What is the most common pediatric nephrotic syndrome and its typical treatment?

• A. Focal segmental glomerulosclerosis; ACE inhibitors
• B. Minimal change disease; typically steroid-responsive
• C. Membranous nephropathy; plasmapheresis
• D. Diabetic nephropathy; dietary protein restriction

Answer: (B)

Most pediatric nephrotic syndrome is caused by minimal change disease, a condition where the kidney’s filtration barrier is subtly damaged (podocyte foot-process effacement) without inflammation or immune complex deposits. This understanding explains why kids present with edema, heavy proteinuria, hypoalbuminemia, and often normal blood pressure, while kidney function remains preserved. The standout feature is how well this condition responds to steroids: a course of high-dose glucocorticoids (prednisone/prednisolone) typically induces remission within a couple of weeks, and the overall prognosis is excellent. Some children relapse and may need additional steroid courses, but long-term outcomes remain favorable.

The other options don’t fit the common pediatric pattern as well. Focal segmental glomerulosclerosis is a cause but is less common in children and tends to be more steroid-resistant. Membranous nephropathy is rare in the pediatric population and requires a different, more targeted approach in some cases. Diabetic nephropathy is not a typical pediatric nephrotic syndrome, occurring mainly after long-standing diabetes in adults.