[Prenatal diagnosis of intracranial teratoma. Apropos of a case].

The authors report a case of fetal brain teratoma diagnosed at 21 weeks of amenorrhoea and leading to therapeutic termination of pregnancy. After a survey of the general features of intracranial teratomas the literature has been reviewed with a view to separating those elements that can lead to a definite diagnosis and those in a differential diagnosis. This case is unusual because of the diagnosis being made relatively early, thanks to ultrasound. This made it possible to avoid carrying out an unnecessary caesarean operation, which so often has to be done if the diagnosis is made late.