Antley–Bixler syndrome | |
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Classification and external resources | |
Specialty | medical genetics |
ICD-10 | Q87.0 |
OMIM | 207410 201750 |
DiseasesDB | 32831 |
MeSH | D054882 |
Antley–Bixler syndrome, also called trapezoidocephaly-synostosis syndrome, is a rare, very severe autosomal recessivecongenital disorder characterized by malformations and deformities affecting the majority of the skeleton and other areas of the body.
Antley–Bixler syndrome presents itself at birth or prenatally. Features of the disorder include brachycephaly (flat forehead), craniosynostosis (complete skull-joint closure) of both coronal and lambdoid sutures, facial hypoplasia (underdevelopment); bowed ulna (forearm bone) and femur (thigh bone), synostosis of the radius (forearm bone), humerus (upper arm bone), and trapezoid (hand bone); camptodactyly (fused interphalangeal joints in the fingers), thin ilial wings (outer pelvic plate), and renal malformations.
Other symptoms, such as cardiac malformations, proptotic exophthalmos (bulging eyes), arachnodactyly (spider-like fingers), as well as nasal, anal, and vaginal atresia (occlusion) have been reported.
There are two distinct genetic mutations associated with the Antley–Bixler syndrome phenotype, which suggests the disorder may be genetically heterogeneous.