Footnotes

• Twitter @kaulen_leon, @HdNeurooncology

• CS and LDK contributed equally.

• Correction notice This article has been corrected since it first appeared Online First. Author name has been corrected to Wolfgang Wick.

• Contributors SD, CS and LDK designed the study and drafted the manuscript. SD and LDK conducted the systematic review. FS evaluated pathological characteristics of PCNSL following CLIPPERS. MB provided evaluation of MRI findings. All authors analysed and interpreted data, critically revised, read and approved the final manuscript. CS and LDK oversaw this study.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.

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