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<正>1临床资料 35岁女性,已婚,患慢性肾病2~3期,肾结石,2型糖尿病10余年,妇科超声提示:双角纵隔子宫。婚后多年不孕,于赤峰市妇产医院生殖中心采取试管婴儿助孕,单胎妊娠,规律产检。胚胎移植前夫妻双方均做过染色体核型分析,检测结果正常。孕12周进行胎儿颈后透明层厚度(nuchal translucency scan;NT)检查,未见异常。孕17+0周产检超声提示:胎儿右肾 相似文献
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目的:探讨21三体综合征产前筛查与产前诊断对减少出生缺陷,提高人口素质的重要意义。方法:通过对56例唐氏儿的产前筛查与产前诊断情况的回顾性分析,探讨怀有21三体综合征孕妇的产前筛查情况,从发病年龄、孕周及检测AFP、Free-β-HCG两种血清标记物的浓度方面来分析唐氏筛查对孕妇家庭及社会的重要意义。结果:56例唐氏儿行产前筛查的17例,未筛查的39例,占69.64%。唐氏儿可在任何生育年龄组发生。AFP、Free-β-HCG检测对唐氏筛查有重要意义。结论:21三体综合征产前筛查与产前诊断是减少出生缺陷的有效手段,要加强宣传,提高孕妇、家庭、社会的认识和需求。 相似文献
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刘某某,女,26岁,孕41周。于1988年10月30日临产急诊入院,娩出一男婴。新生儿体检:身长41Cm,头围28Cm,体重1700g,哭声微弱,皮肤有毳毛,枕骨突出,两眼距增宽,睑裂小,鼻梁细长,嘴小,高腭弓,下颌小,耳位低,耳廓畸形,颈短,乳头小,两乳距增宽,心肺听诊正常,腹软。外生殖器发育不良,阴茎短小,隐睾;左手腕关节屈 相似文献
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目的:探讨引物原位标记法(PRINS)结合经腹脐血穿刺,应用于脐血中期细胞快速产前诊断18号染色体数目异常的可行性。方法:B超监护下经腹采集胎儿脐血共16例,外周血34例,应用18号染色体特异性引物,标记分裂中期细胞18号染色体,PRINS结果与中期细胞染色体G带分析结果进行比较。结果:16例脐血中,PRINS检测2例为18号三体,34例外周血中,1例为18三体,与染色体核型分析一致。结论:PRINS是一种简便、快速、可靠的产前诊断染色体数目异常的临床检测方法,值得进一步研究与推广。 相似文献
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背景 22号染色体q13.3区域的缺失被认为与患者自闭症和智力障碍有关,现认为SHANK3基因是关键基因,但其他基因对疾病严重程度的贡献并不明确.目的 分析1例自闭症、癫痫且行为异常患儿的遗传学病因.方法 2018年北京大学第一医院接诊的1例因运动落后、行为异常就诊的6岁8个月男性患儿,应用G显带染色体核型分析、染色体微阵列分析(chromosomal?microarray?analysis,CMA)技术检测染色体变异,查阅数据库并文献分析,明确缺失片段和致病基因的意义.结果 患儿外周血G显带染色体核型分析显示22号染色体环状改变,CMA发现患儿22q13.3区域存在4.9?Mb微缺失.结论 患儿22q13.3微缺失包含关键基因SHANK3,为明确其病因和遗传咨询提供重要线索. 相似文献
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21—三体综合征,又称先天愚型、Do-wn 综合征、软白痴,是人类最常见的染色体疾病之一。国内报道的现患率为0.56~0.68‰。因其占智力低下患者的10~15%,在提高人口素质方面有重大意义,所以已成为当前医学遗传学研究的一个重要课题。现将我们经临床和细胞遗传学确诊为本综合征的34例报道如下:一、临床资料1.性别与年龄.34例中男21例,女13例,男女性别比例为1.6:1.年龄最大为10岁,最小为10天。年龄分布为:新生儿1例;婴儿(1月~1岁)18例;幼儿(2~3岁)4例;学龄前儿童4~6岁)9例,学龄儿童(7—14岁)2例.2.胎次.患儿为第1胎者18例,第2胎者7例,第三胎及以上者9例。患儿母亲既往有流产史者8例. 相似文献
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Yao Hong Xu Juchun Hu Hua Dong Yanling Wu Haixia Li Junnan Hu Bin Long Yang Liang Zhiqing Chang Qing 《第三军医大学学报》2012,34(2)
目的 探讨中、晚孕期孕妇产前诊断指征与胎儿染色体异常核型发生的关系,分析不同产前诊断指征胎儿染色体异常的发生率,为孕妇选择妊娠结局提供科学依据.方法 选择我院2006年8月至2011年4月经遗传咨询门诊明确的高危孕妇4 808例,年龄19~42岁,平均30.5岁.病例均进行了细胞培养染色体核型分析,培养成功率99.5%,诊断准确率100%;部分病例进行了FISH检查并经核型分析证实诊断准确;妊娠结局随访方式为电话、分娩医院病历采集等.结果 153例染色体异常核型中常染色体数目异常102例,其中21-三体73例(双胎之一21-三体2例)、18-三体22例、13-三体4例、9-三体及三倍体各1例;常染色体结构异常27例;性染色体数目异常15例;嵌合体9例.产前诊断指征依次为胎儿彩超异常、高龄、唐筛高风险、不良妊娠史、NT值增高、染色体平衡易位携带者.130例选择终止妊娠,23例选择继续妊娠.对已出生的20例新生儿随访仅发现1例源自母亲染色体平衡易位的婴儿表现为轻度智力障碍.结论 胎儿系统超声及胎儿超声心动图异常、高龄、唐氏筛查高危与胎儿染色体异常发生率密切相关,是否继续妊娠应综合染色体畸变的类型、遗传学规律及夫妇双方的生育情况作决定. 相似文献
