Secondary hemicrania continua: Case reports and a literature review

Hemicrania continua (HC) is an indomethacin responsive primary headache disorder. Secondary or symptomatic HC is associated with another neurological or non-neurological disease. We report three patients with secondary HC. We also review the literature to identify the clinical predictors of an underlying disease entity. Intracranial structural lesion, head and neck vessel pathology, and carcinoma lung should be suspected in every patient. The...