History of left cerebellopontine angle meningioma resection: dizziness. There are postoperative findings related to retrosigmoid craniotomy for resection of a left cerebellopontine angle mass. There is a residual enhancing dural-based mass along the posterior aspect of the left petrous apex with underlying hyperostosis extension into the left internal auditory canal that measures up to 7 mm in thickness. There is minimal mass-effect upon the left pons. There is unchanged patchy T2 hyperintensity, enhancement, and susceptibility effect within the central pons, which may represent a telangiectasia. There are unchanged mildly The supratentorial structures are otherwise appears unremarkable and there is no evidence of acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits are grossly unremarkable.
Postoperative findings related to retrosigmoid craniotomy for resection of a left cerebellopontine angle mass with a residual enhancing dural-based mass along the posterior aspect of the left petrous apex with underlying hyperostosis extension into the left internal auditory canal that measures up to 7 mm in thickness, which is compatible with residual meningioma. 