Presentation
Headaches with cranial nerve deficits.
Patient Data
Age: 30 years
Gender: Female
From the case:
Intracranial epidermoid cyst
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The MRI sequences demonstrate an ill-defined lobulated extra-axial cystic mass, filling the prepontine and interpeduncular cisterns with upwards extension to the floor of the 3rd ventricle with mass effect on the midbrain. The mass encases the basilar artery as well the proximal segment of the posterior cerebral arteries. It appears isointense to the CSF on T1WI, T2WI, heterogeneous/dirty signal on FLAIR, and high signal on DWI (restricted diffusion). No enhancement was seen on the postcontrast sequence.
Case Discussion
MRI appearance characteristic of an epidermoid cyst.
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