Left carotico ophthalmic aneurysm, pointing superiorly measuring 7 x 6 x 7 mm with a 4 mm neck. No other aneurysms.
Particularly no right MCA bifurcation or distal aneurysms.No significant intra or extra cranial stenosis.
Bovine type arch anatomy with common origin of the right brachiocephalic and left common carotid arteries.
Conclusion: Left carotico-ophthalmic aneurysm as above. The pattern of distribution of the subarachnoid blood does not correlate with this aneurysm.