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Location, aneurysm type, and rupture status of 117 aneurysms (101 patients)

LocationaNo. of CasesTotal (n = 117)Bifurcation (n = 90)Sidewall (n = 27)
UnrupturedRupturedUnrupturedRupturedUnrupturedRuptured
High-risk location
    PcomA12 (10%)483315
    BA11 (9%)838201
    VA1 (1%)010001
    ACA8 (7%)352510
    AcomA28 (24%)72172001
    Subtotal60 (51%)2238203028
Low-risk location
    MCA36 (31%)27923940
    ICA21 (18%)13835103
    Subtotal57 (49%)40172614143
Total117 (100%)625546441611
  • Note:—AcomA indicates anterior communicating artery; PcomA, posterior communicating artery; VA, vertebral artery.

  • a ICA includes the internal carotid, ophthalmic, anterior choroidal arteries and the carotid tip; ACA includes the anterior cerebral and pericallosal arteries; BA includes the basilar, PICA, and superior cerebellar arteries.