Acoustic schwannoma - intracanalicular

Case contributed by Ian Bickle
Diagnosis almost certain

Presentation

Mild left sided sensioneural hearing loss and tinnitus.

Patient Data

Age: 45 years
Gender: Male

1.2 cm avidly enhancing lesion in the intra-canalicular segment of the left internal auditory canal with a small internal cystic element.  Minor expansion of the canal.

No cerebellopontine angle component to the lesion.

Case Discussion

A proportion of vestibular schwannomas only involve the intracanalicular segment of the vestibular portion of the vestibulocochlear nerve (CN VIII).

This is the ice cream cone without any ice cream on top!

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