[Prenatal diagnosis of cervico-facial malformations and tumors].

In populations at risk or, more often, fortuitously during routine examination, ultrasonography makes it possible to diagnose a fairly large number of facial abnormalities. The most frequent of these are microphtalmos, hypotelorism (often as part of holoprosencephaly), hypertelorism and cleft lip. It these abnormalities can be isolated, they may belong to various polymalformative syndromes. Cervicofacial tumours can also be detected, but in utero their histological type can only be suspected and the possibility of surgical treatment is difficult to evaluate.