Differential diagnosis for 'thunderclap headache' are all except:: (A) Encephalitis, (B) Ischemic stroke, (C) Subarachnoid hemorrhage, (D) Meningitis
Answer is B. Thunderclap Headache - Thunderclap headache is a severe headache that peaks within 60 seconds of onset, and its cause are: Subarachnoid hemorrhage: BERRY ANEURYSM Intracranial hypotension: DURAL ECTASIA / CSF Leak syndrome Reversible cerebral vasoconstriction syndrome Cervical aery dissection, Cerebral venous thrombosis Migraine Cluster headache Pituitary apoplexy