Clinical and genetic analysis of three children with 22q13 deletion syndrome
10.3760/cma.j.cn511374-20210426-00363
- VernacularTitle:三例22q13缺失综合征患儿的临床及遗传学分析
- Author:
Junyu WANG
1
;
Ruoyu DUAN
;
Huifang YAN
;
Yu ZHANG
;
Jiangxi XIAO
;
Jingmin WANG
Author Information
1. 北京大学第一医院，北京 100034
- Keywords:
Chromosome deletion;
Developmental delay;
Copy number variation
- From:
Chinese Journal of Medical Genetics
2022;39(7):680-684
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the clinical and genetic characteristics of three children with 22q13 deletion syndrome. .Methods:Clinical data were collected and copy number variations in the patients and their parents were detected by using array-based comparative genomic hybridization (aCGH) and copy number variation sequencing (CNV-seq). The DECIPHER, ClinGen, OMIM, PubMed and Gene Review databases were retrieved for pathogenicity analysis. .Results:The common phenotypes of the three children have included variable global developmental delay, among which speech delay was the most obvious. Patient 1 had abnormalities of corpus callosum shown by magnetic resonance imaging. Patient 2 had dental crowding, pale skin, thick palms, hypotonia, and other facial features. Patient 3 had the mildest symptoms including language dysfunction, which has caught up with the development and improved significantly. All of the three children had harbored de novo deletions of 22q13.33q13.33 region, which spanned 0.84 Mb, 8.70 Mb and 0.90Mb and involved 37, 126, and 34 genes, respectively.Conclusion:Above finding has enriched the clinical and genetic characteristics of 22q13 deletion syndrome and laid a foundation for genetic counseling and prenatal diagnosis.
