History of ganglioglioma and subdural fluid collection, yearly follow up for changes. There are postoperative findings related to left temporal mass resection with interval decreased confluent T2 hyperintensity in the left temporal lobe, where there is parenchymal volume loss, but no evidence of abnormal intraparenchymal enhancement. The previously described exophytic cystic lesion in this region is no longer apparent. There is no significant interval change in the size of the left cerebral convexity subdural fluid collection, which measures up to 25 mm in width, with drainage catheter in position. Likewise, there is no significant interval change in the associated midline shift to the right, compression of the left cerebral hemisphere with focal tenting of the left frontal lobe to the overlying dura, and expansion of the overlying calvarium. However, the diffuse left hemisphere dural enhancement has subsided. The ventricles are unchanged in size and configuration, with partial effacement of the left lateral ventricle, but prominence of the right lateral ventricle. There is no evidence of acute infarction or intracranial hemorrhage. Fluid within the left mastoid air cells has resolved.
1. Post-treatment findings in the left temporal lobe region with decreased extent of the intraparenchymal signal abnormality.2. No significant interval change in the size of the left cerebral convexity subdural fluid collection, which measures up to 25 mm in width, and no significant interval change in the associated midline shift to the right and compression of the left cerebral hemisphere with focal tenting of the left frontal lobe to the overlying dura.