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de Carvalho AFL, Alves ES, Pitanga PML, Ribeiro EM, Doriqui MJR, Toralles MBP, Topázio BA, dos Santos JF, de Lima RLLF, Kulikowski LD, Acosta AX. Identifying Genetic Etiology in Patients with Intellectual Disability: An Experience in Public Health Services in Northeastern Brazil. J Pediatr Genet 2022. [DOI: 10.1055/s-0042-1757888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
AbstractIntellectual disability (ID) is considered a common neuropsychiatric disorder that affects up to 3% of the population. The etiologic origin of ID may be genetic, environmental, and multifactorial. Chromosomopathies are relatively common among the genetic causes of ID, especially in the most severe cases and those associated with dysmorphic features. Currently, the application of new molecular cytogenetics technologies has increasingly allowed the identification of microdeletions, microduplications, and unbalanced translocations as causes of ID. The objective of this study was to investigate the etiology of ID in patients admitted to a public hospital in Northeastern Brazil. In total, 119 patients with ID who had normal karyotypes and fragile X exams participated in this study. The patients were initially physically examined for microdeletion syndromes and then tested using fluorescence in situ hybridization (FISH), multiplex ligation-dependent probe amplification (MLPA), methylation-sensitive polymerase chain reaction (MS-PCR), and chromosome microarray analysis (CMA), according to clinical suspicion. Patients with no diagnoses after FISH, MLPA, and/or MS-PCR evaluations were subsequently tested by CMA. The rate of etiologic diagnoses of ID in the current study was 28%. FISH diagnosed 25 out of 79 tested (31%), MLPA diagnosed 26 out of 79 tested (32%), MS-PCR diagnosed 7 out of 20 tested (35%), and the single nucleotide polymorphism array diagnosed 6 out of 27 tested (22%). Although the CMA is the most complete and recommended tool for the diagnosis of microdeletions, microduplications, and unbalance translocations in patients with ID, FISH, MLPA, and MS-PCR testing can be used as the first tests for specific syndromes, as long as the patients are first physically screened clinically, especially in the public health networks system in Brazil, where resources are scarce.
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Affiliation(s)
| | - Esmeralda Santos Alves
- Laboratory of Human Genetics and Mutagenesis, Institute of Biology, Federal University Bahia (UFBA), Salvador, Bahia, Brazil
| | - Paula Monique Leite Pitanga
- Laboratory of Human Genetics and Mutagenesis, Institute of Biology, Federal University Bahia (UFBA), Salvador, Bahia, Brazil
| | - Erlane Marques Ribeiro
- Faculty of Medicine Estacio of Juazeiro Norte, Estacio-FMJ, Hospital Infantil Albert Sabin, Fortaleza, Ceará, Brazil
| | | | - Maria Betânia Pereira Toralles
- Medical School of Medicine, Medical Genetic Service – Edgard Santos Teaching Hospital/Federal University of Bahia, Salvador, Bahia, Brazil
| | - Bianca Arcaro Topázio
- Laboratory of Human Genetics and Mutagenesis, Institute of Biology, Federal University Bahia (UFBA), Salvador, Bahia, Brazil
| | - Jéssica Fernandes dos Santos
- Laboratory of Human Genetics and Mutagenesis, Institute of Biology, Federal University Bahia (UFBA), Salvador, Bahia, Brazil
| | | | | | - Angelina Xavier Acosta
- Medical School of Medicine, Medical Genetic Service – Edgard Santos Teaching Hospital/Federal University of Bahia, Salvador, Bahia, Brazil
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2
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Sams EI, Ng JK, Tate V, Claire Hou YC, Cao Y, Antonacci-Fulton L, Belhassan K, Neidich J, Mitra RD, Cole FS, Dickson P, Milbrandt J, Turner TN. From karyotypes to precision genomics in 9p deletion and duplication syndromes. HGG ADVANCES 2022; 3:100081. [PMID: 35047865 PMCID: PMC8756500 DOI: 10.1016/j.xhgg.2021.100081] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 12/21/2021] [Indexed: 11/27/2022] Open
Abstract
