De Novo Interstitial Deletion 13q33.3q34 in a Male Patient with Double Outlet Right Ventricle, Microcephaly, Dysmorphic Craniofacial Findings, and Motor and Developmental Delay

We describe a 6-year-old male, diagnosed at birth with double outlet right ventricle (DORV), anterior aorta, multiple ventricular septal defects, pulmonary stenosis, microcephaly and mildly dysmorphic craniofacial findings. Chromosomal analysis showed a normal male karyotype but on subsequent array comparative genomic hybridization (array CGH) analysis a de novo 2.5Mb loss in chromosome 13q at 13q33.3q34, together with an inherited gain at 4p12, were detected. The propositus underwent placement of a Blalock Taussig shunt and subsequently a Glenn and Fontan operation was performed. In this report we propose that COL4A1 and COL4A2 may be candidate genes for congenital heart disease (CHD) in individuals with a deletion in 13q within the 6Mb critical region for cardiac development proposed by Huang et al., [2012]. (c) 2015 Wiley Periodicals, Inc.