2.The first report the results of this study have brought new insight into genetic of the NPHS2 gene in children of Vietnam patients The results of mutation at 4 exons (from exon 1 to exon 4) of NPHS2 gene in 140 children with idiopathic nephrotic syndrome (94 patients with steroid resistant idiopathic nephrotic syndrome and 46 patients with steroid sensitive idiopathic nephrotic syndrome).