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Miao ZY, Chen SF, Wu H, Liu XY, Shao HY. Analysis of genetic characteristics of 436 children with dysplasia and detailed analysis of rare karyotype. Open Life Sci 2022; 17:416-425. [PMID: 35582623 PMCID: PMC9055171 DOI: 10.1515/biol-2022-0046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/30/2021] [Accepted: 01/03/2022] [Indexed: 11/15/2022] Open
Abstract
Abstract
Chromosomal abnormality is one of the important causes of dysplasia in children. However, due to regional and ethnic differences, the reported rates of chromosomal abnormalities in patients with dysplasia vary greatly. Moreover, the clinical manifestations in children with rare chromosomal diseases were heterogeneous. So, we retrospectively analyzed the karyotype results of 436 children with dysplasia and conducted a detailed analysis of rare chromosomal diseases. The results showed that chromosomal abnormalities were present in 181 of 436 cases. Intellectual disability, dysmorphology, congenital malformations, the disorder of sexual development, and short stature were the main five clinical symptoms in children with chromosomal abnormalities. Moreover, 136 cases of Trisomy 21 (Tri21) were detected, of which 130 were standard Tri21, 5 were robertsonian Tri21, and 1 was chimera type. In addition, 16 cases of rare abnormal karyotype, including complex Tri21, complex Turner syndrome, 4p-syndrome, 18q-syndrome, and 5p-syndrome, were also detected. In summary, chromosome abnormality is one of the important causes of dysplasia in children. Furthermore, prenatal screening and diagnosis could play a great significance in preventing dysplasia in children. In addition, the retrospective analysis of rare cases is valuable for clinical diagnosis and risk assessment of recurrence.
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Affiliation(s)
- Zong-Yu Miao
- Medical Laboratory, Yantai Yu Huang Ding Hospital , 20#, The East Road of Yu Huang Ding, Zhifu District, Yantai, 264000 , Shandong , China
| | - Shi-Feng Chen
- Medical Laboratory, Yantai Yu Huang Ding Hospital , 20#, The East Road of Yu Huang Ding, Zhifu District, Yantai, 264000 , Shandong , China
| | - Hong Wu
- Medical Laboratory, Yantai Yu Huang Ding Hospital , 20#, The East Road of Yu Huang Ding, Zhifu District, Yantai, 264000 , Shandong , China
| | - Xiao-Yan Liu
- Medical Laboratory, Yantai Yu Huang Ding Hospital , 20#, The East Road of Yu Huang Ding, Zhifu District, Yantai, 264000 , Shandong , China
| | - Hui-Yuan Shao
- Medical Laboratory, Yantai Yu Huang Ding Hospital , 20#, The East Road of Yu Huang Ding, Zhifu District, Yantai, 264000 , Shandong , China
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A rare familial rearrangement of chromosomes 9 and 15 associated with intellectual disability: a clinical and molecular study. Mol Cytogenet 2021; 14:47. [PMID: 34607577 PMCID: PMC8489072 DOI: 10.1186/s13039-021-00565-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/09/2021] [Indexed: 11/22/2022] Open
Abstract
Background There are many reports on rearrangements occurring separately in the regions of chromosomes 9p and 15q affected in the case under study. 15q duplication syndrome is caused by the presence of at least one extra maternally derived copy of the Prader–Willi/Angelman critical region. Trisomy 9p is the fourth most frequent chromosome anomaly with a clinically recognizable syndrome often accompanied by intellectual disability. Here we report a new case of a patient with maternally derived unique complex sSMC resulting in partial trisomy of both chromosomes 9 and 15 associated with intellectual disability. Case presentation We characterise a supernumerary derivative chromosome 15: 47,XY,+der(15)t(9;15)(p21.2;q13.2), likely resulting from 3:1 malsegregation during maternal gametogenesis. Chromosomal analysis showed that a phenotypically normal mother is a carrier of balanced translocation t(9;15)(p21.1;q13.2). Her 7-year-old son showed signs of intellectual disability and a number of physical abnormalities including bilateral cryptorchidism and congenital megaureter. The child’s magnetic resonance imaging showed changes in brain volume and in structural and functional connectivity revealing phenotypic changes caused by the presence of the extra chromosome material, whereas the mother’s brain MRI was normal. Sequence analyses of the microdissected der(15) chromosome detected two breakpoint regions: HSA9:25,928,021-26,157,441 (9p21.2 band) and HSA15:30,552,104-30,765,905 (15q13.2 band). The breakpoint region on chromosome HSA9 is poor in genetic features with several areas of high homology with the breakpoint region on chromosome 15. The breakpoint region on HSA15 is located in the area of a large segmental duplication. Conclusions We discuss the case of these phenotypic and brain MRI features in light of reported signatures for 9p partial trisomy and 15 duplication syndromes and analyze how the genomic characteristics of the found breakpoint regions have contributed to the origin of the derivative chromosome. We recommend MRI for all patients with a developmental delay, especially in cases with identified rearrangements, to accumulate more information on brain phenotypes related to chromosomal syndromes. Supplementary Information The online version contains supplementary material available at 10.1186/s13039-021-00565-y.
