11例t(11;22)(q23;q11)染色体平衡易位患者的临床与遗传学分析

目的 初步探讨非罗伯逊易位型复发性染色体易位t(11;22)(q23;q11)的发生机制及与不孕不育的关系.方法 染色体核型分析检测有不孕不育、不良生育史或胎儿出现多发畸形的11例患者,其中外周血10例(男3例,女7例),脐带血(产前诊断)1例.结果 患者染色体断裂位点相同,7例女性中,6例表现为反复自然流产和畸形儿生育史,1例为不孕;3例男性均表现为不育症,其中1例表现为无精子症,2例为精子数目减少和活力下降;产前诊断1例,染色体核型为47,XN,inv(9)(p11q13),+der(22)t(11;22)(q23.3;q11.2),即出现了染色体遗传物质不平衡,胎儿超声提示多发畸形.结论 t(11;22)(q23;q11)是一种很少见的复发性染色体易位,对其进行深入研究,有助于进一步认识t(11;22)所致的染色体畸变和不孕不育之间的关系.     

染色体4号长臂和9号短臂移位的遗传分析

目的 探讨母子4号和9号染色体移位的遗传效应。方法 无菌采集外周血,采用微量淋巴细胞培养法进行染色体制作,G显带分析染色体核型,并通过调查病史分析其遗传效应。结果 母亲染色体核型为46,XX,t（4;9）（q31;p24）,其子染色体核型为46,XY,der（9）t（4;9）（q31;p24）mat。其子的异常9号染色体是由母亲遗传而来。结论 母亲为染色体平衡移位携带者,患儿的异常9号染色体为母源的,该母亲出生正常后代的几率仅为1／18,故加强婚前和产前染色体检查对预防染色体病儿出生意义重大。     

乳腺癌化疗后继发伴t（8；16）（p11；p13）易位的急性髓系白血病1例报道

伴t(8;16)(p11;p13)易位的急性髓系白血病（AML）是一种非常罕见的白血病亚型,主要分子机制为位于染色体8p11的MYST3（MOZ）基因和位于16p13的CREBBP（CBP）基因发生断裂重排而致使细胞发生致瘤性转化。该染色体易位多见于治疗相关性AML（t-AML）患者,具有独特的临床及实验室特征,目前国内尚未检索到文献报道,现报告我们发现的1例乳腺癌化疗后继发伴t(8;16)( (p11;p13)易位的t-AML患者,并结合文献进行复习。     

46,XX,t(5;10;13;14)复杂平衡易位者染色体核型报告与病情分析

目的探讨染色体复杂平衡易位对女性受孕的影响。方法应用G显带技术对1对夫妇患者的外周血染色体进行分析,通过体外受精-胚胎移植(IVF-ET)技术对患者胚胎发育情况进行分析。结果患者外周血染色体核型为46,XX,t(5;10;13;14),4条染色体发生复杂易位,同时存在插入,丈夫外周血染色体核型正常;该夫妇进行1周期IVF助孕,获卵14枚,受精12枚,第3日(D3)形成优质胚胎11枚,第5日(D5)形成优质囊胚7枚。结论本患者虽然染色体复杂易位情况罕见,但仍能获得较多的优质囊胚。罕见的染色体复杂平衡易位患者获得完全正常后代的可能性极低,建议通过供卵途径助孕。     

Complex t(8;13;21)(q22;q14;q22)--a novel variant of t(8;21) in a patient with acute myeloid leukemia (AML-M2)

Variants of the t(8;21)(q22;q22) involving chromosome 8, 21, and other chromosomes account for about 3% of all t(8;21)(q22;q22) in acute myeloid leukemia (AML) patients. We report a case of AML-M2 with t(8;13;21)(q22;q14;q22), not reported earlier. Using a dual-color fluorescence in situ hybridization (FISH) analysis with ETO and AML1 probes, we demonstrate an ETO/AML1 fusion signal on the derivative chromosome 8. Whole chromosome painting probes were used for chromosomes 8 and 13, to demonstrate the three-way translocation t(8;13;21)(q22;q14;q22). Involvement of chromosome region 13q14 has never been reported earlier, although region 13q12 as a variant in AML with t(8;21) has been reported earlier. The possible role of genes in this region in leukemogenesis, its response to the treatment and its clinical implications are discussed.     

