No Laughing Matter: Gelastic Migraine and Other Unusual Headache Syndromes

Primary and secondary headache disorders have established diagnostic criteria in the International Classification of Headache Disorders Mb, as well as classic findings, which although not part of the formal criteria are often suggestive of a particular diagnosis. At times, headache disorders can involve unusual symptoms that lack an identifiable secondary cause. This review will discuss some ofthese unusual symptoms, including headache associated auditory and olfactory symptoms, as well as two case reports involving gclastic migraine and migrainous thoracalgia.