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Figure 1: case 11: (a) Right VA angiogram, lateral view, demonstrating an aneurysm located at left PICA tonsillomedullary segment. (b) Intraoperative angiogram demonstrating haemorrhage before Onyx injection. (c) Postoperative angiogram demonstrating aneurysm and parent artery occluded completely. (d) Head CT scan immediately after embolization demonstrating SAH and IVH

Figure 1: case 11: (a) Right VA angiogram, lateral view, demonstrating an aneurysm located at left PICA tonsillomedullary segment. (b) Intraoperative angiogram demonstrating haemorrhage before Onyx injection. (c) Postoperative angiogram demonstrating aneurysm and parent artery occluded completely. (d) Head CT scan immediately after embolization demonstrating SAH and IVH