Differentiation between intradural and extradural locations of juxta-dural ring aneurysms by using contrast-enhanced 3-dimensional time-of-flight magnetic resonance angiography

Toshiyuki Tsuboi, Koji Tokunaga, Tetsuro Shingo, Takahiko Itoh, Shinya Mandai, Kazushi Kinugasa, Isao Date

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background: Juxta-dural ring aneurysms of the ICA have different clinical outcomes and risks for SAH, which are dependent on their position in the intradural or extradural space. The aim of this study was to reveal the precise location of such aneurysms by using CE-MRA. Methods: Contrast-enhanced MRA studies were performed in 21patients with 24 juxta-dural ring aneurysms. The locations were evaluated by source images of CE-MRA and MPR images. We evaluated the accuracy of preoperative MRI findings by comparing imaging results with intraoperative findings in 7 cases. Results: The CS was clearly enhanced in the CE-MRA technique, which allowed the precise identification of these aneurysms as intradural or extradural. Intracavernous aneurysms were diagnosed when the greater hyperintensity of the aneurysm was located within the less hyperintense region of the contrast-enhanced CS. Nine of the cases were diagnosed as intradural aneurysms, and 15 aneurysms were noted as extradural based on the findings of CE-MRA. Surgery was performed in 7 cases, which included 4 intradural and 3 extradural aneurysms, and the preoperative MRI findings corresponded with the intraoperative findings in all cases. Conclusion: Contrast-enhanced MRA and MPR are very useful techniques for determining the location of juxta-dural ring aneurysms.

Original languageEnglish
Pages (from-to)381-387
Number of pages7
JournalSurgical neurology
Volume67
Issue number4
DOIs
Publication statusPublished - Apr 2007

Keywords

  • Cavernous sinus
  • Contrast-enhanced MRA
  • Extradural aneurysm
  • Intradural aneurysm
  • Juxta-dural ring aneurysm
  • Time-of-flight MRA

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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