The factors that determine the appropriate treatment for ruptured dissecting aneurysms of the VA are tolerance of a test occlusion and the site of dissection. Favorable patient outcomes can be achieved when this algorithm is used.
Posterior cerebral artery aneurysms have specific clinical characteristics compared with aneurysms located elsewhere. The aneurysmal site and size and the surgical technique did not significantly influence treatment outcomes.
Rebleeding is the most important factor in unsatisfactory outcomes of patients with hemorrhagic moyamoya disease. Rebleeding seems to be age-related; rebleeding occurs at an increased rate when patients reach the age range of 46 to 55 years. Patients with hemorrhagic moyamoya must be followed up throughout their lives, even if their neurological status is excellent.
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