case_images: PMC11380906_01
case_images: (a) Computed tomography scan on admission showing subarachnoid haemorrhage on the left side of the perimesencephalic cistern. (b) Three-dimensional digital subtraction angiography (3D-DSA) performed on admission showing a saccular aneurysm measuring 1.9 mm at the neck and 2 mm in depth in the left internal carotid artery (ICA). (c and d) 3D-DSA on day 12 before and after parent artery occlusion with 25% n-butyl-2-cyanoacrylate performed for a dissecting aneurysm in the branch of the left superior cerebellar artery.
case_images: SNI-15-299-g001.jpg
case_images: PMC11380906_01_SNI-15-299-g001.jpg
case_images: F1
case_images: She was referred to our hospital after a computed tomography (CT) scan showed a subarachnoid hemorrhage on the left side of the perimesencephalic cistern [Figure 1a]. Digital subtraction angiography (DSA) performed on the same day revealed an aneurysm measuring 1.9 mm at the neck and 2 mm deep in the clinoid segment of the left ICA [Figure 1b]. However, a dissecting aneurysm measuring 2 mm was found on a branch of the left superior cerebellar artery (SCA), which was thought to be the source of the bleeding, and parent artery occlusion was performed urgently with 25% n-butyl-2-cyanoacrylate [Figure 1c and d].
case_images: (a) One year follow-up three-dimensional digital subtraction angiography showing spontaneous, almost complete occlusion of the Internal carotid artery (ICA) aneurysm with a slight bulge remaining at its neck. (b) Magnetic resonance angiography one year after disappearance of the aneurysm showing no apparent recurrence.
case_images: SNI-15-299-g002.jpg
case_images: PMC11380906_01_SNI-15-299-g002.jpg
case_images: F2
case_images: Notably, although the aneurysm of the left ICA was untreated, spontaneous, almost complete occlusion was achieved, with a slight bulge remaining at its neck [Figure 2a]. Magnetic resonance angiography 1 year after the disappearance of the aneurysm showed no apparent recurrence [Figure 2b].