Importanţa patologiei anevrismelor cerebrale a crescut dramatic din cauza gradului sporit de accesibilitate la mijloace de investigaţie mai perfecţionate. Anevrisme cerebrale cu mărimea de 25 mm şi mai mult se consideră gigante. Noi prezentăm un caz clinic de observaţie, pe parcursul a 5 ani, a unui pacient, bărbat, 47 de ani, cu anevrism gigant al arterei bazilare. Datele obţinute permit de a conclude, că acest tip de anevrisme se manifestă cu un efect de masă şi complicaţii tromboembolice mai mult decât cu rupturi.

The importance of cerebral aneyrisms pathology dramatically increased with the progress of accesability to modern diagnostics’ methods. Cerebral aneurysm is considered giant if it is 25 mm and more in size. We present a case of 5 years’ term outcome of unrupted giant intracerebral aneurysm of basilar artery at a male patient aged 47. The fi ndings and a review of literature suggest that these types of cerebral aneurysm often present as mass effect lesion and thromboembolic complications rather than with ruptures.