Unusual Appearances Of White Epidermoid Cyst On CT And MRI With Pathological Correlation – Two Case Reports

Abstract

Epidermoid cysts in brain are commonly seen as hypo dense lesions on CT scan, hypo intense on T1W MR imaging with no post contrast enhancement and show marked restricted diffusion on DWI. Rarely they are hyper intense on T1W imaging and referred as white epidermoid. We describe two unique cases of rare white epidermoid cyst with unusual CT and MR features that showed no restriction of diffusion on DWI with a signal drop on ADC Map.