Abstract
Steroidogenic factor 1 (SF1/AdBP4/FTZF1, NR5A1) is a nuclear receptor transcription factor that plays a critical role in different processes of sex development. Homozygous mutations in SF1 result in adrenal failure and complete testicular disgenesis in 46,XY individuals. According to recent studies heterozygous mutations in SF1 are associated with milder phenotype: they are found in children with 46,XY disorders of sex development (DSD) but with apparently normal adrenal structure and function. Here we present for the first time in Russian literature a case of SF1 deficiency. Molecular genetic analysis of NR5A1 gene revealed a novel heterozygous mutation c.951delC p.H317QfsX17. This clinical case demonstrates the importance of molecular genetic studies in DSD 46,XY, especially severe forms.
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