Potential alternative diagnoses
| Aneurysmal SAH |
|---|
| Primary angiitis of the CNS |
| Migraine |
| Cortical vein thrombosis |
| Pituitary apoplexy |
| Amyloid angiopathy |
| Hypertensive hemorrhage |
| PRES |
| Giant cell arteritis |
| Arterial dissection |
| Spontaneous intracranial hypotension |
| Meningitis |
Note:—PRES indicates posterior reversible encephalopathy syndrome.