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https://www.readbyqxmd.com/read/28423190/the-clinical-utility-of-genome-wide-non-invasive-prenatal-screening
#1
Francesco Fiorentino, Sara Bono, Francesca Pizzuti, Sara Duca, Arianna Polverari, Monica Faieta, Marina Baldi, Laura Diano, Francesca Spinella
OBJECTIVE: In this study, we expanded conventional cell-free fetal DNA(cfDNA)-based non-invasive prenatal testing(NIPT) to cover the entire genome. We aimed to compare the performance of the two test in a large general population of pregnant women, in order to assess the clinical utility of the genome-wide screening. METHOD: Genome-wide cfDNA analysis was offered to 12.114 pregnant women undergoing NIPT for common fetal aneuploidy. Sequencing data were analyzed using an algorithm optimized to identify aneuploidies and subchromosomal aberrations...
April 17, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28420901/discrepancy-between-non-invasive-prenatal-genetic-testing-nipt-and-amniotic-chromosomal-test-due-to-placental-mosaicism-a-case-report-and-literature-review
#2
Kei Hayata, Yuji Hiramatsu, Hisashi Masuyama, Eriko Eto, Takashi Mitsui, Shoko Tamada
We experienced a case of advanced maternal age in which a fetus was found to be positive for trisomy 18 at re-examination following indeterminate non-invasive prenatal genetic testing (NIPT), the amniotic fluid chromosomal test revealed a normal karyotype, and confined placental mosaicism (CPM) was observed in an SNP microarray analysis of the placenta. The child was born with no defects or complications. In the present case, the result of the original NIPT at week 15 of pregnancy was indeterminate and the subsequent re-examination result was positive; since the definitive normal diagnosis was not reported until the latter half of week 21, the pregnant patient was subjected to psychological stress for a long period of time...
April 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28409863/the-influence-of-snp-based-chromosomal-microarray-and-nipt-on-the-diagnostic-yield-in-10-000-fetuses-with-and-without-fetal-ultrasound-anomalies
#3
Malgorzata I Srebniak, Maarten F C M Knapen, Marike Polak, Marieke Joosten, Karin E M Diderich, Lutgarde C P Govaerts, Marjan Boter, Joan N R Kromosoeto, Daniella Aloysia C M van Hassel, Gido Huijbregts, Wilfred F J van Ijcken, Roger Heydanus, Anneke Dijkman, Toon Toolenaar, Femke A T de Vries, Jeroen Knijnenburg, Attie T J I Go, Robert-Jan H Galjaard, Diane Van Opstal
Prenatal diagnostics has been impacted by technological changes in the past decade, which have affected the diagnostic yield. The aim of this study was to evaluate the impact of SNP array and non-invasive prenatal testing (NIPT) on the diagnostic yield and the number of invasive tests in our center. The frequency of pathogenic fetal unbalanced chromosome aberrations was studied in 10,005 cases referred for prenatal testing in 2009-2015. Chromosomal SNP microarray analysis replaced karyotyping in all invasively tested pregnancies and since 2014 a choice between NIPT and diagnostic testing with microarray was offered to women with an increased risk for common aneuploidy...
April 14, 2017: Human Mutation
https://www.readbyqxmd.com/read/28385172/the-rate-of-invasive-testing-for-trisomy-21-is-reduced-after-implementation-of-nipt
#4
Louise Bjerregaard, Anne Betsagoo Stenbakken, Camilla Skov Andersen, Line Kristensen, Cecilie Vibeke Jensen, Peter Skovbo, Anne Nødgaard Sørensen
INTRODUCTION: The non-invasive prenatal test (NIPT) was introduced in the North Denmark Region in March 2013. NIPT is offered as an alternative to invasive tests if the combined first trimester risk of trisomy 21 (T21) is ≥ 1:300. The purpose of this study was to investigate the effect of NIPT implementation among high-risk pregnancies in a region with existing first-trimester combined screening for T21. The primary objective was to examine the effect on the invasive testing rate. METHODS: This was a retrospective observational study including high-risk singleton pregnancies in the North Denmark Region...
