals of this review are to (1) outline the definition, epidemiology, clinical presentation, and natural history of simple kidney cysts in childhood; (2) describe clinical features that could suggest a diagnosis other than a simple kidney cyst; and (3) present a suggested framework for evaluating and monitoring of children with one or more simple kidney cysts.
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