Abstract
Since the publication of preliminary results from the International Study of Unruptured Intracranial Aneurysms in 1998 there has been a great deal of debate concerning the natural history of these lesions and their attendant risk of aneurysmal subarachnoid hemorrhage. Therefore, the authors reviewed a selected number of crucial studies concerning this topic to determine the best evidence-based estimate of a rupture rate for these lesions. Based on this analysis, the yearly risk of bleeding for an unruptured intracranial aneurysm is estimated to be approximately 1% for aneurysms 7 to 10 mm in diameter. This risk of rupture increases with aneurysm size and it likewise diminishes as the size of the lesion decreases. This general rule serves as a reasonable interpretation of the results reported in the current body of literature.
Original language | English (US) |
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Pages (from-to) | E3 |
Journal | Neurosurgical focus |
Volume | 17 |
Issue number | 5 |
DOIs | |
State | Published - Nov 15 2004 |
Externally published | Yes |
ASJC Scopus subject areas
- Surgery
- Clinical Neurology