[Prospective study of the clinical features of cluster headache].

Introduction: Although cluster headache (CH) is one of the most severe human pain syndromes, its symptoms and therapeutic possibilities may be suboptimally recognised in current medical practice in Hungary.

Aim: To present the clinical characteristics of CH based on a prospective study of patients attending the Headache Service of the Department of Neurology, Semmelweis University.

Methods: We collected information about the symptoms, diagnosis and previous treatment of CH patients by filling in a 108-item questionnaire during outpatient visits.

Results: In the 5-year period between 2004 and 2008 we obtained data from 78 CH patients (57 males and 21 females; mean age: 44.6 +/- 14.6 years). The male:female ratio did not change in subgroups based on disease onset (calendar years). Ninety-three percent considered CH the most severe pain state of their life. The pain was strictly unilateral, affecting the territory of the 1st trigeminal division in all patients. The attacks were accompanied by signs of ipsilateral cranial parasympathetic activation (lactimation 83%, conjunctival injection 67%, rhinorrhea 56%, nasal congestion 43%); less frequently, signs of sympathetic dysfunction (ptosis 48%, miosis 7%) were also present. Two patients had attacks showing the typical localisation, severity and time course of CH attacks, but not accompanied by autonomic phenomena. A considerable part of the patients also observed symptoms that are usually ascribed to migraine (nausea 41%, vomiting 18%, photophobia 68%, phonophobia 58%). This may have been instrumental in the fact that, regardless of the characteristic clinical symptoms, the diagnosis of CH took 10 years on average. At the time of their examination 63% of patients were not using adequate abortive medications and 59% did not have an adequate prophylactic measure.

Discussion: Cluster headache is characterised by attacks of devastating pain that warrant an early diagnosis and adequate treatment. Our study underlines that information about the diagnosis and therapy of CH should be emphasized on occasions of neurology specialty training and continuing medical education.