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Published on: September 15, 2017
X-linked Adrenal Hypoplasia Congenita Patients Exhibiting Phenotypic Variability
Insights
X-linked adrenal hypoplasia congenita (X-AHC) is a rare genetic disorder. This study identifies a novel NR0B1 gene variant causing X-AHC with varied symptoms, including normal pubertal development in some cases.
Area of Science:
- Genetics
- Endocrinology
- Pediatrics
Background:
- X-linked adrenal hypoplasia congenita (X-AHC) is a hereditary disorder.
- It results from pathogenic NR0B1 gene variants, leading to primary adrenal insufficiency and hypogonadotropic hypogonadism.
- Four male patients from three families were diagnosed with X-AHC.
Background:
X-linked adrenal hypoplasia congenita (X-AHC) is a hereditary disease caused by pathogenic NR0B1 variants which result in primary adrenal insufficiency and hypogonadotropic hypogonadism. We report four male patients diagnosed with X-AHC from three maternally-related families.
Method:
Genetic testing used next-generation sequencing (Cases 1 and 3) or Sanger sequencing (Cases 2 and 4).
Results:
All patients harbored a novel pathogenic variant of the NR0B1 gene (c.94_113del, p.Thr32Leufs*). Cases 1 and 2 displayed acute onset neonatal congenital adrenal insufficiency and had hypogonadotropic hypogonadism. In contrast, cases 3 and 4 experienced delayed adrenal insufficiency and demonstrated normal pubertal development.
Conclusions:
Although pubertal development in X-AHC is diverse, reports of normal pubertal development are scarce. We report a novel NR0B1 variant with diverse manifestations.
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