Cluster Headache Associated With Parainfluenza Virus, Preceded and Succeeded by Migraine

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.