PHASES and ELAPSS Scores Are Associated with Aneurysm Growth: A Study of 431 Unruptured Intracranial Aneurysms.

Background: Understanding risk factors for intracranial aneurysm growth is important for patient management. We performed a retrospective study examining risk factors for the growth of unruptured intracranial aneurysms followed at our institution, evaluating both traditional risk factors and the PHASES (Population, Hypertension, Age, Size, Earlier Subarachnoid Hemorrhage, Site) score.

Methods: We retrospectively reviewed a consecutive series of unruptured intracranial aneurysms followed at our institution for a minimum of 6 months over a 15-year period.