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J Autism Dev Disord. 2019 May;49(5):2184-2202. doi: 10.1007/s10803-019-03899-0.

A Novel Approach to Dysmorphology to Enhance the Phenotypic Classification of Autism Spectrum Disorder in the Study to Explore Early Development.

Author information

1
National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Mailstop E-87, Atlanta, GA, 30341, USA. sshapira@cdc.gov.
2
National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, 4770 Buford Hwy NE, Mailstop E-87, Atlanta, GA, 30341, USA.
3
Departments of Pediatrics and Genetics, University of North Carolina School of Medicine, Chapel Hill, NC, USA.
4
Departments of Pediatrics and Genetics, University of Colorado School of Medicine, Aurora, CO, USA.
5
McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, MD, USA.
6
Clinical Genetics Center, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.

Abstract

The presence of multiple dysmorphic features in some children with autism spectrum disorder (ASD) might identify distinct ASD phenotypes and serve as potential markers for understanding causes and prognoses. To evaluate dysmorphology in ASD, children aged 3-6 years with ASD and non-ASD population controls (POP) from the Study to Explore Early Development were evaluated using a novel, systematic dysmorphology review approach. Separate analyses were conducted for non-Hispanic White, non-Hispanic Black, and Hispanic children. In each racial/ethnic group, ~ 17% of ASD cases were Dysmorphic compared with ~ 5% of POP controls. The ASD-POP differential was not explained by known genetic disorders or birth defects. In future epidemiologic studies, subgrouping ASD cases as Dysmorphic vs. Non-dysmorphic might help delineate risk factors for ASD.

KEYWORDS:

Autism spectrum disorder; Birth defects; Dysmorphic features; Dysmorphology; Genetic disorders; Morphologic anomalies; Phenotypic classification; Race/ethnicity

PMID:
30783897
PMCID:
PMC6486433
[Available on 2020-05-01]
DOI:
10.1007/s10803-019-03899-0

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