Gliomatosis cerebri and radiation therapy related changes. There are stable post-treatment findings in the brain and unchanged diffuse T2 hyperintensity involving the anterior cerebral hemispheres bilaterally with associated multiple cystic cavities. There is no evidence of associated abnormal intraparenchymal enhancement. There is a subcentimeter T1 hyperintense lesion in the left posterior body of the corpus callosum, which is compatible with a cavernous malformation. A punctate focus of susceptibility effect in the right posterior corpus callosum may also represent a cavernous malformation. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The ventricles and basal cisterns are unchanged in size and configuration, with diffuse cerebral volume loss. There is no midline shift or herniation. The skull and extracranial soft tissues are unchanged.
Stable post-treatment findings without evidence of tumor progression.