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Cluster headache, paroxysmal hemicrania and short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT syndrome) are classified under trigeminal autonomic cephalalgia (TAC). The proposed revision of the international classification of headache disorders (ICDH-3 beta) adds hemicrania continua to this diagnostic group. Moreover, diagnostic criteria of the other TACs were modified and are characterized by persistent headache or headache attacks accompanied by cranial autonomic symptoms. The main difference between the various TACs is the duration of attacks. Differentiation is important because different pharmacological strategies are necessary.


C Gaul, D Holle, A May. Update on trigeminal autonomic cephalalgia]. Der Nervenarzt. 2013 Dec;84(12):1451-9

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PMID: 24212418

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