Presentation
Headache.
Patient Data
MRI images show an extra-axial tumor at the right petroclival region, which extends into the right cavernous sinus and encases the right ICA. The tumor is solid and enhances vividly after contrast administration.
Axial and sagittal: asterisk - meningioma; arrow - dural tail sign; arrowhead - dorsum sellae
Coronal: asterisk - meningioma; arrow - petrous apex
Case Discussion
Meningiomas are the most common extra-axial tumors of the central nervous system and account for 14-20% of all intracranial neoplasms. They are a non-glial neoplasm that originates from the arachnoid cap cells of the meninges. Petroclival meningioma arises in the upper two-thirds of the clivus at the petroclival junction medial to the fifth cranial nerve.
This case is a presumptive diagnosis based on the typical imaging appearances, other differentials are felt unlikely.
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