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Needs temporal artery biopsy, although treatment with high dose corticosteroids should be initiated prior to biopsy to avoid permanent vision loss as a result of ophthalmic artery involvement.
Giant cell arteritis
Migraine headache
Takayasu arteritis
Tension headache
Cluster headache
Benign paroxysmal positional vertigo
Meningitis/encephalitis
Carotid-cavernous fistula