April 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28382695/discordant-non-invasive-prenatal-testing-nipt-a-systematic-review
#5
REVIEW
Tanja Schlaikjaer Hartwig, Louise Ambye, Steen Sørensen, Finn Stener Jørgensen
With a high sensitivity and specificity, NIPT is an incomparable screening test for fetal aneuploidy. However, the method is rather newly introduced and experiences with discordant results are few. We did a systematic review of literature reporting details of false positive and false negative NIPT results. Discordant sex chromosome results were not included. We identified 22 studies reporting case details. In total 206 discordant cases were included, of which 88% were false positive and 12% false negative. Details on maternal age, gestational age, platform/company, Z-score, fetal fraction, results and explanation were specified...
April 5, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28355226/considering-medical-risk-information-and-communicating-values-a-mixed-method-study-of-women-s-choice-in-prenatal-testing
#6
An Chen, Henni Tenhunen, Paulus Torkki, Seppo Heinonen, Paul Lillrank, Vedran Stefanovic
INTRODUCTION: Nowadays, an important decision for pregnant women is whether to undergo prenatal testing for aneuploidies and which tests to uptake. We investigate the factors influencing women's choices between non-invasive prenatal testing (NIPT) and invasive prenatal tests in pregnancies with elevated a priori risk of fetal aneuploidies. METHODOLOGY: This is a mixed-method study. We used medical data (1st Jan 2015-31st Dec 2015) about women participating in further testing at Fetomaternal Medical Center at Helsinki University Hospital and employed Chi-square tests and ANOVA to compare the groups of women choosing different methods...
2017: PloS One
https://www.readbyqxmd.com/read/28326560/sex-chromosome-aneuploidy-detection-by-non-invasive-prenatal-testing-helpful-or-hazardous
#7
Rosemary E Reiss, Marie Discenza, Judith Foster, Lori Dobson, Louise Wilkins-Haug
OBJECTIVES: To assess the incidence of sex chromosome aneuploidy (SCA) predicted by non-invasive prenatal testing (NIPT), assess test performance, and compare it with nuchal translucency (NT) screening among patients seen in our prenatal diagnosis center. METHODS: We identified suspected cases of SCA by reviewing results from all NIPT samples sent from our center to commercial laboratories offering analysis by cell-free DNA between December 1, 2012 to July 31, 2015...
March 21, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28295291/study-of-the-extent-of-information-desired-by-women-undergoing-non-invasive-prenatal-testing-following-positive-prenatal-down-syndrome-screening-test-results
#8
Tsz-Kin Lo, Kelvin Yuen-Kwong Chan, Anita Sik-Yau Kan, Po-Lam So, Choi-Wah Kong, Shui-Lam Mak, Chung-Nin Lee
No abstract text is available yet for this article.
March 12, 2017: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28198030/confined-placental-mosaicism-for-22q11-2-deletion-as-the-etiology-for-discordant-positive-nipt-results
#9
M Bunnell, C Zhang, C Lee, D W Bianchi, L Wilkins-Haug
22q11.2 deletion, the most common microdeletion syndrome within the general population, is estimated to have a prevalence of 1 in 3000 to 6000. Non-invasive prenatal testing has recently expanded to include screening for several microdeletions including 22q11.2. Given the expansion of prenatal screening options to include microdeletions, it is important to understand the limits of this technology and the variety of reasons that a discordant positive result can occur. Here, we describe a case of a pregnant woman who received a positive non-invasive prenatal maternal plasma screen for 22q11...
February 14, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28158220/targeted-capture-enrichment-assay-for-non-invasive-prenatal-testing-of-large-and-small-size-sub-chromosomal-deletions-and-duplications
#10
Maria C Neofytou, Kyriakos Tsangaras, Elena Kypri, Charalambos Loizides, Marios Ioannides, Achilleas Achilleos, Petros Mina, Anna Keravnou, Carolina Sismani, George Koumbaris, Philippos C Patsalis
Noninvasive prenatal testing (NIPT) using whole genome and targeted sequencing has become increasingly accepted for clinical detection of Trisomy 21 and sex chromosome aneuploidies. Few studies have shown that sub-chromosomal deletions or duplications associated with genetic syndromes can also be detected in the fetus noninvasively. There are still limitations on these methodologies such as the detection of variants of unknown clinical significance, high number of false positives, and difficulties to detect small aberrations...
