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70. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC)
Joint Meeting mit der Skandinavischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

12.05. - 15.05.2019, Würzburg

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Anatomical predictors of superior cerebellar artery aneurysm rupture – radiological study of 81 consecutive patients

Anatomische Prädiktoren für Aneurysmenruptur der Arteriea superior cerebelli – radiologische Studie von 81 Patienten

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  • presenting/speaker Sajjad Muhammad - University of Helsinki and Helsinki University Hospital, Helsinki, Finland
  • Behnam Rezai Jahromi - University of Helsinki and Helsinki University Hospital, Helsinki, Helsinki, Finland
  • Hanna Lehto - University of Helsinki and Helsinki University Hospital, Helsinki, Finland
  • Mika Niemelä - University of Helsinki and Helsinki University Hospital, Helsinki, Finland

Deutsche Gesellschaft für Neurochirurgie. 70. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit der Skandinavischen Gesellschaft für Neurochirurgie. Würzburg, 12.-15.05.2019. Düsseldorf: German Medical Science GMS Publishing House; 2019. DocV288

doi: 10.3205/19dgnc307, urn:nbn:de:0183-19dgnc3073

Published: May 8, 2019

© 2019 Muhammad et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 License. See license information at http://creativecommons.org/licenses/by/4.0/.

Outline

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Objective: Superior cerebellar artery aneurysms (SCA) are infrequent posterior circulation lesions. Due to risks associated with surgical or endovascular treatment, it is still debateable which unruptured aneurysm should be electively treated. Anatomical and morphological characters may be helpful to predict the risk of rupture of an unruptured SCA aneurysm. This study aimed to identify morphological characters that could predict the rupture risk of superior cerebellar artery aneurysms

Methods: A retrospective analysis of CT angiography images of 81 consecutive patients harbouring superior cerebellar artery aneurysm who were treated between 1980–2014 at Helsinki University Hospital. Different anatomical characteristics including size, shape, neck width, aspect ratio, bottleneck factor, dominance side of vertebral artery, mid basilar artery angle and aneurysm to basilar artery angle were quantified. Rupture status was retrospectively documented from prospectively collected data base.

Results: Of the 81 analyzed superior cerebellar artery aneurysms 30 (37%) were unruptured and the remaining 51 (63%) presented with SAH. The mean size of unruptured SCA aneurysms was 6.2±6.3 where as the mean size of ruptured SCA aneurysms were 5.9±5.4. The mean aspect ratio was 0.9±0.3 in unruptured and 1.14±0.44 in ruptured cases. The bottleneck factor in unruptured SCA aneurysms was 1.21±0.60 and 1.48±0.81 in ruptured. The mean angle between basilar artery and aneurysm was 74.7±24.4 in unruptured and 65.9±23 ruptured cases. Interestingly, the patients with ruptured SCA aneurysm showed a significantly higher aspect ratio (Man-Whitney U, p=0.01) and smaller angle between aneurysm and basilar artery (Man-Whitney U, p=0.039).

Conclusion: The higher aspect ratio and lower angle between SCA aneurysm and basilar artery might be the predictive factors the SCA aneurismal rupture.

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