Acoustic schwannoma - trumpeted internal acoustic meatus sign

Case contributed by Dr Mohammad Taghi Niknejad


Sensorineural hearing loss and tinnitus.

Patient Data

Age: 40 years
Gender: Male

A well-defined mass at the left cerebellopontine angle widens the porous acusticus and extends into the internal auditory canal. The mass shows low signal on T1-weighted images and high signal on T2-weighted images. After contrast media injection, moderate homogenous enhancement is noted.

Case Discussion

This enhancing cerebellopontine angle mass in a patient with sensorineural hearing loss and tinnitus most likely represents acoustic (vestibular) schwannoma. Most acoustic schwannomas have an intracanalicular component and often result in widening of the porus acusticus resulting in the trumpeted internal acoustic meatus sign, which is present in up to 90% of cases.

PlayAdd to Share

Case information

rID: 63268
Published: 22nd Sep 2018
Last edited: 18th Dec 2019
Inclusion in quiz mode: Included
Institution: Tabesh medical imaging center

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.