Community-acquired infections associated with increased risk of lymphoplasmacytic lymphoma/Waldenström macroglobulinaemia

Area of Science:

• Hematology
• Immunology
• Epidemiology

Background:

• Emerging evidence suggests immune stimulation may play a role in lymphoplasmacytic lymphoma/Waldenström Macroglobulinaemia (LPL/WM) development.
• Understanding potential environmental triggers like infections is crucial for LPL/WM research.

Purpose of the Study:

• To investigate the association between common community-acquired infections and the subsequent risk of developing LPL/WM.
• To determine if infections occurring several years prior to diagnosis are linked to LPL/WM risk.

Main Methods:

• Utilized the Surveillance, Epidemiology, and End Results (SEER)-Medicare database for a population-based study.
• Analyzed data from 693 LPL/WM cases and 200,000 controls, examining exposure to 14 common infections.
• Applied statistical analysis, including odds ratios (OR), to assess risk, excluding Medicare claims data from over 6 years prior to diagnosis.

Main Results:

• Significant associations were found between LPL/WM risk and respiratory tract infections: bronchitis (OR 1.56), pharyngitis (OR 1.43), pneumonia (OR 1.42), and sinusitis (OR 1.33).
• Herpes zoster (shingles), a skin infection, was also significantly associated with increased LPL/WM risk (OR 1.51).
• These associations remained significant even after excluding infection data from more than 6 years before LPL/WM diagnosis.

Conclusions:

• Findings suggest a potential role for infections in the pathogenesis of LPL/WM.
• Alternatively, the observed associations may indicate an underlying immune dysregulation present years before LPL/WM diagnosis, reflecting early disease progression.