PMC3130468_01
a) A 3D angiogram depicts a fusiform aneurysm in the distal segment of the right AICA. b) Superselective angiogram showing an aneurysm on the meatal loop of the right AICA. c) Selective vertebral artery angiogram (frontal view) shows complete occlusion of the aneurysm and the distal AICA. There is significant collateral retrograde flow into the AICA via the right superior cerebellar artery and the right posterior inferior cerebellar artery.
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F1
A diagnostic cerebral angiogram with three-dimensional (3D) reconstruction confirmed a small fusiform distal right AICA aneurysm [Figure 1a]. Therapeutics/Boston Scientific, Fremont, CA) was advanced over a Synchro 2 standard microwire into the AICA, until the tip was within the aneurysm [Figure 1b]. Therapeutics/Boston Scientific) were deployed. The aneurysm and the distal AICA were completely obliterated. There was a significant collateral retrograde flow into the distal right AICA via the right superior cerebellar artery (SCA) and the right posterior inferior cerebellar artery (PICA) [Figure 1c].
PMC3130468_02
a) A CT angiogram (axial view) depicts a distal left AICA aneurysm projecting into the left auditory canal. b) Selective vertebral angiogram (frontal view) showing a 2.5-mm aneurysm arising distal to the meatal loop of the left AICA. c) Postoperative angiogram demonstrating complete obliteration of the aneurysm with absent filling of the AICA. There is also an area of hypoperfusion in the inferior left cerebellar hemisphere
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F2
The CT angiogram demonstrated a 2.5-mm aneurysm of the distal left AICA, projecting within the left auditory canal [Figure 2a]. The left PICA was hypoplastic and the left AICA was filling the distal PICA territory [Figure 2b]. Postprocedure angiography demonstrated an area of hypoperfusion in the inferior left cerebellar hemisphere, in the expected territory of the left PICA [Figure 2c].