Snapshot A 58-year-old woman presents to the emergency department with a severe headache of sudden onset. The headache occurred immediately while at rest, and she describes the headache as the most severe she has ever had. Her headache symptoms are also accompanied by photophobia. She has tried ibuprofen and sumatriptan, but it has not improved her symptoms. Medical history is significant for migraine headache, hypertension, cigarette smoking, and alcohol use disorder. Physical examination is notable for nuchal rigidity. A non-contrast head CT is shown. (Subarachnoid hemorrhage) Saccular Aneurysm Clinical definition login to view 4 more bullets Saccular (berry) aneurysm login to view 20 more bullets Charcot-Bouchard Aneurysm Clinical definition login to view 8 more bullets