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Prenatal diagnosis of the Dandy–Walker malformation associated with partial trisomy 12p and distal 15q deletion. J Genet 2021. [DOI: 10.1007/s12041-021-01290-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zhang N, Qi Z, Zhang X, Zhong F, Yao H, Xu X, Liu J, Huang Y. Dandy-Walker syndrome associated with syringomyelia in an adult: a case report and literature review. J Int Med Res 2019; 47:1771-1777. [PMID: 30799663 PMCID: PMC6460593 DOI: 10.1177/0300060518808961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Dandy-Walker syndrome associated with syringomyelia is a rare condition, with few reports of adult cases. We describe an adult case of Dandy-Walker syndrome with concomitant syringomyelia. A 33-year-old man presented with a 3-month history of walking instability, numbness in the hands, memory deterioration, and urinary incontinence. A physical examination showed a positive Romberg sign. Brain computed tomography and magnetic resonance imaging showed hydrocephalus, a cyst in the posterior fossa, absence of the cerebellar vermis, hypoplasia of the corpus callosum and cerebella, and syringomyelia. All of these symptoms were consistent with the diagnosis of Dandy-Walker syndrome. Surgery involving arachnoid adhesiolysis and endoscopic third ventriculostomy was performed. At the 6-month follow-up, the symptoms were completely relieved. Magnetic resonance imaging showed that syringomyelia was greatly reduced and the hydrocephalus remained unchanged. Dandy-Walker syndrome with concomitant syringomyelia in adults is exceedingly rare. Early diagnosis and appropriate surgical treatment of this condition should be highlighted. Combined arachnoid adhesiolysis and endoscopic third ventriculostomy may be an effective approach.
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Affiliation(s)
- Nan Zhang
- 1 Department of Neurosurgery, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Zhenyu Qi
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
| | - Xuewen Zhang
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
| | - Fangping Zhong
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
| | - Hui Yao
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
| | - Xiang Xu
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
| | - Jiangang Liu
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
| | - Yulun Huang
- 2 Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, Suzhou, China
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López‐Félix J, Flores‐Gallegos L, Garduño‐Zarazúa L, Leis‐Márquez T, Juárez‐García L, Meléndez‐Hernández R, Castelazo‐Morales E, Mayén‐Molina D. Partial trisomy 9: prenatal diagnosis and recurrence within same family. Clin Case Rep 2017; 5:986-992. [PMID: 28588852 PMCID: PMC5457999 DOI: 10.1002/ccr3.970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 10/03/2016] [Accepted: 03/05/2017] [Indexed: 12/14/2022] Open
Abstract
Trisomy 9 can be suspected and confirmed in the prenatal period since the 11–13.6 weeks of screening. In cases of partial trisomy 9, the diagnosis is important especially to counseling the couple due to the increased likelihood of recurrence in subsequent pregnancies.
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Samanta D, Ramakrishnaiah R. Novel brain magnetic resonance imaging finding in a patient with trisomy 9p syndrome. Acta Neurol Belg 2015; 115:431-2. [PMID: 25527390 DOI: 10.1007/s13760-014-0410-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 12/12/2014] [Indexed: 10/24/2022]
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Tonni G, Lituania M, Chitayat D, Bonasoni MP, Keating S, Thompson M, Shannon P. Complete trisomy 9 with unusual phenotypic associations: Dandy-Walker malformation, cleft lip and cleft palate, cardiovascular abnormalities. Taiwan J Obstet Gynecol 2015; 53:592-7. [PMID: 25510707 DOI: 10.1016/j.tjog.2014.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2014] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE Trisomy 9 is a rare chromosomal abnormality usually associated with first-trimester miscarriage; few fetuses survive until the second trimester. We report two new cases of complete trisomy 9 that both present unusual phenotypic associations, and we analyze the genetic pathway involved in this chromosomal abnormality. CASE REPORT The first fetus investigated showed Dandy-Walker malformation, cleft lip, and cleft palate) at the second trimester scan. Cardiovascular abnormalities were characterized by a right-sided, U-shaped aortic arch associated with a ventricular septal defect (VSD). Symmetrical intrauterine growth restriction and multicystic dysplastic kidney disease were associated findings. The second fetus showed a dysmorphic face, bilateral cleft lip, hypoplastic corpus callosum, and a Dandy-Walker malformation. Postmortem examination revealed cardiovascular abnormalities such as persistent left superior vena cava draining into the coronary sinus, membranous ventricular septal defect, overriding aorta, pulmonary valve with two cusps and three sinuses, and the origin of the left subclavian artery distal to the junction of ductus arteriosus and aortic arch. CONCLUSION Complete trisomy 9 may result in a wide spectrum of congenital abnormalities, and the presented case series contributes further details on the phenotype of this rare aneuploidy.
