An unusual etiology of subarachnoid hemorrhage, basilar artery perforator aneurysms, in Macao: Three case reports and review of literature

Figure 1 Case 1. A: Axial enhanced brain computed tomography of a 58-year-old female showed a tiny aneurysm found in the left superior cerebellar artery. Subarachnoid hemorrhage was noted; B: Three-dimensional reconstruction showed a 4.2 mm × 3.0 mm × 2.6 mm aneurysm found in the left superior cerebellar artery; C: Follow-up brain computed tomography (24 months post-operation) showed no new subarachnoid hemorrhage; D: Angiography showed the aneurysm noted on the left side of the basilar artery was clearly visualized by the frontal and lateral views; E: A 3.0 mm × 80.0 mm metallic coil was impacted into the aneurysm sac. Follow-up angiogram confirmed complete embolization and parent artery was intact.