While 9p deletion and duplication syndromes have been studied for several years, small sample sizes and minimal high-resolution data have limited a comprehensive delineation of genotypic and phenotypic characteristics. In this study, we examined genetic data from 719 individuals in the worldwide 9p Network Cohort: a cohort seven to nine times larger than any previous study of 9p. Most breakpoints occur in bands 9p22 and 9p24, accounting for 35% and 38% of all breakpoints, respectively. Bands 9p11 and 9p12 have the fewest breakpoints, with each accounting for 0.6% of all breakpoints. The most common phenotype in 9p deletion and duplication syndromes is developmental delay, and we identified eight known neurodevelopmental disorder genes in 9p22 and 9p24. Since it has been previously reported that some individuals have a secondary structural variant related to the 9p variant, we examined our cohort for these variants and found 97 events. The top secondary variant involved 9q in 14 individuals (1.9%), including ring chromosomes and inversions. We identified a gender bias with significant enrichment for females (p = 0.0006) that may arise from a sex reversal in some individuals with 9p deletions. Genes on 9p were characterized regarding function, constraint metrics, and protein-protein interactions, resulting in a prioritized set of genes for further study. Finally, we achieved precision genomics in one child with a complex 9p structural variation using modern genomic technologies, demonstrating that long-read sequencing will be integral for some cases. Our study is the largest ever on 9p-related syndromes and provides key insights into genetic factors involved in these syndromes.
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Affiliation(s)
- Eleanor I. Sams
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jeffrey K. Ng
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Victoria Tate
- Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Ying-Chen Claire Hou
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Yang Cao
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | - Khadija Belhassan
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Julie Neidich
- Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Robi D. Mitra
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - F. Sessions Cole
- Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Patricia Dickson
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
- Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jeffrey Milbrandt
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
- McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO 63110, USA
- Needleman Center for Neurometabolism and Axonal Therapeutics, St. Louis, MO, USA
| | - Tychele N. Turner
- Department of Genetics, Washington University School of Medicine, St. Louis, MO 63110, USA
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Mohamed AM, Kamel AK, Eid MM, Eid OM, Mekkawy M, Hussein SH, Zaki MS, Esmail S, Afifi HH, El-Kamah GY, Otaify GA, El-Awady HA, Elaidy A, Essa MY, El-Ruby M, Ashaat EA, Hammad SA, Mazen I, Abdel-Salam GMH, Aglan M, Temtamy S. Chromosome 9p terminal deletion in nine Egyptian patients and narrowing of the critical region for trigonocephaly. Mol Genet Genomic Med 2021; 9:e1829. [PMID: 34609792 PMCID: PMC8606205 DOI: 10.1002/mgg3.1829] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 05/22/2021] [Accepted: 09/07/2021] [Indexed: 11/30/2022] Open
Abstract
Background This study aimed to delineate the clinical phenotype of patients with 9p deletions, pinpoint the chromosomal breakpoints, and identify the critical region for trigonocephaly, which is a frequent finding in 9p terminal deletion. Methods We investigated a cohort of nine patients with chromosome 9p terminal deletions who all displayed developmental delay, intellectual disability, hypotonia, and dysmorphic features. Of them, eight had trigonocephaly, seven had brain anomalies, seven had autistic manifestations, seven had fair hair, and six had a congenital heart defect (CHD). Results Karyotyping revealed 9p terminal deletion in all patients, and patients 8 and 9 had additional duplication of other chromosomal segments. We used six bacterial artificial chromosome (BAC) clones that could identify the breakpoints at 17–20 Mb from the 9p terminus. Array CGH identified the precise extent of the deletion in six patients; the deleted regions ranged from 16 to 18.8 Mb in four patients, patient 8 had an 11.58 Mb deletion and patient 9 had a 2.3 Mb deletion. Conclusion The gene deletion in the 9p24 region was insufficient to cause ambiguous genitalia because six of the nine patients had normal genitalia. We suggest that the critical region for trigonocephaly lies between 11,575 and 11,587 Mb from the chromosome 9p terminus. To the best of our knowledge, this is the minimal critical region reported for trigonocephaly in 9p deletion syndrome, and it warrants further delineation.
