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Chen CP, Wu FT, Pan YT, Wu PS, Yang CW, Chiu CL, Wang W. Low-level mosaic trisomy 7 at amniocentesis in a pregnancy associated with cytogenetic discrepancy between cultured amniocytes and uncultured amniocytes, perinatal progressive decrease of the trisomy 7 cell line and a favorable fetal outcome. Taiwan J Obstet Gynecol 2024; 63:549-551. [PMID: 39004485 DOI: 10.1016/j.tjog.2024.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2024] [Indexed: 07/16/2024] Open
Abstract
OBJECTIVE We present low-level mosaic trisomy at amniocentesis in a pregnancy associated with cytogenetic discrepancy between cultured amniocytes and uncultured amniocytes, perinatal progressive decrease of the trisomy 7 cell line and a favorable fetal outcome. CASE REPORT A 40-year-old, primigravid woman underwent amniocentesis at 16 weeks of gestation because of advanced maternal age. Amniocentesis revealed a karyotype of 46,XY in cultured amniocytes. Simultaneous array comparative genomic hybridization (aCGH) analysis on the DNA extracted from uncultured amniocytes revealed the result of arr (7) × 2-3, (X,Y) × 1, consistent with 24% mosaicism for trisomy 7. Polymorphic DNA marker analysis on the DNA extracted from the uncultured amniocytes and parental bloods excluded uniparental disomy (UPD) 7. Prenatal ultrasound findings were normal. She was referred for genetic counseling at 19 weeks of gestation. No repeat amniocentesis was suggested, and continuing the pregnancy was advised. At 22 weeks of gestation, the result of soluble fms-like tyrosine kinase-1 (sFlt-1)/placental growth factor (PlGF) = 6.1 (normal < 38). She did not have preeclampsia. At 39 weeks of gestation, a 3346-g male baby was delivered without any phenotypic abnormality. aCGH analysis on the DNA extracted from cord blood and placenta revealed the result of arr (1-22) × 2, (X,Y) × 1 with no genomic imbalance in all tissues. When follow-up at age three months, the baby was normal in development and phenotype. The peripheral blood had a karyotype of 46,XY, and interphase fluorescence in situ hybridization (FISH) analysis using the bacterial artificial chromosome (BAC) probes of chromosome 7 showed disomy 7 cells in all 102/102 cells. CONCLUSION Low-level mosaic trisomy 7 at amniocentesis can be associated with cytogenetic discrepancy between cultured amniocytes and uncultured amniocytes, perinatal progressive decrease of the trisomy 7 cell line and a favorable fetal outcome.
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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; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Institute of Clinical and Community Health Nursing, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Medical Laboratory Science and Biotechnology, College of Medical and Health Science, Asia University, Taichung, Taiwan.
| | - Fang-Tzu Wu
- Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan
| | - Yen-Ting Pan
- Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan
| | | | - Chien-Wen Yang
- Department of Obstetrics and Gynecology, MacKay Memorial Hospital, Taipei, Taiwan
| | - Chien-Ling Chiu
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
| | - Wayseen Wang
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
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Prenatal diagnosis of mosaicism for trisomy 7 in a single colony at amniocentesis in a pregnancy with a favorable outcome. Taiwan J Obstet Gynecol 2019; 58:852-854. [DOI: 10.1016/j.tjog.2019.09.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/06/2019] [Indexed: 11/24/2022] Open
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Wallerstein R, Misra S, Dugar RB, Alem M, Mazzoni R, Garabedian MJ. Current knowledge of prenatal diagnosis of mosaic autosomal trisomy in amniocytes: karyotype/phenotype correlations. Prenat Diagn 2015; 35:841-7. [DOI: 10.1002/pd.4620] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 05/01/2015] [Accepted: 05/07/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Robert Wallerstein
- Departments of Pediatrics; Santa Clara Valley Medical Center; San Jose CA USA
| | - Sonya Misra
- Departments of Pediatrics; Santa Clara Valley Medical Center; San Jose CA USA
| | - R. Bryce Dugar
- Departments of Pediatrics; Santa Clara Valley Medical Center; San Jose CA USA
| | - Monika Alem
- Obstetrics and Gynecology; Santa Clara Valley Medical Center; San Jose CA USA
| | - Ronit Mazzoni
- Obstetrics and Gynecology; Santa Clara Valley Medical Center; San Jose CA USA
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Abdelhedi F, El Khattabi L, Cuisset L, Tsatsaris V, Viot G, Druart L, Lebbar A, Dupont JM. Neonatal Silver-Russell syndrome with maternal uniparental heterodisomy, trisomy 7 mosaicism, and dysplasia of the cerebellum. Am J Clin Pathol 2014; 142:248-53. [PMID: 25015868 DOI: 10.1309/ajcpblmprxku1jue] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVES We report here the unusual association of Silver-Russell syndrome (SRS) and cerebellar dysplasia with trisomy 7 mosaicism and maternal uniparental disomy of chromosome 7 [UPD(7)m]. METHODS Low-level trisomy 7 mosaicism was diagnosed prenatally on amniocytes, and UPD(7)m was confirmed after birth. RESULTS Medical examination at birth showed dysmorphic facial features of SRS. Cytogenetic analysis on several tissues and cells confirmed mosaic trisomy 7. Unusual severe psychomotor retardation, hypotonia, and choreoathetoid movement were noted at 6 months. Brain magnetic resonance imaging showed both cerebellar hypoplasia and dysplasia. CONCLUSIONS This unusual association of SRS and dysplasia of the cerebellum might be related to the presence of the trisomy 7 mosaicism on the cerebellum. Our observation strengthens the hypothesis that the phenotype observed in patients with SRS with UPD(7)m might also result from an undetected low level of trisomy 7 mosaicism that could best be revealed by performing cytogenetic investigations.
