Human Basilar Artery Abnormalities in the Prenatal and Postnatal Period

The fact that basilar fenestrations in adult specimens shared similar features with fetal ones and without aneurysms, as well as the fact that a basilar aneurysm was without fenestration in its base, lead us to hypothesis that the basilar fenestration is a vascular developmental variant related to the maintenance of vascular symmetry in the midline of the human brain base.