What are middle cerebral artery (MCA) aneurysms?

Updated: Dec 06, 2018
  • Author: David S Liebeskind, MD, FAAN, FAHA, FANA; Chief Editor: Helmi L Lutsep, MD  more...
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Middle cerebral artery: Aneurysms of the middle cerebral artery, as shown below in the image and video, account for about 20% of aneurysms, typically at first or second division in the sylvian fissure. Aphasia, hemiparesis, hemisensory loss, anosognosia, or visual field defects may be noted.

Cerebral aneurysms. CT angiography of a right midd Cerebral aneurysms. CT angiography of a right middle cerebral artery aneurysm.
Cerebral aneurysms. Volume-rendered CT angiography of a left middle cerebral artery aneurysm.

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