Improvement of chronic headache after treatment of unruptured intracranial aneurysms

Objective.-The objective of this study is to determine the incidence, character, and outcome of headache in patients with unruptured intracranial aneurysms who had been treated to avoid the risk of rupture. Background.-There are a variety of clinical manifestations associated with unruptured intracranial aneurysms. Among them, chronic headache is the most common presenting and/or accompanying symptom. Methods.-Among the 137 patients with unruptured aneurysms who had been treated, we collected 81 patients excluding 30 on the basis of inclusion criteria. Twenty-six patients were lost to follow-up. We collected data by medical record review and a telephone survey. Included in the information collected was the analysis of presenting symptom, location and size of each aneurysm, location, quality, intensity and duration of headaches, associated symptoms, triggering and alleviating factors, and precipitating events. Results.-Forty-nine patients (60.5%) of 81 had chronic headaches before the diagnosis of unruptured intracranial aneurysm. Forty-four patients (89.8%) answered that their headaches were improved slightly (12 patients) or markedly (32 patients) (P < .05). The clinical pattern of the headache worsened in only 1 patient and did not change in 4 patients. When the surgical group (40 patients) and the coil embolization group (41 patients) were compared, there was no significant difference observed in outcome (P >.05). Conclusion.-Either by employing the technique of clipping or by coil embolization, treatment of unruptured intracranial aneurysms resulted in relief of headaches in majority of patients who had headaches pre-operatively.