Ultrasonic evaluation of the Dandy-Walker syndrome.

Antenatal and postnatal ultrasonic findings of a case of cystic dilatation of the fourth cerebral ventricle (the Dandy-Walker syndrome) are presented. The triangular enlargement of the ventricle visualized ultrasonically was associated with mild widening of the lateral ventricles, and the finding was established postnatally by computer-assisted x-ray tomography.