Brain hemorrhages secondary to CAA are usually large and multiple. The mechanism of the bleeding is presumably due to increased fragility and britleness of the involved vessels, affected by the amyloid deposition. The widespread nature of these features is also believed to account for the occurrence of both multiple and recurrent brain hemorrhages. It has been estimated that approximately 20% of patients with CAA will eventually have an intracerebral bleeding, However, one must recognize that the only way to unequivocally diagnose CAA is through a brain/meningeal biopsy. Treatment of brain hemorrhages due to CAA is controversial. No medical treatment is available . Most experts recommend non-surgical management of these patients becase of concerns regarding fragility of the vessel wall involved with CAA, difficulty in controlling intraoperative hemorrhage, and the possibility of recurrent postoperative hemorrhage (as it may have happened with Prime Minister Sharon).
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from the article: Sharon's CT brain scan shows blood has been absorbed