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Smith-Lemli-Opitz Syndrome and Autism Spectrum Disorder

In addition to the association of autism spectrum disorder with specific heritable disorders (e.g., fragile X syndrome, phenylketonuria, chromosome 15q11-q13 duplication, and tuberous sclerosis), evidence for a genetic contribution includes increased recurrence risk in siblings; increased concordanc...

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Bibliographic Details
Published in:The American journal of psychiatry 2007-11, Vol.164 (11), p.1655-1661
Main Authors: Bukelis, Irena, Porter, Forbes D., Zimmerman, Andrew W., Tierney, Elaine
Format: Article
Language:English
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Summary:In addition to the association of autism spectrum disorder with specific heritable disorders (e.g., fragile X syndrome, phenylketonuria, chromosome 15q11-q13 duplication, and tuberous sclerosis), evidence for a genetic contribution includes increased recurrence risk in siblings; increased concordance in monozygotic compared to dizygotic twins; and occurrence of cognitive, language, and behavioral disturbances in close relatives (1). The association of autism spectrum disorder with physical or behavioral manifestations that warrant testing for Smith-Lemli-Opitz syndrome include the following; two-to-three toe syndactyly, ptosis, soft cleft palate/bifid uvula, failure to thrive or feeding difficulties, growth retardation, postnatal onset of microcephaly, hand or foot malformation, abnormal genitalia, hypotonia, severe sleep disturbance, self-injury with biting of the wrist or the thenar eminence, opisthokinesis, or a family history of developmental disabilities with physical dysmorphology.
ISSN:0002-953X
1535-7228
DOI:10.1176/appi.ajp.2007.07020315