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Chen CP, Hsieh CH, Chern SR, Wu PS, Chen SW, Lai ST, Chuang TY, Yang CW, Lee CC, Wang W. Prenatal diagnosis and molecular cytogenetic characterization of an interstitial deletion of 18q12.1-q12.3 encompassing DTNA, CELF4 and SETBP1. Taiwan J Obstet Gynecol 2017; 56:847-851. [PMID: 29241933 DOI: 10.1016/j.tjog.2017.10.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2017] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVE We present prenatal diagnosis and molecular cytogenetic characterization of an interstitial deletion of 18q12.1-q12.3. CASE REPORT A 35-year-old woman underwent amniocentesis at 18 weeks of gestation because of advanced maternal age. Amniocentesis revealed a karyotype of 46,XX,del(18)(q12.1q12.3). The fetal ultrasound was unremarkable. The woman underwent repeat amniocentesis at 20 weeks of gestation. Array comparative genomic hybridization (aCGH) using uncultured amniocytes revealed a 10.76-Mb interstitial deletion 18q12.1-q12.3 or arr 18q12.1q12.3 (31,944,347-42,704,784) × 1.0 encompassing 19 Online Mendelian Inheritance of in Man (OMIM) genes including DTNA, CELF4 and SETBP1. Metaphase fluorescence in situ hybridization analysis on cultured amniocytes confirmed an 18q proximal interstitial deletion. The parental karyotypes were normal. Polymorphic DNA marker analysis determined a paternal origin of the deletion. The pregnancy was subsequently terminated at 24 weeks of gestation, and a 650-g fetus was delivered with characteristic facial dysmorphism. CONCLUSION aCGH analysis and polymorphic DNA marker analysis at amniocentesis are useful for determination of the deleted genes and the parental origin of the de novo deletion, and the acquired information is helpful for genetic counseling.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medicine, Mackay Medical College, New Taipei, Taiwan; Department of Biotechnology, Asia University, Taichung, Taiwan; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Institute of Clinical and Community Health Nursing, National Yang-Ming University, Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
| | - Chih-Heng Hsieh
- Department of Obstetrics and Gynecology, BIN KUN Women's & Children's Hospital, Taoyuan, Taiwan
| | - Schu-Rern Chern
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | | | - Shin-Wen Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Shih-Ting Lai
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Tzu-Yun Chuang
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chien-Wen Yang
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chen-Chi Lee
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Wayseen Wang
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Department of Bioengineering, Tatung University, Taipei, Taiwan
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2
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Jones CA, Kolomietz E, Maire G, Vlasschaert M, Joseph-George AM, Myles-Reid D, Chong K, Chitayat D, Arthur R. PGD for a carrier of an intrachromosomal insertion using aCGH. Syst Biol Reprod Med 2014; 60:377-82. [PMID: 25247722 DOI: 10.3109/19396368.2014.962710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Intrachromosomal insertions are rare and difficult to diagnose. However, making the correct diagnosis is critical for genetic risk assessment, and prenatal and preimplantation genetic diagnosis outcomes. We present a case of preimplantation genetic diagnosis (PGD) using array comparative genomic hybridization (aCGH) following trophectoderm biopsy of embryos created after in vitro fertilization for a carrier of an intrachromosomal insertion on chromosome 1 [46,XX, ins(1)(q44q23q32.1)]. The PGD analysis of 6 blastocysts demonstrated 67% unbalanced embryos. No pregnancy was achieved after the transfer of 2 euploid embryos. To the best of our knowledge, this is the first reported case of PGD using aCGH following trophectoderm biopsy for a carrier of an intrachromosomal insertion.
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Affiliation(s)
- Claire Ann Jones
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Mount Sinai Hospital, University of Toronto
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3
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Harbuz R, Bilan F, Couet D, Charraud V, Kitzis A, Gilbert-Dussardier B. Osteogenesis imperfecta, tricho-dento-osseous syndrome and intellectual disability: a familial case with 17q21.33-q22 (COL1A1 and DLX3) deletion and 7q32.3-q33 duplication resulting from a reciprocal interchromosomal insertion. Am J Med Genet A 2013; 161A:2504-11. [PMID: 23949819 DOI: 10.1002/ajmg.a.36122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 06/13/2013] [Indexed: 11/08/2022]
Abstract
We report on a 22-year-old woman with features of osteogenesis imperfecta (OI), tricho-dento-osseous (TDO) syndrome and intellectual disability. Whole genome oligonucleotide microarray analysis revealed a copy number gain of 3 Mb in 7q32.3-q33 and a loss of 3.4 Mb in 17q21.33-q22. FISH analysis showed that the third copy of 7q32 was inserted into the long arm of one chromosome 17, exactly in the region 17q21.33-q22 that was deleted. The maternal uncle presented with clinical features similar to the proposita and had the same chromosomal anomalies. The mother of the proposita and two other family members were balanced carriers of this rearrangement, interpreted as an interchromosomal reciprocal insertion. Reciprocal insertion/four-break rearrangement is a very rare chromosomal event. The deleted region on chromosome 17 contains 39 genes, including COL1A1 and DLX3 involved in OI and TDO syndrome respectively. The CACNA1G gene on the deleted segment of chromosome 17 may be a good candidate gene to explain the intellectual impairment. © 2013 Wiley Periodicals, Inc.
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Affiliation(s)
- Radu Harbuz
- Service de Génétique, Centre Hospitalier Universitaire, Poitiers, France; Equipe de Génétique de Maladies Rares, Université de Poitiers, France
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4
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Manolakos E, Vetro A, Papadopoulou E, Kefalas K, Lagou M, Thomaidis L, Peitsidis P, Sifakis S, Divane A, Ziegler M, Liehr T, Zuffardi O, Papoulidis I. Partial trisomy 2p and partial monosomy 2q arising from a paternal intrachromosomal 2q-into-2p between-arm insertion and paracentric inversion: molecular cytogenetic characterization of a four-break rearrangement. Cytogenet Genome Res 2013; 140:12-20. [PMID: 23652918 DOI: 10.1159/000350868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2012] [Indexed: 11/19/2022] Open
Abstract
We report on a 26-month-old boy with an interstitial duplication of 2p22.3p22.2 and an interstitial deletion of 2q14.1q21.2. The abnormality was derived from his father having a balanced paracentric inversion and pericentric insertion. The deletion in the child was identified by cytogenetic analysis and characterized in more detail by molecular cytogenetics and array comparative genomic hybridization. The latter revealed a 20-Mb deletion in the long arm and a 5.6-Mb duplication in the short arm of chromosome 2. Fluorescence in situ hybridization in paternal chromosomes characterized an intrachromosomal insertion of 2q14.1q21.2 into 2p23; additionally a paracentric inversion of 2p13p23 was observed. The boy with the unbalanced karyotype suffered from severe psychomotor retardation, thrombophilia due to protein C deficiency, and hypertrophic cardiomyopathy and also had phenotypic abnormalities. Most of these features have previously been described in individuals with interstitial deletion of 2q14.1.
