scholarly journals Estimating an individual's risk of having a fetus with open spina bifida and the value of repeat alpha-fetoprotein testing: FOURTH REPORT OF THE UK COLLABORATIVE STUDY ON ALPHA-FETOPROTEIN IN RELATION TO NEURAL TUBE DEFECTS

1982 ◽  
Vol 36 (2) ◽  
pp. 87-95 ◽  
Keyword(s):  
Spina Bifida ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
Collaborative Study ◽  
Alpha Fetoprotein ◽  
Fourth Report ◽  
The Uk ◽  
Open Spina Bifida

Concanavalin A binding of alpha-fetoprotein in amniotic fluid as an aid in the diagnosis of neural tube defects.

1981 ◽  
Vol 27 (10) ◽  
pp. 1658-1660 ◽  
Author(s):  
P K Buamah ◽  
P Taylor ◽  
A M Ward
Keyword(s):  
Spina Bifida ◽  
Amniotic Fluid ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
Concanavalin A ◽  
Gestational Age ◽  
Alpha Fetoprotein ◽  
Normal Outcome ◽  
Fetal Malformations ◽  
Open Spina Bifida

Abstract Concanavalin A nonreactive alpha-fetoprotein was determined in samples of amniotic fluid from 16 abnormal pregnancies complicated by anencephaly (7), open spina bifida (6), intra-uterine death (1), anencephaly with exomphalos (1), or open spina bifida with exomphalos (1), and in amniotic fluid from 50 normal pregnancies with gestational age between 13 and 24 weeks. In all 16 cases with fetal malformations, the proportion of nonreactive alpha-fetoprotein was significantly decreased (median 5.3%) as compared with amniotic fluid from pregnancies with a normal outcome (median 39.7%). The results confirm that this measurement is useful in the diagnosis of neural tube defects, especially when the concentration of alpha-fetoprotein in amniotic fluid is normal or only slightly above normal and gestational age is uncertain.

Prenatal Diagnosis and Patient Preferences in Patients with Neural Tube Defects around the Advent of Fetal Surgery in Belgium and Holland

2014 ◽  
Vol 37 (3) ◽  
pp. 226-234 ◽  
Author(s):  
Céline Ovaere ◽  
Alex Eggink ◽  
Jute Richter ◽  
Titia E. Cohen-Overbeek ◽  
Frank Van Calenbergh ◽  
...  
Keyword(s):  
Prenatal Diagnosis ◽  
Spina Bifida ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
Fetal Surgery ◽  
Training Material ◽  
Spinal Lesions ◽  
Spina Bifida Aperta ◽  
Prenatal Management ◽  
Open Spina Bifida

Introduction: We review the characteristics and prenatal choices of patients recently evaluated for neural tube defects (NTD) at two tertiary units. The prenatal diagnosis of NTD allows parents to consider all prenatal options. In selected cases of spina bifida aperta this also includes fetal surgery, which we started offering after combined ‘in-house' and ‘exported' training. Material and Methods: This is a retrospective review of prospectively collected data on NTD diagnosed over the last 8 years and recent fetal surgery referrals. Results: A total of 167 patients were referred for assessment at a median of 19 weeks. Cranial lesions were diagnosed significantly earlier than spinal lesions. Of the open spinal lesions, 77% were isolated. Of these, 22% were managed expectantly and 1 (1%) had fetal surgery. There was no correlation between parental decisions on prenatal management with disease-specific severity markers. We had 14 fetal surgery referrals, all but 1 from beyond our typical referral area; 6 of the assessed patients were operated on, 4 were expectantly managed and 4 requested termination of pregnancy (TOP). These pregnancy outcomes were in the expected range. Discussion: Open spina bifida is mainly diagnosed in the second trimester and 76% of subjects request TOP, irrespective of the severity indicators. The number of local patients considering fetal surgery is low.

scholarly journals Neurone Specific Enolase in Amniotic Fluid: A Potential Marker of Anencephaly

1988 ◽  
Vol 25 (1) ◽  
pp. 85-88 ◽  
Author(s):  
K Spencer ◽  
P Carpenter
Keyword(s):  
Prenatal Diagnosis ◽  
Spina Bifida ◽  
Amniotic Fluid ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
Normal Values ◽  
Potential Marker ◽  
Neuronal Proteins ◽  
Non Gaussian ◽  
Open Spina Bifida

Normal values for neurone specific enolase in amniotic fluid have been found to follow a non gaussian distribution with a 1–99 centile range of 1·10–4·32 μg/L. Neurone specific enolase levels have been shown to be raised in the amniotic fluid of pregnancies complicated by anencephaly, although not those complicated by open spina bifida. Neurone specific enolase measured by radioimmunoassay is capable of totally discriminating between normal pregnancies and those complicated by anencephaly. The study demonstrates the possible value of investigating other neuronal proteins which may find value as adjuncts to amniotic fluid Alpha fetoprotein levels in the prenatal diagnosis of Neural Tube Defects.

