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A 22 year-old man developed the lightening onset of an explosive headache followed by nausea and vomiting.
(Left): cerebral angiogram, right internal carotid injection. Note the aneurysm near the origin of the anterior cerebral artery. This aneurysm is arising from the anterior communicating artery. (Right) CT scan. Note the subaranchnoid blood in the interhemispheric fissure, sylvian fissure and left occipital horn. Spontaneous subarachnoid hemorrhage is most often caused by a ruptured aneurysm. They usually present with sudden headache, nausea, and vomiting, often associated with signs of increased intracranial pressure. The anterior communicating artery is a common location for aneurysms.
The Electronic Curriculum is copyrighted 1998, Case Western Reserve University School of Medicine.