产前识别一个反向重复的13q标记染色体与一个新中心染色体
Liselot van der Laan1, Daniel R Hoekman1, Esther J Wortelboer1
1Department of Human Genetics, Amsterdam Reproduction and Development Research Institute, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands.
Molecular cytogenetics
|November 29, 2023
概括
一个罕见的标志性染色体,13q与新中心体的反向重复,在一个患有先天异常的胎儿中被发现. 尽管正常的非侵入性产前检测结果出现了这种情况.
科学领域:
- 产前遗传学和诊断 产前遗传学和诊断
- 人类遗传学和基因组学
- 胎儿医学和子宫内科.
背景情况:
- 非侵入性产前检测 (NIPT) 是一个常见的查工具,用于胎儿动脉.
- 罕见的染色体异常可以通过标准的NIPT查错过.
- 标记性染色体,特别是带有新中心体的染色体,代表复杂的遗传事件.
研究的目的:
- 报告一种通过胆囊取样本 (CVS) 识别的标记染色体的罕见病例.
- 为了描述标记性染色体的遗传构成:13q31.1-q34的反向重复与一个新中心分子.
- 为了突出复杂遗传病例中NIPT和CVS发现之间的差异.
主要方法:
- 对胆 ?? 囊样本 (CVS) 的遗传分析.
- 型化和潜在的染色体微阵列分析 (CMA) 用于详细表征.
- 遗传发现与胎儿表型 (多种先天性异常) 的相关性.
主要成果:
- 一个小标记染色体的识别.
- 标记性染色体的特征是13q31.1q34 (13q31.1→qter) 的反向重复与一个活跃的新中心体.
- 胎儿出现了多种先天性异常.
结论:
- 这一案例强调了CVS在怀疑胎儿异常的情况下的重要性,即使在正常的NIPT之后.
- 罕见的染色体重排,例如与新中心体的反向重复,可以导致显著的先天性异常.
- 准确的遗传诊断对于了解预后和遗传咨询至关重要.
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