Cerebral arteriovenous malformations in a pregnancy with twins: case report.

The natural course of cerebral arteriovenous malformations during pregnancy is not well known. An inoperable cerebral arteriovenous malformation was diagnosed by angiography, computed tomography, and magnetic resonance imaging before pregnancy and followed by magnetic resonance imaging during pregnancy. No significant changes were detected in the size of the cerebral arteriovenous malformation during pregnancy, and healthy twins were born by cesarean section.