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产前诊断染色体异常与妊娠结局的临床分析 总被引:1,自引:1,他引:0
目的探讨中、晚孕期孕妇产前诊断指征与胎儿染色体异常核型发生的关系,分析不同产前诊断指征胎儿染色体异常的发生率,为孕妇选择妊娠结局提供科学依据。方法选择我院2006年8月至2011年4月经遗传咨询门诊明确的高危孕妇4 808例,年龄19~42岁,平均30.5岁。病例均进行了细胞培养染色体核型分析,培养成功率99.5%,诊断准确率100%;部分病例进行了FISH检查并经核型分析证实诊断准确;妊娠结局随访方式为电话、分娩医院病历采集等。结果 153例染色体异常核型中常染色体数目异常102例,其中21-三体73例(双胎之一21-三体2例)、18-三体22例、13-三体4例、9-三体及三倍体各1例;常染色体结构异常27例;性染色体数目异常15例;嵌合体9例。产前诊断指征依次为胎儿彩超异常、高龄、唐筛高风险、不良妊娠史、NT值增高、染色体平衡易位携带者。130例选择终止妊娠,23例选择继续妊娠。对已出生的20例新生儿随访仅发现1例源自母亲染色体平衡易位的婴儿表现为轻度智力障碍。结论胎儿系统超声及胎儿超声心动图异常、高龄、唐氏筛查高危与胎儿染色体异常发生率密切相关,是否继续妊娠应综合染色体畸变的类型、遗传学规律及夫妇双方的生育情况作决定。 相似文献
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We report the unusual case of a dysmorphic child with global developmental delay secondary to a familial complex chromosomal rearrangement (CCR). His chromosomal analysis using G-banding and dual colour fluorescence in situ hybridisation with whole chromosome paint revealed a supernumerary marker chromosome as a result of malsegregation of a familial CCR involving chromosomes 7, 12 and 14. The balanced form of this familial CCR was also carried by the patient's mother and maternal grandmother, both of whom had a history of recurrent spontaneous abortions, as well as his maternal uncle, who was infertile. To the best of our knowledge, this is the first reported case of familial CCR involving chromosomes 7, 12 and 14. This case also highlights the importance of chromosomal analysis in children with dysmorphism and developmental delay as well as in adults who suffer from recurrent spontaneous abortions or infertility. 相似文献
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目的在体外受精-胚胎移植过程中,对高危夫妇进行胚胎种植前遗传学诊断以避免21三体综合征患儿的出生。方法常规激素替代治疗,对患者夫妇行胞母细胞质内单精子注射(ICSI),正常受精培养到第3天,对6~10细胞期胚胎活检1个细胞,利用荧光原位杂交技术(FISH)进行胚胎种植前遗传学诊断(PGD),挑选染色体数目正常的胚胎移植入患者子宫。结果共对8个胚胎进行PGD,7个有诊断结果者中6个为正常胚胎、1个为21三体胚胎。挑选3个胚胎移植,获得妊娠并产下一健康男婴。结论应用FISH对染色体数目异常的遗传疾病,如21三体综合征,进行胚胎种植前遗传学诊断是切实可行的。 相似文献
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N E Simpson L Dallaire J R Miller L Siminovich J L Hamerton J Miller C McKeen 《Canadian Medical Association journal》1976,115(8):739-748