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Affiliation(s)
- E Manolakos
- Eurogenetica S.A., Laboratory of Genetics, Athens-Thessaloniki, Greece.
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5
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Henson KE, Hines KA, Weaver DD, Torres WM, Verbrugge J, Stone K, Vance GH. Duplication of 18q21.32-q22.3 identified in a stillborn and two relatives with minimal dysmorphic features. Am J Med Genet A 2012; 158A:1788-92. [PMID: 22653737 DOI: 10.1002/ajmg.a.35405] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 03/14/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Kaylee E Henson
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, Indiana 46256, USA.
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6
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Halgren C, Bache I, Bak M, Myatt MW, Anderson CM, Brøndum-Nielsen K, Tommerup N. Haploinsufficiency of CELF4 at 18q12.2 is associated with developmental and behavioral disorders, seizures, eye manifestations, and obesity. Eur J Hum Genet 2012; 20:1315-9. [PMID: 22617346 PMCID: PMC3499750 DOI: 10.1038/ejhg.2012.92] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Only 20 patients with deletions of 18q12.2 have been reported in the literature and the associated phenotype includes borderline intellectual disability, behavioral problems, seizures, obesity, and eye manifestations. Here, we report a male patient with a de novo translocation involving chromosomes 12 and 18, with borderline IQ, developmental and behavioral disorders, myopia, obesity, and febrile seizures in childhood. We characterized the rearrangement with Affymetrix SNP 6.0 Array analysis and next-generation mate pair sequencing and found truncation of CELF4 at 18q12.2. This second report of a patient with a neurodevelopmental phenotype and a translocation involving CELF4 supports that CELF4 is responsible for the phenotype associated with deletion of 18q12.2. Our study illustrates the utility of high-resolution genome-wide techniques in identifying neurodevelopmental and neurobehavioral genes, and it adds to the growing evidence, including a transgenic mouse model, that CELF4 is important for human brain development.
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Affiliation(s)
- Christina Halgren
- Department of Cellular and Molecular Medicine, Wilhelm Johannsen Centre for Functional Genome Research, University of Copenhagen, Faculty of Health Sciences, Copenhagen, Denmark.
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7
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Bouquillon S, Andrieux J, Landais E, Duban-Bedu B, Boidein F, Lenne B, Vallée L, Leal T, Doco-Fenzy M, Delobel B. A 5.3Mb deletion in chromosome 18q12.3 as the smallest region of overlap in two patients with expressive speech delay. Eur J Med Genet 2011; 54:194-7. [DOI: 10.1016/j.ejmg.2010.11.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Accepted: 11/24/2010] [Indexed: 11/16/2022]
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8
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Zavala J, Ramirez M, Medina R, Heard P, Carter E, Crandall A, Hale D, Cody J, Escamilla M. Psychiatric syndromes in individuals with chromosome 18 abnormalities. Am J Med Genet B Neuropsychiatr Genet 2010; 153B:837-45. [PMID: 19927307 DOI: 10.1002/ajmg.b.31047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Chromosome 18 abnormalities are associated with a range of physical abnormalities such as short stature and hearing impairments. Psychiatric manifestations have also been observed. This study focuses on the presentations of psychiatric syndromes as they relate to specific chromosomal abnormalities of chromosome 18. Twenty-five subjects (13 with an 18q deletion, 9 with 18p tetrasomy, and 3 with an 18p deletion), were interviewed by psychiatrists (blind to specific chromosomal abnormality) using the DIGS (subjects 18 and older) or KSADS-PL (subjects under 18). A consensus best estimation diagnostic process was employed to determine psychiatric syndromes. Oligonucleotide Array Comparative Genomic Hybridization (Agilent Technologies) was utilized to define specific regions of chromosome 18 that were deleted or duplicated. These data were further analyzed to determine critical regions of the chromosome as they relate to phenotypic manifestations in these subjects. 58.3% of the chromosome 18q- deletion subjects had depressive symptoms, 58.3% had anxiety symptoms, 25% had manic symptoms, and 25% had psychotic symptoms. 66.6% of the chromosome 18p- deletion subjects had anxiety symptoms, and none had depressive, manic, or psychotic symptoms. Fifty percent of the chromosome 18p tetrasomy subjects had anxiety symptoms, 12.5% had psychotic symptoms, and 12.5% had a mood disorder. All three chromosomal disorders were associated with high anxiety rates. Psychotic, manic and depressive disorders were seen mostly in 18q- subjects and this may be helpful in narrowing regions for candidate genes for these psychiatric conditions.
