@Article{Wawrocka2016,
journal="Klinika Oczna / Acta Ophthalmologica Polonica",
issn="0023-2157",
volume="118",
number="3",
year="2016",
title="Differential diagnosis of Norrie disease 
and X-linked familial exudative vitreoretinopathy (XL-FEVR) based on clinical and molecular evaluation",
abstract=" Background : Molecular analysis of the  NDP  gene to confirm and precise the clinical diagnosis in two patients with X-linked familial exudative vitreoretinopathy (XL-FEVR).  	 Material and methods : We report two patients from unrelated families with  NDP  gene mutations: a 14-month-old boy (p1) who was found to have severe exudative vitreoretinopathy and a 4-year-old boy with exudative vitreoretinopathy (p2). An extensive clinical examination of the probands, including slit-lamp examination, B-mode ultrasonography and magnetic resonance imaging was conducted, along with genetic analysis of  NDP  gene.  	 Results : Clinical findings in patient 1 included no light perception, total retinal detachment and hyperplastic primary vitreous in both eyes. The genetic analysis of the  NDP  gene enabled to identify the novel frameshift mutation c.222_c223insCG in p1 leading to the premature stop codon and production of aberrant norrin protein. In P2, clinical presentation included high myopia with astigmatism, unilateral fibrous bands and retinal detachment. Genetic testing revealed known point mutation c.362G>A leading to amino-acid alteration and improper protein.  	 Conclusions : Mutation screening of  NDP  gene identified two different mutations in this region, one of which has not been previously reported.",
author="Wawrocka, Anna
and Niedziela, Zuzanna
and Skorczyk-Werner, Anna
and Krawczynski, Maciej R.",
pages="231--234",
doi="10.5114/ko.2016.71710",
url="http://dx.doi.org/10.5114/ko.2016.71710"
}