A number sign (#) is used with this entry because of evidence that Antley-Bixler syndrome with disordered steroidogenesis (ABS1) is caused by homozygous or. Antley–Bixler syndrome, also called trapezoidocephaly-synostosis syndrome, is a rare, very severe autosomal recessive congenital disorder characterized by. This page from Great Ormond Street Hospital (GOSH) explains the causes, symptoms and treatment of Antley-Bixler syndrome and where to get help.

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Chromosomes are found in the nucleus of all body somatic cells. For example, physical therapy is typically recommended to help improve the range of movement at certain joint contractures. Carpenter Syndrome is a form of craniosynostosis, marked by the premature closure of the bones of the skull resulting in an abnormally shaped head.

PTH1R Jansen’s metaphyseal chondrodysplasia. Biochemical diagnosis of Antley-Bixler syndrome by steroid analysis. Some patients with POR mutations have died unexpectedly without a clear explanation, and Reardon et al.

This gene regulates encodes the production of a protein known as a fibroblast growth factor receptor FGFR. By using this site, you agree to the Terms of Use and Privacy Policy.

The steroid excretion pattern was consistent and distinctive in all 9 patients, and was significantly different from that measured in controls p less than 0. Antley-Bixler syndrome is a very rare disorder characterised by craniosynostosis with midface hypoplasia, radiohumeral amtley, femoral bowing and joint contractures.

However, in other affected individuals, Antley-Bixler Syndrome is thought to be caused by spontaneous sporadic mutations of a gene known as FGFR2 that may be transmitted as an autosomal dominant trait in subsequent generations.


Antley–Bixler syndrome

The documents contained in this web site are presented for information purposes only. Intellectual development is variable.

Other features may include down- slanting eyes, a flattened syndrrome, low-set eyes, and an usually small jaw. Type 2 Antley-Bixler can thus be accompanied by sexual ambiguity, but this is not a compulsory finding. The characteristic manifestations include craniosynostosis, radiohumeral synostosis, midface hypoplasia, joint contractures and arachnodactyly.

Metaphyseal dysplasia Jansen’s metaphyseal chondrodysplasia Schmid metaphyseal chondrodysplasia.

Orphanet: Antley Bixler syndrome

wyndrome Comparisons may be useful for a differential diagnosis: Fluconazole-induced congenital anomalies in three infants. A flat face with widely spaced eyes and a small jaw may also be found in children with this disorder. Poddevin F, et al.

This disorder is also known as Acrocephalopolysyndactyly Type II. In the absence of POR, environmental toxins and drugs that are usually metabolized to benign products by hepatic P enzymes may achieve teratogenic concentrations.

X-linked ichthyosis Antley—Bixler syndrome. In addition, certain joints may become permanently flexed or extended in fixed postures joint contracturesresulting in restricted movements.

Summary and related texts.

Rare Disease Database

Acrocephalosyndactyly Syndromes are rare disorders of infancy congenital that are characterized by a pointed head caused by the premature closure of the cranial sutures of the skull. Webbed fingers or toes syndactyly and other abnormalities of the thumbs or big toes may also occur. Research on birth defects and their causes is ongoing. Osteochondroma osteochondromatosis Hereditary multiple exostoses. Antley-Bixler syndrome with genital anomalies and disordered steroidogenesis.

Such treatment may require the coordinated efforts of a team of medical professionals who may need to systematically and comprehensively plan an affected child’s treatment.


In individuals with Antley-Bixler Syndrome, treatment may include surgical repair of malformations. J Pediatr Orthop ; 8: Unfortunately, it is not free to produce. Antley-Bixler syndrome from a prognostic perspective: Fluconazole, which acts on a fungal cytochrome P system, has been implicated in this fashion Aleck and Bartley, In some affected infants, a bony or thin layer of tissue may block the passageway between the nose and throat choanal stenosis or atresialeading to difficulties breathing.

Symptoms of the following disorders can be similar to those of Antley-Bixler Syndrome.

Evidence for digenic inheritance in some cases of Antley-Bixler syndrome? Obesity and heart anomalies may also occur. In Kleeblattschadel Deformity, a type of Craniosynostosis, there is premature closure of multiple or all bones of the skull.

Crouzon Disease is a rare inherited disorder characterized by the premature closure of the bones of the skull craniosynostosis accompanied by unusual facial features, mental retardation, and disturbances in vision and hearing. Detailed information Professionals Clinical genetics review English The implications of these findings are unknown.

OMIM is intended for use primarily by physicians and other professionals concerned with genetic disorders, by genetics researchers, and by advanced students in science and medicine. Antley Bixler syndrome www. Antley-Bixler syndrome in sisters: Eur J Pediatr ; The gene that encodes the fibroblast growth factor receptor-2 protein has been mapped to the long arm q of chromosome 10 10q Chun K, et al.