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Genome Integr. 2019 May 24;10:1. doi: 10.4103/genint.genint_4_18. eCollection 2019.

A Child with Partial Trisomy 4 (q26 - qterminal) Resulting from Paternally Inherited Translocation (4:18) Associated with Multiple Congenital Anomalies and Death.

Author information

1
Molecular Stress and Stem Cell Biology Group, School of Biotechnology, KIIT University, Bhubaneswar, Odisha, India.
2
Department of Paediatrics, Kalinga Institute of Medical Sciences, KIIT University, Bhubaneswar, Odisha, India.
3
Division of Cytogenetics, inDNA Life Sciences Private Limited, Bhubaneswar, Odisha, India.
4
Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.

Abstract

Parental balanced reciprocal translocations can result in partial aneuploidy in the offspring due to unbalanced meiotic segregation during gametogenesis. Herein, we report the phenotypic and cytogenetic characterization in a 9-day-old male child with partial trisomy of chromosome 4. Karyotyping of the proband and parents was performed along with multicolor fluorescence in situ hybridization (mFISH) of paternal chromosomes. Conventional cytogenetic analysis by karyotyping showed 47,XY,der(18),t(4;18)(q26;q22),+4 in proband, and the paternal karyotype was found as 47,XY,der(18),t(4;18)(q26;q22). mFISH analysis on paternal chromosomal preparations confirmed both region and origin of the balanced translocation. In this study, karyotyping helped us to identify both numerical and structural anomalies in the proband, and mFISH helped us to confirm our cytogenetic findings. Therefore, cytogenetic screening of both partners is recommended before pregnancy to rule out or confirm the presence of any numerical or structural anomaly in one, both, or none of the partners.

KEYWORDS:

Balanced translocation; karyotyping; multicolor fluorescence in situ hybridization; omphalocele

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