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Keywords:

  • cluster headache;
  • migraine;
  • parainfluenza virus

A serologically proven case of parainfluenza viral infection was associated with the onset and disapearance of cluster headache. The patient had long-standing migraine that ceased during the cluster headache period and recurred when the latter stopped. Possibly, the virus was neurally transmitted to the trigeminal-autonomic system, creating an inflammatory response that transiently precipitated cluster headache and obliterated migraine.