Table 2

Locations of aneurysms

LocationRupturedUnruptured
Anterior circulation535 (83.99%)870 (77.20%)
 ACA1532
 AcomA208110
 Anterior choroidal artery46
 C1 segment of ICA717
 Cavernous ICA028
 MCA3064
 OCA55401
 Paraclinoid ICA433
 PcomA210169
 ICA bifurcation210
Posterior circulation102 (16.01%)257 (22.80%)
 BA1353
 PCA1940
 PICA2828
 SCA32
 VA26131
 AICA133
Total6371127
  • ACA, anterior cerebral artery; AcomA, anterior communicating artery; AICA, anterior inferior cerebellar artery; BA, basilar artery; ICA, internal carotid artery; MCA, middle cerebral artery; OCA, ophthalmic carotid artery; PCA, posterior cerebral artery; PcomA, posterior communicating artery; PICA, posterior inferior cerebellar artery; SCA, superior cerebellar artery; VA, vertebral artery.