The patient went on to have a resection which confirmed the diagnosis of glioblastoma.

Histology

• Neoplastic cells positive for GFAP (polyclonal)
• Negative for EMA
• Strong nuclear staining for P53 (D0-7)
• Ki-67 positive in 15%

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.