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Cerebral microaneurysms found incidentally during aneurysm surgery.

J Inamasu1, S Suga, T Horiguchi

  • 1Department of Neurosurgery, Keio University School of Medicine, Tokyo, Japan. georges@med.keio.ac.jp

Neurological Research
|June 29, 2001
PubMed
Summary

Incidental cerebral microaneurysms are found in nearly 5% of patients undergoing surgery for known cerebral aneurysms. Awareness is crucial for neurosurgeons and neuroradiologists to consider treating these small, often contiguous, lesions.

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Area of Science:

  • Neurosurgery
  • Neuroradiology
  • Vascular Neurology

Background:

  • Cerebral microaneurysms are often discovered incidentally during surgical procedures for other diagnosed cerebral aneurysms.
  • The frequency and characteristics of these incidental findings require further investigation.

Purpose of the Study:

  • To retrospectively summarize the frequency and angiographic features of incidental cerebral microaneurysms.
  • To inform neurosurgeons and interventional neuroradiologists about these incidental findings.

Main Methods:

  • Retrospective review of patients undergoing surgery for cerebral aneurysms.
  • Identification and analysis of incidentally discovered microaneurysms.

Main Results:

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  • Seventeen patients (4.9%) had incidental microaneurysms.
  • The middle cerebral artery (MCA) was the most common location (41%).
  • MCA microaneurysms were often adjacent to larger, known aneurysms.

    • Conclusions:

    • Neurosurgeons and interventional neuroradiologists must be vigilant for incidental microaneurysms during aneurysm surgery.
    • Surgical treatment may be justified due to minimal additional risk and potential benefit of preventing rupture or growth.