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Affiliation(s)
- Fatma Abdelhedi
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France
| | | | - Laurence Cuisset
- Laboratory of Biochemistry and Molecular Genetics, APHP, Cochin Hospital, Paris, France
- Paris Descartes University, Faculty of Medicine, Paris, France
| | - Vassilis Tsatsaris
- Paris Descartes University, Faculty of Medicine, Paris, France
- Department of Gynecology-Obstetrics, APHP, Cochin Hospital, Paris, France
| | - Geraldine Viot
- Paris Descartes University, Faculty of Medicine, Paris, France
- Department of Gynecology-Obstetrics, APHP, Cochin Hospital, Paris, France
| | - Luc Druart
- Cytogenetics, Biomnis Laboratory, Paris, France
| | - Aziza Lebbar
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France
- Paris Descartes University, Faculty of Medicine, Paris, France
| | - Jean-Michel Dupont
- Cytogenetics Laboratory, APHP, Cochin Hospital, Paris, France
- Paris Descartes University, Faculty of Medicine, Paris, France
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Liehr T, Weise A, Hamid AB, Fan X, Klein E, Aust N, Othman MA, Mrasek K, Kosyakova N. Multicolor FISH methods in current clinical diagnostics. Expert Rev Mol Diagn 2013; 13:251-5. [PMID: 23570403 DOI: 10.1586/erm.12.146] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Multicolor FISH (mFISH) assays are currently indispensable for a precise description of derivative chromosomes. Routine application of such techniques on human chromosomes started in 1996 with the simultaneous use of all 24 human whole-chromosome painting probes in multiplex-FISH and spectral karyotyping. Since then, multiple approaches for chromosomal differentiation based on multicolor-FISH (MFISH) assays have been developed. Predominantly, they are applied to characterize marker or derivative chromosomes identified in conventional banding analysis. Since the introduction of array-based comparative genomic hybridization (aCGH), mFISH is also applied to verify and further delineate aCGH-detected aberrations. For the latter, it is important to consider the fact that aCGH cannot detect or characterize balanced rearrangements, which are important to be resolved in detail in infertility diagnostics. In addition, mFISH is necessary to distinguish different imbalanced situations detectable in aCGH; small supernumerary marker chromosomes have to be differentiated from insertions or unbalanced translocations. This review presents an overview on the available mFISH methods and their applications in pre- and post-natal clinical genetics.
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Affiliation(s)
- Thomas Liehr
- Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, Jena D-07743, Germany.
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Schmid M, Stary S, Springer S, Bettelheim D, Husslein P, Streubel B. Prenatal microarray analysis as second-tier diagnostic test: single-center prospective study. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2013; 41:267-273. [PMID: 23292918 DOI: 10.1002/uog.12389] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/06/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To evaluate the usefulness of chromosome microarrays as a second-tier test in prenatal genetic testing. METHODS We prospectively analyzed 75 high-risk pregnancies undergoing invasive prenatal genetic testing in which the karyotype either was normal or had findings other than a common non-mosaic autosomal aneuploidy. RESULTS Chromosomal microarray analysis (CMA) was performed successfully in all cases. Pathological copy-number variations (CNVs) explaining the phenotypes were found in 11 cases (14.7%). Four cases were detected with an unbalanced translocation. In three of these cases, subsequent genetic analysis demonstrated that a parent was an unknown carrier of a balanced translocation. Among the 67 cases with normal karyo-types, submicroscopic rearrangements with pathological significance were detected in five (7.5%) and CNVs of unclear significance were detected in one (1.5%). CMA was able to discriminate correctly between true mosaicism and confined or pseudomosaicism in all six mosaic cases. CONCLUSION CMA is a valuable second-tier test in high-risk pregnancies for which identification or further delineation of genetic aberrations is important. Its higher resolution results in a higher detection rate of aberrant cases, with a clear clinical benefit for estimation of risk of recurrence.
