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Primary Plasma Cell Leukemia: Recent Advances in Molecular Understanding and Treatment Approaches
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Primary Plasma Cell Leukemia: Recent Advances in Molecular Understanding and Treatment Approaches
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Journal Article
Primary Plasma Cell Leukemia: Recent Advances in Molecular Understanding and Treatment Approaches
2025
Overview
Primary plasma cell leukemia (pPCL) is a rare and aggressive plasma cell dyscrasia. According to revised diagnostic criteria, pPCL is defined by the presence of ≥5% circulating plasma cells (CPCs) in the peripheral blood of patients with newly diagnosed multiple myeloma (NDMM). pPCL is characterized by a distinct cytogenetic profile, including frequent t(11;14), MAF/MAB translocations, 1q gain, and del(17p). While t(11;14) is generally associated with a favorable prognosis, the coexistence of multiple high-risk cytogenetic abnormalities is linked to poorer outcomes. Tandem autologous hematopoietic stem cell transplantation and novel anti-myeloma agents have improved survival in some patients; however, overall prognosis remains poor, particularly in those ineligible for transplantation. Venetoclax and emerging immunotherapies, such as CAR-T cells and bispecific antibodies, show promise and merit clinical trials focused on pPCL-enriched cohorts. Additionally, recent findings associating even minimal CPCs with adverse outcomes in NDMM support broader inclusion criteria in future trials. A deeper understanding of pPCL’s molecular pathology is critical for the development of effective targeted therapies. This article reviews recent advances in the molecular understanding of and treatment strategies for pPCL.
Publisher
MDPI AG
