CLINICAL CORRESPONDENCE Hemicrania continua with contralateral episodic cluster headache: a case report

The trigeminal autonomic cephalgias (TACs) are characterized by short-lasting unilateral headaches with autonomic features (1). They include four head-ache disorders, cluster headache (CH), paroxysmal hemicrania (PH), SUNCT syndrome and hemicrania continua (HC). The coexistence of different ipsilat-eral TACs in the same patient has been previously reported in six published cases (2–6). In five of these patients an association of CH and PH was noted (2– 5). The two varieties of attacks occurred separately in three patients, while their simultaneous occur-rence was observed in two cases. In another patient the successive occurrence of trigeminal neuralgia, SUNCT syndrome, PH and CH in one active head-ache period was noted (6). All the reported case