Cluster headache and parietal glioblastoma multiforme.

INTRODUCTION: Cluster headache (CH) is a primary headache by definition not caused by any known underlying structural pathology. However, symptomatic cases have been described. The evaluation of CH is an issue unresolved. CASE REPORT: A 41-year-old man presented with a 3-month history of side-locked attacks of excruciating severe stabbing and boring right-sided pain located in the temple and the orbit. The attacks were associated with conjunctival injection and restlessness and migrainous features. The duration of attacks was about 30 minutes and the frequency 4 to 5 per 24 hours. His vital signs and physical and neurological examination were normal. A previous unenhanced brain computed tomography had been normal. A diagnosis of CH was made. The patient responded partially to treatment. Enhanced magnetic resonance imaging after 3 weeks displayed a right-sided parietal glioma with a surrounding edema and mass effect. After debulking, the headache attacks resolved completely. CONCLUSIONS: Contrast-enhanced magnetic resonance imaging should always be considered in patients with CH despite earlier normal head computed tomography/examinations. Late-onset CH represents a condition that requires careful evaluation. Parietal glioblastoma multiforme can present as CH