[Prevention of neutral tube closure defects, apropos of a case of iniencephaly].

We present a newborn with a malformation in the central nervous system that isn't frequent, the ininencephaly: this consist in the absence of the squamous part of the occipital bone, exaggerated cervical-thoracic retroflexion, high raquischisis, and with other malformations. Died at half hour, by global insufficiency respiratory due lug hypoplasia, verify by necropsies. In the Clinic Hospital of the University of Chile the incidence is 1 in 40,000 life newborn. We review the prevent of the nerval tube defect with the use of folic acid in the diet of the future woman who is going to became pregnant.