Unbalanced translocation 46,xy,−15,+der(22)t(15;22)(q13;q11)pat: Case report and review of the literature

We present a boy with a rare unbalanced translocation 46,XY,?15,+der(22),t(15;22)(q13;q11) pat. Previous reports of similar chromosome findings mention only the Prader-Willi phenotype. At birth, his manifestations included severe hypotonia and lethargy, (typical of deletion of 15pter→q13); hypertelorism, down-slanting small palpebral fissures, preauricular tags, long philtrum (typical of duplication of 22pter→q11); severe laryngotracheo-malacia, and proximal implantation of the thumb. In a review of the literature on chromosome abnormalities involving duplication of 22q11 the associated clinical phenotype consists of mild mental retardation, microcephaly, hypotonia, hypertelorism, down-slanting palpebral fissures, a long philtrum, cleft or highly arched palate, and ear abnormalities. Preauricular pits or tags are common. Cardiovascular defects, renal and genital problems and dislocated hips are frequently present. Anal atresia and colobomata are mainly seen in cat-eye syndrome, the phenotype associated with idic 22q11. Our findings indicate that patients with unbalanced t(15;22) can have manifestations of the dup 22q11, in addition to the previously reported Prader-Willi phenotype, even if the duplicated segment is small. © 1992 Wiley-Liss, Inc.     

47,XY,+der(13)t(13;15)(q12;q24)mat一例

患儿男,2个半月,生后发现先天性心脏病、手足畸形,体重增长慢,喂养困难,喉鸣.第一胎足月顺产,出生体重3450g,无抢救.现体重3750 g.母亲孕期无特殊,分娩前2天自觉胎动少.     

Trisomy 18q: 46, XX,13q+,t(13;18)(q32;q11) in a newborn associated with multiple congenital anomalies due to paternal reciprocal translocation, 46, XY,-13,+der(13)/t(13;18)(q32;q11)

A 20-day-old female neonate presented with multiple congenital anomalies, convulsions and failure to thrive. Karyotype analysis of the proposita revealed an unbalanced translocation, 46, XX,13q+,t(13;18)(q32;qll)pat resulting in partial trisomy 18q. Her father and a 5-year-old sister were phenotypically normal, balanced translocation carriers, 46, XY, -13, + der(13),t(13;18)(q32;qll) and 46, XX,-13,+der(13),t(13;18)(q32;qll), respectively. The case presented here is the second liveborn reported with trisomy 18q and is of interest from the point of view of the structural chromosomal aberration resulting in the manifestations of most features of trisomy 18 and some of 13q monosomy. The infant died due to convulsions at the age of 2 months.     

染色体46,XY,t(18;21)(q11;q22)平衡易位携带者一例

目的报道染色体46,XY,t(18;21)(q11;q22)平衡易位携带者1例。方法采用外周血淋巴细胞培养法,G显带。结果染色体核型分析为46,XY,t(18;21)(q11;q22)。结论平衡易位是导致不良孕产的重要原因,也是导致男性不育的常见原因。如查出平衡易位携带者,给予他们正确的优生指导及产前诊断,对降低出生缺陷的发病率有重要的作用。     

De novo balanced reciprocal translocation 46,XY,t(6;8)(q13;q22).

A 5-month-old infant was examined because of minor multiple malformations. He was found to have a de novo blanced reciprocal translocation 46,XY,t(6;8(q13;q22). On follow-up at the age of 17 months his mental development was found to be within normal limits.     

Frontonasal malformation and reciprocal translocation t(15;22)(q22;q13)

Trisomy 13 is very rare in live-born children. Only a small number of these children survive the first year and very few cases are reported to live longer. Survival time depends partly on the cytogenetic findings - full trisomy 13 or trisomy 13 mosaicism - and partly on the existence of serious somatic malformations. We report on a 11-year-old girl with full trisomy 13. In this case, missing cerebral and cardiovascular malformations probably allowed the long survival.     

Two new chromosomal abnormalities in chronic myelogenous leukemia 46,XY,t(9;15;22)(q34;q22;q11) and 46,XY,t(6;9;12;22)(p21;q34;q24;q11)

Two new variant cases of chronic myelogenous leukemia (CML) are presented. The first case is a 19-year-old male with a 46,XY,t(9;15;22)(q34;q22;q11) karyotype. The second case is a 75-year-old man with a 46,XY,t(6;9;12;22)(p21;q34;q24;q11) karyotype. In both cases, the prognosis was no different from those cases of CML with the standard t(9;22) as the only abnormality. We recommend that all unusual translocations be reported.     

Partial trisomy 6p with karyotype 46,XY,der(22), t(6;22)(p22;q13)mat.

A case of partial trisomy 6p is reported with a review of the various characteristics of this syndrome.     

