Female, 53 years old, with a posterior fossa meningioma. Findings related to prior left suboccipital craniotomy are redemonstrated with stable left cerebellar encephalomalacia. Findings are also redemonstrated status post left temporal craniotomy with encephalomalacia in the left anterior temporal lobe.An enhancing mass is redemonstrated centered on the left petro-clival ligament. As before, the lesion invades the left cavernous sinus and Meckel's cave with extension into the prepontine cistern and left middle cranial fossa. There has been interval increase in size of the lesion, specifically extending further posteriorly causing increasing deformation of the leftward pons (best seen series 1401 image 10/30 and series 1501 image 15/33). The remaining boundaries of the lesion appear unchanged.A right frontal approach ventricular shunt catheter is in stable position. The ventricular system is normal in size. Mild diffuse dural enhancement is seen which may be secondary to prior surgery or shunting. No new intracranial lesions are seen. Mild scattered white matter T2 hyperintense foci are nonspecific and unchanged. No evidence of significant intracranial hemorrhage is detected.
The patient's left petroclival meningioma demonstrates interval increase in size, specifically extending further posteriorly causing increasing deformation of the leftward pons (best seen series 1401 image 10/30 and series 1501 image 15/33). The remaining boundaries of the lesion appear unchanged.