Abstract
Optimal treatments for multiple myeloma (MM) patients with high-risk cytogenetics must be determined, but subgroup features are not well-defined. We used real-world data from the Korean Myeloma Registry (KMR) to analyze the characteristics and clinical outcomes of newly diagnosed MM patients with ≥ 1 high-risk cytogenetic abnormality: Group 1: t(4;14) or t(14;16); Group 2: del(17p); Group 3: t(4;14)/del(17p) or t(14;16)/del(17p). Overall, 347 high-risk patients were identified (males, 48.7%; median age, 63 years). Median progression-free survival (PFS) and overall survival (OS) were 19.0 months (95% CI 17.0–20.0) and 50.0 months (95% CI 37.0–61.0), respectively. PFS (p = 0.047) and OS (p = 0.020) differed significantly between groups. After stratification by transplant eligibility, PFS and OS were significantly poorer in Group 3 among transplant-eligible patients, and even poorer in those with gain(1q). Patients stratified by cytogenetic abnormality and revised International Staging System (R-ISS) had significantly different PFS (p < 0.001) and OS (p = 0.003), with the worst survival in R-ISS III/Group 3 (median OS 21.0 months). Higher number of high-risk cytogenetic abnormalities was a negative prognostic marker for PFS and OS (p < 0.001). Real-world KMR data showed that risk factors for poor prognosis of MM patients included del(17p), R-ISS stage, and number of cytogenetic abnormalities.
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Acknowledgements
Under the direction of the authors, medical writing assistance was provided by Robert A. Furlong PhD and David P. Figgitt PhD, ISMPP CMPP™, Content Ed Net, with funding from Amgen Korea.
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This study was funded by Amgen Korea.
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KK conceived and designed the analysis, contributed to data collection, and wrote the paper. JSK, S-SY, DHY, H-SE, J-JL and C-KM contributed to data collection and reviewing the manuscript. HWY and MP contributed to analyzing the data, writing the statistical analysis, and reviewing the manuscript. HL performed the statistical analysis and wrote the paper. Patient information was provided by various investigators at KMMWP. All authors were involved in the preparation of the manuscript and approved the final version of the manuscript.
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Kihyun Kim, Jin Seok Kim, Sung-Soo Yoon, Dok Hyun Yoon, Hyeon-Seok Eom, Je-Jung Lee, Hyeon Woo Yim, Misun Park and Chang-Ki Min report consultancy and research funding from Amgen Korea. Hojoon Lee reports employment by Amgen Korea.
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This study was approved by the Institutional Review Board (IRB) of Samsung Medical Center (IRB no. SMC2018-08-058-001), the Catholic University of Korea (IRB no. KC18RODI0556), Severance Hospital (IRB no. 4-2018-0633), Seoul National University Hospital (IRB no. H-1810-111-982), Asan Medical Center (IRB no. 2019-0788), National Cancer Center of Korea (IRB no. NCC2019-0105), and Chonnam National University Hwasun Hospital (IRB no. CNUHH-2019-092).
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Kim, K., Kim, J.S., Yoon, SS. et al. Characteristics and clinical outcome of high-risk multiple myeloma patients in Korea (KMM 1805). Int J Hematol 116, 110–121 (2022). https://doi.org/10.1007/s12185-022-03332-w
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DOI: https://doi.org/10.1007/s12185-022-03332-w