Alpha-fetoprotein and acetylcholinesterase in twins discordant for neural tube defect.

Abstract:

:Twins concordant for elevated alpha-fetoprotein (AFP) and acetylcholinesterase (AChE) and discordant for neural tube defect (NTD) and sex are reported. A literature review reveals instances of termination of twin pregnancies with one normal and one abnormal fetus, partly based on concordant high AFP and positive AChE (although discordant on ultrasound examination). The levels of AFP and AChE in twin pregnancies are probably a function of the number of layers of fetal membranes separating twin sacs; dichorionic, diamniotic membranes allow transfer of AFP; monochorionic, diamniotic membranes allow transfer of both AFP and AChE. Cautious interpretation of biochemical findings and reliance on high resolution ultrasonography are suggested.

journal_name

Prenat Diagn

journal_title

Prenatal diagnosis

authors

Johnson VP,Vidgoff J,Wilson N,Madison D

doi

10.1002/pd.1970091203

subject

Has Abstract

pub_date

1989-12-01 00:00:00

pages

831-7

issue

12

eissn

0197-3851

issn

1097-0223

journal_volume

9

pub_type

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  • The utility of detailed first trimester ultrasound examination in abnormal fetal nuchal translucency.

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    authors: Bronshtein M,Zimmer EZ,Blazer S

    更新日期:2008-11-01 00:00:00

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    更新日期:2008-10-01 00:00:00

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    更新日期:2016-02-01 00:00:00

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    更新日期:2014-05-01 00:00:00

  • First trimester intact hCG as an early marker of trisomy 21: a promise unrecognised?

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    authors: Spencer K,Cowans NJ,Uldbjerg N,Vereecken A,Tørring N

    更新日期:2008-12-01 00:00:00

  • The effect of image size on nuchal translucency measurement.

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    authors: Edwards A,Mulvey S,Wallace EM

    更新日期:2003-04-01 00:00:00

  • Fetal choroid plexus cysts--is a genetic evaluation indicated?

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    pub_type: 杂志文章,评审

    doi:

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    更新日期:1997-06-01 00:00:00

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    更新日期:2005-01-01 00:00:00

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    doi:10.1002/(SICI)1097-0223(199606)16:6<564::AID-PD903

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