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Affiliation(s)
- Juan Zavala
- Department of Psychiatry, South Texas Psychiatric Genetics Research Center, University of Texas Health Science Center at San Antonio, 454 Soledad, Suite 200, San Antonio, TX 78205, USA
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9
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Yatsenko SA, del Valle Torrado M, Fernandes PH, Wiszniewska J, Gallego M, Herrera J, Bacino CA. Molecular characterization of a balanced rearrangement of chromosome 12 in two siblings with Noonan syndrome. Am J Med Genet A 2009; 149A:2723-30. [DOI: 10.1002/ajmg.a.33112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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10
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Ou Z, Martin DM, Bedoyan JK, Cooper ML, Chinault AC, Stankiewicz P, Cheung SW. Branchiootorenal syndrome and oculoauriculovertebral spectrum features associated with duplication ofSIX1,SIX6, andOTX2resulting from a complex chromosomal rearrangement. Am J Med Genet A 2008; 146A:2480-9. [DOI: 10.1002/ajmg.a.32398] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Buysse K, Menten B, Oostra A, Tavernier S, Mortier GR, Speleman F. Delineation of a critical region on chromosome 18 for the del(18)(q12.2q21.1) syndrome. Am J Med Genet A 2008; 146A:1330-4. [DOI: 10.1002/ajmg.a.32267] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Cody JD, Sebold C, Malik A, Heard P, Carter E, Crandall A, Soileau B, Semrud-Clikeman M, Cody CM, Hardies LJ, Li J, Lancaster J, Fox PT, Stratton RF, Perry B, Hale DE. Recurrent interstitial deletions of proximal 18q: a new syndrome involving expressive speech delay. Am J Med Genet A 2007; 143A:1181-90. [PMID: 17486614 DOI: 10.1002/ajmg.a.31729] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Most deletions of the long arm of chromosome 18 involve some part of the most distal 30 Mb. We have identified five individuals with cytogenetically diagnosed interstitial deletions that are all proximal to this commonly deleted region. The extent of their deletions was characterized using molecular and molecular cytogenetic techniques. Each participant was assessed under the comprehensive clinical evaluation protocol of the Chromosome 18 Clinical Research Center. Three of the five individuals were found to have apparently identical interstitial deletions between positions of 37.5 and 42.5 Mb (18q12.3-->18q21.1). One individual's deletion was much larger and extended from a more proximal breakpoint position of 23 Mb (18q11.2) to a more distal breakpoint at 43 Mb (18q21.1). The fifth individual had a proximal breakpoint identical to the other three, but a distal breakpoint at 43.5 Mb (18q21.1). The clinical findings were of interest because the three individuals with the smaller deletions lacked major anomalies. All five individuals were developmentally delayed; however, the discrepancy between their expressive and receptive language abilities was striking, with expressive language being much more severely affected. This leads us to hypothesize that there are genes in this region of chromosome 18 that are specific to the neural and motor planning domains necessary for speech. Additionally, this may represent a previously underappreciated syndrome since these children do not have the typical clinical abnormalities that would lead to a chromosome analysis.
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Affiliation(s)
- Jannine D Cody
- Department of Pediatrics, University of Texas Health Science Center, San Antonio, Texas 78229, USA.
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13
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Kotzot D, Haberlandt E, Fauth C, Baumgartner S, Scholl-Bürgi S, Utermann G. Del(18)(q12.2q21.1) caused by a paternal sister chromatid rearrangement in a developmentally delayed girl. Am J Med Genet A 2005; 135:304-7. [PMID: 15887269 DOI: 10.1002/ajmg.a.30727] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Monosomy of 18q12.3 has been reported in only 16 cases, in one as a mosaic with a normal cell line. Abnormal behaviour, developmental delay, normal measurements, and minor facial anomalies including ptosis, bilateral epicanthus, strabismus, short and slightly down-slanting palpebral fissures, and full cheeks are characteristic manifestations. We report on a 26-month-old girl with del(18)(q12.2q21.1) and typical phenotype. Microsatellite mediated haplotype analysis showed approximately 12 Mb deletion and demonstrated that the deletion was most likely formed during paternal meiosis by a rearrangement between the grandpaternal sister chromatids.
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Affiliation(s)
- Dieter Kotzot
- Institute of Medical Biology and Human Genetics, Medical University of Innsbruck, Innsbruck, Austria.
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14
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Malmgren H, Malm G, Sahlén S, Karlsson M, Blennow E. Molecular cytogenetic characterization of an insertional translocation, ins(6;7)(p25;q33q34): Deletion/duplication of 7q33-34 and clinical correlations. Am J Med Genet A 2005; 139:25-31. [PMID: 16222668 DOI: 10.1002/ajmg.a.30983] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A balanced insertional translocation between chromosomes 6 and 7, ins(6;7)(p25;q33q34) has been extensively investigated. The insertional translocation was found in several members of a three-generation family, where some were healthy balanced carriers while others had clinical symptoms due to deletion or duplication of 7q33-34. The deleted/duplicated segment could only be detected using high resolution banding and fluorescent in situ hybridization. A number of BAC/PAC clones located on chromosome 6 and 7 were used to characterize the breakpoint regions in detail and to determine the size of the deletion, which was 7.6 Mb, containing up to 68 genes. However, the insert on chromosome 6 was only 7.4 Mb, due to a deletion of 227 kb at the distal breakpoint on 7q. This small deletion was also found in the "balanced" carriers, and although the chromosome segment contains at least eight genes, none of the carriers seem to be affected by haploinsufficiency, since the phenotype is apparently normal. This is the first detailed characterization and phenotype correlation of such a deletion/duplication of distal 7q.
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Affiliation(s)
- H Malmgren
- Department of Molecular Medicine, Clinical Genetics Unit, Karolinska Institutet, Stockholm, Sweden
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15
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Giardino D, Finelli P, Amico FP, Gottardi G, Civa R, Corona G, Nocera G, Larizza L. Unbalanced segregation of a complex four-break 5q23–31 insertion in the 5p13 band in a malformed child. Eur J Hum Genet 2004; 12:455-9. [PMID: 15054394 DOI: 10.1038/sj.ejhg.5201150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
A rec(5)dup(5)(q23.2q31.3) inherited from a maternal ins(5)(p13.1q23.2q31.3) was detected in a 4-month-old male child who showed hypotonia, microcephaly, cardiac defects, pulmonary hypoplasia and stenosis, bilateral hydronephrosis, hydrocele, testicular hypoplasia and phimosis. Dysmorphisms were also observed. We compare the clinical characteristics of our patient with those of the previously reported dup5q cases in an attempt to define the phenotype-karyotype correlation. The maternal insertion responsible for the duplicated 5q23.2-31.3 region in the child was characterized in detail by FISH analysis, which identified a complex rearrangement involving four breakpoints (bkp's): a 5q segment excised following breakage at 5q23.2 and 5q31.3 became inverted and inserted at 5p13.1, probably coincidentally with an internal breakage at 5q23.3 causing a 180 degrees rotation of the two subsegments. The mother's karyotype was consequently defined as 46,XX, ins(5)(pter --> p13.1 Colon, two colons q23.3 --> q23.2 Colon, two colons q31.3 --> q23.3 Colon, two colons p13.1 --> q23.2 Colon, two colons q31.3 --> qter). There are clusters of Alu sequences in the genomic clones spanning all the four bkp's, suggesting their possible involvement in the rearrangement. No clinical phenotype was associated with this balanced rearrangement in the mother and a number of other carriers in the same family.
