Middle cerebral artery aneurysm epidemiology
Middle cerebral artery aneurysms, represent almost a third of all the intracranial aneurysms of the anterior circulation aneurysms. 18-40% of all intracranial aneurysms 1).
Among them, those located at M1 segment of the middle cerebral artery (from its origin up to the bifurcation) range between 2% and 7% of all the aneurysms.
Most MCA aneurysms have been found at the division of the M1-M2 junction due to hemodynamic stress or congenital factors 2).
Only in 1.1-1.7% of cases they are located in the distal segment 3) 4) 5).
The majority of distal MCA aneurysms are located at the M2 or M3 segments 6).
References
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, 5)
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Rinne J, Hernesniemi J, Niskanen M, Vapalahti M. Analysis of 561 patients with
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Lv N, Zhou Y, Yang P, Li Q, Zhao R, Fang Y, Xu Y, Hong B, Zhao W, Liu J, Huang
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Lee SH, Bang JS. Distal Middle Cerebral Artery M4 Aneurysm Surgery Using
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