Biopsy of one of the lesion revealed glioblastoma (WHO grade IV). Give the location of the lesions and probable (albeit subtle) connecting T2 signal abnormality, this likely represents a multifocal rather than multicentric glioblastoma. 

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.