March 17, 2026 · Blood · DOI: 10.1182/blood.2025031869

Immunodeficiency-associated primary CNS lymphomas: An International Primary CNS Lymphoma Collaborative Group (IPCG) Study

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The authors aimed to characterize the clinicopathological features and prognostic factors of immunodeficiency-associated primary CNS lymphoma (ID-PCNSL) through an international retrospective study involving 308 cases. They found that immune reconstitution and rituximab-methotrexate-based chemotherapy improved response rates and survival, while age, Karnofsky Performance Status, and EBV positivity were identified as significant prognostic factors. Additionally, they developed a prognostic score to better stratify patients based on these variables, enhancing management strategies for ID-PCNSL.

Leon D Kaulen, Lakshmi Nayak, Philipp Karschnia, Imke Kraai, Daniela Raffaela Galluzzo, Fleur A de Groot, Matthew Witterholt, Laura Donovan, Sita Bhella, Luis P Kuschel, Christopher P Fox, Sabine Seidel, James Paterson, Benjamin Richter, Karan S Dixit, Thomas Zeyen, Juan Pablo Alderuccio, Silvia Montoto, Outi Kuittinen, Benjamin-Leon Traub, Sofia Doubrovinskaia, Hannah Rohdjess, Katharina Mueller, Roelien Enting, Jeroen de Bresser, Hanne Kuitunen, Fabio M Iwamoto, Alvaro J Alencar, Ulrich Herrlinger, Michael Platten, Kate Cwynarski, Joe S Mendez, Patrick Roth, Louisa von Baumgarten, Anca Prica, Govind Bhagat, Kathryn Lurain, David Schiff, Joost Sp Vermaat, Joachim Baehring, Marcel Nijland, Jörg Dietrich, Tracy T Batchelor, Wolfgang Wick

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