Nephronophthisis (NPHP), a heterogeneous ciliary dysfunction, or as named renal ciliopathy, is a disease causing cystic kidneys or renal cystic dysplasia, and the most common genetic cause of chronic renal failure in the first two decades of life [11–13]. Three clinical variants have been recognised; infantile, juvenile and adolescent types, depending on the age of onset of the manifestations and on the causative genes.The median age of onset varied, being 1, 13 and 19 years respectively [13,14]. The juvenile variant is the most common form of NPHP, it constitutes 5–10% of ESRF in affected children [15]. Furthermore, NPHP is frequently associated with a broad spectrum of extra-renal manifestations, constituting different clinico-pathological disorders, depending on the type of the mutated genes. Hence, molecular analysis of the relevant gene is important for confirmation of the clinical diagnosis and for providing effective genetic counselling.