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Trumpeted internal acoustic meatus sign

Dr Yuranga Weerakkody and Dr Frank Gaillard et al.

A trumpeted internal acoustic meatus is an indirect sign of an acoustic schwannoma and is useful in helping differentiating between one and other cerebellopontine angle entities, especially from a meningioma which typically does not extend into the meatus ¹.

References

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1. Brand S, Rosenberg PE. PROBLEMS IN AUDITORY EVALUATION FOR NEUROSURGICAL DIAGNOSIS. J Speech Hear Disord. 1963;28 : 355-61. J Speech Hear Disord (link) - Pubmed citation