目的报告1例罕见的复杂染色体重排(complex chromosomal rearrangements,CCR)的产前诊断病例,探讨细胞遗传及分子遗传技术对诊断CCR的应用价值。
方法选取2024年5月29日于西北妇女儿童医院就诊的1例孕妇为研究对象,对胎儿CCR联合应用细胞遗传及染色体拷贝数变异(copy number variation,CNV)检测技术确定其来源和结构。
结果胎儿染色体核型为46,XN,der(9)t(9;22;18)(p21;q13.3;q11.2),der(22)t(9;22;18)。CNV提示胎儿染色体22q13.31-q13.33存在3.06 Mb缺失致病,18q12.1-q23存在51.78 Mb重复,两处变异均为致病性变异。
结论传统细胞遗传学技术结合分子遗传学技术有助于对产前罕见CCR的准确识别及鉴定,为产前优生提供指导价值。
ObjectiveA rare prenatal diagnosis case of a complex chromosomal rearrangement (CCR) was reported. Furthermore, to explore the application value of cytogenetic and molecular genetic technology for diagnostic CCR.
MethodsOne pregnant woman attending Northwest Women’s and Children’s Hospital on 29 May 2024 was selected as the study object. Cytogenetic and chromosomal copy number variation (CNV) detection were used to determine its origin and structure for the fetal CCR.
ResultsThe fetal chromosome karyotype was 46, XN, der (9) t (9; 22; 18) (p21; q13.3; q11.2), der (22) t (9; 22; 18). CNV suggested pathogenic presence of a 3.06 Mb deletion in fetal chromosome 22q13.31-q13.33 and 51.78 Mb duplication in 18q12.1-q23, and both variants were pathogenic variants.
ConclusionsTraditional cytogenetic technology combined with molecular genetic technology is helpful for the accurate judgement and judegment of the rare prenatal CCR, and provides guiding value for prenatal eugenics.
凡凤妮,秦翠云,刘瑗,等. 罕见复杂染色体重排的产前诊断及遗传学分析1例[J]. 国际遗传学杂志,2025,48(01):53-58.
DOI:10.3760/cma.j.cn231536-20241017-00089版权归中华医学会所有。
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凡凤妮:数据整理、论文撰写;刘瑗:经费支持;王瑞、秦翠云:研究指导、论文修改

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