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Affiliation(s)
- Daniela Giardino
- Laboratorio di Citogenetica, Istituto Auxologico Italiano, Milan, Italy.
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16
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Tinkle BT, Christianson CA, Schorry EK, Webb T, Hopkin RJ. Long-term survival in a patient with del(18)(q12.2q21.1). Am J Med Genet A 2003; 119A:66-70. [PMID: 12707962 DOI: 10.1002/ajmg.a.10217] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The 18q- syndrome is relatively common among cytogenetic abnormalities occurring in approximately 1 in 40,000 live births. However, interstitial deletions involving 18q12.2 to q21.1 are much less common. Only 15 cases have been reported in the literature. A phenotypic pattern is emerging of mild dysmorphic features, mental retardation, behavior abnormalities, and the lack of serious malformations. We present a 67-year-old woman with minor dysmorphic features, moderate mental retardation, hyperphagia, and del(18)(q12.2q21.1). This patient is presented for the natural history of this deletion syndrome as well as the behavioral phenotype.
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Affiliation(s)
- Brad T Tinkle
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio 45229, USA
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17
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Starke H, Senger G, Kossakiewicz M, Tittelbach H, Rau D, Rubtsov N, Trifonov V, Heller A, Hartmann I, Claussen U, Liehr T. Maternal insertion of 18q11.2-q12.2 in 18p11.3 of the same chromosome analysed by microdissection and multicolour banding (MCB). Prenat Diagn 2001; 21:1049-52. [PMID: 11746162 DOI: 10.1002/pd.192] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVES Different aberrations in one chromosome 18 were prenatally detected during each of three different pregnancies of a healthy woman. Routine cytogenetic analysis revealed a morphologically altered maternal chromosome 18 as well. The purpose of the current study was to characterize these cytogenetic changes in detail and thus to clarify the reason for the recurrent appearance of morphologically altered chromosomes 18 in this family. METHODS As GTG banding did not allow resolution of the kind of aberrations present in these four cases, the following molecular cytogenetic approaches were used: microdissection combined with reverse painting and multicolour banding (MCB) analysis using a chromosome 18 specific probe set. RESULTS Molecular cytogenetic approaches revealed that fetus 1 had a derivative chromosome del(18)(q11.2q12.2), fetus 2 and the mother had the identical derivative chromosomes ins(18)(pterp11.32::q12.2q11.2::p11.32q11.2::q12.3qter) and fetus 3 had a dup(11.2q12.2). CONCLUSION Partial monosomy in fetus 1 and partial trisomy in fetus 3 can be explained by crossing over events during maternal meiosis.
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Affiliation(s)
- H Starke
- Institute of Human Genetics and Anthropology, Kollegiengasse 10, D-07740 Jena, Germany
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18
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Tanemura M, Suzumori K, Nishikawa N, Ishihara Y. Multicolour spectral karyotyping for complex chromosomal rearrangements in repeated abortion or congenital anomalies. Prenat Diagn 2001; 21:1123-8. [PMID: 11787036 DOI: 10.1002/pd.183] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Advances in molecular cytogenetics, especially the technique of fluorescence in situ hybridization (FISH), have allowed more precise definition of chromosomal structures, which are difficult to identify using conventional G-banding. Recently, a novel approach based on hybridization of 24 fluorescent-labelled chromosome painting probes was developed, termed spectral karyotyping (SKY), which allows the simultaneous and differential colour display of all human chromosomes. We have used SKY to identify not only five parental complex translocation carriers but also minute chromosome rearrangements in the fetus. Here, we concentrate attention on the clinical application of SKY for prenatal diagnosis.
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Affiliation(s)
- M Tanemura
- Department of Obstetrics and Gynaecology, Nagoya City University Medical School, Nagoya, Japan
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19
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Sáenz Hurtado J, Galán Gómez E, Carbonell Pérez J, Villa Milla A, Rodríguez Martínez L, Agulla Rodiño E, Cardesa García J. Trisomía 18q parcial derivada de translocación recíproca 4;18 materna. An Pediatr (Barc) 2001. [DOI: 10.1016/s1695-4033(01)77627-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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20
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Doheny KF, Rasmussen SA, Rutberg J, Semenza GL, Stamberg J, Schwartz M, Batista DAS, Stetten G, Thomas GH. Segregation of a familial balanced (12;10) insertion resulting in dup(10)(q21.2q22.1) and del(10)(q21.2q22.1) in first cousins. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1096-8628(19970317)69:2<188::aid-ajmg14>3.0.co;2-h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Park JP, Moeschler JB, Davies WS, Patel PI, Mohandas T. Smith-Magenis syndrome resulting from a de novo direct insertion of proximal 17q into 17p11.2. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1096-8628(19980428)77:1<23::aid-ajmg6>3.0.co;2-m] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Engelen JJ, Loots WJ, Albrechts JC, Plomp AS, van der Meer SB, Vles JS, Hamers GJ, Geraedts JP. Characterization of a de novo unbalanced translocation t(14q18q) using microdissection and fluorescence in situ hybridization. ACTA ACUST UNITED AC 1998. [DOI: 10.1002/(sici)1096-8628(19980203)75:4<409::aid-ajmg11>3.0.co;2-s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Asamoah A, Nandi KN, Prouty L, Thurmon TF, Chen H. A case of insertional translocation involving chromosomes 2 and 4. Clin Genet 1998; 53:142-6. [PMID: 9611076 DOI: 10.1111/j.1399-0004.1998.tb02662.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
We report on a 6-year-old Caucasian boy with direct insertion of genetic material from the short arm of chromosome 4 to the short arm of chromosome 2. He was referred for evaluation because of global developmental delay and seizure disorder. A karyotype performed at 4 1/2 months of age, by a laboratory elsewhere, reportedly showed a deletion of chromosome 4(p12). When we saw him, he had macrocephaly, hypotonia, psychomotor retardation, multiple minor congenital anomalies, and EEG abnormalities. Repeat chromosomes performed by our laboratory revealed that his karyotype was 46,XY,dir ins(2;4)(p24;p15.3p13). Fluorescence in situ hybridization (FISH) analysis, using chromosomes 2 and 4 painting probes confirmed that material from 4p has been translocated to 2p. Also, FISH analysis using the Wolf-Hirschhorn critical region probe revealed that both loci are intact. Parental chromosomes were normal. This complex rearrangement, though it appears balanced, probably might have resulted in either a structural loss of genetic material or functional loss of a gene action. Thus, his phenotype could be explained by this de novo insertion of chromosome 4 material into chromosome 2. There is no reported case of this specific chromosome rearrangement.
