Epidermoid cyst

Case contributed by Dr Bita Abbasi



Patient Data

Age: 40 years
Gender: Male

There is a T2 hyperintense lesion without complete FLAIR suppression in the right cerebellopontine angle with restricted diffusion and rim enhancement. 

Case Discussion

The findings are characteristic for epidermoid cyst. Intracranial epidermoid cysts are the third common mass lesions in the CPA after acoustic schwannoma and meningioma. A helpful imaging finding in epidermoid cyst is restricted diffusion in DWI/ADC images that is a useful clue to differentiate the lesion from an arachnoid cyst. Enhancement is not seen after contrast administration, but peripheral wall enhancement is seen in some instances (as in this case). Note that a pronounced enhancement should prompt malignant degeneration.

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Case information

rID: 40160
Published: 9th Oct 2015
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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