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Hyperdense sylvian fissure MCA "dot" sign: A CT marker of acute ischemia.
Stroke
January 2001
Department of Clinical Neurosciences, University of Calgary, Seaman Family Magnetic Research Center, Calgary, Alberta, Canada.
Background And Purpose: The hyperdense appearance of the main middle cerebral artery (HMCA) is now a familiar early warning of large cerebral infarction, brain edema, and poor prognosis. This article describes the hyperdensity associated with embolic occlusion of branches of the middle cerebral artery in the sylvian fissure (MCA "dot" sign). We define it and determine its incidence, diagnostic value, and reliability.
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