Journal of Autism and Developmental Disorders

, Volume 42, Issue 8, pp 1582–1591 | Cite as

Diagnostic Yield of Chromosomal Microarray Analysis in an Autism Primary Care Practice: Which Guidelines to Implement?

  • Susan G. McGrewEmail author
  • Brittany R. Peters
  • Julie A. Crittendon
  • Jeremy Veenstra-VanderWeele
Original Paper


Genetic testing is recommended for patients with ASD; however specific recommendations vary by specialty. American Academy of Pediatrics and American Academy of Neurology guidelines recommend G-banded karyotype and Fragile X DNA. The American College of Medical Genetics recommends Chromosomal Microarray Analysis (CMA). We determined the yield of CMA (N = 85), karyotype (N = 119), and fragile X (N = 174) testing in a primary pediatrics autism practice. We found twenty (24%) patients with abnormal CMA results (eight were clinically significant), three abnormal karyotypes and one Fragile X syndrome. There was no relationship between CMA result and cognitive level, seizures, dysmorphology, congenital malformations or behavior. We conclude that CMA should be the clinical standard in all specialties for first tier genetic testing in ASD.


Genetic testing guidelines Chromosomal microarray Karyotype Dysmorphology 



The author acknowledges Dan Coury, M.D., Medical Director for The Autism Treatment Network, a program of Autism Speaks, for his support in the idea generation for this work. This research received no financial support.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Susan G. McGrew
    • 1
    • 3
    Email author
  • Brittany R. Peters
    • 2
  • Julie A. Crittendon
    • 1
    • 3
  • Jeremy Veenstra-VanderWeele
    • 3
    • 4
  1. 1.Department of Pediatrics, Division of Developmental MedicineVanderbilt University Medical CenterNashvilleUSA
  2. 2.Department of PediatricsVanderbilt University Medical CenterNashvilleUSA
  3. 3.Vanderbilt Kennedy Center for Research on Human DevelopmentVanderbilt UniversityNashvilleUSA
  4. 4.Departments of Psychiatry, Pediatrics and PharmacologyVanderbilt University Medical CenterNashvilleUSA

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