There is not a universal classification for the types of intracranial aneurysms, resulting in a heterogeneous mix of terms based on the morphology, size, location, and etiology 1,2:
Varying risk stratification models are utilized. These commonly include risk factors such as age, ethnicity, presence of subarachnoid hemorrhage, size and location of aneurysm.
1. Bonneville F, Sourour N, Biondi A. Intracranial Aneurysms: An Overview. Neuroimaging Clin N Am. 2006;16(3):371-82, vii. doi:10.1016/j.nic.2006.05.001 - Pubmed
2. Mizutani T, Miki Y, Kojima H, Suzuki H. Proposed Classification of Nonatherosclerotic Cerebral Fusiform and Dissecting Aneurysms. Neurosurgery. 1999;45(2):253-9; discussion 259. doi:10.1097/00006123-199908000-00010 - Pubmed
3. Greving J, Wermer M, Brown R et al. Development of the PHASES Score for Prediction of Risk of Rupture of Intracranial Aneurysms: A Pooled Analysis of Six Prospective Cohort Studies. Lancet Neurol. 2014;13(1):59-66. doi:10.1016/s1474-4422(13)70263-1
4. Wiebers D, Whisnant J, Huston J et al. Unruptured Intracranial Aneurysms: Natural History, Clinical Outcome, and Risks of Surgical and Endovascular Treatment. Lancet. 2003;362(9378):103-10. doi:10.1016/s0140-6736(03)13860-3 - Pubmed
5. Morita A, Kirino T, Hashi K et al. The Natural Course of Unruptured Cerebral Aneurysms in a Japanese Cohort. N Engl J Med. 2012;366(26):2474-82. doi:10.1056/NEJMoa1113260 - Pubmed