The Likelihood Ratio Database
acute narrow angle glaucoma
carotid/vertebral artery dissection
giant cell arteritis
intracranial hemorrhage / ischemic stroke
meningitis / encephalitis
venous sinus thrombosis
This is not an all inclusive database of differential diagnoses. It contains only immediately life-threatening possibilities. Note that some unlisted etiologies, while not immediately life-threatening, can become serious with time.