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Affiliation(s)
- A Asamoah
- Department of Pediatrics, Meharry Medical College, Nashville, Tennessee 37208, USA
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24
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Ashton-Prolla P, Gershin IF, Babu A, Neu RL, Zinberg RE, Willner JP, Desnick RJ, Cotter PD. Prenatal diagnosis of a familial interchromosomal insertion of Y chromosome heterochromatin. AMERICAN JOURNAL OF MEDICAL GENETICS 1997; 73:470-3. [PMID: 9415476 DOI: 10.1002/(sici)1096-8628(19971231)73:4<470::aid-ajmg17>3.0.co;2-o] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An apparently unbalanced karyotype containing an abnormal chromosome 11 was identified in a 16-week female fetus by analysis of cultured amniocytes. Fluorescence in situ hybridization (FISH) with a chromosome 11 paint identified the presence of an insertion in band 11q24. Parental karyotyping documented an unbalanced karyotype with the same der(11) chromosome in the phenotypically normal father. CBG-banding and FISH identified the insertion to be Yq12 heterochromatin: 46,XY, der(11)ins(11;Y)(q24;q12q12).ish der(11) (wcp11+,DYZ1+). The same der(11) chromosome was also found in the phenotypically normal paternal grandmother, demonstrating this additional Y chromosomal material did not affect normal female sexual development or fertility. The parents elected to continue the pregnancy and a normal girl was born at term, further confirming that this rare familial variant has no clinical significance. This case illustrates the importance of family studies, appropriate banding, and FISH analyses to accurately characterize apparent chromosomal abnormalities.
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Affiliation(s)
- P Ashton-Prolla
- Department of Human Genetics, Mount Sinai School of Medicine, New York, New York, USA
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25
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Nordgren A, Arver S, Kvist U, Carter N, Blennow E. Trisomy 5q12-->q13.3 in a patient with add(13q): characterization of an interchromosomal insertion by forward and reverse chromosome painting. AMERICAN JOURNAL OF MEDICAL GENETICS 1997; 73:351-5. [PMID: 9415698 DOI: 10.1002/(sici)1096-8628(19971219)73:3<351::aid-ajmg23>3.0.co;2-h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We report on a patient with azoospermia, mild mental retardation, and minor physical anomalies. Chromosome analysis demonstrated the presence of additional material on the long arm of one chromosome 13. Forward chromosome painting using chromosome-specific libraries showed an insertion of material from chromosome 5. Further characterization with flow sorting of the aberrant chromosome and amplification by DOP-PCR followed by reverse chromosome painting showed specific trisomy of 5q12-->q13.3.
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Affiliation(s)
- A Nordgren
- Department of Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
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26
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Hegmann KM, Spikes AS, Orr-Urtreger A, Shaffer LG. Segregation of a paternal insertional translocation results in partial 4q monosomy or 4q trisomy in two siblings. AMERICAN JOURNAL OF MEDICAL GENETICS 1996; 61:10-5. [PMID: 8741910 DOI: 10.1002/(sici)1096-8628(19960102)61:1<10::aid-ajmg2>3.0.co;2-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A genetics evaluation was requested for a 6-week-old infant with multiple congenital malformations including mild craniofacial anomalies, truncal hypotonia, hypospadias, and a ventriculoseptal defect. Blood obtained for chromosome analysis revealed an abnormal chromosome 4. Paternal chromosome analysis showed a 46,XY, inv ins (3;4)(p21.32;q25q21.2), inv(4)(p15.3q21.2) karyotype. Therefore, the proband's chromosome 4 was the unbalanced product of this insertional translocation from the father resulting in partial monosomy 4q. Additionally, the derivative 4 had a pericentric inversion which was also seen in the father's chromosome 4. During genetic counseling, the proband's 2-year-old brother was evaluated. He was not felt to be abnormal in appearance, but was described as having impulsive behavior. Chromosome analysis on this child revealed 46,XY,der(3)inv ins(3;4)(p21.32;q25q21.2)pat. This karyotype results in partial trisomy 4q. FISH using two-color "painting" probes for chromosomes 3 and 4 confirmed the G-banded interpretation in this family. The segregation seen in this family resulted in both reciprocal products being observed in the two children, with partial 4q monosomy showing multiple congenital anomalies, and partial 4q trisomy showing very few phenotypic abnormalities.
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Affiliation(s)
- K M Hegmann
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
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27
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Wang YT, Bajalica S, Han FY, Wang ZC, Bui TH, Xie YG. Direct and inverted reciprocal chromosome insertions between chromosomes 7 and 14 in a woman with recurrent miscarriages. AMERICAN JOURNAL OF MEDICAL GENETICS 1994; 52:349-51. [PMID: 7810568 DOI: 10.1002/ajmg.1320520319] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We present the first case of direct and inverted reciprocal chromosome insertions between human chromosomes 7 and 14, ascertained because of repeated spontaneous abortions. Prometaphase GTG banding analysis showed the karyotype to be 46, XX, inv ins (7;14)(7pter-->7q11.23::14q32.2-->14q 22::7q21.2-->7qter), dir ins(14;7)(14pter-->14q 22::7q11.23-->7q21.2::14q32.2-->14qter). Origins of the insertion have been confirmed by chromosome painting with libraries specific for chromosomes 7 and 14 using fluorescence in situ hybridization.
