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Updated: Jul 16, 2026

Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
What's new in karyotyping? The move towards array comparative genomic hybridisation (CGH)
Thomy J L de Ravel1, Koen Devriendt, Jean-Pierre Fryns
1Centre for Human Genetics, University Hospitals Leuven, Herestraat 49, 3000 Leuven, Belgium. Thomy.deRavel@uz.kuleuven.ac.be
Abstract:
Molecular karyotyping by array comparative genomic hybridisation (array CGH) has doubled the detection rate of pathogenic chromosomal imbalances in patients. This has been possible by increasing the resolution level from the 5 Mb obtained using the conventional karyotype to as low as 100 kb by array technology. Moreover, the technology revealed that over 12% of the human genome includes sub-microscopic benign copy number variable regions. These new findings have implications in genetic counselling and patient management.
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