PMC3130362_01
Non-contrast brain computed tomography showing subarachnoid hemorrhage over the left frontal and parietal cortex (white arrow)
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F1
A non-contrast brain computed tomography revealed bleeding in the subarachnoid space over the left frontal and parietal cortex [Figure 1].
Four-vessel cerebral angiography showing bilateral stenosis of the supraclinoid segment of both internal carotid arteries and tortuous branches from the anterior and middle cerebral artery. These abnormal vessels were found anastomosing with branches from the posterior cerebral and middle meningeal arteries. (a and b) Left and right carotid arteries (antero-posterior view); (c) right carotid artery (lateral view); (d) left vertebral artery (lateral view)
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F2
An extensive search for aneurysms and vascular malformations was done, including a three-dimensional reconstruction from each projection of the four-vessel angiography, with no other abnormalities found [Figure 2].