Fig. 9.

Radiologic findings in a 70-year-old female patient presenting a right-hemisphere non-traumatic SAH with tetraventricular inundation. a Cerebral non-enhanced CT showing SAH and intraventricular haemorrhage. b Cerebral CTA showing a dissecting aneurysm of the right antero-inferior cerebellar artery. c Angiogram of the right vertebral artery in arterial phase confirming the dissecting aneurysm of the right antero-inferior cerebellar artery (white arrow). d Right common carotid angiogram showing the typical string-of-beads aspect, in favour of FMD. e Cerebral 3D volume-rendered CTA of the dissecting aneurysm of the right antero-inferior cerebellar artery (white arrows)