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CT angiographic depiction of a supraclinoid ICA fenestration mimicking aneurysm, confirmed with catheter angiography

Surgical and Radiologic Anatomy volume 29, pages 317–321 (2007)Cite this article

Abstract

Fenestrations (segmental duplications) of the intracranial arteries are rare anomalies that have been associated with aneurysms. Fenestrations of the supraclinoid ICA are extremely rare, with only a few reported cases. We present a supraclinoid ICA fenestration, which on axial CTA images initially mimicked an aneurysm, but was correctly delineated as a fenestration on multiplanar reformatted and 3D reconstructed images. Confirmation was made with conventional angiography. To our knowledge, this represents the first time that this rare variant has been identified with cross-sectional imaging. A review of the literature including proposed embryology is provided.

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Acknowledgments

The authors wish to thank Pierre Lasjaunias and Karel ter Brugge for reviewing the case and providing insights.

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Affiliations

  1. Neuroradiology Division, Department of Medical Imaging, Sunnybrook Health Sciences Centre, University of Toronto, 2075 Bayview Avenue, AG33A, Toronto, ON, Canada, M4N 3M5

    Aditya Bharatha, Allan J. Fox, Richard I. Aviv & Sean P. Symons

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  1. Aditya Bharatha
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  2. Allan J. Fox
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  3. Richard I. Aviv
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  4. Sean P. Symons
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Correspondence to Sean P. Symons.

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Bharatha, A., Fox, A.J., Aviv, R.I. et al. CT angiographic depiction of a supraclinoid ICA fenestration mimicking aneurysm, confirmed with catheter angiography. Surg Radiol Anat 29, 317–321 (2007). https://doi.org/10.1007/s00276-007-0205-5

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  • DOI: https://doi.org/10.1007/s00276-007-0205-5

Keywords

  • Fenestration
  • Internal carotid artery
  • Computed tomography
  • Digital subtraction angiography
  • Anatomic variation