1
|
Hartwig TS, Ambye L, Sørensen S, Jørgensen FS. Discordant non-invasive prenatal testing (NIPT) - a systematic review. Prenat Diagn 2017; 37:527-539. [DOI: 10.1002/pd.5049] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 03/28/2017] [Accepted: 03/31/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Tanja Schlaikjaer Hartwig
- Fetal Medicine Unit, Department of Obstetrics and Gynecology; Copenhagen University Hospital; Hvidovre Denmark
| | - Louise Ambye
- Department of Clinical Biochemistry; Copenhagen University Hospital; Hvidovre Denmark
| | - Steen Sørensen
- Department of Clinical Biochemistry; Copenhagen University Hospital; Hvidovre Denmark
| | - Finn Stener Jørgensen
- Fetal Medicine Unit, Department of Obstetrics and Gynecology; Copenhagen University Hospital; Hvidovre Denmark
| |
Collapse
|
2
|
Srebniak MI, de Wit MC, Diderich KEM, Govaerts LCP, Joosten M, Knapen MFCM, Bos MJ, Looye-Bruinsma GAG, Koningen M, Go ATJI, Galjaard RJH, Van Opstal D. Enlarged NT (≥3.5 mm) in the first trimester - not all chromosome aberrations can be detected by NIPT. Mol Cytogenet 2016; 9:69. [PMID: 27610202 PMCID: PMC5015200 DOI: 10.1186/s13039-016-0279-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 08/26/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Since non-invasive prenatal testing (NIPT) in maternal blood became available, we evaluated which chromosome aberrations found in our cohort of fetuses with an enlarged NT in the first trimester of pregnancy (tested with SNP microarray) could be detected by NIPT as well. METHOD 362 fetuses were referred for cytogenetic testing due to an enlarged NT (≥3.5 mm). Chromosome aberrations were investigated using QF-PCR, karyotyping and whole genome SNP array. RESULTS After invasive testing a chromosomal abnormality was detected in 137/362 (38 %) fetuses. 100/362 (28 %) cases concerned trisomy 21, 18 or 13, 25/362 (7 %) an aneuploidy of sex chromosomes and 3/362 (0.8 %) triploidy. In 6/362 (1.6 %) a pathogenic structural unbalanced chromosome aberration was seen and in 3/362 (0.8 %) a susceptibility locus for neurodevelopmental disorders was found. We estimated that in 2-10 % of fetuses with enlarged NT a chromosome aberration would be missed by current NIPT approaches. CONCLUSION Based on our cohort of fetuses with enlarged NT we may conclude that NIPT, depending on the approach, will miss chromosome aberrations in a significant percentage of pregnancies. Moreover all abnormal NIPT results require confirmatory studies with invasive testing, which will delay definitive diagnosis in ca. 30 % of patients. These figures are important for pretest counseling enabling pregnant women to make informed choices on the prenatal test. Larger cohorts of fetuses with an enlarged NT should be investigated to assess the additional diagnostic value of high resolution array testing for this indication.
Collapse
Affiliation(s)
- Malgorzata I Srebniak
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Merel C de Wit
- Department of Obstetrics and Gynecology, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Karin E M Diderich
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Lutgarde C P Govaerts
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Marieke Joosten
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Maarten F C M Knapen
- Department of Obstetrics and Gynecology, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands ; Foundation Prenatal Screening Southwest region of The Netherlands, Wytemaweg 80, Na-1509, 3015 CN Rotterdam, The Netherlands
| | - Marnix J Bos
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Gerda A G Looye-Bruinsma
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Mieke Koningen
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Attie T J I Go
- Department of Obstetrics and Gynecology, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Robert Jan H Galjaard
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Diane Van Opstal
- Department of Clinical Genetics, Erasmus Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| |
Collapse
|