Benign neoplasm of cerebral meningesClinical question: s/p tumor resectionSigns and Symptoms: s/p tumor resectionComments: Please obtain thin cuts through CP angle The CSF spaces are appropriate for the patient's stated age with no midline shift. The cerebellar tonsils extend approximately 2 mm below the level of the foramen magnum.The patient is status post removal of a left cerebellar pontine angle cistern mass in the left suboccipital craniotomy site just behind the mastoid. There is some signal hyperintensity within the subdural space adjacent to the left cerebellar hemisphere at the surgical site. There is soft tissue swelling present along the overlying skin tissues. There is some thickening of the dura anterior lateral to the brainstem at the left cerebellopontine angle cistern. This measures approximately 6 x12 mm axial dimensions and 6 x 15 mm sagittal dimensions.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 demonstrate mild mucosal thickening in the sphenoid sinus.. The visualized portions of the mastoid air cells demonstrate minor opacities in the left mastoid air cells. The visualized portions of the orbits are intact.
Since the prior exam patient has undergone left cerebellopontine angle cistern surgery for removal of a mass. There is a small lesion present at the left cerebellopontine angle cistern which is suspected to represent some residual neoplasm. There is some residual postoperative swelling.