PCNSL	Primary central nervous system lymphoma
MRI	Magnetic resonance imaging
PFS	Progression-free survival
OS	Overall survival
HD-MTX	High-dose methotrexate
WBRT	Whole-brain radiotherapy
IELSG	International Extranodal Lymphoma Study Group
MSKCC	Memorial Sloan-Kettering Cancer Center
CSF	Cerebrospinal fluid
DLBCL	Diffuse large B-cell lymphoma
KPS	Karnofsky Performance Status
ECOG	Eastern Cooperative Oncology Group
LDH	Lactate dehydrogenase
HR	Hazard ratio
CI	Confidence interval
CR	Complete response
PR	Partial response
SD	Stable disease
PD	Progressive disease
ORR	Overall response rate
RT	Radiotherapy