" /> Antley-bixler syndrome with genital anomalies and disordered steroidogenesis - CISMeF





Preferred Label : Antley-bixler syndrome with genital anomalies and disordered steroidogenesis;

Symbol : ABS1;

CISMeF acronym : ABS1;

Type : Phenotype, molecular basis known;

Description : The Antley-Bixler syndrome (ABS) is an exceptionally rare craniosynostosis syndrome characterized by radiohumeral synostosis present from the perinatal period. There is a wide spectrum of anomalies seen in ABS; other features include midface hypoplasia, choanal stenosis or atresia, multiple joint contractures, visceral anomalies (particularly of the genitourinary system), and impaired steroidogenesis (present only in patients with POR mutations). Mortality has been reported to be as high as 80% in the neonatal period, primarily due to airway compromise, and prognosis improves with increasing age (summary by McGlaughlin et al., 2010).;

Inheritance : Autosomal recessive;

Molecular basis : Caused by mutation in the cytochrome P450 oxidoreductase gene (POR, 124015.0001);

Laboratory abnormalities : Normal baseline cortisol; Blunted cortisol response to adrenocorticotropic hormone (ACTH); Elevated 17-hydroxyprogesterone; Mildly elevated ACTH; Elevated progesterone; Elevated pregnenolone;

Prefixed ID : #201750;

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03/05/2025


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