Table 3

Aneurysm characteristics

No of aneurysms%
Total No of aneurysms10 845100
Location of aneurysms
 Anterior circulation aneurysms676662.4
  ICA273225.2
  MCA255223.5
  ACA120511.1
Posterior circulation aneurysms10149.3
 Basilar tip3182.9
 All others2432.2
Location not reported306528.3
Size (mm)*
 <10377134.8
 10–24170415.7
 ≥254764.4
 Not reported489445.1
Other aneurysm characteristics
 Thrombosed760.7
 Calcified300.3
  • *Regrouped size: aneurysms 7–12 mm were classified as small, 6–16 mm as large.

  • ACA, anterior cerebral artery; ICA, internal carotid artery; MCA, middle cerebral artery.