Table 2:

Aneurysm characteristics

Total No. of aneurysms treated500
Size
    Small304 (60.8%)
    Large176 (35.2%)
    Giant20 (4%)
Location
    Anterior circulation445 (89%)
        ICA240 (48%)
            Extradural14 (2.8%)
            Intradural226 (45.2%)
        ACA (A1)5 (1%)
        AcomA93 (18.6%)
        Distal ACA9 (1.8%)
        MCA (M1)11 (2.2%)
        MCA bifurcation82 (16.4%)
        Distal MCA5 (1%)
    Posterior circulation55 (11%)
        VA intradural7 (1.4%)
        PICA7 (1.4%)
        Vertebrobasilar junction3 (0.6%)
        Basilar artery22 (4.4%)
        SCA3 (0.6%)
        PCA (P1)12 (2.4%)
        Distal PCA1 (0.2%)
Previous treatment
    Balloon-assisted coiling27
    Primary coiling7
    Onyx embolization2
    Onyx + coil embolization1

  • Note:—ACA indicates anterior cerebral artery; AComA, anterior communicating artery; VA, vertebral artery; SCA, superior cerebellar artery; PCA, posterior cerebral artery.