Reason: preop planning for tumor resection History: vertigo, nausea The CSF spaces are appropriate for the patient's stated age with no midline shift. There is an extra-axial mass located at the right cerebellar medullary angle cistern and right cerebellopontine angle cistern which measures 9 x 16 mm in axial dimensions.No abnormal enhancing mass lesions are appreciated intracranially. No intracranial hemorrhage is identified. No edema is identified within the brain parenchyma.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
1.There is a right sided posterior fossa mass present which is suspected most likely to represent meningioma2.examination was performed for stereotactic guidance during surgery.