Publications by authors named "Helene Laurichesse-Delmas"

Article Synopsis
  • This clinical trial aimed to determine if daily low-dose aspirin could lower the risks of preeclampsia and fetal growth restriction in first-time pregnant women identified as high risk through early ultrasound screenings.
  • Conducted in France, the study involved over 1,100 participants who were randomly assigned to either take low-dose aspirin or a placebo from early pregnancy until the 34th week.
  • Results showed no significant difference in the rates of preeclampsia or low birth weight between the aspirin and placebo groups, leading to the conclusion that low-dose aspirin does not provide benefits for these outcomes in the targeted population.
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Objectives: Rhombencephalosynapsis (RES) is a very rare cerebellar malformation. Neurodevelopmental outcome of apparently isolated RES remains poorly documented and standardized cognitive assessment, reported in only nine published cases so far, is lacking. Prenatal counselling is challenging considering the uncertain prognosis of isolated RES.

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Objective: Principal objective of this work was to analyse the cost effectiveness of different sequences of cytogenetic techniques from the hospital's point of view, after prenatal ultrasound has identified fetal malformations.

Methods: Cytogenetic tests were performed for each case in 3 strategies, and their results are reported and compared to one reference strategy. Two new simulated strategies were considered: chromosomal microarrays alone and a direct test + CMA.

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Article Synopsis
  • Atypical fetal chromosomal anomalies (ACAs) are more common than thought and can impact fetal development, hence a new screening strategy for non-invasive prenatal testing (NIPT) was developed.
  • The screening was tested on two cohorts: Cohort A with 192 plasma samples (42 with ACAs) evaluated the test's performance, showing an 88.1% sensitivity and 99.3% specificity.
  • In Cohort B, involving 3,097 pregnant women, there was a 1.2% positive result rate for anomalies, indicating that this genome-wide NIPT can effectively screen for ACAs while requiring minimal additional invasive tests, especially for at-risk women.
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Although a rare disease, bilateral congenital anomalies of the kidney and urinary tract (CAKUT) are the leading cause of end stage kidney disease in children. Ultrasound-based prenatal prediction of postnatal kidney survival in CAKUT pregnancies is far from accurate. To improve prediction, we conducted a prospective multicenter peptidome analysis of amniotic fluid spanning 140 evaluable fetuses with CAKUT.

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Article Synopsis
  • - Sirenomelia is a rare and severe birth defect with unknown causes, characterized by fused legs and serious internal organ issues.
  • - Researchers studied nine families with this condition using advanced exome sequencing, identifying specific genetic variants in the CDX2 gene linked to two family cases, following an autosomal dominant inheritance pattern.
  • - The study suggests a genetic role in sirenomelia, revealing additional potential gene variants and emphasizing the importance of the Cdx and Wnt signaling pathways in its development.
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A laryngotracheoesophageal cleft, commonly called laryngeal cleft (LC), is a congenital malformation of the posterior part of the larynx creating an abnormal communication between the laryngotracheal axis and the pharyngoesophageal axis. The prenatal ultrasonographic features associating absent stomach, polyhydramnios and mediastinal "pouch sign" are usually considered pathognomonic for esophageal atresia. This observation demonstrates that they can also correspond to a severe form of laryngotracheoesophageal cleft extending to the carina.

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Background: The efficacy of prophylaxis to prevent prenatal toxoplasmosis transmission is controversial, without any previous randomized clinical trial. In France, spiramycin is usually prescribed for maternal seroconversions. A more potent pyrimethamine + sulfadiazine regimen is used to treat congenital toxoplasmosis and is offered in some countries as prophylaxis.

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Background: The different mechanisms leading to a solitary kidney should be differentiated because the long-term outcome might be different. The fetal period is the best moment to make a true diagnosis of congenital unilateral renal agenesis (URA). The objective was to determine the prevalence of URA at birth.

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Mucocoele of the Blandin-Nühn glands and teratomas of the tongue are rare in newborn babies. We present what is to our knowledge the first documented case of both at the same time, and describe management and follow up over 12 months after the birth. Prenatal diagnosis defined the treatment plan during delivery to establish an airway for the baby promptly.

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Article Synopsis
  • Transposition of great arteries (TGA) is a common congenital heart defect that is challenging to diagnose before birth, prompting this study to assess the impact of antenatal diagnosis on neonatal outcomes.
  • The study analyzed data from a French registry covering 94 cases of TGA between 1988 and 2012, dividing the cases into two time periods and two types of TGA: isolated and associated.
  • Results showed a significant increase in prenatal detection sensitivity and a notable decrease in neonatal mortality over time, particularly for isolated TGA, suggesting that advancements in medical management may have contributed to these improvements.
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Fetuses with increased nuchal translucency thickness (NT) are at increased risk for chromosomal abnormalities. In case of a normal karyotype, a minority of them may present with structural abnormalities or genetic syndromes, which may be related to submicroscopic chromosomal imbalances. The objective of this study was to evaluate whether MLPA screening of 21 syndromic and subtelomeric regions could improve the detection rate of small chromosomal aberrations in fetuses with increased NT and a normal karyotype.

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Background: The prognosis and early neonatal management of the VACTERL association depend mainly on the severity of malformations ascertained prenatally.

Methods: Here we reviewed the spectrum of clinical features observed in cases of VACTERL association ascertained prenatally through ultrasound examination but examined at birth and compared them with cases ascertained postnatally.

Results: From 1995 to 2011, a total of 19 cases of VACTERL association were observed in our center; 10 were ascertained prenatally and confirmed after birth whereas 9 were ascertained only after birth.

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Background: Congenital malformations occur in 3-4% of live births. Their prenatal detection is performed by ultrasound screening. Any announcement about a suspected malformation is a source of stress for the parents, and misdiagnosis during ultrasound screening can lead to expensive and sometimes iatrogenic medical interventions.

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Background: Wolf-Hirschhorn syndrome (WHS) is associated with facial dysmorphism including high forehead, high nasal bridge, hypertelorism and severe mental retardation. WHS results from a 4p16.3 deletion.

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Objectives: To assess the messenger ribonucleic acid expression in placental tissue of growth factors, cytokines, angiogenic and anti-angiogenic factors in one case of recurrent multiple chorioangiomas.

Methods: Complementary deoxyribonucleic acid array analysis was performed on the affected placentae and on normal placentaes (controls) to compare messenger ribonucleic acid levels of 96 genes involved in angiogenesis.

Results: Eleven genes presented more than two-fold alteration in expression levels: undetectable (angiopoietin 1, osteonectin, tyrosine kinase endothelial, neuropilin 1), decreased (transcription growth factor beta receptor 3, tissue inhibitor of metalloproteinase type 2, EGF receptor, integrin-alpha V, tyrosine kinase vascular endothelial growth factor receptor 2), increased (angiopoietin 2, osteopontin).

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