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Clinical and Molecular Cytogenetic Characterisation of Children with Developmental Delay and Dysmorphic Features / Klinična in Molekularna Citogenetska Obravnava Otrok Z Razvojnim Zaostankom in Displastičnimi Znaki

Sara Bertok, Mojca Žerjav Tanšek, Primož Kotnik, Tadej Battelino, Marija Volk, Vanna Pecile, Lisa Cleva, Paolo Gasparini, Jernej Kovač, Tinka Hovnik
2015 Slovenian Journal of Public Health  
Introduction. Developmental delay and dysmorphic features affect 1 - 3 % of paediatric population. In the last few years molecular cytogenetic high resolution techniques (comparative genomic hybridization arrays and single-nucleotide polymorphism arrays) have been proven to be a first-tier choice for clinical diagnostics of developmental delay and dysmorphic features. Methods and results. In the present article we describe the clinical advantages of molecular cytogenetic approach (comparative
more » ... oach (comparative genomic hybridization arrays and single nucleotide polymorphism arrays) in the diagnostic procedure of two children with developmental delay, dysmorphic features and additional morphological phenotypes. Additionally, we demonstrate the necessity of fluorescent in situ hybridization utilisation to identify the localisation and underlying mechanism of detected chromosomal rearrangement. Conclusions. Two types of chromosomal abnormalities were identified and confirmed using different molecular genetic approaches. Comparative genomic hybridization arrays and single nucleotide polymorphism arrays are hereby presented as important methods to identify chromosomal imbalances in patients with developmental delay and dysmorphic features. We emphasize the importance of molecular genetic testing in patients' parents for the demonstration of the origin and clinical importance of the aberrations prior determined in the patients. The results obtained using molecular cytogenetic high resolution techniques methods are the cornerstone for proper genetic counselling to the affected families.
doi:10.1515/sjph-2015-0010 pmid:27646910 fatcat:xlsxl2agzzeedii4q3krlezl5a