Co-existence of bilateral fetal type posterior cerebral artery and the bilateral giant internal carotid artery aneurysms in an ataxic patient

Abstract

We encountered a very unusual case of bilateral unruptured iant internal carotid artery aneurysms in a patient with hypoplasic vertebrobasilar system. Fifty-five year old man admitted to ur outpatient clinic with the complaints of dizziness and imbalnce. The neurological exam was unremarkable except mild truncal taxia. Computed tomography (CT) and CT angiography (CTA) evealed two giant aneurysms; the right-sided one was a saccular nternal carotid artery (ICA) aneurysm (45 mm × 35 mm × 33 mm n size) extending to the posterior communicating artery and he left-sided one was a fusiform supraclinoid ICA aneurysm 26 mm × 16 mm × 15 mm in size) (Fig. 1A–C). Additionally, both