Neuroradiology Teaching File

Subarachnoid Hemorrhage

Rupture of an intracranial aneurysm is the most common cause of nontraumatic subarachnoid hemorrhage.

90-95% of all intracranial aneurysms are located in the carotid system. The anterior communicating artery is the most common site (30%), followed by the posterior communicating artery (25%) and the middle cerebral artery (20%).

Case prepared by Anthony L. Alcantara, MD

Related case from the University of Alabama at Birmingham Radiology Teaching File

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