This is a single arm, multicenter, phase 2 study designed to evaluate the efficacy and safety of Orelabrutinib, rituximab and methotrexate as first-line regimens in the treatment of newly primary central nervous system lymphoma. A total of 28 patients plan to participate in this study to receive a total 6 cycles of induction chemotherapy followed by Orelabrutinib maintenance chemotherapy up to one year. After 6 cycles of induction chemotherapy, autologous Hematopoietic Stem Cell Transplantation (AHSCT) will be performed for transplantation eligible patients . Follow-ups should be taken up to the first 2 years. The primary endpoint is objective response rate (ORR) and secondary endpoint includes Progression free survival (PFS), overall survival (OS), and adverse events.
It is a single arm, multicenter, phase 2 study to explore the efficacy and safety study of OR-MTX chemotherapy（Orelabrutinib, Rituximab and Methotrexate）as first-line regimens in the treatment of newly diagnosed primary central nervous system lymphoma. Objective response rate is the primary endpoint.