3.4cm avidly and homogenously enhancing convex mass with a broad meningeal attachment to the inferior aspect of the tentorium cerebelli and the adjacent petrous ridge. The mass covers the right internal auditory meatus and extends 1.4cm into the auditory canal, but without overt expansion.
Thin dural tail. No internal cystic change within the mass.
Moderate amount of mass effect of the brainstem, cerebellum and inferior aspect of the midbrain. The mass also contacts and displaces the right trigeminal nerve.
Mild displacement and effacement of the fourth ventricle. Mild hydrocephalus.