The pediatric nephrotic syndrome spectrum: clinical homogeneity and molecular heterogeneity

Idiopathic nephrotic syndrome is the most common glomerular disorder of childhood. Recurrence of nephrotic syndrome immediately following renal transplantation is rapid, results in a high rate of graft loss, and represents the most severe form of nephrotic syndrome. This review discusses the molecular heterogeneity of pediatric nephrotic syndrome across the spectrum of disease activity. A schema is offered for a molecular approach to pediatric nephrotic syndrome, including immune-mediated and structural/genetic factors.