Mandibulofacial dysostosis, microtia, and limb anomalies in a newborn: a new form of acrofacial dysostosis syndrome?
The acrofacial dysostoses (AFDs) are a heterogeneous group of disorders involving craniofacial dysostosis and limb anomalies. Depending on the type of limb defects, two major groups have been defined: Nager syndrome with predominant preaxial anomalies and Miller syndrome with postaxial malformations. Genomic copy number variation, a common type of genomic variability, can influence gene expression by disrupting coding sequences, perturbing long-range gene regulation, or altering gene dosage, and these effects could contribute to phenotypic variations or disease risk. We present a distinct AFD case with mandibulofacial dysostosis, microtia and limb malformations but without limb defects, which may represent a new form of AFD. To investigate the etiology of the phenotype, whole genomic high-resolution array comparative genomic hybridization analysis was carried out, revealing two cryptic duplications, 1p36.33 and 1q21.3-q22 duplications. Two genes, VWA1 and PYGO2, contained in the two duplications, respectively, are likely to be the candidate genes for the phenotype of our patient.
Zhang
Y
Y
Key Laboratory of Laboratory Medical Diagnostics, Chongqing Medical University, Ministry of Education, Chongqing 400016, PR China.
Dai
Y
Y
Liu
Y
Y
Ren
J
J
D000015:Abnormalities, Multiple / Q000235:genetics; D055028:Comparative Genomic Hybridization; D000013:Congenital Abnormalities / Q000235:genetics; D065817:Congenital Microtia; D003394:Craniofacial Dysostosis / Q000235:genetics*; D004423:Ear / Q000002:abnormalities; D006801:Humans; D007231:Infant, Newborn; D017880:Limb Deformities, Congenital / Q000235:genetics*; D008342:Mandibulofacial Dysostosis / Q000235:genetics*; D013577:Syndrome