What is the most common nephrotic syndrome in children?

• A. Focal segmental glomerulosclerosis
• B. Minimal change disease
• C. Membranous nephropathy
• D. Alport syndrome

Answer: (B)

Minimal change disease is the most common nephrotic syndrome in children. It typically affects preschool to early school-age kids and presents with edema, hypoalbuminemia, and heavy proteinuria, while blood pressure is usually normal. The disease process shows subtle glomerular changes: light microscopy often appears normal, but electron microscopy reveals diffuse effacement of podocyte foot processes, and immunofluorescence is nonspecific. This pattern underpins the classic clinical course: children respond very well to corticosteroids, with rapid remission of proteinuria and edema in most cases, though relapses are common. Because it is by far the most frequent cause of nephrotic syndrome in kids, and because the condition is characteristically steroid-responsive with minimal structural damage on biopsy, it stands out as the correct answer. Other conditions like focal segmental glomerulosclerosis, membranous nephropathy, and Alport syndrome have different typical presentations, ages, or biopsy findings and are less common causes of nephrotic syndrome in children.