染色体相互易位t(4;7)及t(5;8)2例报告

例 1 　男 ,4岁 ,第 2胎 ,生长发育迟缓 ,智力发育障碍 ,呼吸道反复感染 ,因尿道下裂来我院泌尿外科就诊。患儿父母非近亲结婚 ,另生有一女 (6岁 ) ,生长发育正常。细胞遗传学检查 :外周血淋巴细胞培养制备染色体 ,常规Ｇ带核型分析。患儿核型为 4 6 ,ＸＹ ,ｔ(4;7) (4ｐｔｅｒ→ 4ｑ2 1∷ 7ｐ15→ 7ｐｔｅｒ;7ｑｔｅｒ→ 7ｐ15∷ 4ｑ2 1→ 4ｑｔｅｒ) (ＩＳＣＮ1995 ) ,见图 1,核型异常。父母、姐姐核型均正常。图 1　患儿核型 46,ＸＹ ,ｔ(4ｑ2 1;7ｐ15 )图 2　患者核型 46,ＸＹ ,ｔ(5ｐ13 ;8ｑ13 )例 2 　男 ,30岁 ,结婚 3年 ,其妻妊娠 2…     

Trisomy chromosome (22)(q13.1-qter) as a result of paternal inversion (22)(p11q13.1) proved using region-specific FISH probes

We present a male infant with multiple congenital anomalies including severe growth retardation, microcephaly, hypertelorism, low-set ears, bilateral cleft lip and palate, micrognathia, cryptorchidism with hypospadias, hemivertebrae, and complex heart defects. The karyotype was 46, XY, rec(22) dup(22q) inv(22)(p11q13)pat. The duplicated segment (q13.1 -->qter), a result of an unbalanced recombinant derived from the paternal inversion (22)(pllq13.1), was confirmed using results of silver staining for nucleolar organizer regions (NOR) and fluorescence in situ hybridization with region-specific probes (D22S75/D22S39 and Mbcr). This case further delineated the clinical entity of duplicated 22q13 or distal trisomy 22.     

Anaplastic large-cell lymphoma with atypical chromosomal translocation t(2;5) and hypophyseal tumor

Anaplastic large T-cell lymphoma (ALCL) is frequently associated with the t(2;5)(p23;q35). Here, we report a case of ALCL with an atypical translocation of t(2;5)(p24;q13) and other complex translocations. This complex abnormal karyotype may result in chemotherapy resistance and a poor outcome. Interestingly, a hypophyseal tumor was detected simultaneously by magnetic resonance imaging in this case. We think it is probable that the tumor in the hypophysis might be associated with the ALCL.     

Perinatal diagnosis of a fetus with an unbalanced translocation 46,XY,der(10)t(6;10)(p22;q26.1) with multiple malformations: a case report and literature review

The phenotype of an unbalanced translocation is characterized by the dosage effects of the affected genes in the translocated chromosome. We present the case of a fetus with a paternally derived unbalanced 46,XY,der(10)t(6;10)(p22;q26.1) translocation, detected following growth retardation and cardiac malformation. In trisomy 6p and 10q26 monosomy, external surface malformations, including characteristic facial abnormalities, and neurological or higher effects have been reported. Developmental delay and hypotonia are reported in ≤ 80% of cases of 10q monosomy. Herein, low birth weight, cephalic abnormalities including microcephaly, low-set ears and a high arched palate, ambiguous genitalia including scrotal hypoplasia and cryptorchidism, and congenital heart defects, including ventricular septal defect and pulmonary atresia, were observed. Neurological impact was not evaluated due to neonatal death. The mortality rate and frequency of low birth weight in such translocations has been seldom reported. In this case, severe cardiac malformation and low birth weight may have caused early neonatal death. Whilst Trisomy 6 is associated with low birth weight and perinatal death, few studies have reported these outcomes in 10q26 deletion syndrome. Our findings therefore contribute to the evidence base regarding unbalanced translocations and may improve the clinical management of such patients.     

Anaplastic large-cell lymphoma with atypical chromosomal translocation t(2;5) and hypophyseal tumor

Abstract

Anaplastic large T-cell lymphoma (ALCL) is frequently associated with the t(2;5)(p23;q35). Here, we report a case of ALCL with an atypical translocation of t(2;5)(p24;q13) and other complex translocations. This complex abnormal karyotype may result in chemotherapy resistance and a poor outcome. Interestingly, a hypophyseal tumor was detected simultaneously by magnetic resonance imaging in this case. We think it is probable that the tumor in the hypophysis might be associated with the ALCL.     