A study of 1223 amniocenteses carried out during 1020 pregnancies in 990 women showed that 2nd-trimester amniocentesis at about 16 weeks' gestation is a safe, accurate and reliable procedure for the diagnosis of certain classes of genetic disease when it is monitored by ultrasound, performed by a trained obstetrician and carried out in a major health sciences centre. The percentage of fetal losses (4.7%) and neonatal deaths (0.5%) during the study was not greater than in control samples for women 35 years of age and older. The best results were obtained when needles of gauge 20 or 21 were used. The use of needles of gauge 19 or larger and more than two insertions during a single amniocentesis were associated with a significantly greater frequency of fetal loss than a second or even a third amniocentesis during the same pregnancy. For 39 fetuses (3.8%) a diagnosis of a genetic abnormality was made and 23 male fetuses were found to be potentially hemizygous for an X-linked gene. There were 51 therapeutic abortions as a result of the diagnosis. Sixty-six tests (5.4%) gave an inconclusive result and seven (0.6%) gave an erroneous diagnosis; five of the latter (two false-positives and three false-negatives) resulted from the alpha1-fetoprotein test for neural-tube defects and in two cases the sex was incorrectly determined. The frequency of all chromosome abnormalities was 1:20 when the mother's age was 40 years or more and 1:60 when the mother's age was between 35 and 39 years. When a mother had previously had a child with a chromosome abnormality the risk of recurrence of such an abnormality was 1:100 when the age of the mother was 35 years or more. 相似文献
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Mental retardation is defined by significant limitations in intellectual function and adaptive behavior that occur before 18 years of age.Many chromosomal diseases come with mental retardation.We reported two Chinese families with partial trisomy 9p and other chromosome partial monosomy,clinical features of mental retardation and mild facial and pinkie anomalies.In the family 1,we showed that the proband carried a trisomy 9p21.3→pter and monosomy 21q22.3→qter by using fluorescence in situ hybridization analysis.Molecular genetic analysis defined the precise breakpoint on chromosome 9p between markers D9S1846 and D9S171,an interval of about 2.9 Mb on 9p21.3,and the breakpoint on chromosome 21q between markers D21S1897 and D21S1446,a region of about 