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Affiliation(s)
- Y T Wang
- Institute of Medical Genetics, Henan Province Hospital, Zheng Zhou, P. R. China
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28
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Ghaziuddin M, Sheldon S, Tsai LY, Alessi N. Abnormalities of chromosome 18 in a girl with mental retardation and autistic disorder. JOURNAL OF INTELLECTUAL DISABILITY RESEARCH : JIDR 1993; 37 ( Pt 3):313-317. [PMID: 8334323 DOI: 10.1111/j.1365-2788.1993.tb01288.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Structural autosome defects have rarely been described in autism. In this report, the authors describe the association of autism and mental retardation in a girl with mosaicism for a duplication of the long arm of chromosome 18 and a deletion of the short arm of chromosome 18.
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Affiliation(s)
- M Ghaziuddin
- Department of Child Psychiatry, University of Michigan, Ann Arbor 48109-0390
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29
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Chudley AE, Kovnats S, Ray M. Recognizable behavioral and somatic phenotype in patients with proximal interstitial 18q deletion: report on a new affected child and follow-up on the original reported familial cases. AMERICAN JOURNAL OF MEDICAL GENETICS 1992; 43:535-8. [PMID: 1605245 DOI: 10.1002/ajmg.1320430307] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We describe a moderately retarded boy with a chromosome 18 deletion involving the regions q11.2q12.2. His phenotype is similar to that of other reported cases of proximal interstitial deletions involving 18q. We also provide follow-up information on the first 4 cases of proximal interstitial deletion of 18q from a family with a complex chromosome rearrangement originally reported in 1974.
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Affiliation(s)
- A E Chudley
- Department of Pediatrics, University of Manitoba, Children's Hospital, Winnipeg, Canada
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30
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Krasikov N, Thompson K, Sekhon GS. Monosomy 18q12.1----21.1: a recognizable aneuploidy syndrome? Report of a patient and review of the literature. AMERICAN JOURNAL OF MEDICAL GENETICS 1992; 43:531-4. [PMID: 1376552 DOI: 10.1002/ajmg.1320430306] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This report of a patient with an interstitial deletion 18q and review of previously described cases suggest a clinically recognizable syndrome. The phenotype appears to result from a microdeletion of part of 18q12.2 or q12.3, or a deletion of parts of both bands.
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Affiliation(s)
- N Krasikov
- Vivigen Laboratories, Santa Fe, New Mexico 87505
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31
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Abstract
A direct intrachromosome insertion of chromosome 7 is described, and previous reports of intrachromosomal insertions are listed. All others were ascertained through a phenotypically abnormal proband. Ours is the first presenting with multiple pregnancy losses. Since the risk of chromosomally abnormal liveborns is appreciable, prenatal diagnosis should be made available to known carriers of chromosome insertions.
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Affiliation(s)
- S A Farrell
- Division of Genetics, Credit Valley Hospital, Mississauga, Ontario, Canada
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32
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Abstract
We describe the phenotype of a child having a recombinant chromosome 3 with a duplication 3q13.2----q25 derived from a paternal inv ins(3)(p25.3q25q13.2). A review of 27 reported cases of intrachromosomal insertions has revealed that for a carrier of intrachromosomal insertion the risk of a child with an unbalanced karyotype is 15%. This risk may be higher for particular insertions. The recombinant chromosome can have a duplication or a deletion of different segments depending on whether the insertion is direct or inverted, paracentric or pericentric, and whether there is meiotic crossing over in the inserted or the interstitial non-inserted segment. Several of the insertions have been difficult to interpret and some of them have been mistaken for paracentric inversions. Caution is therefore indicated in interpreting parental karyotypes of a child with a deletion or a duplication, particularly if it is interstitial. This is because, whereas a risk of recurrence of a child with an unbalanced karyotype is low in de novo cases and for carriers of paracentric inversions, it is high for carriers of insertions.
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Affiliation(s)
- K Madan
- Department of Clinical Genetics, Free University Hospital, Amsterdam, The Netherlands
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33
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Hastings R, Hamer B, Roth S, Lucas M. Partial trisomy 4p resulting from a balanced intrachromosomal insertion, 4(q313p14p16). Clin Genet 1990; 38:121-5. [PMID: 2170065 DOI: 10.1111/j.1399-0004.1990.tb03559.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Partial trisomy 4p was found in a child with dysmorphic features. Cytogenetic investigations in the parents revealed an intrachromosomal insertion in the mother, 46,XX,ins (4) (q313p14p16). The proband was trisomic for 4p(p14p16) as a result of a recombination event in the mother's chromosome 4 at meiosis. The clinical features of the proband are compared with those found in the literature.
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Affiliation(s)
- R Hastings
- Department of Genetics & Biometry, Galton Laboratories, University College, London, U.K
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34
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Wilson GN, Heller KB, Elterman RD, Schneider NR. Partial trisomy 18 with minimal anomalies: lack of correspondence between phenotypic manifestations and triplicated loci along chromosome 18. AMERICAN JOURNAL OF MEDICAL GENETICS 1990; 36:506-10. [PMID: 1697142 DOI: 10.1002/ajmg.1320360427] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A 2-year-old boy with microcephaly, developmental delay, and minimal anomalies was found to have an extra submetacentric chromosome equivalent to 18pter----q12. Review of the phenotypes produced by various triplicated 18 regions supports the hypothesis that no one chromosome 18 region is sufficient to produce the phenotype of trisomy 18. The mild phenotype of trisomy 18p, the variable phenotype of trisomy 18pter----q12, and the discontinuous phenotype of triplication for band 18q12 alone emphasizes that the contribution of triplicated loci to the phenotype is neither additive nor invariant.
