Array comparative genomic hybridization detection of a de novo 4q21.21-q22.1 deletion in a child with severe growth retardation
Journal: Zhonghua Yi Xue Yi Chuan Xue Za Zhi = Zhonghua Yixue Yichuanxue Zazhi = Chinese Journal Of Medical Genetics
Published:
Abstract
Objective: To analyze a child with developmental delay, severe mental retardation, speech delay and muscular hypotonia.
Methods: The karotypes of the child and her parents were analyzed with G-banding analysis. Their genome DNA was also analyzed with array comparative genomic hybridization (array-CGH).
Results: No karyotypic abnormality was detected at cytogenetic level. However, array-CGH has identified a de novo 4q21.21-q22.1 deletion in the child, which has a size of 12.1 Mb.
Conclusions: The de novo interstitial 4q21.21-q22.1 deletion probably underlies the main clinical manifestation in the child. Array-CGH is useful for diagnosing children with multiple congenital anomalies with unclear etiology.
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