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Affiliation(s)
- Gabriele Tonni
- Department of Obstetrics and Gynecology, Prenatal Diagnostic Service, Guastalla Civil Hospital, Azienda Unità Sanitaria Locale Reggio Emilia, Reggio Emilia, Italy.
| | - Mario Lituania
- Preconceptional and Prenatal Diagnostic Center, Istituto di Ricerca a Carettere Clinico Scientifico Galliera Hospital, Genoa, Italy
| | - David Chitayat
- Department of Obstetrics and Gynecology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Maria Paola Bonasoni
- Pathology Service, Istituto di Ricerca a Carettere Clinico Scientifico Arcispedale Santa Maria Nuova, Reggio Emilia, Italy
| | - Sarah Keating
- Department of Laboratory Medicine and Pathology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Megan Thompson
- Department of Laboratory Medicine and Pathology, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Patrick Shannon
- Department of Laboratory Medicine and Pathology, Mount Sinai Hospital, Toronto, Ontario, Canada
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8
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Tonni G, Grisolia G. Ultrasound diagnosis of central nervous system anomalies (bifid choroid plexus, ventriculomegaly, Dandy-Walker malformation) associated with multicystic dysplastic kidney disease in a trisomy 9 fetus: case report with literature review. JOURNAL OF CLINICAL ULTRASOUND : JCU 2013; 41:441-447. [PMID: 23055272 DOI: 10.1002/jcu.21999] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Accepted: 09/07/2012] [Indexed: 06/01/2023]
Abstract
Trisomy 9 is a lethal chromosomal abnormality that rarely progresses beyond the second trimester of pregnancy. Multiple central nervous system anomalies, including bifid choroid plexus, ventriculomegaly, and Dandy-Walker malformation, associated with multicystic dysplastic kidney disease in a trisomy 9 fetus are reported. The prenatal ultrasound diagnosis has been aided by novel three-dimensional ultrasound software.
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Affiliation(s)
- Gabriele Tonni
- Prenatal Diagnostic Service, Guastalla Civil Hospital, Department of Obstetrics and Gynecology, Via Donatori Sangue, 2 Guastalla, Reggio Emilia, Italy
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Kowalczyk M, Tomaszewska A, Podbioł-Palenta A, Constantinou M, Wawrzkiewicz-Witkowska A, Kowalski J, Kałużewski B, Zajączek S, Srebniak MI. Another rare case of a child with de novo terminal 9p deletion and co-existing interstitial 9p duplication: clinical findings and molecular cytogenetic study by array-CGH. Cytogenet Genome Res 2012; 139:9-16. [PMID: 22965227 DOI: 10.1159/000342165] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2012] [Indexed: 11/19/2022] Open
Abstract
Trisomy 9p is the fourth most common chromosome abnormality found in liveborns. We report on a rare case of partial trisomy 9p complicated by partial monosomy 9p. Clinical manifestation included craniofacial abnormalities typical for trisomy 9p syndrome, developmental delay, mental retardation and brain anomaly in the form of Dandy-Walker malformation. The cytogenetic abnormality was investigated with FISH and array-CGH to characterize the breakpoints of the complex rearrangement. The patient's karyotype was 46,XX,der(9)del(9)(p24)dup(9)(p21p24)dn.arr 9p24.3p24.2 (1-2,414,485)×1,9p24.2p21.3(2,414,485-24,101,280)×3. The cytogenetic rearrangement led to a 2.4-Mb deletion of 9p24.2pter and a 21.6-Mb duplication of 9p24.2p21.3. The clinical and cytogenetic findings in our and other similar patients are compared.
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Affiliation(s)
- M Kowalczyk
- Department of Medical Genetics, Medical University of Silesia, Sosnowiec, Poland.
