Short Article
Mary Kearney
Abstract
Migraine classification is the remit of the International Headache Society (IHS) and their most recent recommendations are contained in the International Classification of Headache Disorders (ICHD-3)1. These recommendations have been incorporated into the World Health Organization’s International Classification of Diseases (ICD-111) which was published in summer 2018. In addition to the main classification of migraine, the ICHD-3 includes an appendix which contains a number of additional migraine subtypes and associated variants. The appendix is used to present research criteria for a number of novel entities that have not been sufficiently validated by research conducted so far. It is anticipated that some disorders now in the appendix will move into the main body of classification at the next revision.