Sonographic demonstration of Galenic arteriovenous malformations in the neonate.

Cerebral arteriovenous malformation with aneurysmal dilatation of the vein of Galen often presents in the neonatal period with congestive heart failure. Five cases of galenic arteriovenous malformations diagnosed primarily by sonography are presented together with their angiographic and computed tomographic findings. A midline cystic structure posterior to the third ventricle with dilated straight sinus and torcular Herophili is typical of this entity.