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Updated: Jun 28, 2026
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Chromosome Preparation From Cultured Cells
Published on: January 28, 2014
A Practical Guide to Chromosome Microarray Interpretation for Paediatricians
Zachary E McPherson1,2, Margit Shah1,2, Sarah Josephi-Taylor1,2
1Department of Clinical Genetics, Sydney Children's Hospitals Network, Westmead, Australia.
Journal of Paediatrics and Child Health
|June 27, 2026
Summary
General pediatricians can now better interpret chromosome microarray (CMA) results for neurodevelopmental disorders. This guide clarifies copy number variants (CNV) and streamlines referrals to clinical genetics.
Area of Science:
- Genetics
- Pediatrics
- Genomic Medicine
Background:
- Chromosome microarray (CMA) is frequently used by pediatricians for neurodevelopmental delay, autism, and congenital abnormalities.
- CMA has a diagnostic yield of 10-15% but interpreting copy number variants (CNV) can be complex.
- Practical guidelines for interpreting CMA results are currently lacking for general pediatricians.
Purpose of the Study:
- To provide general pediatricians with a practical guide for interpreting CMA results.
- To assist pediatricians in determining the clinical relevance of CMA findings.
- To guide pediatricians on when to refer patients to clinical genetics.
Main Methods:
- Discussing clinical indications and diagnostic yield of CMA for various conditions.
- Outlining pre-test counseling and result discussion strategies.
- Presenting a table for interpreting CMA results, including pathogenic CNVs, variants of uncertain significance, and incidental findings.
Main Results:
- The guide offers a structured approach to CMA interpretation, addressing different types of genetic findings.
- It covers management implications, segregation studies, and family planning considerations.
- It clarifies limitations of CMA and provides clear indications for referral to specialists.
Conclusions:
- Pediatricians require a better understanding of genetic testing, including CMA.
- A practical approach to ordering and interpreting CMA simplifies complex results.
- This guide aims to improve the management of genetic testing in pediatric care and optimize genetics referrals.
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