家族性t（5；11）细胞遗传学分析

目的染色体平衡易位是导致妊娠妇女习惯性流产、早产、新生儿早天的重要原因之一。通过对一连续３代出现ｔ（５；１１）家系的分析，为习惯性流产病因病理学提供新的资料。方法全血微量培养法培养外周血淋巴细胞，染色体行Ｇ、Ｃ式显带分析，调查研究先证者家系系谱。结果先证者２次培养、制作，全部核型均为４６，ｘｘ，ｔ（５；１１）（ｑ１３；ｑ２３）（５ｑｔｅｒ→５ｑ１３∷１１ｑ２３→１１ｐｔｅｒ；５ｐｔｅｒ→５ｑ１３∷１１ｑ２３→１１ｑｔｅｒ），先证者父亲、祖父的全部核型均携带有与先证者相同之衍生染色体。结论先证者及其父亲、祖父均为ｔ（５；１１）（ｑ１３；ｑ２３），十分罕见。由于携带者遗传物质丢失较少，故其表型及智力不受影响，但其生育方面的影响是明显的。先证者的表型与染色体无直接关系，唯一可疑的致畸因素是其母孕早期成病性地连续服用果导片。     

21三体患儿合并t(15;21)1例

1　病例报告　男 ,6 mo龄 ,足月顺产 ,患有先天性心脏病、房室缺 .外貌特征 :眼型小、眼距加宽 ,两眼内侧角低、外侧角高、鼻梁低平、口唇宽大 ,口式呼吸 ,经常伸舌 ,流涎 ,较同龄儿体小 ,目光呆滞 ,双手均为 6指 ,左手为通贯手 .患儿出生时 ,父亲 2 6岁 ,母亲 2 4岁 ,父母表型均正常 ,非近亲婚配 ,自述无家族遗传病史 .细胞遗传学检查 :外周淋巴细胞培养 ,常规制片、G显带 ,显微镜下计数 30个分裂相 ,分析 6个核型 ,确定染色体核型为 46 ,XY 15 qter→ Pter:2 1pter→ qter.2　讨论　先天愚型是临床上最常见的染色体异常病 [1 ] ,其发病…     

习惯性流产夫妇中的3;18平衡易位核型

本文观察了1对习惯性流产夫妇的染色体,其丈夫有46,XY,t(3;18)(3qter→3p22::18q23→18qter;18pter→18q23::3p22→3qter)平衡易位核型,并有一个1qh~+的标记染色体。他们曾不明原因地连续流产3次,大产1胎无脑儿。这个平衡易位携带者为产前检查提供了新的易位核型。     

46,xy,t（2;16）（q23;q22）首报一例

临床资料 男,26岁。婚后其妻孕两次,第一次孕50d拟诊为宫外孕,保守治疗;第二次孕50+d自然流产。夫妇非近亲结婚,孕期无有害物质及放射线接触史,否认家族中有类似病史,其父母拒绝染色体检查。 细胞遗传学:外周血淋巴细胞培养常规方法制片,G显带分析。患者核型为:46,xy,t(2;16)(q23;q22)。其妻为:46,xx,正常。     

伴有t(4;16)(q11;p12)非朗格汉细胞组织细胞增多症——首例报道并文献复习

【】 目的 报道1例伴t(4;16)(q11;p12)累及骨髓的非朗格汉细胞组织细胞增多症。方法 对1例非朗格汉细胞组织细胞增多症进行血象、生化、骨髓形态、病理免疫组化、染色体核型和分子生物学检测,并进行多项影像学测评,并复习相关文献。结果 发现1例侵犯骨髓的非朗格汉细胞组织细胞增多症,骨髓检查见到大量组织细胞,组织化学染色CD68 (+)、S100 (+++)、CD1a (-),染色体t(4;16)(q11;p12),BRAF V600E、N-RAS突变检测阴性,同时有皮肤、肝脾、骨骼、骨髓、中枢神经系统以及眼底浸润。结论 非朗格汉细胞组织细胞增多症可以多系统累及,并伴有异常染色体改变,临床意义值得探讨。