[Idiopathic nephrotic syndrome]

Area of Science:

• Pediatric Nephrology
• Internal Medicine
• Genetics

Background:

• Nephrotic syndrome (NS) is characterized by proteinuria, hypoalbuminemia, edema, and hyperlipidemia.
• Idiopathic nephrotic syndrome (INS) is the most frequent cause of NS in children, with an incidence of 1-4 per 100,000.
• INS can be triggered by infections, drugs, allergies, vaccinations, and malignancies, typically affecting children aged 2-7 years.

Purpose of the Study:

• To provide a comprehensive overview of idiopathic nephrotic syndrome in children.
• To discuss the diagnostic criteria, management, and prognosis of INS.
• To highlight the importance of steroid therapy and identify risk factors for steroid resistance.

Main Methods:

• Review of existing literature on idiopathic nephrotic syndrome in pediatric populations.
• Analysis of clinical presentation, diagnostic approaches, and treatment strategies.
• Evaluation of factors influencing steroid responsiveness and long-term outcomes.

Main Results:

• Most children (85-90%) with INS respond to initial corticosteroid treatment.
• Relapses are common, but the majority of patients continue to respond to steroids in subsequent courses.
• A small percentage (1-3%) of patients develop steroid resistance, posing a risk for end-stage kidney disease.

Conclusions:

• Idiopathic nephrotic syndrome is a manageable condition in most children with prompt steroid therapy.
• Close monitoring is essential to detect and manage steroid resistance and its complications.
• Further research into the underlying mechanisms of INS and steroid resistance is warranted.