[Fetal cystic hygroma antenatal diagnosis. Prognosis and management].

Fetal cystic hygroma is a rare congenital malformation. The incidence of this pathology is 1/700 pregnancies. This malformation can be seen at antenatal ultrasonography from the end of the first trimester of pregnancy. The prognosis depends on chromosome analysis, other ultrasound abnormality and the size of the fetal cystic hygroma. Starting from a case diagnosed in the prenatal follow up and from litterature review, the authors discusse the ultrasound diagnosis, prognosis and management of this malformation.