Table 1:

Aneurysm characteristics (n = 131)a

VariableFrequency
Location
 Trunk125 (95.4%)
 Bifurcation6 (4.6%)
 Branch arising from the sac49 (37.4%)
Topography
 Cavernous ICA13 (9.9%)
 Ophthalmic ICA89 (67,9%)
 Communicating ICA20 (15,2%)
 Carotid bifurcation2 (1.4%)
 AcomA3 (2.2%)
 MCA1 (0.7%)
 Basilar artery1 (0.7%)
 Vertebral artery2 (1.4%)
Size
 Small118 (90.1%)
 Large13 (9.9%)
Large neck
 No9 (6.9%)
 Yes122 (93.1%)
Rupture etiology1 (0.7%)
 Saccular130 (99.3%)
 Dissecting1 (0.7%)
Prior treatment4 (3%)
  • Note:—AcomA indicates anterior communicating artery; ICA, internal carotid artery; MCA, middle cerebral artery.

  • a Values expressed as absolute and relative frequency.