scholarly journals Novel mouse model of encephalocele: post-neurulation origin and relationship to open neural tube defects

2019 ◽  
Author(s):  
Ana Rolo ◽  
Gabriel L. Galea ◽  
Dawn Savery ◽  
Nicholas D. E. Greene ◽  
Andrew J. Copp
Keyword(s):  
Spina Bifida ◽  
Mouse Model ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
Small Gtpase ◽  
Late Gestation ◽  
Neural Tube Closure ◽  
Surface Ectoderm ◽  
Open Spina Bifida ◽  
Tube Closure

ABSTRACTEncephalocele is a clinically important birth defect that can lead to severe disability in childhood and beyond. The embryonic pathogenesis of encephalocele is poorly understood and, while usually classified as a ‘neural tube defect’, there is conflicting evidence on whether encephalocele results from defective neural tube closure, or is a post-neurulation defect. It is also unclear whether encephalocele can result from the same causative factors as anencephaly and open spina bifida, or whether it is aetiologically distinct. This lack of information results largely from the scarce availability of animal models of encephalocele, particularly ones that resemble the commonest, non-syndromic human defects. Here we report a novel mouse model of occipito-parietal encephalocele, in which the small GTPase Rac1 is conditionally ablated in the (non-neural) surface ectoderm. Most mutant fetuses have open spina bifida, and some also exhibit exencephaly/anencephaly. However, a large proportion of mutant fetuses exhibit encephalocele affecting the occipito-parietal region. The encephalocele phenotype does not result from a defect in neural tube closure, but rather from a later disruption of the surface ectoderm covering the already closed neural tube, allowing the brain to herniate. The neuroepithelium itself shows no down-regulation of Rac1 and appears morphologically normal until late gestation. A large skull defect develops overlying the region of brain herniation. Our work provides a new genetic model of occipito-parietal encephalocele, particularly resembling non-syndromic human cases. While encephalocele has a different, later-arising pathogenesis than open neural tube defects, both can share the same genetic causation.SUMMARY STATEMENTEncephalocele - a severe brain defect - arises after neural tube closure, but can share a common genetic cause with anencephaly, a defect of neural tube closure.

Detection of spina bifida in the first trimester of gestation in association with triploidy

2017 ◽  
Author(s):  
K.K. Otaryan , C.G. Gagaev
Keyword(s):  
Spina Bifida ◽  
Early Detection ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
First Trimester ◽  
Termination Of Pregnancy ◽  
Diagnostic Tools ◽  
Prenatal Detection ◽  
Post Abortion

The case of prenatal detection of spina bifida at 12+3 weeks of gestation is described. Termination of pregnancy was performed at 13+3 weeks. Post-abortion karyotyping revealed triploidy (69XXX). Diagnostic tools for early detection of neural tube defects in the 1st trimester of gestation and subsequent appropriate management of pregnancy are discussed.

SCREENING FOR NEURAL-TUBE DEFECTS BY A HÆMAGGLUTINATION TEST FOR SERUM-ALPHA-FETOPROTEIN

The Lancet ◽  
1975 ◽  
Vol 306 (7940) ◽  
pp. 877-878 ◽  
Author(s):  
B Nørgaard-Pedersen
Keyword(s):  
Neural Tube ◽  
Neural Tube Defects ◽  
Alpha Fetoprotein ◽  
Haemagglutination Test ◽  
Serum Alpha Fetoprotein

scholarly journals ETERNAL SERUM ALPHA-FETOPROTEIN (AFP) SCREENING FOR NEURAL TUBE DEFECTS (NTDS)

1977 ◽  
Vol 11 (4) ◽  
pp. 528-528 ◽  
Author(s):  
Aubrey Milunsky ◽  
Elliot Alpert ◽  
Frederic O Frigoletto
Keyword(s):  
Neural Tube ◽  
Neural Tube Defects ◽  
Alpha Fetoprotein ◽  
Serum Alpha Fetoprotein

Experience of 300 cases of prenatal fetoscopic open spina bifida repair: Report of the International Fetoscopic Neural Tube Defect Repair Consortium.

2021 ◽  
Author(s):  
Magdalena Sanz cortes ◽  
Ramen H. Chmait ◽  
Denise A. Lapa ◽  
Michael A. Belfort ◽  
Elena Carreras ◽  
...  
Keyword(s):  
Spina Bifida ◽  
Neural Tube ◽  
Neural Tube Defect ◽  
Defect Repair ◽  
Open Spina Bifida
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