Central nervous system posttransplant lymphoproliferative disorder following allogeneic hematopoietic stem cell transplantation successfully treated with combination therapy of acalabrutinib and immunochemotherapy: A case report and literature review

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Here, we report a case of Epstein-Barr virus-positive central nervous system-post-transplant lymphoproliferative disorder (CNS-PTLD) patient who failed to achieve complete metabolic remission (CMR) after successively trying a methotrexate-based regimen combined with orelabrutinib or whole-brain radiotherapy and encountered intracranial hemorrhage during orelabrutinib treatment. Ultimately, the patient achieved CMR after one cycle of acalabrutinib in combination with temozolomide, teniposide, liposomal doxorubicin, dexamethasone, and rituximab (TEDDi-R). Following another cycle of TEDDi-R treatment, he has been receiving acalabrutinib maintenance up to now and remained in CMR. The case may provide an effective treatment option for CNS-PTLD patients in clinical practice.

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