MIAs (Mirror Intracranial Aneurysms): symmetry-related patient risk or consequence of multiplicity? - Takeaways - MDSpire

MIAs (Mirror Intracranial Aneurysms): symmetry-related patient risk or consequence of multiplicity?

  • By

  • Bartlomiej Roj

  • Rosa Sun

  • Lucie Ferguson

  • Nitin Mukerji

  • November 26, 2025

  • 0 min

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  • 1

    Intracranial Aneurysms (IAs) have a prevalence of 2%-3%, with a low rupture rate but high morbidity and mortality associated with aSAH.

  • 2

    Mirror Intracranial Aneurysms (MIAs) are a specific type of multiple IAs occurring bilaterally on corresponding arteries, often in high turbulent flow areas.

  • 3

    The study aimed to assess whether MIA status correlates with higher patient-level event rates and independent adverse outcomes.

  • 4

    Data was collected from 1,438 patients with unruptured IAs, using various imaging techniques and adhering to strict inclusion criteria.

  • 5

    MIA classification was confirmed by independent raters, achieving 98% agreement, to minimize bias in assessing aneurysm status.

Original Source(s)

MIAs (Mirror Intracranial Aneurysms): symmetry-related patient risk or consequence of multiplicity?

  • by Bartlomiej Roj, Rosa Sun, Lucie Ferguson, Nitin Mukerji

  • November 26, 2025

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