国际生殖健康/计划生育杂志2026，Vol.45Issue(4)：282-284,289,4.DOI:10.12280/gjszjk.20260027
染色体插入易位误判为平衡易位一例
A Case of Misdiagnosed Chromosomal Insertion Translocation as A Balanced Translocation
易嘉馨 1张娜 1陈育华 2叶蔚 1陈何莲 2谢缌颖 1王明蕊1
作者信息
- 1. 524000 广东省湛江市,广东医科大学附属医院妇产医学中心
- 2. 524000 广东省湛江市,广东医科大学附属医院检验医学中心
- 折叠
摘要
Abstract
We report a case of theoretically inconsistent results between the prenatal diagnosis and previous chromosomal karyotype analysis at Affiliated Hospital of Guangdong Medical University(our hospital).The previous previous karyotype analysis of peripheral blood from an outside hospital suggested 46,XX,t(1;5)(p36;q22)in the pregnant woman,and 46,XY,inv(Y)(p11q11)in her spouse.However,the amniotic fluid karyotype at our hospital was 46,XN,ins(1;5)(p33;q34q21).According to the theory of gamete segregation of reciprocal translocation carriers,if the previous diagnosis is translocation,it is theoretically difficult to explain the current fetal karyotype,considering that the results of previous chromosomal karyotype analysis in the pregnant woman could be biased.For further verification,the pregnant woman was suggested to higher-level hospital for high-resolution G-banding review,and the peripheral blood karyotype of the pregnant women was confirmed to be 46,XX,ins(1;5)(p32.2;q33.2q22),which was consistent with the results of amniotic fluid karyotype from our hospital.This case suggests that the conventional G-banding has limited resolution for complex or atypical chromosomal structural abnormalities,especially when complex rearrangements are involved.It is necessary to further conduct high-resolution banding to accurately locate break points and rearrangement types,in combination with theoretical knowledge,so as to avoid affecting genetic counseling based on wrong diagnosis.关键词
产前诊断/染色体畸变/核型分析/易位,遗传/诱变,插入Key words
Prenatal diagnosis/Chromosome aberrations/Karyotyping/Translocation,genetic/Mutagenesis,insertional引用本文复制引用
易嘉馨,张娜,陈育华,叶蔚,陈何莲,谢缌颖,王明蕊..染色体插入易位误判为平衡易位一例[J].国际生殖健康/计划生育杂志,2026,45(4):282-284,289,4.
