TABLE 2

Causes of Thunderclap Headache12,13

Hemorrhage (subarachnoid, intracerebral, intraventricular)
RCVS
Sentinel headache
Cerebral venous sinus thrombosis
Cervical artery dissection
Spontaneous intracranial hypotension
Pituitary apoplexy
Retroclival hematoma
Ischemic stroke
Acute hypertensive crisis
Posterior reversible encephalopathy syndrome
Third ventricle colloid cyst
Tumor
Intracranial infection
Primary thunderclap headache
Primary cough, sexual, and exertional headache