This case elegantly demonstrates how intraparenchymal lesions can grow exophytically into the ventricles, mimicking intraventricular masses. The key observation is the degree of involvement of the thalamus and adjacent white matter. Compare this case with a similar-appearing case of central neurocytoma.

Note: IDH mutation status is not provided in this case and according to the current (2016) WHO classification of CNS tumors, this tumor would, therefore, be designated as a glioblastoma NOS.