A X-linked condition characterized by underdevelopment of the adrenal gland and adrenal insufficiency caused by mutation(s) in the NR0B1 gene, resulting in decreased activity of the nuclear receptor protein DAX1, which may be associated with hypogonadotropic hypogonadism. The disease is Monarch Disease Ontology entry MONDO_0010264 (X-linked adrenal hypoplasia congenita). Also known as: X-linked congenital adrenal hypoplasia, adrenal hypoplasia, congenital, X-linked recessive, congenital adrenal hypoplasia.