Cerebello-pontine Angle Epidermoid-MRI

On T1-weighted images, epidermoids are generally slightly hyperintense or isointense relative to gray matter. The lesions are usually isointense relative to CSF on T2-weighted images, but they may be slightly hyperintense. The center of these lesions usually has an internal architecture with areas of heterogeneity. Enhancement of portions of the rim may be seen after the administration of contrast material. The remainder of the lesion does not enhance. Diffusion-weighted imaging can now be used for these lesions epidermoids have markedly restricted diffusion and, therefore, high signal intensity on the diffusion-weighted trace images.

Epidermoid Tumour- Suprasellar location-CT

Here is a case of epidermoid tumour in the suprasellar location and it appeared bright on DWI.

Dr.Sumer K Sethi, MD
Sr Consultant Radiologist ,VIMHANS and CEO-Teleradiology Providers
Editor-in-chief, The Internet Journal of Radiology
Director, DAMS (Delhi Academy of Medical Sciences)

Epidermoid cyst of the pineal region

Epidermoid cysts constitute 0-2-1% of intracranial tumours and are generally found at the base of the brain. They rarely occur in the pineal region,in this case of a 17yr old girl, T1, T2, FLAIR and diffusion weighted images have been provided lesion was very bright on DWI and show no significant post gadolinium enhancement.

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