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Vanlandingham M, Nguyen TV, Abdul-Rahman OA, Parent A, Zhang J. Phenotypical manifestations of partial trisomy 9 and monosomy 4 in two siblings. Neurol Sci 2008; 29:467-70. [PMID: 19039519 DOI: 10.1007/s10072-008-1016-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2008] [Accepted: 08/28/2008] [Indexed: 11/24/2022]
Abstract
In this case report, we describe two siblings with a previously unreported partial monosomy 4q and partial trisomy 9q. The sibling karyotypes were determined to be 46,XX,der(4)t(4;9)(q33;q33)pat and 46,XY,der(4)t(4;9)-(q33;q33)pat. The siblings share several common pathological features, including VSD, PDA, low-set ears and digit anomalies as well as features consistent with Pierre-Robin syndrome and hydrocephalus. We review previously reported phenotypes associated with monosomy 4q and partial trisomy 9q and discuss potential mechanisms for these morphological insults with particular emphasis on neuropathology.
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Affiliation(s)
- Matthew Vanlandingham
- Department of Neurosurgery, University of Mississippi Medical Center, 2500 N. State Street, Jackson, MS, 39216-4505, USA
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Abstract
Dandy-Walker syndrome (DWS) is a brain malformation of unknown etiology, but several reports have been published indicating that there is a causal relationship to various types of chromosomal abnormalities and malformation syndromes. In the present article, we present a bibliographical survey of several previously issued reports on chromosomal abnormalities associated with DWS, including our case of DWS found in trisomy 18. There are various types of chromosomal abnormalities associated with DWS; most of them are reported in chromosome 3, 9, 13 and 18. We also summarize some other chromosomal abnormalities and various congenital malformation syndromes.
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Affiliation(s)
- George Imataka
- Department of Pediatrics, Dokkyo University School of Medicine, Tochigi, Japan.
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12
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Forzano F, Mansour S, Ierullo A, Homfray T, Thilaganathan B. Posterior fossa malformation in fetuses: a report of 56 further cases and a review of the literature. Prenat Diagn 2007; 27:495-501. [PMID: 17367101 DOI: 10.1002/pd.1722] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE The purposes of this study were to determine the outcome of fetuses diagnosed as having a posterior fossa abnormality (PFA) and to find out if there are associated features helpful in determining the prognosis. METHODS This is a retrospective study of all posterior fossa abnormalities detected prenatally in our Units within the last 10 years. Fifty six patients were selected. Outcome data was collected from the Clinical Genetics Department records and the attending obstetrician or pediatrician. RESULTS An enlarged cisterna magna (ECM, diameter greater than 10 mm at 18-23 gw) was detected in 22 fetuses, which was isolated in 14 cases. All the patients followed-up (n = 11) with isolated ECM were normal at birth (100%). Non-isolated ECM was present in 8 cases. Further information was available in 7, 5 (71%) of whom had a poor outcome. A Dandy Walker complex abnormality (DWC) was detected in 34 patients. The majority of them had a poor prognosis, 54% if isolated and 84% if non-isolated. CONCLUSIONS Isolated ECM detected on prenatal scans has a favourable outcome, while DWC is associated with a very high chance of a poor prognosis.
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Affiliation(s)
- F Forzano
- Clinical Genetics Unit, South West Thames Regional Genetic Service, St George's, University of London, London, UK.
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Chen CP, Chen CP, Shih JC. Association of partial trisomy 9p and the Dandy-Walker malformation. Am J Med Genet A 2005; 132A:111-2. [PMID: 15523627 DOI: 10.1002/ajmg.a.30383] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Metzke-Heidemann S, Kuhling-von Kaisenberg H, Caliebe A, Janssen D, Jonat W, Grote W, von Kaisenberg CS. Phenotypical variation in cousins with the identical partial trisomy 9 (pter-q22.2) and 7 (q35-qter) at 16 and 23 weeks gestation. Am J Med Genet A 2004; 126A:197-203. [PMID: 15057986 DOI: 10.1002/ajmg.a.20563] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
From the study of numerical and structural chromosomal abnormalities, there is convincing evidence and accumulating information of a direct karyotype to phenotype correlation. Knowledge of phenotypic consequences of a specific chromosomal imbalance is important for genetic counseling and prenatal diagnosis. However, for unbalanced non-Robertsonian translocations a precise karyotype to phenotype correlation is difficult to predict for several reasons: (I) unbalanced non-Robertsonian translocations are rare, (II) the published case reports are often not age-matched, (III) varying breakpoints result in different lengths of the monosomic and trisomic segments and therefore the phenotype will depend on additional genes present or the loss of coding regions, and (IV) the combination of the same trisomy with different monosomies, or vice versa, can result in diverging phenotypes. Therefore, the study of the karyotype to phenotype correlation in affected relatives of the same age and the identical unbalanced translocation provides a good model to investigate phenotypic consequences of a specific genetic imbalance. We report of two second trimester fetuses with the identical major partial trisomy 9 (9pter-9q22.2) and minor partial trisomy 7 (q35-qter) resulting from a familial translocation (7;9)(q35;q22.2)mat. One fetus presented with a Dandy-Walker malformation, polymicrogyria, and mild dysmorphic features, whereas the other fetus showed unilateral cleft lip and palate without cerebral anomalies. Potential mechanisms for this different phenotypic expression of the same unbalanced translocation resulting in partial trisomy 9 and 7 in the two cousins and possible consequences for genetic counseling and prenatal diagnosis are discussed.
