Acoustic neuroma CT: Difference between revisions

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==Overview==
==Overview==
==CT==
==CT==
Contrast-enhanced [[Computed tomography|CT]] will detect almost all acoustic neuromas that are greater than 2.0 cm in diameter and project further than 1.5 cm into the cerebellopontine angle. Those tumors that are smaller may be detected by [[MRI]] with [[gadolinium]] enhancement. Audiology and vestibular tests should be concurrently evaluated using air conduction and bone conduction threshold testing to assess for sensorineural versus conduction hearing loss.
CT may show erosion and widening of the internal acoustic canal. The density of these tumours on non-contrast imaging is variable, and often they are hard to see, especially on account of beam hardening and streak artifact form the adjacent petrous temporal bone. Contrast enhancement is present, but can be underwhelming, especially in larger lesions with cystic components.
 
==References==
==References==
{{reflist|2}}
{{reflist|2}}

Revision as of 17:22, 17 September 2015

Acoustic neuroma Microchapters

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]

Overview

CT

CT may show erosion and widening of the internal acoustic canal. The density of these tumours on non-contrast imaging is variable, and often they are hard to see, especially on account of beam hardening and streak artifact form the adjacent petrous temporal bone. Contrast enhancement is present, but can be underwhelming, especially in larger lesions with cystic components.

References

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