Legend Axial T2-WIs demonstrate a heterogeneous mass expanding the quadrigeminal cistern. It is iso- to hyperintense compared to the surrounding CSF signal. There is mass effect on the tectal plate and extension into the left choroidal fissure.

Legend FLAIR axial sequence proves the lesion to be solid and heterogeneous. No enhancement is evident on the T1WI with gadolinium.

Legend Sagittal T1-WI demonstrates mild hyperintensity compared to CSF. Note the hyperintensity and restricted diffusion on the DWIs. Key words: mri tumor neoplasia pineal region dwi

Brain Diagnosis: Epidermoid tumor