1.5 Mb on 21q22.3.In the family 2,a patient with trisomy 9p21.3→pter and monosomy 5p15.33→pter,and a de novo maternal balanced translocation between chromosomes 5 and 9 was identified in his mother.Cytogenetic and molecular genetic analysis defined the precise breakpoints on chromosome 9p21.3 and chromosome 5p15.33.Further clinical investigation found that any individual had no refractoriness eczema disease except the proband in this family.These results further implicate that trisomy 9p is associated with mental retardation,and that there may be key gene duplication on chromosome 9p21.3→9pter responsible for mental retardation and mild facial anomaly.This result has been applied successfully in prenatal diagnosis of the second family. 相似文献
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对曾育21三体综合征患儿者行胚胎种植前遗传学诊断获妊娠1例 总被引:3,自引:1,他引:2
目的 在体外受精-胚胎移植过程中,对高危夫妇进行胚胎种植前遗传学诊断以避免21三体综合征患儿的出生。方法 常规激素替代治疗,对患者夫妇行胞母细胞质内精子注射(ICSI),正常受精培养到第3天,对6-10细胞期胚胎活检1个细胞,利用荧光原位杂交技术(FISH)进行胚胎种植遗传学诊断(PGD),挑选染色体数目正常的胚胎移植入患者子宫。结果 共对8个胚胎进行PGD,7个有诊断结果者中7个为正常胚胎、1个为21三体胚胎。挑选3个胚胎移植,获得妊娠并产下一健康男婴。结论 应用FISH对染色体数目的遗传疾病,如21三体综合征,进行胚胎种植前遗传学诊断是切实可行的。 相似文献
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目的:检测复杂染色体重排断裂点区域是否隐藏有亚显微拷贝数变化,确定重排的复杂性,探讨微阵列比较基因组杂交在分子细胞遗传诊断中运用的可行性和优越性.方法:应用微阵列比较基因组杂交芯片对一被传统G显带和多色荧光原位杂交诊断为平衡复杂染色体重排(46,XX.t(4;5;15)(4pter→4q23::15q23→15qter;4qter→4q23::5p15→5qter;15pter→15q23::)dn)的胎儿进行全基因组高分辨率扫描和分析.结果:微阵列比较基因组杂交显示胎儿存在3个亚显微拷贝数变化:dup(5)(q13.2)(69274233-70622915,~1.35Mb),del(15)(q11.2)(18657188-20080135,~1.42Mb)和del(18)(p11.31-p11.23)(7069849-7567290,~0.49Mb),均定位于重排断裂点(4q23,5p15和15p23)以外的区域,与断裂点不相关.结论:被传统细胞遗传分析技术诊断为平衡染色体重排的病例会隐藏有亚显微拷贝数变化,且这些拷贝数变化并非一定定位于重排断裂点区域;对于检测和定位亚显微拷贝数变化,微阵列比较基因组杂交是一个非常强大和有效的工具. 相似文献
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1 病例资料
患者,女性,27岁,孕2产1,双胎妊娠16周.产前检查时发现异常,超声检查提示:双绒膜/双羊膜腔妊娠.其中,A胎儿小于正常孕周,超声估测为13周,胎盘重度增大且呈囊性;B胎儿大小接近正常孕周,胎盘形态基本正常. 相似文献
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微阵列比较基因组杂交分析18等臂双着丝粒染色体胎儿全基因组拷贝数变化 总被引:3,自引:1,他引:2
目的 了解18q等臂双着丝粒染色体[idic(18)(p11→qter)]胎儿全基因组拷贝数变化的情况,确定idic(18)(p11→qter)的结构和组成,探讨微阵列比较基因组杂交在分子细胞遗传诊断中运用的可行性和优越性.方法 运用微阵列比较基因组杂交芯片对一被传统G显带和荧光原位杂交诊断为idlc(18)(p11→qter)的胎儿进行全基因组高分辨率扫描和分析.结果 微阵列比较基因组杂交显示胎儿存在18p11.21→pter缺失、18p11.21→qter复制,断裂点位于12 104 527~12 145 199(距离18p端粒),确定idic(18)(p11→qter)是idic(18)(p11.21→qter).另外,还检测出了21个亚显微拷贝数变化.结论 与传统的细胞遗传分析方法相比,微阵列比较基因组杂交不仅能准确、高分辨率和高通量地检测出基因组拷贝数变化,还能高分辨率地确定拷贝数变化的断裂点. 相似文献