Trigeminal schwannoma

Case contributed by Dr Ahmed Abd Rabou

Presentation

Dizziness, disorientation and vertigo of acute onset

Patient Data

Age: 77 years old
Gender: Female
Modality: MRI

A well defined small extra axial mass is seen at the left cerebellopontine angle cistern just posterior to Meckel's cave at the location of the left trigeminal nerve. The lesion is hypointense on T1, slightly hyperintese on T2 with moderate enhancement on post contrast scan.

The contralateral trigeminal nerve is normal for comparison. Moreover, the patient had left paramedian tiny focus of acute pontine infarction that shows restriction on DWI.

Case Discussion

Trigeminal schwannoma is an extra axial tumor arises from the schwann cell lining of the trigeminal nerve.

SSFP sequences now provide detailed anatomy of the cranial nerves and the adjacent CSF cisterns.

Unfortunately the lesion wasn't excised and no pathological confirmation was available at time of publishing.

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Case Information

rID: 36649
Case created: 3rd May 2015
Last edited: 30th Jan 2016
Inclusion in quiz mode: Included

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