A recurrent 1.71 Mb genomic imbalance at 2q13 increases the risk of developmental delay and dysmorphism

Authors


Yiping Shen, PhD, FACMG, Children's Hospital Boston, 300 Longwood Ave., FA901, Boston, MA 02115, USA.
Tel.: +1 617 355 3372;
fax: +1 617 730 0383;
e-mail: yiping.shen@childrens.harvard.edu

Abstract

Yu HE, Hawash K, Picker J, Stoler J, Urion D, Wu B-L, Shen Y. A recurrent 1.71 Mb genomic imbalance at 2q13 increases the risk of developmental delay and dysmorphism.

Whole genome profiling such as array comparative genomic hybridization has identified novel genomic imbalances. Many of these genomic imbalances have since been shown to associate with developmental delay, intellectual disability and congenital malformation. Here we identified five unrelated individuals who have a recurrent 1.71 Mb deletion/duplication at 2q13 (Human Genome Build 19: 111,392,197-113,102,594). Four of these individuals have developmental issues, four have cranial dysmorphism. Literature review revealed 14 more cases that had similar genomic imbalances at 2q13. Many of them had developmental delay and dysmorphism. Taken together, 93% and 63% of individuals with this genomic imbalance displayed impaired developmental skills and/or abnormal facial features respectively. This copy number variant (CNV) has not been reported in normal control databases. We, therefore, propose that CNV in this region is a risk factor for developmental delay and dysmorphism.

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