中华围产医学杂志
中華圍產醫學雜誌
중화위산의학잡지
CHINESE JOURNAL OF PERINATAL MEDICINE
2014年
12期
822-825
,共4页
戚庆炜%郝娜%周京%刘俊涛%边旭明
慼慶煒%郝娜%週京%劉俊濤%邊旭明
척경위%학나%주경%류준도%변욱명
三体性%镶嵌现象%产前诊断%核型分析%原位杂交,荧光%羊膜腔穿刺术
三體性%鑲嵌現象%產前診斷%覈型分析%原位雜交,熒光%羊膜腔穿刺術
삼체성%양감현상%산전진단%핵형분석%원위잡교,형광%양막강천자술
Trisomy%Mosaicism%Prenatal diagnosis%Karyotyping%In situ hybridization,fluorescence%Amniocentesis
目的:总结妊娠中期羊水20-三体假性嵌合体的产前诊断及遗传咨询的特点。方法对1例妊娠中期羊水20-三体假性嵌合体病例及相关文献进行分析。结果孕妇31岁,妊1产0,妊娠16周时,母体血清学筛查提示胎儿21-三体风险值为1/200,于2012年9月妊娠18周行羊膜腔穿刺术。采用GLP13/GLP21/CSP18/CSPX/CSPY探针的羊水间期细胞荧光原位杂交(fluorescence in situ hybridization,FISH)分析未见异常信号,羊水细胞培养和染色体核型分析结果为47,XY,+20[7]/46,XY[9],三体细胞系占7/16。进一步行脐静脉穿刺,脐血染色体核型为46,XY。对羊水间期细胞行D20Z1(20p11.1-q11.1)和D20S1157/20QTEL14(20per/qter)探针的 FISH 分析,各个探针在所有细胞中均只出现2个信号。妊娠24周行系统胎儿超声检查未见异常。综合分析上述情况,考虑该20-三体嵌合体为假性嵌合体。孕妇及其家属决定继续妊娠,至妊娠39周经阴道分娩一男性活婴,儿科体格检查未见异常。该婴儿随访至生后7个月,外观及发育未见异常。取该婴儿外周血查染色体核型为46,XY,同时取其口腔颊黏膜脱落细胞行D20Z1、D20S1157/20QTEL14探针的间期FISH分析,在所有细胞中均只出现2个信号,进一步证实产前诊断的结果。结论对羊水20-三体嵌合体需进行充分评估,对孕妇及配偶进行充分的产前咨询。间期FISH对评估嵌合体具有重要价值。产后应对多种组织行染色体核型分析或间期FISH的复核。
目的:總結妊娠中期羊水20-三體假性嵌閤體的產前診斷及遺傳咨詢的特點。方法對1例妊娠中期羊水20-三體假性嵌閤體病例及相關文獻進行分析。結果孕婦31歲,妊1產0,妊娠16週時,母體血清學篩查提示胎兒21-三體風險值為1/200,于2012年9月妊娠18週行羊膜腔穿刺術。採用GLP13/GLP21/CSP18/CSPX/CSPY探針的羊水間期細胞熒光原位雜交(fluorescence in situ hybridization,FISH)分析未見異常信號,羊水細胞培養和染色體覈型分析結果為47,XY,+20[7]/46,XY[9],三體細胞繫佔7/16。進一步行臍靜脈穿刺,臍血染色體覈型為46,XY。對羊水間期細胞行D20Z1(20p11.1-q11.1)和D20S1157/20QTEL14(20per/qter)探針的 FISH 分析,各箇探針在所有細胞中均隻齣現2箇信號。妊娠24週行繫統胎兒超聲檢查未見異常。綜閤分析上述情況,攷慮該20-三體嵌閤體為假性嵌閤體。孕婦及其傢屬決定繼續妊娠,至妊娠39週經陰道分娩一男性活嬰,兒科體格檢查未見異常。該嬰兒隨訪至生後7箇月,外觀及髮育未見異常。取該嬰兒外週血查染色體覈型為46,XY,同時取其口腔頰黏膜脫落細胞行D20Z1、D20S1157/20QTEL14探針的間期FISH分析,在所有細胞中均隻齣現2箇信號,進一步證實產前診斷的結果。結論對羊水20-三體嵌閤體需進行充分評估,對孕婦及配偶進行充分的產前咨詢。間期FISH對評估嵌閤體具有重要價值。產後應對多種組織行染色體覈型分析或間期FISH的複覈。
목적:총결임신중기양수20-삼체가성감합체적산전진단급유전자순적특점。방법대1례임신중기양수20-삼체가성감합체병례급상관문헌진행분석。결과잉부31세,임1산0,임신16주시,모체혈청학사사제시태인21-삼체풍험치위1/200,우2012년9월임신18주행양막강천자술。채용GLP13/GLP21/CSP18/CSPX/CSPY탐침적양수간기세포형광원위잡교(fluorescence in situ hybridization,FISH)분석미견이상신호,양수세포배양화염색체핵형분석결과위47,XY,+20[7]/46,XY[9],삼체세포계점7/16。진일보행제정맥천자,제혈염색체핵형위46,XY。대양수간기세포행D20Z1(20p11.1-q11.1)화D20S1157/20QTEL14(20per/qter)탐침적 FISH 분석,각개탐침재소유세포중균지출현2개신호。임신24주행계통태인초성검사미견이상。종합분석상술정황,고필해20-삼체감합체위가성감합체。잉부급기가속결정계속임신,지임신39주경음도분면일남성활영,인과체격검사미견이상。해영인수방지생후7개월,외관급발육미견이상。취해영인외주혈사염색체핵형위46,XY,동시취기구강협점막탈락세포행D20Z1、D20S1157/20QTEL14탐침적간기FISH분석,재소유세포중균지출현2개신호,진일보증실산전진단적결과。결론대양수20-삼체감합체수진행충분평고,대잉부급배우진행충분적산전자순。간기FISH대평고감합체구유중요개치。산후응대다충조직행염색체핵형분석혹간기FISH적복핵。
