First-trimester septated cystic hygroma in 40 year-old, P2 at 11 and 5/7 weeks’ gestation. Despite the suboptimal resolution, note the clear thin projecting septations. Non-invasive prenatal screening revealed increased risk of Trisomy 18. Despite extensive counseling the patient declined amniocentesis and elected to continue her pregnancy. Mid-trimester sonography noted: hypotelorism, bilateral clenched hands, spinal column deformity, and large bi-directional ventricular septal defect (VSD). At repeat Cesarean due to SROM and labor at 37 weeks’ gestation, a growth-restricted male neonate weighing 1775 gram was delivered. The neonate manifested dysmorphic features and structural congenital cardiac defects consistent with Trisomy 18, which was confirmed by neonatal karyotyping. The infant later succumbed at three months of life.

First-trimester septated cystic hygroma in 40 year-old, P2 at 11 and 5/7 weeks’ gestation. Despite the suboptimal resolution, note the clear thin projecting septations. Non-invasive prenatal screening revealed increased risk of Trisomy 18. Despite extensive counseling the patient declined amniocentesis and elected to continue her pregnancy. Mid-trimester sonography noted: hypotelorism, bilateral clenched hands, spinal column deformity, and large bi-directional ventricular septal defect (VSD). At repeat Cesarean due to SROM and labor at 37 weeks’ gestation, a growth-restricted male neonate weighing 1775 gram was delivered. The neonate manifested dysmorphic features and structural congenital cardiac defects consistent with Trisomy 18, which was confirmed by neonatal karyotyping. The infant later succumbed at three months of life.

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First-trimester septated cystic hygroma occurs in approximately 1 in 268 pregnancies and has long been associated with a markedly increased risk of fetal aneuploidy and, among euploid fetuses, an increased risk of structural anomalies primarily affecting the cardiac and skeletal systems. Invasive prenatal diagnosis - chorionic villus sampling and/o...

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... (24) La detección combinada del primer trimestre para la aneuploidía fetal obtuvo una utilización relativamente rápida en todo el mundo y se convirtió en el estándar de atención aceptado en muchas naciones. (25) Dentro del cribado se encuentran los biomarcadores en suero materno. ...
... Es probable se deban a un defecto en el desarrollo de los vasos linfáticos, como consecuencia de una hipoplasia generalizada con agenesia parcial del sistema linfático. (25) Es importante reconocer que la resolución del higroma quístico septado del primer trimestre no infiere un estado fetal euploide ni una anatomía fetal estructural normal, ya que se ha informado la resolución de este hallazgo ecográfico tardío del primer trimestre a pesar de la presencia de aneuploidía subyacente significativa y/o anomalías estructurales del feto. (25) Con frecuencia está asociado a la monosomía del X y otras aneuploidías. ...
... (25) Es importante reconocer que la resolución del higroma quístico septado del primer trimestre no infiere un estado fetal euploide ni una anatomía fetal estructural normal, ya que se ha informado la resolución de este hallazgo ecográfico tardío del primer trimestre a pesar de la presencia de aneuploidía subyacente significativa y/o anomalías estructurales del feto. (25) Con frecuencia está asociado a la monosomía del X y otras aneuploidías. En comparación con el aumento simple de la translucencia nucal, el higroma quístico se asocia con un riesgo cinco veces mayor de aneuploidía. ...
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