What question did this study set out to answer?

The aim is to evaluate the prognostic significance of PD-1 and PD-L1 expression in CNS large B-cell lymphomas.

Prognostic Significance of PD-1 in Large B-Cell Lymphomas of the CNS

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This analysis reveals PD-1 expression predicts treatment response in CNS lymphomas, suggesting important therapeutic implications.

The aim is to evaluate the prognostic significance of PD-1 and PD-L1 expression in CNS large B-cell lymphomas.
Conducted immunohistochemical studies on 36 CNS lymphoma samples
Evaluated PD-1 and PD-L1 expression rates
Stratified clinical groups by therapy response and PD-1/PD-L1 expression
Performed survival analyses using Kaplan-Meier and Cox proportional hazards models
67% positivity for PD-1 and 75% for PD-L1 in tumors
PD-1 positivity linked to shorter overall survival in PCNSL
Longer progression-free survival observed in PD-1 positive PCNSL patients compared to SCNSL
Faster time to response noted in PD-1 positive patients; PD-L1 did not correlate with survival outcomes

Santagostino et al. (2026) studied this question.

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