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Updated: Jul 5, 2026
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Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
Published on: September 25, 2009
Patient and aneurysm characteristics in multiple intracranial aneurysms
F Baumann1, N Khan, Y Yonekawa
1Department of Neurosurgery, University Hospital Zurich, Zurich, Switzerland.
Acta Neurochirurgica. Supplement
|May 24, 2008
Summary
Multiple intracranial aneurysms, often smaller than 10mm, present unique challenges. Ruptured aneurysms were larger than unruptured ones in this study, informing patient management.
Area of Science:
- Neurosurgery
- Vascular Neurology
- Epidemiology
Background:
- Multiple intracranial aneurysms affect up to one-third of individuals with intracranial aneurysms.
- Retrospective review of epidemiological data, clinical information, and aneurysm characteristics in patients with multiple aneurysms.
Purpose of the Study:
- To analyze the characteristics of multiple intracranial aneurysms, including ruptured and unruptured types within the same patients.
- To provide data that may improve the management of patients with multiple intracranial aneurysms.
Main Methods:
- Retrospective review of 99 patients operated on for multiple intracranial aneurysms between 1994 and 2003.
- Data collected included aneurysm characteristics, clinical presentation (subarachnoid hemorrhage or incidental), and outcomes.
Main Results:
- The majority of patients were female (3:1 ratio), with a median age of 53.
- 265 aneurysms were identified (median 2 per patient); 34% were ruptured, 66% unruptured.
- Ruptured aneurysms were significantly larger (median 7mm vs. 4mm) and often located on the anterior communicating artery, typically 10mm or smaller.
Conclusions:
- Ruptured intracranial aneurysms in this cohort were larger than unruptured ones.
- Despite controversy, most ruptured aneurysms in this population were 10mm or smaller.
- Findings may aid in refining the management strategies for patients with multiple intracranial aneurysms.
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