Why are men more likely to develop multiple myeloma than women?

Rates of multiple myeloma (MM), the second most common blood cancer in the United States, are increasing and are twice as high in men than in women. A new study published by Wiley online in CANCER, a peer-reviewed journal of the American Cancer Society, provides insights that may help to explain this disparity.

To investigate the sex difference in MM, researchers analyzed data on 850 patients with newly diagnosed MM enrolled in the Integrative Molecular And Genetic Epidemiology (IMAGE) study at the University of Alabama at Birmingham.

Compared with female patients, male patients were more likely to have advanced (International Staging System stage III) disease at the time of diagnosis. Males were also more likely to have high myeloma load—serum monoclonal protein (an abnormal protein produced by cancerous blood cells), more organ failure (especially kidney failure), and bone damage. Men were less likely than women to have low bone mineral density, and myeloma-defining features tended to differ between the two sexes. These differences were apparent even after taking numerous factors into account—including race, age, body mass index, education, income, smoking, and alcohol use.

Analyses suggested that certain chromosomal abnormalities that lead to initiation of myeloma occurring more often in younger males may help to explain some of the differences seen in this study.

“This research suggests that sex-specific mechanisms promote multiple myeloma pathogenesis, which may account for the excess risk seen in men,” said lead author Krystle L. Ong, PhD, of the O’Neal Comprehensive Cancer Center at the University of Alabama at Birmingham. “These findings may be used to improve risk stratification, diagnosis, and tailored treatments for both men and women with newly diagnosed multiple myeloma or related early precursor conditions.”

Additional information

Full Citation:
“Sex differences in the clinical presentation of patients with newly diagnosed multiple myeloma.” Krystle L. Ong, Kevin D. Arnold, Meredith C. Wessel, Gayatri Ravi, Faith E. Davies, Gareth J. Morgan, and Elizabeth E. Brown. CANCER; Published Online: January 12, 2026 (DOI: 10.1002/cncr.70192).
URL Upon Publication: https://doi.wiley.com/10.1002/cncr.70192

About the Journal    
CANCER is a peer-reviewed publication of the American Cancer Society integrating scientific information from worldwide sources for all oncologic specialties. The objective of CANCER is to provide an interdisciplinary forum for the exchange of information among oncologic disciplines concerned with the etiology, course, and treatment of human cancer. CANCER is published on behalf of the American Cancer Society by Wiley and can be accessed online. Follow CANCER on X @JournalCancer and Instagram @ACSJournalCancer, and stay up to date with the American Cancer Society Journals on LinkedIn and YouTube.

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