In spite of a recent remarkable progress in operative results of @entity438 , a mortality rate of 2-8% appears to be unavoidable. In the present study, 53 @entity1756 were retrospectively analyzed to determine causative factors of unfortunate outcome (fair, poor and dead). Surgical results of 53 @entity1756 are shown in Table 1, where the outcome was unfortunate in 7 cases (17%). @entity1779 was responsible for 4 cases, two of which were @entity2553 for 3 cases. There were 13 cases with @entity1779 (25%) ranging from 21 mm to 68 mm in diameter. Although @entity1410 less than 40 mm in diameter localized in @entity1315 and yielded no @entity51 , those more than 60mm extended to the caudate nucleus or thalamus through the internal capsule and led to deep @entity772 (Table 2, Fig. 1). @entity1779 with the diameter between 50 to 60 mm seems to be critical in regard to postoperative outcome. @entity397 caused @entity1779 (50%) more frequently than single rupture (21%) and @entity439 with @entity1779 was liable to bleed (27%), resulting in @entity16 by marked enlargement of the @entity1410 (Fig. 2). Accordingly it is essential for the cases with @entity1779 to prevent rerupture. @entity510 and symptomatic @entity2553 were observed less frequently in @entity1410 group than in non- @entity1410 group. However, prophylactic treatment of @entity2553 is important even in the cases with @entity1779 since more than half of them suffer from relatively thicker @entity510 .

[Analysis of 53 XXXX ].

@entity438 :: ('MESH:D002532', 'Disease') :: ['ruptured middle cerebral artery aneurysms'] @entity510 :: ('MESH:D013345', 'Disease') :: ['Subarachnoid hemorrhage', 'subarachnoid clot'] @entity16 :: ('MESH:D009422', 'Disease') :: ['acute deterioration of neurological conditions'] @entity772 :: ('MESH:D003128', 'Disease') :: ['coma'] @entity51 :: ('MESH:D009461', 'Disease') :: ['neurological deficits'] @entity1410 :: ('MESH:D006406', 'Disease') :: ['hematomas', 'hematoma'] @entity1315 :: ('MESH:D004833', 'Disease') :: ['temporal or frontal subcortical areas'] @entity397 :: ('MESH:D012421', 'Disease') :: ['Repeated rupture'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysm'] @entity2553 :: ('MESH:D020301', 'Disease') :: ['vasospasm', 'fatal and postoperative vasospasm'] @entity1779 :: ('MESH:D002543', 'Disease') :: ['Intracerebral hematoma', 'intracerebral hematomas', 'intracerebral hematoma'] @entity1756 :: ('MESH:D017542', 'Disease') :: ['ruptured MCA aneurysms']
@entity438 :: (MESH:D002532,Disease) :: ['ruptured middle cerebral artery aneurysms']
