Cerebral microaneurysms found incidentally during aneurysm surgery

J. Inamasu, S. Suga, T. Horiguchi, K. Akaji, K. Mayanagi, T. Kawase

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Not uncommonly, cerebral microaneurysms are found incidentally during surgery for another previously diagnosed cerebral aneurysm(s). The frequency and angiographic characteristics of such incidental microaneurysms are retrospectively summarized. Seventeen patients were identified as harboring incidental microaneurysms, comprising 4.9% of the whole series. The middle cerebral artery (MCA) was the most frequent location (seven cases, 41%) of these microaneurysms. There was a tendency for MCA microaneurysms to be contiguous to a previously known, larger aneurysm at the same location. Neurosurgeons as well as interventional neuroradiologists should be aware of the possible presence of these incidental microaneurysms while treating patients with a cerebral aneurysm(s). Although the actual clinical implications of these incidental microaneurysms have not been elucidated, the few additional risks to patients already surgically exposed for the treatment of another aneurysm, along with the possible benefit of preventing their rupture and growth, would justify the surgical treatment of these microaneurysms.

Original languageEnglish
Pages (from-to)304-308
Number of pages5
JournalNeurological Research
Issue number4
Publication statusPublished - 2001


  • Angiogram
  • Clipping
  • Incidental
  • Microaneurysm
  • Wrapping

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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