Journal of Ultrasound in Medicine, Vol 10, Issue 7 361-365, Copyright © 1991 by American Institute of Ultrasound in Medicine
Arteriovenous malformations. Locations and evolution in the fetal brain
C. H. Comstock and J. S. Kirk
William Beaumont Hospital, Department of Obstetrics and Gynecology, Royal Oak, Michigan 48073.
Almost all cerebral arteriovenous malformations in the fetus involve the
vein of Galen, although occasionally they may involve the frontal area of
the brain instead. In all reported cases arteriovenous malformations have
presented some time after 30 weeks as a sonolucent oval lesion located in
the midline behind the third ventricle. Previous scans have been normal.
Evidence of high output failure such as cardiomegaly, enlarged neck veins,
or hydrops predicts a poor outcome.