[Introduction of noninvasive prenatal testing for fetal trisomies: preliminary results and consequences on invasive samplings].

Noninvasive prenatal testing (NIPT) has marked a revolution in aneuploidy screening because it allows a simple maternal blood test to detect trisomy 21, 18 and 13 in a foetus with a very high level of accuracy. After one year of NIPT utilisation with 683 samples, we analyzed retrospectively the performance of the test for 2014 : 3 positive samples (2 trisomies 21 and 1 trisomy 18) were correctly detected (100% sensitivity) and no foetal aneuploidy was missed for the pregnancies having already resulted in delivery by decembre 2014 (280 true negatif, 100% specificity). However, the additionnally available analysis of the sex chromosomes resulted in 2 erronous results: 1 uncorrect sex determination (1 male resulting in a female phenotype at birth) and 1 result suggesting a Turner syndrome was not confirmed by amniocentesis.

Use of three-dimensional ultrasound to establish the prenatal diagnosis of Fryns syndrome.

Three-dimensional (3D) imaging permits surface reconstructions that allow a better view of the appearance of organs. We report a case of a fetus with cystic hygroma diagnosed at 11 weeks of gestation, associated with a diaphragmatic hernia. With the 3D reconstruction, we examined the fetal face much more easily, which presented facial dysmorphology, retrognathia, macrostomia and a broad nasal bridge.