Cluster tic syndrome and other combinations of primary headaches with trigeminal neuralgia
Cluster tic syndrome (cluster headache and trigeminal neuralgia) and other combined tic syndromes are very rare and heterogeneously described as case reports in the literature. Three types of cluster tic syndromes can be distinguished: (i) simultaneously occurring trigeminal neuralgia and cluster headache according to the ICHD-2 criteria (most frequent); (2) attacks not fulfilling criteria for either cluster headache or trigeminal neuralgia but having features of both; (iii) secondary cluster tic syndrome. Trigeminal neuralgia can also co-occur with paroxysmal hemicrania (paroxysmal hemicrania tic) and with SUNCT. In case of co-occurrence of two primary headache syndromes, a combination of separate treatments aimed at the two headache syndromes is recommended. The pathophysiology of the tic combination syndromes is unknown.