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Carotid Cavernous Fistula Mimicking Hemicrania Continua: A Case Report

Hemicrania continua is a primary headache disorder characterized by a continuous, unilateral headache associated with ipsilateral cranial autonomic features that responds to indomethacin. By definition, the symptoms are not referable to an underlying structural pathology. However, several cases of secondary hemicrania continua related to underlying structural lesions have been reported.