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Affiliation(s)
- Amal M Mohamed
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Alaa K Kamel
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Maha M Eid
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Ola M Eid
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Mona Mekkawy
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Shymaa H Hussein
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Maha S Zaki
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Samira Esmail
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Hanan H Afifi
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Ghada Y El-Kamah
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Ghada A Otaify
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Heba Ahmed El-Awady
- Department of Pediatrics, Faculty of Medicine, Fayoum University, Fayoum, Egypt
| | - Aya Elaidy
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Mahmoud Y Essa
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Mona El-Ruby
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Engy A Ashaat
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Saida A Hammad
- Division of Human Genetics and Genome Research, Department of Human Cytogenetics, National Research Centre, Cairo, Egypt
| | - Inas Mazen
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Ghada M H Abdel-Salam
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Mona Aglan
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
| | - Samia Temtamy
- Division of Human Genetics and Genome Research, Department of Clinical Genetics, National Research Centre, Cairo, Egypt
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Pinto IP, Minasi LB, Steckelberg R, da Silva CC, da Cruz AD. Mosaic Tetrasomy of 9p24.3q21.11 postnatally identified in an infant born with multiple congenital malformations: a case report. BMC Pediatr 2018; 18:298. [PMID: 30193577 PMCID: PMC6128999 DOI: 10.1186/s12887-018-1275-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 09/03/2018] [Indexed: 01/06/2023] Open
Abstract
Background Supernumerary Marker Chromosomes consist in structurally abnormal chromosomes, considered as an extra chromosome in which around 70% occur as a de novo event and about 30% of the cases are mosaic. Tetrasomy 9p is a rare chromosomal abnormality described as the presence of a supernumerary isochromosome 9p. Clinical features of tetrasomy 9p include a variety of physical and developmental abnormalities. Case presentation Herein, we reported a postnatal case of a newborn who died in early infancy with multiple congenital malformations due to a mosaic de novo tetrasomy 9p detected by Chromosomal Microarray Analysis. Conventional cytogenetics analysis of the proband was 47,XY,+mar[45]/46,XY[5]. The parental karyotypes presented no visible numerical or structural alterations. Microarray Analysis of the proband revealed that the marker chromosome corresponded to a mosaic de novo gain at 9p24.3q21.11. Conclusions Chromosomal Microarray Analysis was helpful to identify the origin of the supernumerary marker chromosome and it was a powerful tool to carry out genetic diagnostic, guiding the medical diagnosis. Furthermore, the CMA allowed observing at the first time in Central Brazil the tetrasomy 9p and partial tetrasomy 9q in mosaic, encompassing a large duplicated region with several morbid genes, in an infant with multiple congenital malformations.
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Affiliation(s)
- Irene Plaza Pinto
- Biotechnology and Biodiversity PhD Program, Federal University of Goias, Rede Centro Oeste de Pós-Graduação de Pesquisa e Inovação, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil. .,Replicon Research Group, Department of Biology, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.
| | - Lysa Bernardes Minasi
- Replicon Research Group, Department of Biology, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Genetics Master's Program, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil
| | - Raphael Steckelberg
- Maternity Hospital Amparo, Av T-12 n° 280 Setor Bueno, Goiânia, GO, Brazil.,Dr Henrique Santillo Rehabilitation and Readjustment Center, Av. Ver. José Monteiro, 1655, Setor Negrão de Lima, Goiânia, GO, Brazil
| | - Claudio Carlos da Silva
- Biotechnology and Biodiversity PhD Program, Federal University of Goias, Rede Centro Oeste de Pós-Graduação de Pesquisa e Inovação, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Replicon Research Group, Department of Biology, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Genetics Master's Program, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Human Cytogenetics and Molecular Genetics Laboratory, Secretary of Goias State for Public Health, Goiânia, GO, Brazil.,State University of Goias, Eseffego, Goiânia, Goiás, Brazil
| | - Aparecido Divino da Cruz
- Biotechnology and Biodiversity PhD Program, Federal University of Goias, Rede Centro Oeste de Pós-Graduação de Pesquisa e Inovação, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Replicon Research Group, Department of Biology, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Genetics Master's Program, Pontifical Catholic University of Goias, Rua 235, n. 40, Setor Leste Universitário, Goiânia, GO, 74605-050, Brazil.,Human Cytogenetics and Molecular Genetics Laboratory, Secretary of Goias State for Public Health, Goiânia, GO, Brazil
