CT of vestibular schwannoma

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Author: Mikael Häggström [notes 1]


Choice of exam

In suspected vestibular schwannoma, MRI is the preferred modality and can provide tumor characterization, surgical planning and post-therapeutic evaluation. Where MRI is contraindicated CT of vestibular schwannoma can serve as an alternative.[1]


Contrast CT is necessary.[1] It should cover the temporal bone, and include thin slices for bone evaluation, as well as thicker slices for soft-tissue evaluation.


Bone evaluation may show erosion and widening of the internal acoustic canal by the tumor.[2]

The tumor itself may be difficult to see on CT. It may have hemorrhagic areas, and typically has no calcification.[2]


  1. For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.


  1. 1.0 1.1 Lin, E.P.; Crane, B.T. (2017). "The Management and Imaging of Vestibular Schwannomas ". American Journal of Neuroradiology 38 (11): 2034–2043. doi:10.3174/ajnr.A5213. ISSN 0195-6108. 
  2. 2.0 2.1 A.Prof Frank Gaillard. Acoustic schwannoma. Radiopaedia. Retrieved on 2018-10-25.