Nephronophthisis (NPHP), the most frequent genetic cause of renal failure in children, is an autosomal recessive cystic kidney disease in childhood or adolescence. The onset is typically marked by polydipsia and polyuria as a result of a defect in urine concentration. Additional findings include small-to-normal-sized hyperechogenic kidneys with reduced corticomedullary differentiation on abdominal ultrasonography and histopathological alterations characterized by thickened or disrupted tubular basement membranes, tubular atrophy and dilation, interstitial fibrosis and occasional renal cysts. NPHP can also present with additional extrarenal manifestations, including retinitis pigmentosa (Senior-Loken syndrome, Bardet-Biedl sydnrome, Alstrom syndrome), liver fibrosis, cerebellar vermis hypoplasia (Joubert syndrome), and multiple developmental and neurologic abnormalites (Meckel Gruber syndrome).
Our Nephronophthisis Panel includes sequence analysis of the following 13 genes: NPHP1, INVS, NPHP3, NPHP4, IQCB1, CEP290, GLIS2, RPGRIP1L, NEK8, SDCCAG8, TMEM67, TTC21B, XPNPEP3.
Any gene in the Nephronophthisis Panel can also be ordered individually. Please contact us directly for cost and CPT code information.