[Ultrasonography of an aneurysm of the great vein of Galien (author's transl)].

In a 15 day-old infant who presented with heart failure on the 4th day of life, the discovery of a continuous murmur at the level of the cranium led to suspicion of an aneurysm of the vein of Galien. Chest and neck profile X-rays showed an enlargement of the great vessels at the base of the heart and a thickening of the retropharyngeal soft tissues. Cerebral echotomography through the fontanelle showed an anechoic round area located in the posterior part of thalamus. Cerebral angiography confirmed the diagnosis.