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Perspectives on Sensation and Perception
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[Waldenström macroglobulinemia: Japanese perception].
1Division of Hematology, National Hospital Organization Disaster Medical Center.
[Rinsho Ketsueki] the Japanese Journal of Clinical Hematology
|September 6, 2019
Summary
Waldenström macroglobulinemia (WM) is a rare lymphoma. In Japan, 6q deletion is linked to higher IgM levels and aggressive disease, suggesting altered B-cell signaling pathways. Further research is needed for optimal treatment strategies.
Area of Science:
- Hematology
- Oncology
- Genetics
Background:
- Waldenström macroglobulinemia (WM) is a rare, indolent B-cell lymphoma.
- This report specifically examines WM epidemiology and characteristics within Japan.
- Lymphoplasmacytic lymphoma (LPL) is often studied alongside WM.
Purpose of the Study:
- To analyze the epidemiology of WM in Japan.
- To investigate the prognostic significance of 6q deletion in WM patients.
- To explore potential molecular mechanisms underlying aggressive WM with 6q deletion.
Main Methods:
- Analysis of 2016 registry data from the Japanese Society of Hematology.
- Comparison of WM cases with and without 6q deletion.
- Assessment of serum IgM levels and B-cell receptor signaling pathway activation.
Main Results:
- WM/LPL incidence in Japan is 2.8 per million, comprising 1.97% of mature lymphoid malignancies.
- 6q deletion is the primary genetic aberration and a poor prognostic factor in WM.
- WM with 6q deletion showed higher serum IgM and activated B-cell receptor signaling and IL-21 receptor expression, suggesting increased aggressiveness.
Conclusions:
- 6q deletion is a significant factor associated with aggressive Waldenström macroglobulinemia in Japan.
- Activated signaling pathways may contribute to the clinical aggressiveness observed in WM with 6q deletion.
- Optimal treatment algorithms for WM in Japan require further investigation, despite current trends in rituximab and alkylating agent use.
Keywords:
Annual incidenceB-cell receptor signaling pathwayChromosome 6q deletionWaldenström macroglobuminemiaMore Related Videos
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