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Respiratory tract infections in the pathway to multiple myeloma: a population-based study in Scandinavia

Ola Landgren1, Joshua S Rapkin, Lene Mellemkjaer

  • 1Genetic Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health & Human Services, Bethesda, MD 20892-7236, USA. landgreo@mail.nih.gov

Haematologica
|December 6, 2006
PubMed

Insights

A history of pneumonia may increase the risk of developing multiple myeloma (MM). This risk appears highest within five years of a pneumonia diagnosis, suggesting infections could be a trigger for MM.

Area of Science:

  • Hematology
  • Oncology
  • Infectious Disease Epidemiology

Background:

  • Infectious antigens are hypothesized to drive progression from monoclonal gammopathy of undetermined significance (MGUS) to multiple myeloma (MM).
  • Understanding environmental risk factors for MM is crucial for early detection and prevention strategies.

Purpose of the Study:

  • To investigate the association between a history of respiratory tract infections and the risk of developing multiple myeloma (MM).

Main Methods:

  • Population-based case-control study in Denmark (1977-1997).
  • Inclusion of MM patients (n=4,476) and matched controls (n=16,727).
  • Analysis of inpatient and outpatient diagnoses for respiratory infections preceding MM diagnosis.

Main Results:

  • A personal history of pneumonia was linked to a 1.6-fold increased risk of MM.
  • The elevated risk was most pronounced for pneumonia occurring 1-4.99 years before MM diagnosis (OR=1.7).
  • Recurrent pneumonia (two or more episodes) showed a sustained, though not statistically significant, increased risk of MM.

Conclusions:

  • Pneumonia may act as a trigger for multiple myeloma development.
  • Immune disturbances in late-stage MGUS could manifest as respiratory infections, potentially preceding MM diagnosis.

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