Abstract
The Marginal Zone Lymphoma International Prognostic Index (MALT-IPI) was recently developed for use in patients with mucosa-associated lymphoid tissue (MALT) lymphoma based on age, serum lactate dehydrogenase level, and Ann Arbor stage. In this study, we aimed to validate the MALT-IPI. A total of 455 MALT lymphoma patients were included in this study from between January 2005 and February 2017. Event-free survival (EFS), progression-free survival (PFS), cause-specific survival (CSS), and overall survival (OS) were the primary outcomes. Of the 455 patients, MALT-IPI low-, intermediate-, and high-risk groups included 309 (67.9%), 126 (27.7%), and 20 (4.4%) individuals, respectively. When comparing the low-risk group (L MALT-IPI) with the intermediate–high-risk group (I-H MALT-IPI), EFS, PFS, CSS, and OS were significantly different (p = 0.000, p = 0.000, p = 0.027, and p = 0.037). The International Prognostic Index and the Follicular Lymphoma International Prognostic Index failed to predict the prognosis of MALT lymphoma. Use of the MALT-IPI significantly differentiated L MALT-IPI from I-H MALT-IPI with respect to EFS, PFS, CSS, and OS. MALT-IPI is a valuable tool for the prediction of MALT lymphoma prognosis.
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This study was approved by the institutional review board (IRB) of Samsung Medical Center in Seoul, Korea (IRB number 2018-02-076).
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Hong, J., Cho, J., Ko, Y.H. et al. Validation of the Marginal Zone Lymphoma International Prognostic Index. Ann Hematol 98, 457–464 (2019). https://doi.org/10.1007/s00277-018-3516-1
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DOI: https://doi.org/10.1007/s00277-018-3516-1