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Affiliation(s)
- M Schmid
- Department of Obstetrics and Gynecology, Medical University of Vienna, Vienna, Austria
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Lázár L, Nagy GR, Rigó J, Nagy B. [Cell-free nucleic acid-based non-invasive prenatal diagnosis of fetal aneuploidies]. Orv Hetil 2012; 153:1687-91. [PMID: 23089167 DOI: 10.1556/oh.2012.29474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Prenatal detection of fetal aneuploidies is one of the main goals of the prenatal diagnostic approach. As a benefit of the development of advanced ultrasound equipment and advances in molecular biology in the last decade, there is a significant progress in screening methods for fetal aneuploidies, although invasive methods remain the gold standard for aneuploidy detection. Non-invasive prenatal diagnosis has substantial medical impact as it targets the development of safer and more effective methods to avoid the risk of fetal loss associated with currently used invasive methods. Identification of fetal-specific messenger ribonucleic acids, digital polymerase chain reaction and next-generation sequencing give the real chance for non-invasive prenatal diagnosis of fetal aneuploidies. Although all these methods have both advantages and limitations, some of them are moving closer to clinical implementation. In this review the authors highlight the most recent advances in methods for non-invasive prenatal diagnosis of aneuploidies.
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Affiliation(s)
- Levente Lázár
- Semmelweis Egyetem, Általános Orvostudományi Kar I. Szülészeti és Nőgyógyászati Klinika, Budapest, Baross u. 27.
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Chen CP, Chang SD, Su YN, Chen M, Chern SR, Su JW, Chen YT, Chen WL, Pan CW, Lee MS, Wang W. Rapid positive confirmation of mosaicism for a small supernumerary marker chromosome as r(8) by interphase fluorescence in situ hybridization, quantitative fluorescent polymerase chain reaction, and array comparative genomic hybridization on uncultured amniocytes in a pregnancy with fetal pyelectasis. Taiwan J Obstet Gynecol 2012; 51:405-10. [PMID: 23040926 DOI: 10.1016/j.tjog.2012.07.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2012] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVE This study aimed at presenting prenatal diagnosis and molecular cytogenetic characterization of a small supernumerary marker chromosome (sSMC) derived from chromosome 8 by fluorescence in situ hybridization (FISH), quantitative fluorescent polymerase chain reaction (QF-PCR), and array comparative genomic hybridization (aCGH) on uncultured amniocytes. MATERIALS, METHODS, AND RESULTS A 32-year-old woman underwent amniocentesis at 19 weeks of gestation because of fetal pyelectasis. Amniocentesis revealed a de novo ring-shaped sSMC in two of 21 colonies of cultured amniocytes. Repeated amniocentesis at 22 weeks of gestation revealed a karyotype of 47,XY,+mar[8]/46,XY[32] in cultured amniocytes. Spectral karyotyping and FISH confirmed that the sSMC was derived from chromosome 8. She underwent a third amniocentesis at 26 weeks of gestation. Oligonucleotide-based aCGH analysis on uncultured amniocytes demonstrated a 43 Mb genomic gain in chromosome 8 encompassing 8p22→q12.1. Polymorphic DNA marker analysis of the uncultured amniocytes revealed a maternal origin of the sSMC and excluded uniparental disomy 8. Interphase FISH analysis showed three D8Z2 signals in 8/40 (20%) of uncultured amniocytes. The cultured amniocytes had a karyotype of 47,XY,+r(8)(p22q12.1)[3]/46,XY[37]. The pregnancy was carried to term, and an apparently normal baby, weighing 3300 g, was delivered with mild hydronephrosis but no other phenotypic abnormalities. The cord blood was found to have a karyotype of 47,XY,+r(8)(p22q12.1)[2]/46,XY[38]. CONCLUSION Prenatal diagnosis of fetal pyelectasis should alert obstetricians of chromosome aberration. Interphase FISH, QF-PCR, and aCGH analyses on uncultured amniocytes are helpful in rapid positive confirmation of an sSMC detected at amniocentesis.
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Affiliation(s)
- Chih-Ping Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.
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Chen CP, Su YN, Chen YY, Chern SR, Su JW, Chen YT, Town DD, Wang W. Usefulness of interphase FISH on uncultured amniocytes for rapid confirmation of low-level trisomy 7 mosaicism in a pregnancy with fetal intrauterine growth restriction and microcephaly. Taiwan J Obstet Gynecol 2012; 51:471-4. [PMID: 23040944 DOI: 10.1016/j.tjog.2012.07.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2012] [Indexed: 10/27/2022] Open
Affiliation(s)
- Chih-Ping Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.
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Chen CP, Chen M, Chern SR, Wu PS, Chang SP, Lee DJ, Chen YT, Chen LF, Su JW, Hwa-Ruey Hsieh A, Hwa-Jiun Hsieh A, Wang W. Prenatal diagnosis and molecular cytogenetic characterization of mosaicism for a small supernumerary marker chromosome derived from ring chromosome 2. Taiwan J Obstet Gynecol 2012; 51:411-7. [DOI: 10.1016/j.tjog.2012.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2012] [Indexed: 11/26/2022] Open
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