46，XX，t（1；7）（q21；q22）pat一例

患者女,28岁,婚后于2000年9月孕1月余“不全流产”,2003年2月,2004年12月“稽留流产”,3次均无明显诱因,而且每次都需要治疗才能怀孕,于2006年4月生育一女孩,现11个月,无明显异常,未做染色体检查,孕期拒绝做产前诊断。夫妻表型、智力正常,身体健康,非近亲结婚。患者母亲第1、2孕均于孕3个月流产,后生育3个女儿,表型正常,该患者为第3个女儿,患者二姐生育一男孩,表型、智力正常。细胞遗传学检查:取夫妇静脉血肝素抗凝,经常规培养制片,G显带处理,分析30个中期分裂相。患者核型为46,XX,t(1;7)(1pter→lq21∷7q22→7qter;7pter→7q22∷lq21→1q…     

45,XY,-4,-15,+t(4;15)(p16;p13)-例

患者男,1岁.因先天性发育不良来我院儿科就诊.查体:眼距宽,舌外伸,无通贯掌及掌纹异常,身高、体重均明显低于正常月龄儿童.B超检查显示有先天性心脏病.父亲38岁、母亲35岁生育该患儿,为第2胎.     

46，XX，t（4；9）（q31；p24）与46，XY，-9，＋der（9）（P＋）各一例

患者 女，26岁，已婚5年，因生育一异常染色体病男婴要求做染色体检查而就诊。患者系第4胎，足月顺产，出生时体重约3．5kg，身长约42cm，各器官无明显异常。查体：身高155cm，体重50kg，眼距不宽，鼻较小，鼻梁扁平，后发际不低，智力正常：患者月经初潮13岁，经期4～5天，经量及周期基本正常．患者祖父母和父母非近亲结婚，体健，表型正常，父亲抽烟，量中等，无其他不良嗜好，其母亲于孕期间无发热及感染史，未曾服用任何药物，无自然流产等异常妊娠史，有长期接触农药史。患者有一姐和一哥，均结婚，正常生育。     

Maternal translocation t(13:18)(q34:q11) and Edwar''s syndrome in a fetus: 47, XY, t(13:18)(q34:q11) + 18

A 32-year-old woman, who presented with four spontaneous abortions, was found to have a balanced translocation: 46,XX,t(13:18)(q34:q11). In the last pregnancy an amniocentesis was done. Abnormal constitution of the fetus had been detected: 47,XY,t(13:18)(q34:q11) + 18, and an abortion was induced. Examination of the fetal tissue confirmed the finding. The fetus showed the characteristics of Edward's syndrome. Through the patient's pedigree it was discovered that balanced translocation appeared in three generations.     

Chiasma-derived genetic lengths and recombination fractions: a reciprocal translocation 46, XY, t(1; 22) (q32; q13)

The chiasma distribution in a human male carrier of a balanced reciprocal translocation 46, XY, t(1; 22) (q32; q13) has been compared with data from six controls. The translocation carrier shows a raised chiasma frequency and altered chiasma distribution in chromosome 1, particularly in the region adjacent to the breakpoint. These changes are expected to distort the recombination pattern, implying that caution should be taken when trying to incorporate linkage data from translocation families into the normal genetic map.     

46，XY，inv（9）（p11；q13）一例

患者 男，25岁，结婚1年，其妻第1次妊娠，孕32周例行产前检查时，B超示胎儿脐带膨出，腹壁缺损，肠外翻。患者夫妇双方表型、智力正常，非近亲结婚，无致畸因素接触史。     

Prenatal diagnosis of congenital diaphragmatic hernia in a fetus with 46,XY/46,X,-Y,+der(Y)t(Y;1)(q12;q12) mosaicism: a case report

Congenital diaphragmatic hernia (CDH) is often associated with major anomalies and chromosomal abnormalities. Chromosomal abnormalities are usually detected in 9.5% to 34% of fetuses with CDH prenatally diagnosed and the defect has also been reported in association with multiple syndromes such as Pallister-Killian syndrome, Fryns syndrome, Di George syndrome and Apert syndrome. Among the chromosomal abnormalities associated with CDH, trisomy 21, 18, and 13 are most common. Association with complex chromosomal aberrations such as mosaicism has also been reported. However, CDH presented in a fetus with Y-autosome translocation is extremely rare. Herein, we reported a case of fetus with 46,XY/46,X,-Y, +der(Y)t(Y;1)(q12;q12) mosaicism who presented with CDH diagnosed by ultrasonography at 19 weeks' gestation.     

46,XX,t(14;15)(q22;q26)一例

患者男,39岁,妻子40岁,因年龄偏大于生育前到我院进行遗传咨询.夫妻表型、智力正常,身体健康,非近亲结婚.双方家族中无遗传病史.     

46,XY,t(4;12)(q21;q11)mat胎儿一例

患者女,36岁.结婚11年,怀孕2次,均于孕60天左右自然流产.患者智力、表型正常,夫妇双方非近亲婚配,孕期未接触有害物质.现再次妊娠,孕初期有少量淡血性分泌物,保胎治疗1周好转,因孕妇高龄、反复流产、产前筛查21三体高风险,要求羊水穿刺检查胎儿染色体.     

Mosaic Down''s syndrome with de novo 45,XX,-21,-22,+t(21q;22q)/46,XX,-21,+t(21q;21q) rearrangement.

The occurrence of mosaic Down's syndrome with two independent Robertsonian translocation cell lines is very rare. Such a patient is reported here, in whom an unbalanced Robertsonian translocation between two chromosomes 21 was detected in the majority of cells. The patient also revealed a minor cell line with a second Robertsonian translocation involving a chromosome 21 and a 22. The chromosome translocations detected in this patient were de novo in origin.