SUNCT (short-lasting unilateral neuralgiform headache with conjunctival injection and (earing) syndrome is characterized by short-lasting attacks of unilateral pain that are much briefer than those seen in any other trigeminal-autonomic cephalagia and very often accompanied by prominent lacrimation and redness of the ipsilateral eye.
A. At least 20 attacks fulfilling criteria B-D.
B. Attacks of unilateral orbital, supraorbital, or temporal stabbing or pulsating pain lasting 5-240 seconds.
C. Pain is accompanied by ipsilateral conjunctival injection and lacrimation.
D. Attacks occur with a frequency from 3 to 200 per day.
3History and physical and neurological examinations do not suggest any of the disorders, such as trigeminal neuralgia, idiopathic stabbing headache, cough headache, benign exertional headache, headache associated with sexual activity, or hypnic headache, or history and/or physical and/or neurological examinations do suggest such disorder but it is ruled out by appropriate investigations, or such disorder is present but attacks do not occur for the first time in close temporal relation to the disorder.
(Adapted with permission from Headache Classification Subcommittee of the International Headache Society. The International Classification of Headache Disorders, 2nd ed. Cephalalgia 2004;24:S9-S60, and from Blackwell Publishing.)
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