“…4,12,15,16,19) In addition, these series contained many aneurysms in the A 2 or A 3 segments. 4,12,15,16,19) Accessory ACA aneurysms frequently arise from the A 4 or A 5 segments, so clipping appears to be more suitable than coiling for treatment of these aneurysms. In fact, treatment outcomes by clipping seem to be favorable as in typical distal ACA aneurysm (Table 1).…”