2017: PloS One
https://www.readbyqxmd.com/read/28152582/contribution-of-maternal-copy-number-variations-to-false-positive-fetal-trisomies-detected-by-noninvasive-prenatal-testing
#11
Xiya Zhou, Lili Sui, Yalan Xu, Yijun Song, Qingwei Qi, Jianguang Zhang, Hongmin Zhu, Huaiyu Sun, Feng Tian, Mengnan Xu, David S Cram, Juntao Liu
OBJECTIVE: The aim of the study was to determine the contribution and significance of maternal copy number variations (CNVs) to false-positive noninvasive prenatal testing (NIPT) trisomy results. METHODS: A total of 112 021 patients were referred for NIPT. Fetal aneuploidy testing was performed using low coverage massively parallel sequencing, and results reported as chromosome Z-scores. Copy number variation sequencing (CNV-Seq) was used to detect maternal DNA CNVs...
February 2, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28109006/attitudes-towards-non-invasive-prenatal-diagnosis-among-obstetricians-in-pakistan-a-developing-islamic-country
#12
Shenaz Ahmed, Hussain Jafri, Yasmin Rashid, Gerald Mason, Yasmin Ehsan, Mushtaq Ahmed
OBJECTIVES: Stakeholders' views are essential for informing implementation strategies for non-invasive prenatal testing (NIPT). Little is known about such views in developing countries. We explored attitudes towards NIPT among obstetricians in Pakistan, a developing, Islamic country. METHODS: A 35-item questionnaire was distributed and collected at eight events (a national conference and seven workshops in five cities) for obstetric professionals on advances in fetal medicine...
January 20, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28098911/diagnosis-for-choroideremia-in-a-large-chinese-pedigree-by-next%C3%A2-generation-sequencing-ngs-and-non%C3%A2-invasive-prenatal-testing-nipt
#13
Li Zhu, Jingliang Cheng, Boxu Zhou, Chunli Wei, Weichan Yang, Dong Jiang, Iqra Ijaz, Xiaojun Tan, Rui Chen, Junjiang Fu
To develop an effective strategy to isolate and use cell‑free fetal DNA (cffDNA) for the combined use of next‑generation sequencing (NGS) for diagnosing choroideremia and non‑invasive prenatal testing (NIPT) for Y chromosome determination, a large Chinese family with an X‑linked recessive disease, choroideremia, was recruited. Cell‑free DNA was extracted from maternal plasma, and SRY polymerase chain reaction amplification was performed using NIPT. Sanger sequencing was subsequently used for fetal amniotic fluid DNA verification...
March 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28062017/non-invasive-prenatal-testing-and-the-unveiling-of-an-impaired-translation-process
#14
Blake Murdoch, Vardit Ravitsky, Ubaka Ogbogu, Sarah Ali-Khan, Gabrielle Bertier, Stanislav Birko, Tania Bubela, Jeremy De Beer, Charles Dupras, Meika Ellis, Palmira Granados Moreno, Yann Joly, Kalina Kamenova, Zubin Master, Alessandro Marcon, Mike Paulden, François Rousseau, Timothy Caulfield
Non-invasive prenatal testing (NIPT) is an exciting technology with the potential to provide a variety of clinical benefits, including a reduction in miscarriages, via a decline in invasive testing. However, there is also concern that the economic and near-future clinical benefits of NIPT have been overstated and the potential limitations and harms underplayed. NIPT, therefore, presents an opportunity to explore the ways in which a range of social pressures and policies can influence the translation, implementation, and use of a health care innovation...
January 2017: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/27972316/systematic-review-of-cost-effectiveness-analysis-cea-of-the-cell-free-dna-cfdna-non-invasive-prenatal-test-nipt-for-trisomy-21-t21-screening
#15
M Bourdoncle, J Li, A Berthelot, M Cognet, C Sambuc, O Scemama, C Rumeau-Pichon
No abstract text is available yet for this article.