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Affiliation(s)
- G N Wilson
- Department of Pediatrics, University of Texas Southwestern Medical Center, Children's Medical Center of Dallas
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35
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Wilson GN, Al Saadi AA. Obesity and abnormal behaviour associated with interstitial deletion of chromosome 18 (q12.2q21.1). J Med Genet 1989; 26:62-3. [PMID: 2918529 PMCID: PMC1015541 DOI: 10.1136/jmg.26.1.62] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- G N Wilson
- Department of Pediatrics, William Beaumont Hospital, Royal Oak, Michigan 48072-2735
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36
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Abuelo DN, Barsel-Bowers G, Richardson A. Insertional translocations: report of two new families and review of the literature. AMERICAN JOURNAL OF MEDICAL GENETICS 1988; 31:319-29. [PMID: 2852898 DOI: 10.1002/ajmg.1320310209] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We describe two families with insertional translocations. In the first, a large family ascertained because of repeated pregnancy loss, the insertional translocation, ins(1;3)(q32;p13pter), was found to be segregating through three generations. In the second family, ascertained through a proposita with congenital malformations, multiple spontaneous abortions also occurred. The father had an insertional translocation, inv 4(p14,q21.1)ins(7,4)(q32;q21.1 q23). These cases illustrate that recurrent fetal wastage may be caused by insertional translocations and in fact may be the only clinical manifestation of this unusual type of chromosome rearrangement.
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MESH Headings
- Chromosomes, Human, Pair 1
- Chromosomes, Human, Pair 3
- Chromosomes, Human, Pair 4
- Chromosomes, Human, Pair 7
- DNA Transposable Elements
- Female
- Humans
- Infant, Newborn
- Karyotyping
- Male
- Pedigree
- Translocation, Genetic
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Affiliation(s)
- D N Abuelo
- Genetic Counseling Center, Rhode Island Hospital, Department of Pediatrics, Providence 02902
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37
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Gustavson KH, Lundberg PO, Nicol P. Familial partial trisomy 5p resulting from segregation of an insertional translocation. Clin Genet 1988; 33:404-9. [PMID: 3168312 DOI: 10.1111/j.1399-0004.1988.tb03472.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A case of duplication of segment p13-p15 of the short arm of chromosome 5 as the result of an insertional translocation in a mentally retarded girl with congenital anomalies is reported. Some of the apparently balanced carriers of the inverted insertion showed minor congenital anomalies.
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Affiliation(s)
- K H Gustavson
- Department of Clinical Genetics, Academic Hospital, Uppsala, Sweden
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38
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Yip MY, Selikowitz M, Don N, Kovacic A, Purvis-Smith S, Lam-Po-Tang PR. Deletion 15q21.1----q22.1 resulting from a paternal insertion into chromosome 5. J Med Genet 1987; 24:709-12. [PMID: 3430549 PMCID: PMC1050353 DOI: 10.1136/jmg.24.11.709] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A 15 month old boy with an interstitial deletion 15q derived from a paternal insertion (5;15)(q31.3;q21.1q22.1) is described and compared with one other reported case. A beak like nose with hypoplastic nasal alae, a thin upper lip, failure to thrive in infancy with later onset of obesity, and severe mental retardation are features common to both.
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Affiliation(s)
- M Y Yip
- Cytogenetics Unit, Prince of Wales Hospital, Sydney, Australia
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39
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Walker AP, Bocian M. Partial duplication 8q12----q21.2 in two sibs with maternally derived insertional and reciprocal translocations: case reports and review of partial duplications of chromosome 8. AMERICAN JOURNAL OF MEDICAL GENETICS 1987; 27:3-22. [PMID: 3300332 DOI: 10.1002/ajmg.1320270103] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report on two sibs with duplication of the segment 8q12----8q21.2 resulting from malsegregation of a maternal insertional translocation: [inv ins (5;8)(p13;q12q21.2)]. The mother also carries a reciprocal translocation [t(1;6)(q31;q5)], which was transmitted in the balanced state to the propositi and to a phenotypically normal son and daughter. The literature on two translocations occurring in one individual and on insertional rearrangements is reviewed in terms of reproductive risks to balanced carriers. The two affected infants have a previously undescribed partial duplication of an interstitial segment of 8q and a pattern of abnormalities distinct from those seen in other partial duplications of 8. These infants are reviewed with 78 other cases of partial duplications of chromosome 8 with regard to phenotype-karyotype correlations.
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40
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Felding I, Kristoffersson U, Sjöström H, Norén O. Contribution to the 18q- syndrome. A patient with del(18) (q22.3qter). Clin Genet 1987; 31:206-10. [PMID: 3109789 DOI: 10.1111/j.1399-0004.1987.tb02797.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A patient with the typical features of the 18q- syndrome, but with the deletion restricted to the most distal part, bands q22.3----qter is reported. The cytogenetic finding is supported by a decrease in activity of the enzyme peptidase A.
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41
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Bernstein R, Pinto MR, Kromberg J, Wagner J, Jenkins T. Segregation patterns and phenotypes of unbalanced offspring in a large family with (10;18) chromosome translocation. AMERICAN JOURNAL OF MEDICAL GENETICS 1985; 22:727-42. [PMID: 4073123 DOI: 10.1002/ajmg.1320220409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We describe a large family in whom a balanced 10;18 chromosome translocation is segregating through five generations. Six severely mentally retarded relatives and an abnormal fetus further define the phenotypic expression of dup (18q21----qter). Other segregants detected prenatally included a fetus with deletion 18q21----qter and two fetuses with dup(18pter----q21) owing to tertiary trisomy. One of the latter also had an extra X chromosome; this might be another example of possible nonhomologous pairing in man.
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42
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Razavi-Encha F, Raoul O, Lescs MC, Danan C. Phenotype-karyotype correlations in dup(18q): report of a case and review. AMERICAN JOURNAL OF MEDICAL GENETICS 1985; 21:591-5. [PMID: 4025391 DOI: 10.1002/ajmg.1320210321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report on a case of dup(18q) due to de novo translocation 46,XX,-21,t(18;21)(18qter----cen----21qter). The patient had many characteristic signs of full trisomy 18 except for internal organ malformations and early death. We review the phenotype-karyotype correlations between full trisomy 18 and dup(18q) and discuss the possibility of the existence of "critical zone(s)" at the proximal or/and distal region of 18q responsible for most signs of trisomy 18, such as congenital heart defect and early death.
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43
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Moller M, García-Cruz D, Rivera H, Sánchez-Corona J, Cantú JM. Pure monosomy and trisomy 2q24.2----q3105 due to an inv ins(7;2)(q21.2;q3105q24.2) segregating in four generations. Hum Genet 1984; 68:77-86. [PMID: 6500560 DOI: 10.1007/bf00293878] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An inv ins(7;2)(q21.2;q3105q24.2) was found to segregate through four generations of a family. Adjacent-1 segregation aneusomies were ascertained in five patients: three monosomics and two trisomics; and the corresponding syndromes were delineated. The comparative analysis between these and other previously described 2q aneusomic individuals led to the conclusion that a large cleft between first and second toes is a constant feature in monosomy 2q24----q31. No other trait could plausibly be mapped. Risks of 7.9 to 31.6% for aneusomic children and of 26.3% for abortion were estimated in the present family.
