Cystic kidney disease: a primer

Area of Science:

• Nephrology
• Medical Genetics
• Pediatric Nephrology

Background:

• Renal cystic diseases present with diverse phenotypes across all age groups.
• Clinical features, imaging, and extrarenal manifestations aid in distinguishing these disorders.
• Context is crucial; solitary cysts in adults may differ from those in children.

Purpose of the Study:

• To review and categorize renal cystic diseases.
• To provide an overview of clinical characteristics, genetics, pathogenesis, diagnosis, and management.
• To present a diagnostic algorithm for kidney cysts.

Main Methods:

• Categorization of renal cystic diseases into inherited single-gene, syndromic, and non-genetic forms.
• Review of clinical characteristics, genetics, molecular pathogenesis, diagnosis, and management.
• Development of a clinical feature-based algorithm for distinguishing kidney cysts.

Main Results:

• Renal cystic diseases are classified into inherited single-gene (e.g., autosomal recessive polycystic kidney disease), syndromic (e.g., tuberous sclerosis complex), and non-genetic (e.g., simple kidney cysts) categories.
• Detailed insights into clinical presentation, genetic basis, pathogenesis, and diagnostic/management strategies are provided.
• A practical algorithm is proposed to aid in differentiating kidney cysts based on clinical findings.

Conclusions:

• Effective management of renal cystic diseases requires understanding their varied presentations and underlying causes.
• The proposed classification and diagnostic algorithm can assist practitioners in evaluating and managing patients with kidney cysts.
• Further research into specific genetic and molecular mechanisms will refine diagnostic and therapeutic approaches.