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Related Experiment Videos

Aneurysm size: a prognostic factor for rupture

Y Orz1, S Kobayashi, M Osawa

  • 1Department of Neurosurgery, Shinshu University School Medicine, Matsumoto, Japan.

British Journal of Neurosurgery
|April 1, 1997
PubMed
Summary
This summary is machine-generated.

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Small intracranial aneurysms less than 6 mm are not always harmless. These small unruptured aneurysms can rupture and require surgical consideration for effective patient management.

Area of Science:

  • Neurosurgery
  • Neurology
  • Vascular Neurology

Background:

  • Effective management of unruptured intracranial aneurysms requires prognostic criteria for rupture.
  • Aneurysm size is a key factor, but the critical size for rupture risk remains unknown.

Purpose of the Study:

  • To investigate the rupture risk of small intracranial aneurysms (< 6 mm).
  • To determine if surgical treatment should be considered for small unruptured aneurysms.

Main Methods:

  • Retrospective analysis of 1558 intracranial aneurysm patients operated on over 5 years.
  • Categorization of aneurysms by size (< 6 mm vs. larger) and rupture status (ruptured vs. unruptured).

Main Results:

  • 38% of ruptured aneurysms were small (< 6 mm), often on the anterior communicating artery.

Related Experiment Videos

  • Among unruptured aneurysms, 44.7% of single aneurysms and 50% of multiple aneurysms were small.
  • In patients with multiple aneurysms, small aneurysms were the ruptured source in 26.5% of cases.

    • Conclusions:

    • Small intracranial aneurysms (< 6 mm) are not innocuous and can be hazardous.
    • Surgical treatment should be considered for small unruptured aneurysms, regardless of size.