Mantle Cell Lymphoma: Evolving Frontline Treatment Strategies
DOI:
https://doi.org/10.58931/cht.2024.3251Abstract
Mantle cell lymphoma (MCL) is a mature B-cell non-Hodgkin lymphoma (NHL) that accounts for 3-10% of new NHL cases in Canada. The clinical course of MCL is heterogeneous, ranging from indolent behavior that does not require therapy for years, to highly aggressive disease with limited prognosis. As such, the 2022 International Consensus Classification (ICC) and World Health Organization (WHO) classifications subdivide MCL into two categories: 1) indolent MCL, which is characterized by blood involvement, splenomegaly without nodal involvement, or low-burden nodal involvement (mutated immunoglobulin heavy chain [IGHV], SOX11 negative, low Ki67 proliferative index); and 2) aggressive MCL, which is characterized by pleomorphic and blastoid morphologic appearance, TP53 aberrancy, high Ki67, and unmutated IGHV.
While traditionally, patients with MCL had a median overall survival (OS) of only 3 to 5 years, there has been significant improvement over the last two decades, owing to chemoimmunotherapy with rituximab, cytarabine-based induction regimens, addition of consolidative autologous stem cell transplant (ASCT), rituximab maintenance, and the advent of novel targeted therapies (including Bruton kinase inhibitors [BTKi], venetoclax, and lenalidomide) in the relapsed setting. Despite these advances, MCL remains incurable even with aggressive therapy, and most patients will invariably relapse. As such, prospective studies integrating novel therapies with either a chemotherapy backbone or evaluating chemotherapy-free regimens are ongoing, aiming to improve outcomes and reduce toxicities. This review summarizes the current understanding of disease prognostication, treatment options, and novel therapeutic strategies that will reshape the treatment paradigm of MCL in the near future.
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