Presentation
Hypertensive and chronic smoker
Patient Data
Well-defined extra-axial right cerebellopontine angle (CPA) cistern mass extending into the internal auditory canal, which shows low signal on T1 weighted images and heterogenous hyperintensity in T2 weighted images. After contrast administration, the mass show intense contrast enhancement. No diffusion restriction of mass. The mass gives the appearance of ice cream cone, intracanalicular component representing the cone and CPA cisternal component the ice cream ball.
Age related changes with T2 and FLAIR white matter hyperintensities are noted.
Case Discussion
Vestibular schwannoma is also known as acoustic neuroma. It refers to a benign schwannoma of 8th cranial nerve which accounts for about 8% to 10% of all intracranial tumors and about 80% of cerebellopontine angle tumors. It arises from the vestibular division of the nerve. Acoustic neuroma is a slow growing tumor that arise from the nerve sheath and consist of schwannoma cells in collagenous matrix. They usually arise in the within the internal auditory canal, but they occasionally develop in the cerebellopontine angle medial to the porus acusticus. They are usually unilateral and are non-heritable.