Atypical/anaplastic central neurocytoma. Status post resection. There is no significant change in size or morphology of the CSF filled resection cavity in the left parieto-occipital region. Again seen is slight mass effect on the trigone of the left lateral ventricle with associated slight prominence of the left temporal horn of the lateral ventricle, which appears similar to the prior study. Also unchanged is the pattern and extent of T2 hyperintensity within the surrounding parenchyma, consistent with gliosis. No new or suspicious enhancement is seen within or around the cavity. There is susceptibility artifact consistent with hemosiderin deposition along the walls of the surgical cavity. Unchanged additional scattered foci of susceptibility effect may be related to prior treatment.No pathologic enhancement is demonstrated elsewhere in the brain. No mass effect or parenchymal edema is suspected. A few scattered small nonspecific foci of T2 hyperintensity are evident in the cerebral hemispheres, not significantly changed. No intracranial hemorrhage or new extra-axial fluid collections are detected. The ventricles are stable in size and morphology.
Stable appearance of the left parieto-occipital resection cavity and surrounding gliosis. No evidence of tumor recurrence.