Epidermoid cyst - cerebellopontine angle

Case contributed by A.Prof Frank Gaillard

Presentation

Headaches. Excision of right cerebellopontine mass 10 years earlier.

Patient Data

Age: Adult
Gender: Male
Modality: CT

The right cerebellopontine angle contains a near-CSF density lesion. Note the prior right sided craniectomy. 

Modality: MRI

A near-CSF intensity mass, with incomplete attenuation on FLAIR, is seen in the right CPA, characteristic of an epidermoid cyst. This is confirmed by the marked high signal on DWI. Note the prior right sided craniotomy. 

Case Discussion

This patient had a right sided cerebellopontine angle mass (shown to be an epidermoid cyst) excised 10 years previously. They were lost to followup until represented with symptoms relating to posterior fossa mass effect.

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Case Information

rID: 2609
Case created: 7th May 2008
Last edited: 4th Jan 2016
Inclusion in quiz mode: Included

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