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5
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Yokoyama E, Del Castillo V, Sánchez S, Ramos S, Molina B, Torres L, Navarro MJ, Avila S, Castrillo JL, García-De Teresa B, Asch B, Frías S. Derivative chromosomes involving 5p large rearranged segments went unnoticed with the use of conventional cytogenetics. Mol Cytogenet 2018; 11:30. [PMID: 29760780 PMCID: PMC5941813 DOI: 10.1186/s13039-018-0374-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 03/27/2018] [Indexed: 11/10/2022] Open
Abstract
Background In countries where comparative genomic hybridization arrays (aCGH) and next generation sequencing are not widely available due to accessibility and economic constraints, conventional 400–500-band karyotyping is the first-line choice for the etiological diagnosis of patients with congenital malformations and intellectual disability. Conventional karyotype analysis can rule out chromosomal alterations greater than 10 Mb. However, some large structural abnormalities, such as derivative chromosomes, may go undetected when the analysis is performed at less than a 550-band resolution and the size and banding pattern of the interchanged segments are similar. Derivatives frequently originate from inter-chromosomal exchanges and sometimes are inherited from a parent who carries a reciprocal translocation. Case presentation We present two cases with derivative chromosomes involving a 9.1 Mb 5p deletion/14.8 Mb 10p duplication in the first patient and a 19.9 Mb 5p deletion/ 18.5 Mb 9p duplication in the second patient. These long chromosomal imbalances were ascertained by aCGH but not by conventional cytogenetics. Both patients presented with a deletion of the Cri du chat syndrome region and a duplication of another genomic region. Each patient had a unique clinical picture, and although they presented some features of Cri du chat syndrome, the phenotype did not conclusively point towards this diagnosis, although a chromosomopathy was suspected. Conclusions These cases highlight the fundamental role of the clinical suspicion in guiding the approach for the etiological diagnosis of patients. Molecular cytogenetics techniques, such as aCGH, should be considered when the clinician suspects the presence of a chromosomal imbalance in spite of a normal karyotype.
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Affiliation(s)
- Emiy Yokoyama
- 1Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - Victoria Del Castillo
- 1Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - Silvia Sánchez
- 2Laboratorio de Citogenética, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - Sandra Ramos
- 2Laboratorio de Citogenética, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - Bertha Molina
- 2Laboratorio de Citogenética, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - Leda Torres
- 2Laboratorio de Citogenética, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - María José Navarro
- 1Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | | | | | - Benilde García-De Teresa
- 2Laboratorio de Citogenética, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México
| | - Bárbara Asch
- Laboratorio Diagen, Hospital ABC Santa Fe, Cuidad de México, México
| | - Sara Frías
- 2Laboratorio de Citogenética, Departamento de Genética Humana, Instituto Nacional de Pediatría, Ciudad de México, México.,5Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Avenida IMAN no. 1, Torre de Investigación, Colonia Insurgentes Cuicuilco, Coyoacán, Ciudad de México Mexico
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Poot M. The Growing Complexity of the Monosomy 1p36 Syndrome. Mol Syndromol 2016; 7:49-50. [PMID: 27385960 DOI: 10.1159/000445138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2016] [Indexed: 11/19/2022] Open
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Martín-De Saro MD, Valdés-Miranda JM, Plaza-Benhumea L, Pérez-Cabrera A, Gonzalez-Huerta LM, Guevara-Yañez R, Cuevas-Covarrubias SA. Characterization of a Complex Chromosomal Rearrangement Involving a de novo Duplication of 9p and 9q and a Deletion of 9q. Cytogenet Genome Res 2016; 147:124-9. [PMID: 26900692 DOI: 10.1159/000444138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2015] [Indexed: 11/19/2022] Open
Abstract
Rearrangements of the distal region of 9p are important chromosome imbalances in human beings. Trisomy 9p is the fourth most frequent chromosome anomaly and is a clinically recognizable syndrome. Kleefstra syndrome, previously named 9q subtelomeric deletion syndrome, is either caused by a submicroscopic deletion in 9q34.3 or an intragenic mutation of EHMT1. We report a Mexican male patient with abnormal development, dysmorphism, systemic anomalies and a complex chromosomal rearrangement (CCR). GTG-banding revealed a 46,XY,add(9)(q34.3) karyotype, whereas array analysis resulted in arr[hg19] 9p24.3p23(203,861-11,842,172)×3, 9q34.3(138,959,881-139,753,294)×3, 9q34.3(139,784,913-141,020,389)×1. Array and karyotype analyses were normal in both parents. Partial duplication of 9p is one of the most commonly detected autosomal structural abnormalities in liveborn infants. A microdeletion in 9q34.3 corresponds to Kleefstra syndrome, whereas a microduplication in 9q34.3 shows a great clinical variability. Here, we present a CCR in a patient with multiple congenital anomalies who represents the first case with partial 9p trisomy, partial 9q trisomy and partial 9q monosomy.
