Factors associated with rupture after coil embolization in untreated recanalized aneurysms in the unruptured groupa
| Untreated Recanalized Aneurysms (n = 20) | |||
|---|---|---|---|
| Unruptured (n = 16) | Ruptured (n = 4) | P Value | |
| Age (yr) | 67.0 (60.3–72.8) | 63.0 (55.8–70.3) | .570 |
| Sex | |||
| Male | 1 (6.3%) | 1 (25.0%) | .264 |
| Female | 15 (93.7%) | 3 (75.0%) | |
| Location | |||
| ICA | 5 (31.2%) | 1 (25.0%) | .937 |
| ICA-PcomA | 4 (25.0%) | 1 (25.0%) | |
| AcomA | 1 (6.3%) | 0 (0.0%) | |
| Posterior | 6 (37.5%) | 2 (50.0%) | |
| Dome | 9.2 (7.6–13.4) | 9.9 (6.6–11.1) | .813 |
| Neck | 5.5 (4.4–7.0) | 4.5 (3.2–8.8) | .741 |
| VER | 22.1 (13.9–26.1) | 25.1 (18.5–37.3) | .321 |
| Use of stent | |||
| No | 9 (56.3%) | 2 (50.0%) | .822 |
| Yes | 7 (43.7%) | 2 (50.0%) | |
| Type of recanalization on final DSA | |||
| II + IIIa | 10 (62.5%) | 0 (0.0%) | .025b |
| IIIb | 6 (37.5%) | 4 (100.0%) | |
| Aneurysm growth | |||
| No | 13 (81.3%) | 3 (75.0%) | .780 |
| Yes | 3 (18.7%) | 1 (25.0%) | |
Note:—ICA indicates ICA other than ICA-PcomA; VA, vertebral artery; BA, basilar artery; SCA, superior cerebellar artery; VER, volume embolization ratio; Posterior, posterior circulation including the VA, BA-SCA, and BA-bifurcation.
↵a Data are recanalized aneurysms in the unruptured group (n = 38): Twenty of 38 recanalized aneurysms were untreated. Among 20 untreated recanalized aneurysms, 16 aneurysms unruptured and 4 aneurysms ruptured.
↵b Statistical significance.