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In most cases,there is no pathognomonic ultrasound finding for vertebral artery dissection.However,if a patient presents with suggestive symptoms, ultrasound may corroborate the clinical suspicion and aid in the decision regarding early anticoagulation treatment.A definite diagnosis can be made noninvasively when magnetic resonance imaging demonstrates hematoma in the vessel wall.Angiography yields additional information such as nature of underlying vascular disease,site and extent of dissection,intracranial extension and presence of pseudoaneurysm. |
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