Aneurysm location patterns and prevalence of contrast stasis
| Location | Total (n = 301) | No Contrast Stasis (n = 197, 65.4%) | Contrast Stasis (n = 104, 34.6%) |
|---|---|---|---|
| Internal carotid | 201 (66.8%) | 120 (61.0%) | 81 (77.9%) |
| Proximal intradural or ophthalmic | 131 (43.5%) | 74 (37.6%) | 57 (54.8%) |
| Posterior communicating | 35 (11.6%) | 22 (11.2%) | 13 (12.5%) |
| Bifurcation | 13 (4.3%) | 12 (6.1%) | 1 (1.0%) |
| Other | 22 (7.3%) | 12 (6.1%) | 10 (9.6%) |
| Anterior choroidal | 7 (2.3%) | 7 (3.6%) | 0 (0.0%) |
| Cavernous | 14 (4.7%) | 4 (2.0%) | 10 (9.6%) |
| Cervical | 1 (0.3%) | 1 (0.5%) | 0 (0.0%) |
| Anterior cerebral | 34 (11.3%) | 25 (12.6%) | 9 (8.7%) |
| Anterior communicating | 29 (9.6%) | 23 (11.6%) | 6 (5.8%) |
| Proximal to anterior communicating | 3 (1.0%) | 0 (0.0%) | 3 (2.9%) |
| Pericallosal | 2 (0.7%) | 2 (1.0%) | 0 (0.0%) |
| Middle cerebral | 31 (10.3%) | 28 (14.3% | 3 (2.9%) |
| Proximal to bifurcation | 8 (2.7%) | 8 (4.1%) | 0 (0.0%) |
| Bifurcation | 23 (7.6%) | 20 (10.2%) | 3 (2.9%) |
| Distal to main bifurcation | 0 (0.0%) | 0 (0.0%) | 0 (0.0%) |
| Posterior circulation | 35 (11.6%) | 24 (12.1%) | 11 (10.5%) |
| Basilar bifurcation | 17 (5.6%) | 12 (6.1%) | 5 (4.8%) |
| Basilar trunk | 1 (0.3%) | 1 (0.5%) | 0 (0.0%) |
| Posterior cerebral | 1 (0.3%) | 1 (0.5%) | 0 (0.0%) |
| Superior cerebellar | 5 (1.7%) | 3 (1.5%) | 2 (1.9%) |
| Anterior inferior cerebellar | 1 (0.3%) | 1 (1.0%) | 0 (0.0%) |
| Posterior inferior cerebellar | 1 (0.3%) | 1 (0.5%) | 0 (0.0%) |
| Other | 9 (3.0%) | 5 (2.5%) | 4 (3.8) |
| Vertebral | 9 (3.0%) | 5 (2.5%) | 4 (3.8%) |