Meningioma status post CyberKnife in May 2014 and orbital pseudotumor. There are postoperative findings related to left suboccipital craniotomy for resection of a meningioma with encephalomalacia in the left cerebellar hemisphere. There is perhaps slight interval decrease in size of the tumor, which now measures up to 16 mm in thickness, previously 20 mm. However, the signal characteristics of the mass have change somewhat, with apparent increased enhancement. There is an unchanged nodular extra-axial lesion that is markedly T2 hypointense with susceptibility effect and mild peripheral enhancement along the floor of the left posterior fossa, adjacent to the craniotomy defect that measures up to 15 mm. There is unchanged mild nonspecific periventricular T2 hyperintensity. There is no evidence of acute infarct or hemorrhage. The ventricular system is stable in size and configuration. There are postoperative findings related to orbitozygomatic craniotomy with persistent diffuse enhancement of the right orbital fat and multiple extra-ocular muscles with associated impingement upon the optic nerve and proptosis, which is not significantly changed, accounting for differences in technique.
1.Perhaps slight interval decrease in size of the treated left posterior fossa meningioma, with evolution of the enhancement characteristics.2. An unchanged nodular extra-axial lesion min left posterior fossa adjacent to the craniotomy margin may represent an organizing hematoma. 3. Persistent inflammatory process in the right orbit with impingement upon the optic nerve.