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44
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Watt JL, Couzin DA, Lloyd DJ, Stephen GS, McKay E. A familial insertion involving an active nucleolar organiser within chromosome 12. J Med Genet 1984; 21:379-84. [PMID: 6502652 PMCID: PMC1049324 DOI: 10.1136/jmg.21.5.379] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
As far as the authors are aware this is the first report of the insertion of an active NOR into a non-acrocentric chromosome, although a simple translocation involving an active NOR has been previously recorded. More specifically, this case involves the non-reciprocal translocation of the centromere and stalk of an acrocentric into 12p, generating an apparently stable dicentric chromosome. The insertion is seen in three generations and may be relatively genetically benign. The abnormality is fully described by G and sequential C banding, DA/DAPI fluorescence, kinetochore staining, and Ag-NOR staining, and the findings are discussed in the light of the limited published reports of insertion in man.
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45
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de Arce MA, Law E, Martin L, Masterson JG. A case of inverted insertion assessed by R and G banding. J Med Genet 1982; 19:148-51. [PMID: 6176711 PMCID: PMC1048848 DOI: 10.1136/jmg.19.2.148] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Cytogenetic studies in a 2-year-old boy referred to our laboratory for developmental delay showed an unusual karyotype with a three break rearrangement. R and G banding were both necessary to determine the exact nature of the rearrangement which is described as 46, XY,inv ins(16;3)(q22;p26p13). Several features coincide with the reported description of another patient where 3p26 was missing, and the coincidence is explained as a position effect.
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46
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Grass FS, Schwartz RP, Deal JO, Parke JC. Gonadal dysgenesis, intra-X chromosome insertion, and possible position effect in an otherwise normal female. Clin Genet 1981; 20:28-35. [PMID: 7296945 DOI: 10.1111/j.1399-0004.1981.tb01802.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A 16-year-old female was referred for cytogenetic evaluation because of primary amenorrhea. Growth, mental development, and physical examination, including secondary sexual characteristics, were normal. Cytogenetic analysis revealed one X chromosome to be consistently more metacentric than the other. Measurements indicted no significant differences between the two X's, but in the abnormal X, the increase in length of the short arm matched the decrease in length of the long arm. Banding studies suggest that region q22 through q24 of the abnormal X is inserted into region p11 of the same chromosome. Endocrine studies were indicative of gonadal dysgenesis. Since no loss of X chromosome material is involved, this patient's gonadal dysgenesis is most likely related to position effect.
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47
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Matsuoka R, Matsuyama S, Yamamoto Y, Kuroki Y, Matsui I. Trisomy 18q. A case report and review of karyotype-phenotype correlations. Hum Genet 1981; 57:78-82. [PMID: 7262872 DOI: 10.1007/bf00271173] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A 2-month-old male infant with partial trisomy 18, 46,XY,der(4),t(q35;q21.1)mat, was presented. Except for atypical facies, he had many of the significant signs of full trisomy 18. Phenotype-karyotype correlations based on the data of our case and those from the literature were discussed. Major features of trisomy 18, such as congenital heart disease, early death, and external malformations, appear to be consistently related to the trisomic state of 18q21. Characteristic congenital heart diseases in trisomy 18 were polyvalvular disease in 100%, membranous ventricular septal defect, patent ductus arteriosus, and high take-off of the right coronary ostium. Pathology of the heart did not differ between full and partial 18-trisomy cases.
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Turleau C, Chavin-Colin F, Narbouton R, Asensi D, de Grouchy J. Trisomy 18q-. Trisomy mapping of chromosome 18 revisited. Clin Genet 1980; 18:20-6. [PMID: 7418250 DOI: 10.1111/j.1399-0004.1980.tb01359.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Two patients with trisomy for 18p and the proximal segment of 18q (trisomy 18q-) are reported and compared with similar cases from the literature. The phenotype of trisomy 18q- resembles that of full trisomy 18 but differs mainly in the birdlike face, small mouth, more pronounced microretrognathia, minor skeletal dysplasia and inner organ malformations, and less sever vital prognosis.
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Nielsen KB, Egede F, Mouridsen I, Mohr J. Familial partial 7q monosomy resulting from segregation of an insertional chromosome rearrangement. J Med Genet 1979; 16:461-6. [PMID: 537020 PMCID: PMC1012594 DOI: 10.1136/jmg.16.6.461] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A family with an insertional type of chromosome rearrangement involving chromosomes 7 and 13 is reported. An interstitial deletion of a segment of chromosome 7 (7q32 leads to 34) had been inserted into the long arm of chromosome 13 at breakpoint q32. Segregation of this chromosome rearrangement gave rise to three subjects who were monosomic for the involved segment of chromosome 7. The karyotypes were: 46,XX, or XY,der(7)ins(13;7) (q32;q32q34). All three subjects were mentally retarded and had minor dysmorphic features. The Kidd, Colton, and Kell blood group systems were investigated, but were not informative.
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Emanuel BS, Zackai EH, Moreau L, Coates P, Orrechio E. Interstitial deletion 13q33 resulting from maternal insertional translocation. Clin Genet 1979; 16:340-6. [PMID: 293234 DOI: 10.1111/j.1399-0004.1979.tb01013.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A 32-month-old female with a unique interstitial deletion of 13q is presented, including cytogenetic and gene marker studies. The deleted 13 in the patient is a result of malsegregation of a maternal insertional translocation involving chromosomes 7 and 13, 46,XX,ins(7;13)(q22;q32q34). The demonstration of two esterase D alleles in this patient excludes band 13q33 as the site of the ESD locus, previously assigned to the distal long arm of chromosome 13. The BUdR dye studies reveal that the replicative pattern for 13q31 and 13q21 is not altered by deletion of 13q33 and permit precise delineation of the breakpoints of the rearrangement.
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