Fenestrierung der Arteria cerebri anterior

Twin anterior

cerebral artery anomaly: Azygous ACA with fenestrated right A1 segment. MDCT angiography (coronal section) of intracranial vessels showing fenestration of A1 segment of ACA.

Twin anterior

cerebral artery anomaly: Azygous ACA with fenestrated right A1 segment. MDCT angiography (axial section) of intracranial vessels showing azygous ACA

Fenestrated

azygos A2 segment: a rare anatomic variation. a Coronal view of MIP images of brain CTA showing a fenestration at proximal part of an azygos A2 (Arrow). b 3D-Reconstruction of brain CTA from a coronal view highlighting the site of fenestration within an azygos A2 (Arrow)