Abstract
We report a rare case of a 14-month-old male child who was referred for developmental delay. Clinical examination revealed a hypotonic infant with speech delay and no dysmorphic features. The banding cytogenetics revealed a small supernumerary marker chromosome. Upon silver staining, the marker showed the presence of satellite regions on either ends. Further, analysis using fluorescence in situ hybridization on marker chromosome revealed its origin from chromosome 15.
References
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Acknowledgements
We are grateful to the patient and his parents for their participation in this study and to Dr S. Sridharan and Dr A. Andal at KKCTH, Chennai, Tamil Nadu, India for their support and help in the successful completion of the study. We also thank Dr Sitaram Harihar at SRMIST, Kattankulathur for his selfless help which enabled to present this paper more fluently and clearly.
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Kumar, M.J., Gowrishankar, K., Hemagowri, V. et al. A de novo marker chromosome 15 in a child with isolated developmental delay. J Genet 99, 72 (2020). https://doi.org/10.1007/s12041-020-01231-9
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DOI: https://doi.org/10.1007/s12041-020-01231-9