History of left thalamic anaplastic astrocytoma status post biopsy (5/7/14), RT/TMZ and now cycle #5 of TMZ. Redemonstrated is a left frontal burr hole with gliosis along the course of prior biopsy approach. There is a stable intrinsically T2 and T1 hyperintense lesion in the left thalamus measuring up to 17 mm, previously 17 mm. There is also stable size of a left periatrial enhancing lesion measuring 5 mm, but with decreased associated T2 signal. There is slight interval increase in the nonenhancing T2 signal abnormality in the left corona radiata. There is no acute intracranial hemorrhage or acute infarct. There are unchanged foci of susceptibility artifact in the right cerebellar hemisphere as well as the left thalamic and periatrial lesions. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The skull and extracranial soft tissues are unremarkable.
1. Stable signal and size of the nonenhancing left thalamic lesion. 2. Stable size of enhancing left periatrial lesion, but with decreased associated T2 signal.3. Slight progression of ill defined non-specific white matter T2 hyperintensity in the left corona radiata.