Abstract
Therapeutic improvements are required for primary CNS lymphoma (PCNSL) and secondary CNS lymphoma. PCNSLs are predominantly diffuse large B-cell lymphoma (DLBCL) classified in the non-germinal center (non-GC) subgroup.1 The role of B-cell receptor (BCR) signaling to continuously activate the NF-κB pathway is well-established in non-GC DLBCL.2 Mutations of MYD88 , CD79B , and TBL1XR1 , genes involved in the NF-κB pathway, are frequently encountered in PCNSL.3 Ibrutinib, an inhibitor of BCR signaling, led to an objective response rate of 50% in patients with relapsed or refractory systemic non-GC DLBCL.4 As a small molecule (MW = 440), with promising CNS distribution,5 ibrutinib represents a potential treatment for PCNSL. We report a retrospective case series of patients with relapsed and refractory CNS lymphoma treated with ibrutinib.
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