Objective To investigate the prenatal diagnosis and prenatal genetic conselling of pseudomosaic trisomy 20. Methods One case of pseudomosaic trisomy 20 was analyzed and relative literatures were reviewed. Results A 31-year-old gravid 1, para 0 woman underwent amniocentesis at 18 weeks of gestation due to high risk of trisomy 21 during maternal serum screening in September, 2012. Interphase fluorescence in situ hybridization (FISH) of amniocytes with probes GLP13/GLP21/CSP18/CSPX/CSPY showed a normal result, while cytogenetic analysis of cultured amniocytes revealed a karyotype of 47,XY,+20[7]/46,XY[9]. The level of trisomy in the cultured amniocytes was 7/16. Cordocentesis revealed a karyotype of 46,XY in cultured cord blood cells. Interphase FISH analysis was performed using the probes D20Z1 (20p11.1-q11.1) and D20S1157/20QTEL14 (20 per/qter). Each probe showed two signals in all uncultured amniocytes. The prenatal ultrasound findings were unremarkable. The mosaicism was considered to be pseudomosaicism. After genetic counseling, the parents selected to continue the pregnancy. A healthy male baby was delivered at 39 weeks of gestation. Postnatal cytogenetic analysis revealed a karyotype of 46,XY in peripheral blood lymphocytes. Interphase FISH analysis of the uncultured buccal cast-off cells using the probes D20Z1 and D20S1157/20QTEL14 showed normal results in 100%cells. There was no phenotypic abnormality at the age of seven months. Conclusions When mosaic trisomy 20 is identified in amniocytes, further evaluation and genetic counseling are required. Interphase FISH of the uncultured amniocytes with a chromosome-specific probe is a useful tool for confirmation of the prenatal diagnosis of mosaicism. Genetic analysis of multiple tissues is required postnatally.