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Neuroradiology

, Volume 57, Issue 1, pp 35–40 | Cite as

Clinical characteristics and preferential location of intracranial mirror aneurysms: a comparison with non-mirror multiple and single aneurysms

  • Young-Jun Lee
  • Tiago Parreira
  • Charles C. Matouk
  • Ravi Menezes
  • Daniel M. Mandell
  • Karel G. terBrugge
  • Robert A. Willinsky
  • Timo KringsEmail author
Interventional Neuroradiology

Abstract

Introduction

The purpose of our study was to compare the clinical characteristics and preferential localization of aneurysms in three patient groups: single aneurysm, non-mirror multiple aneurysms, and mirror aneurysms.

Methods

We retrospectively reviewed the clinical and radiological data of 2223 consecutive patients harboring 3068 aneurysms registered at the Toronto Western Hospital between May 1994 and November 2010. The patients were divided into single, non-mirror multiple, or mirror aneurysm groups. Expected incidences of mirror aneurysms at each location were calculated on the basis of the single aneurysm incidences at each location.

Results

Patients with mirror aneurysms (n = 197) did not differ from patients with non-mirror multiple aneurysms (n = 392) in having female predominance (81.7 vs. 76.3 %) or a family history of intracranial aneurysm (20.5 vs. 17.6 %). When compared with expected incidences at each location, mirror aneurysms were more frequently found at the cavernous internal carotid artery (30 vs. 11.5 %) (p < 0.0001). Mirror aneurysms involving the posterior circulation were less frequent (6.7 %) than aneurysms in the single (19.6 %) or non-mirror multiple aneurysm groups (18.9 %) (p < 0.05).

Conclusion

Patients with mirror aneurysms had similar clinical characteristics to non-mirror multiple aneurysm patients. Mirror aneurysms showed a predilection for the cavernous carotid artery, whereas they were comparatively rare in the posterior circulation.

Keywords

Aneurysm Intracranial aneurysm Mirror aneurysm Multiple aneurysm 

Abbreviations

NM

Non-mirror

ACA

Anterior cerebral artery

AComA

Anterior communicating artery

MCA

Middle cerebral artery

ICA

Internal carotid artery

AChA

Anterior choroidal artery

PComA

Posterior communicating artery

cavernous ICA

ICA below the origin of PComA

PCA

Posterior cerebral artery

BA

Basilar artery

SCA

Superior cerebellar artery

AICA

Anterior inferior cerebellar artery

PICA

Posterior inferior cerebellar artery

VA

Vertebral artery

Notes

Acknowledgments

The authors thank the members of the Toronto Vascular Malformation Study Group for many fruitful discussions and critical review of the manuscript.

Ethical Standards and Patient Consent

We declare that all human and animal studies have been approved by our local review board and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. We declare that all patients gave informed consent prior to inclusion in this study

Conflict of Interest

We declare that we have no conflict of interest.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Young-Jun Lee
    • 1
    • 2
  • Tiago Parreira
    • 3
  • Charles C. Matouk
    • 4
  • Ravi Menezes
    • 1
  • Daniel M. Mandell
    • 1
  • Karel G. terBrugge
    • 1
  • Robert A. Willinsky
    • 1
  • Timo Krings
    • 1
    • 5
    Email author
  1. 1.Division of Neuroradiology, Department of Medical Imaging, Toronto Western HospitalUniversity of TorontoTorontoCanada
  2. 2.Department of RadiologyHanyang University Hospital, Hanyang University College of MedicineSeoulSouth Korea
  3. 3.Hospitais da Universidade de CoimbraCoimbraPortugal
  4. 4.Departments of Neurosurgery & Diagnostic Radiology, Neurovascular & Stroke ProgramsYale University School of MedicineNew HavenUSA
  5. 5.Division of Neurosurgery, Toronto Western HospitalUniversity of TorontoTorontoCanada

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