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Consensus Statement: Chromosomal Microarray Is a First-Tier Clinical Diagnostic Test for Individuals with Developmental Disabilities or Congenital Anomalies

American journal of human genetics, 2010-05, Vol.86 (5), p.749-764 [Peer Reviewed Journal]

2010 The American Society of Human Genetics ;2015 INIST-CNRS ;Copyright (c) 2010 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved. ;Copyright University of Chicago, acting through its Press May 14, 2010 ;2010 The American Society of Human Genetics. Published by Elsevier Ltd. All right reserved. 2010 The American Society of Human Genetics ;ISSN: 0002-9297 ;ISSN: 1537-6605 ;EISSN: 1537-6605 ;DOI: 10.1016/j.ajhg.2010.04.006 ;PMID: 20466091 ;CODEN: AJHGAG

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Title:
Consensus Statement: Chromosomal Microarray Is a First-Tier Clinical Diagnostic Test for Individuals with Developmental Disabilities or Congenital Anomalies
Author: Miller, David T. ; Adam, Margaret P. ; Aradhya, Swaroop ; Biesecker, Leslie G. ; Brothman, Arthur R. ; Carter, Nigel P. ; Church, Deanna M. ; Crolla, John A. ; Eichler, Evan E. ; Epstein, Charles J. ; Faucett, W. Andrew ; Feuk, Lars ; Friedman, Jan M. ; Hamosh, Ada ; Jackson, Laird ; Kaminsky, Erin B. ; Kok, Klaas ; Krantz, Ian D. ; Kuhn, Robert M. ; Lee, Charles ; Ostell, James M. ; Rosenberg, Carla ; Scherer, Stephen W. ; Spinner, Nancy B. ; Stavropoulos, Dimitri J. ; Tepperberg, James H. ; Thorland, Erik C. ; Vermeesch, Joris R. ; Waggoner, Darrel J. ; Watson, Michael S. ; Martin, Christa Lese ; Ledbetter, David H.
Subjects: Biological and medical sciences ; Child ; Chromosome Banding ; Chromosome Disorders - genetics ; Chromosomes ; Congenital Abnormalities - genetics ; Congenital diseases ; Cytogenetics ; Developmental disabilities ; Developmental Disabilities - genetics ; Fundamental and applied biological sciences. Psychology ; General aspects. Genetic counseling ; Genetic testing ; Genetics ; Genetics of eukaryotes. Biological and molecular evolution ; Humans ; Karyotyping ; Medical genetics ; Medical sciences ; MEDICIN ; MEDICINE ; Molecular and cellular biology
Is Part Of: American journal of human genetics, 2010-05, Vol.86 (5), p.749-764
Description: Chromosomal microarray (CMA) is increasingly utilized for genetic testing of individuals with unexplained developmental delay/intellectual disability (DD/ID), autism spectrum disorders (ASD), or multiple congenital anomalies (MCA). Performing CMA and G-banded karyotyping on every patient substantially increases the total cost of genetic testing. The International Standard Cytogenomic Array (ISCA) Consortium held two international workshops and conducted a literature review of 33 studies, including 21,698 patients tested by CMA. We provide an evidence-based summary of clinical cytogenetic testing comparing CMA to G-banded karyotyping with respect to technical advantages and limitations, diagnostic yield for various types of chromosomal aberrations, and issues that affect test interpretation. CMA offers a much higher diagnostic yield (15%–20%) for genetic testing of individuals with unexplained DD/ID, ASD, or MCA than a G-banded karyotype (∼3%, excluding Down syndrome and other recognizable chromosomal syndromes), primarily because of its higher sensitivity for submicroscopic deletions and duplications. Truly balanced rearrangements and low-level mosaicism are generally not detectable by arrays, but these are relatively infrequent causes of abnormal phenotypes in this population (<1%). Available evidence strongly supports the use of CMA in place of G-banded karyotyping as the first-tier cytogenetic diagnostic test for patients with DD/ID, ASD, or MCA. G-banded karyotype analysis should be reserved for patients with obvious chromosomal syndromes (e.g., Down syndrome), a family history of chromosomal rearrangement, or a history of multiple miscarriages.
Publisher: Cambridge, MA: Elsevier Inc
Language: English
Identifier: ISSN: 0002-9297
ISSN: 1537-6605
EISSN: 1537-6605
DOI: 10.1016/j.ajhg.2010.04.006
PMID: 20466091
CODEN: AJHGAG
Source: Cell Press Free Archives
GFMER Free Medical Journals
MEDLINE
PubMed Central

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Consensus Statement: Chromosomal Microarray Is a First-Tier Clinical Diagnostic Test for Individuals with Developmental Disabilities or Congenital Anomalies

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