November 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/27917919/niptric-an-online-tool-for-clinical-interpretation-of-non-invasive-prenatal-testing-nipt-results
#16
Birgit Sikkema-Raddatz, Lennart F Johansson, Eddy N de Boer, Elles M J Boon, Ron F Suijkerbuijk, Katelijne Bouman, Catia M Bilardo, Morris A Swertz, Martijn Dijkstra, Irene M van Langen, Richard J Sinke, Gerard J Te Meerman
To properly interpret the result of a pregnant woman's non-invasive prenatal test (NIPT), her a priori risk must be taken into account in order to obtain her personalised a posteriori risk (PPR), which more accurately expresses her true likelihood of carrying a foetus with trisomy. Our aim was to develop a tool for laboratories and clinicians to calculate easily the PPR for genome-wide NIPT results, using diploid samples as a control group. The tool takes the a priori risk and Z-score into account. Foetal DNA percentage and coefficient of variation can be given default settings, but actual values should be used if known...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900229/patient-perception-of-negative-noninvasive-prenatal-testing-results
#17
A Theresa Wittman, S Shahrukh Hashmi, Hector Mendez-Figueroa, Salma Nassef, Blair Stevens, Claire N Singletary
Objective To determine patient perception of residual risk after receiving a negative non-invasive prenatal testing result. Introduction Recent technological advances have yielded a new method of prenatal screening, non-invasive prenatal testing (NIPT), which uses cell-free fetal DNA from the mother's blood to assess for aneuploidy. NIPT has much higher detection rates and positive predictive values than previous methods however, NIPT is not diagnostic. Past studies have demonstrated that patients may underestimate the limitations of prenatal screening; however, patient perception of NIPT has not yet been assessed...
October 2016: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/27887921/non-invasive-prenatal-diagnosis-of-thalassemias-using-maternal-plasma-cell-free-dna
#18
REVIEW
Irena Hudecova, Rossa W K Chiu
Non-invasive prenatal testing (NIPT) using maternal plasma cell free DNA has already reshaped the existing prenatal care system for pregnancies screened for common chromosomal aneuploidies. On the other hand, much progress has been made in developing NIPT for monogenic diseases. Thalassemia served as a disease model to develop strategies for NIPT of monogenic traits. One approach focuses on the detection or exclusion of paternally inherited fetal mutations that are absent from the mother's genome. The assessment of maternally inherited mutations in maternal plasma requires the use of highly sensitive DNA quantification techniques...
February 2017: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27862068/development-and-validation-of-a-fetal-genotyping-assay-with-potential-for-noninvasive-prenatal-diagnosis-of-hereditary-hearing-loss
#19
Ying Chen, Yiqian Liu, Benjing Wang, Jun Mao, Ting Wang, Kan Ye, Yanlin Ye, David S Cram, Hong Li
OBJECTIVE: Inherited non-syndromic hearing loss (NSHL) is a common sensory disorder that afflicts otherwise healthy individuals. The aim of the study was to evaluate the performance of circulating single molecule amplification and re-sequencing technology (cSMART) for non-invasive prenatal testing (NIPT) of NSHL. METHOD: Neonatal inheritance of NSHL mutations was determined from bloodspots using SNaPshot genotyping. NIPT of cell-free DNA for fetal NSHL mutations in the GJB2, GJB3 and SLC26A4 genes was performed by a multiplex cSMART assay...
December 2016: Prenatal Diagnosis
https://www.readbyqxmd.com/read/27859455/women-s-choices-for-invasive-or-non-invasive-testing-influence-of-gestational-age-and-service-delivery
#20
An Chen, Henni Tenhunen, Paulus Torkki, Seppo Heinonen, Paul Lillrank, Vedran Stefanovic
OBJECTIVE: To investigate the factors influencing women's post-counseling choices between non-invasive prenatal testing (NIPT) and invasive prenatal diagnosis in pregnancies with elevated a priori risk of fetal chromosomal abnormalities or after the initial screening. METHODS: Data were collected from test choice database at Fetomaternal Medical Center (FMC) at Helsinki University Hospital, Finland. We focused on the women with gestational age less than 15 weeks and who were offered NIPT or invasive procedure (CVS or amniocentesis) after pre-test counseling...
December 2016: Prenatal Diagnosis
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