New homozygous SPINK5 mutation, p.Gln333X, in a Turkish pedigree with Netherton syndrome.

Netherton syndrome (NS) is a rare autosomal recessive genodermatosis caused by loss-of-function mutations in the SPINK5 gene. The clinical features include congenital ichthyosis, trichorrhexis invaginata and atopy. In this study, we report a new homozygous SPINK5 mutation, p.Gln333X, responsible for NS in affected members of two closely related Turkish families, and provide an overview of the genotype-phenotype correlation in this condition.