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Lara-Navarro IJ, Córdova-Fletes C, García-Ruiz A, Rivera H. A further inv dup/del 9p de novo rearrangement. Reappraisal of 25 instances. GENE REPORTS 2015. [DOI: 10.1016/j.genrep.2015.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cakmak-Genc G, Karakas-Celik S, Dursun A, Piskin İE. Partial trisomy 4q and partial monosomy 9p in a girl with choanal atresia and various dysmorphic findings. Gene 2015; 568:211-4. [PMID: 25979671 DOI: 10.1016/j.gene.2015.05.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 05/08/2015] [Accepted: 05/11/2015] [Indexed: 11/15/2022]
Abstract
We report a new-born girl with partial trisomy of 4q28-qter and partial monosomy of 9p24-9ter. Our patient has choanal atresia, hypertelorism, wide nasal bridge, high arched palate, discrete nipples, heart defects, myoclonic seizures and various dysmorphic findings. Standard chromosomal analysis with G-banding with Trypsin-Giemsa revealed 46,XX,der(9)t(4;9)(q28;p24) resulting from the mother's t(4,9) (q28;p24) karyotype. Deletions of the terminal part of 9p and partial trisomy of chromosome 4q are rare chromosomal alterations. To our knowledge, this is the first report of choanal atresia in a patient with a partial trisomy of 4q28-qter and partial monosomy 9p24-9ter combination, which were detected by integrated cytogenetic and genomic analysis.
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Affiliation(s)
- Gunes Cakmak-Genc
- Bulent Ecevit University, Faculty of Medicine, Department of Medical Genetics, Zonguldak, Turkey.
| | - Sevim Karakas-Celik
- Bulent Ecevit University, Faculty of Medicine, Department of Medical Genetics, Zonguldak, Turkey
| | - Ahmet Dursun
- Bulent Ecevit University, Faculty of Medicine, Department of Medical Genetics, Zonguldak, Turkey
| | - İbrahim Etem Piskin
- Bulent Ecevit University, Faculty of Medicine, Department of Pediatrics, Zonguldak, Turkey
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Clinical and molecular delineation of duplication 9p24.3q21.11 in a patient with psychotic behavior. Gene 2015; 560:124-7. [PMID: 25667990 DOI: 10.1016/j.gene.2015.02.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 02/01/2015] [Accepted: 02/06/2015] [Indexed: 12/11/2022]
Abstract
This article describes a 19-year-old female with mild facial dysmorphism, asociality, decreased school performance, and psychotic behavior in whom the karyotype showed an extra-chromosomal marker characterized as 9p24.3-9q21.11 duplication by array-CGH. The 69Mbp duplicated segment in this patient includes the critical 9p duplication syndrome region, the GLDC and C90RF72 genes associated with psychotic behavior and other conduct disorders, and a potential locus for autism.
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11
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Post-zygotic breakage of a dicentric chromosome results in mosaicism for a telocentric 9p marker chromosome in a boy with developmental delay. Gene 2014; 533:403-10. [DOI: 10.1016/j.gene.2013.09.090] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 09/20/2013] [Accepted: 09/25/2013] [Indexed: 02/07/2023]
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