A syndrome of holoprosencephaly and postaxial polydactyly, associated with hydrocephalus, heart defect, adrenal hypoplasia, and other visceral malformations, has been observed in five unrelated children with normal chromosomes. Clinical overlap with lethal acrodysgenital dwarfism (Smith-Lemli-Opitz syndrome type II) and hydrolethalus syndrome is discussed. Recessive inheritance seems likely.

A syndrome of holoprosencephaly and postaxial polydactyly, associated with hydrocephalus, heart defect, adrenal hypoplasia, and other visceral malformations, has been observed in five unrelated children with normal chromosomes. Clinical overlap with lethal acrodysgenital dwarfism (SmithLemli-Opitz syndrome type II) and hydrolethalus syndrome is discussed. Recessive inheritance

Adrenal hypoplasia congenita (AHC) is a rare inherited disorder of the adrenal gland caused by deletion or mutation of the dosage-sensitive sex-reversal AHC critical region on the X chromosome, gene 1 (DAX1) gene. The DAX1 gene is expressed in the adrenal cortex, the pituitary gland, the hypothalamus, the testis, and the ovary. Most affected infants present with failure to thrive, salt wasting,...

Addison's disease may occur in infants with the adrenogenital syndrome, the adrenals being structurally intact and larger than norml. However, Addison's disease comparable with that occurring in adults also occurs in infants whose adrenal glands are hypoplastic or diseased. These infants fail to gain weight and are in a poor state of hydration despite a theoretically adequate caloric and fluid ...

DAX-1 (NR0B1) and SF-1 (NR5A1) are two nuclear receptor transcription factors that play a key role in human adrenal and reproductive development. Loss of DAX-1 function is classically associated with X-linked adrenal hypoplasia congenita. This condition typically affects boys and presents as primary adrenal insufficiency in early infancy or childhood, hypogonadotropic hypogonadism at puberty an...

X-linked adrenal hypoplasia congenita (AHC) is characterized by primary adrenal insufficiency and is frequently associated with hypogonadotropic hypogonadism (HH). The production of other pituitary hormones (adrenocorticotropic hormone [ACTH], growth hormone [GH], thyroid-stimulating hormone [TSH], and prolactin [PRL]) is usually normal. Mutations of the DAX-1 gene have been reported in patient...

Septo-Optic Dysplasia (SOD) is a heterogeneous condition defined by any combination of i) optic nerve hypoplasia, ii) hypopituitarism, and iii) midline brain anomalies such as agenesis of the corpus callosum and absence of the septum pellucidum. We encountered a Japanese girl with optic nerve hypoplasia, growth failure, precocious puberty, and mild developmental delay. Her optic nerve hypoplasi...