Analysis of increased nuchal translucency: Chorionic villi sampling and second-trimester level II sonography
Journal of Genetic Medicine
; : 56-62, 2014.
Article
em En
| WPRIM
| ID: wpr-83558
Biblioteca responsável:
WPRO
ABSTRACT
PURPOSE:
To assess the outcomes of increased fetal nuchal translucency (NT), to aid in prenatal counseling and management in our practice. MATERIALS ANDMETHODS:
We retrospectively reviewed the medical records of patients who underwent first trimester fetal karyotyping using chorionic villi sampling (CVS) and second trimester level II sonography for a fetal NT thickness > or =3.0 mm between 11 weeks and 13 weeks 6 days' gestation, at Gyeongsang National University Hospital. Pediatric medical records and a telephone interview were used to follow-up live-born children. Exclusion criteria included incomplete data and CVS for other indications.RESULTS:
Seventy cases met the inclusion criteria (median NT thickness, 4.7 mm; range, 3.0-16.1 mm). Twenty-nine cases (41.4%) were aneuploid. The prevalence of chromosomal defects increased with NT thickness NT 3.0-3.4 mm, 16.7%; NT 3.5-4.4 mm, 27.3%; NT 4.5-5.4 mm, 66.7%; NT 5.5-6.4 mm, 37.5%; NT > or =6.5 mm, 62.5%. The most common karyotype abnormality was trisomy 18 (n=12), followed by trisomy 21 (n=9). In chromosomally normal fetuses (n=41), fetal death occurred in 2 cases (4.9%), and structural malformations were found in 11 cases (26.8%). In chromosomally and anatomically normal fetuses (n=28), one child had neurodevelopmental delay (3.6%). Twenty-eight infants who had a prenatal increased NT were alive and well at follow-up (40%).CONCLUSION:
Outcomes of increased fetal NT might help inform prenatal counseling and management. The high prevalence of chromosomal defects associated with increased fetal NT implies that CVS should be performed in the first trimester, particularly considering the stress associated with an uncertain diagnosis.Palavras-chave
Texto completo:
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Base de dados:
WPRIM
Assunto principal:
Segundo Trimestre da Gravidez
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Primeiro Trimestre da Gravidez
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Trissomia
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Amostra da Vilosidade Coriônica
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Prontuários Médicos
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Prevalência
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Entrevistas como Assunto
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Estudos Retrospectivos
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Seguimentos
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Síndrome de Down
Tipo de estudo:
Diagnostic_studies
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Observational_studies
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Prevalence_studies
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Prognostic_studies
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Qualitative_research
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Risk_factors_studies
Limite:
Child
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Female
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Humans
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Infant
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Pregnancy
Idioma:
En
Revista:
Journal of Genetic Medicine
Ano de publicação:
2014
Tipo de documento:
Article