Levine, P H, Fears, T R, Cummings, P et al. · Annals of epidemiology · 1998 · DOI
Researchers compared cancer rates in two areas of Nevada where an unexplained fatiguing illness (including ME/CFS cases) occurred in the 1980s against an area with no reported illness. They found higher rates of non-Hodgkin lymphoma and brain tumors in the affected areas, but similar rates of breast and lung cancer. The authors suggest this could mean ME/CFS might increase cancer risk, but they emphasize it's too early to draw firm conclusions.
This study raises an important question about whether ME/CFS may predispose patients to certain malignancies, which could have significant health implications for disease management and surveillance. It provides an early methodological framework for investigating potential links between ME/CFS and cancer using population-level data.
This study does not prove that ME/CFS causes cancer or that ME/CFS patients have higher cancer risk—it is an ecological study comparing geographic areas, not individuals with confirmed diagnoses. Correlation at the population level does not establish causation, and the authors explicitly state it is 'premature to accept such a link at this time.' Alternative explanations (environmental exposures, demographic differences, surveillance bias) were not ruled out.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
Spotted an error in this entry? Report it →