“…In glioblastoma patients, ten studies investigated overall survival (OS) 26 , 27 , 28 , 30 , 31 , 33 , 34 , 36 , 37 , 38 ; four studies investigated progression free survival (PFS) 26 , 27 , 36 , 37 ; one study investigated early discontinuation of treatment due to toxicity and/or disease progression 37 ; and two studies investigated treatment-related complications. 31 , 37 For patients with brain metastases, five studies investigated OS 8 , 24 , 25 , 29 , 32 and one study investigated PFS. 24 Two studies investigated OS in PCNSL patients 4 , 35 while only one study investigated PFS in the same condition.…”