Male, 73 years old, status post craniotomy for tumor resection. Compared to 2/19/2016, there has been evolution of postsurgical changes with decrease in blood products in the posterior fossa. Compared to 2/19/2016, there has been interval increase in heterogeneously enhancing tissue surrounding the resection cavity. The degree of FLAIR hyperintensity is minimally increased involving the cerebellar vermis and right greater than left cerebellar hemispheres. Partial effacement of the fourth ventricle is again seen. Ventricles remain not significantly changed in size with mild prominence, likely related to volume loss. No new lesions are seen elsewhere in the brain. A nonspecific focus of T2 hyperintensity within the white matter adjacent to the left frontal horn is unchanged. No evidence of significant intracranial mass effect, midline shift, or herniation.
Compared to 2/19/2016 there has been interval increase in heterogeneously enhancing tissue surrounding the cerebellar resection cavity, which given history of recent radiation may reflect posttreatment change, but suggest close follow-up to exclude the possibility of true tumor progression.