Neuropsychological changes after surgery for anterior communicating artery aneurysm

Dementia resulting from expansion of basilar artery aneurysm: two case reports and a review of the literature

BACKGROUND

Dementia places a large burden on the economy, with financial and emotional costs incurred by patients, caregivers and the health sector.

METHODS AND RESULTS

We report the first published case series of giant basilar aneurysm leading to progressive cognitive and functional decline. We review the literature regarding giant aneurysms and their association with dementia and the possible underlying pathophysiological mechanism.

CONCLUSIONS

This report highlights a number of therapeutic considerations when determining the best management strategy for these difficult lesions.

Surgical treatment of unruptured cerebral aneurysms in the elderly

We retrospectively analyzed the prevalence and surgical outcomes of unruptured cerebral aneurysms in the elderly for the past five years. Between 1998 and 2002, we collected data from 575 subjects with unruptured aneurysms who had no history of subarachnoid hemorrhage (SAH). One hundred and eighty-two of these patients (31.7%) were aged > or = 70 years and they had 233 aneurysms. The proportion of older patients among all subjects increased significantly from 21.4% in 1998 to 40.3% in 2002. Unruptured aneurysms found in the elderly had a predominance of female, higher frequency of multiple aneurysms, and lower frequency of anterior communicating artery aneurysms when compared with those in the younger patients. The majority of intradural aneurysms detected in the elderly were less than 10 mm in diameter (84.8%). One hundred and eleven out of 224 intradural aneurysms in the elderly were treated (49.6%); most aneurysms were directly clipped, while only 13 aneurysms including six basilar artery aneurysms were coiled endovascularly. Among the 83 elderly subjects who underwent direct surgery, perioperative complication appeared in seven subjects (morbidity 8.4%, mortality 1.2%). No SAH occurred postoperatively and conservatively during 1-5 years of follow-up. Since the rupture rate of small unruptured aneurysms without SAH history is reported to be low, surgical indication should be considered with care particularly in the elderly.