Table 1:

OA aneurysms: general characteristics and outcomes of endovascular coiling

Characteristics
No. of aneurysms and patients43 aneurysms, 43 patients
Age (yr) (mean)53.3 ± 10.4
Female/male33:10
Presentation
    Incidental42
    Visual disturbance0
    Ruptured1
Aneurysm direction
    Superior28 (65.1%)
    Medial14 (32.6%)
    Inferior1 (2.3%)
Aneurysm type
    ICA type19 (44.2%)
    OA type24 (55.8%)
Aneurysm size
    ≤5 mm23 (53.5%)
    5∼10 mm18 (41.8%)
    ≥10 mm2 (4.7%)
No. of aneurysms of other locations
    OA aneurysm only25 (58.1%)
    Multiple aneurysm18 (41.9%)
Depth-to-neck ratio
    ≤122 (51.2%)
    1.0∼1.516 (37.2%)
    ≥1.55 (11.6%)
Direction of aneurysm
    Superior27 (62.8%)
    Medial14 (32.5)
    Other2 (4.7%)
Initial occlusion result
    Complete occlusion14 (32.6%)
    Residual neck23 (53.5%)
    Residual aneurysm6 (13.9%)
Follow-up result
    Stable occlusion30 (85.7%)
    Minor recanalization4 (11.4%)
    Major recanalization1 (2.9%)