White epidermoid

Case contributed by Dr Janki Trivedi


Memory loss and personality changes.

Patient Data

Age: 75
Gender: Male

T2 hyperintense and mixed T1 hyperintense extradural lesion measuring 4.7 cm in the right posterior fossa that demonstrates high DWI signal with areas of true diffusion restriction. 

Case Discussion

The patient proceeded to craniotomy and resection of the mass. 


MACROSCOPIC DESCRIPTION: An aggregate of tan yellow/light pink soft tissue 11x8x6mm.

MICROSCOPIC DESCRIPTION: Sections show a cyst wall lining with a thin layer of stratified squamous epithelium including a granular cell layer, with bland nuclear features and surface keratinization. The wall is fibrous with areas of infiltration by mononuclear chronic inflammatory cells with foreign body type multinucleate giant cells, in association with cholesterol clefts. There is no brain tissue identified. There is no evidence of malignancy.

DIAGNOSIS: Epidermal cyst.

PlayAdd to Share

Case information

rID: 61476
Published: 7th Jul 2018
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

Updating… Please wait.

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

 Thank you for updating your details.