Multiple Azygos Anterior Cerebral Artery Aneurysms with Concomitant Dysplasia of Corpus Callosum, a Lipoma and a Falx Meningioma : A Case Report

Abstract

We experienced a case with a ruptured aneurysm at the origin of azygos anterior cerebral artery(azygos ACA), and multiple aneurysms arising from the azygos trunk, which were not located at the vessel branching site. This case was also associated with hypoplasia of corpus callosum and a lipoma in the same part. This dysgenetic lesion, assumed to have formed in the patient's natural development suggests that aneurysms on the azygos ACA trunk may not necessarily result from the usual causal factors such as defect or hemodynamic stress, but instead develop due to the influenece of such development factors as dysgenesis of corpus callosum or the malnutrition of the vessel wall due to the presence of a lipoma.