Acoustic neuroma differential diagnosis
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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
Differential Diagnosis
The most frequent differential to be considered are:
- Meningioma
usually more homogeneous in appearance: significant signal heterogeneity with cystic or haemorrhagic areas is more typical of vestibular schwannoma than meningiomas (although cystic meningiomas do occur) meningiomas tend to have a broad dural base usually lack trumpet IAM sign calcification more common epidermoid no enhancing component very high signal on DWI does not widen the IAC metastasis uncommon usually does not remodel the IAC as metastases are usually present for only a short time ependymoma centered on the fourth ventricle does not extend into the IAC usually younger patients