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Affiliation(s)
- S Metzke-Heidemann
- Department of Human Genetics, The University of Schleswig-Holstein, Campus Kiel, Schwanenweg 24, Kiel, Germany
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Deurloo KL, Cobben JM, Heins YM, de Ru M, Wijnaendts LCD, van Vugt JMG. Prenatal diagnosis of tetrasomy 9p in a 19-week-old fetus with Dandy-Walker malformation: a case report. Prenat Diagn 2004; 24:796-8. [PMID: 15503289 DOI: 10.1002/pd.850] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVE The presentation of sonographic and perinatal findings of tetrasomy 9p. METHODS AND RESULTS Chorionic villus sampling and amniocentesis were performed at 19 weeks of gestation because of the sonographic findings of Dandy-Walker malformation with bilateral ventriculomegaly. Cytogenetic analysis showed 47,XX,+i psu dic(9)(pter->q12::q12>-pter). The pregnancy was terminated at 20 weeks of gestation at the request of the parents. At post-mortem examination, the presumed hypoplasia of the vermis could not be confirmed for technical reasons. No other pathological findings were seen. CONCLUSION From our experience and from the literature, we conclude that Dandy-Walker malformation is an important finding in tetrasomy 9p. Chromosomal studies should be carried out in fetuses with sonographically detected Dandy-Walker malformation, even in the absence of other abnormalities.
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Affiliation(s)
- K L Deurloo
- Department of Obstetrics and Gynecology, VU University Medical Center, Amsterdam, The Netherlands
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Chen CP, Hsu CH, Lin SP, Ho CS, Lee CC, Wang W. Association of partial trisomy 9 (9pter-->q22.3) with corpus callosum dysgenesis, bilateral subependymal cysts, and ventriculomegaly. Prenat Diagn 2003; 23:519-20. [PMID: 12813773 DOI: 10.1002/pd.622] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Chen CP, Chang TY, Shih JC, Lin SP, Lin CJ, Wang W, Lee CC, Town DD, Pan CW, Tzen CY. Prenatal diagnosis of the Dandy-Walker malformation and ventriculomegaly associated with partial trisomy 9p and distal 12p deletion. Prenat Diagn 2002; 22:1063-6. [PMID: 12454959 DOI: 10.1002/pd.459] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
OBJECTIVES To present the prenatal diagnosis and perinatal findings of partial trisomy 9p and distal 12p deletion. METHODS AND RESULTS Amniocentesis was performed at 17 gestational weeks due to a balanced reciprocal translocation t(9;12)(p11.2;p13.3) in the mother. The father's karyotype was normal. The family had a 5-year-old daughter with a Dandy-Walker malformation and a trisomy 9p syndrome. Cytogenetic analysis of the cultured amniotic fluid cells revealed a 46,XY,der(12)t(9;12)(p11.2;p13.3)mat karyotype with partial monosomy 12p(12pter-->p13.3) and partial trisomy 9p(9pter-->p11.2). Sonographic examination of the fetal brain and skull showed bilateral ventriculomegaly, brachycephaly and a Dandy-Walker malformation with an enlarged cisterna magna and absence of the cerebellar vermis. The pregnancy was terminated subsequently. At autopsy, the proband manifested agenesis of the cerebellar vermis and a typical trisomy 9p phenotype. CONCLUSION Fetuses with partial trisomy 9p(9pter-->p11.2) may present a Dandy-Walker malformation and ventriculomegaly on prenatal ultrasound in the second trimester. A dosage effect of genes located on 9pter-->p11.2 may be associated with the abnormal development of the central nervous system in patients with partial or complete trisomy 9.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China.
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