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Risk Factors for Multiple Myeloma

A risk factor is anything that changes a person¡¯s chance of getting a disease such as cancer. Different cancers have different risk factors. For example, exposing skin to strong sunlight is a risk factor for skin cancer. Smoking is a risk factor for lung cancer and many other cancers. But risk factors don¡¯t tell us everything. People who have no risk factors can still get the disease. Also, having a risk factor, or even several, does not mean that a person will get the disease.

Here are a few risk factors that could affect someone¡¯s chance of getting multiple myeloma.

Age

The risk of developing multiple myeloma goes up as people get older. Less than 1% of cases are diagnosed in people younger than 35. Most people diagnosed with this cancer are at least 65 years old.

Sex

Men are slightly more likely to develop multiple myeloma than women.

Race

Multiple myeloma is more than twice as common in African ÃÛÌÒ´«Ã½s than in White ÃÛÌÒ´«Ã½s. The reason is not known.

Family history

Multiple myeloma seems to run in some families. Someone who has a sibling or parent with myeloma is more likely to get it than someone who does not have this family history. Still, most patients have no affected relatives, so this accounts for only a small number of cases.

Excess body weight

Some research has suggested that having excess body weight increases a person¡¯s risk of developing myeloma.

Having other plasma cell diseases

People with monoclonal gammopathy of undetermined significance (MGUS) or solitary plasmacytoma are at higher risk of developing multiple myeloma than someone who does not have these diseases.

The ÃÛÌÒ´«Ã½ Cancer Society medical and editorial content team

Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as editors and translators with extensive experience in medical writing.

Alexander DD, Mink PJ, Adami HO, et al. Multiple myeloma: a review of the epidemiologic literature. Int J Cancer. 2007;120 Suppl 12:40-61.

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Marshall A. Lichtman. Obesity and the Risk for a Hematological Malignancy: Leukemia, Lymphoma, or Myeloma. Oncologist. 2010 Oct; 15(10): 1083¨C1101.

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Rajkumar SV, Dispenzieri A. Multiple myeloma and related disorders. In: Niederhuber JE, Armitage JO, Doroshow JH, Kastan MB, Tepper JE. ´¡²ú±ð±ô´Ç´Ú´Ú¡¯²õ Clinical Oncology. 5th edition. Philadelphia, PA. Elsevier: 2014:1991-2017.

VanValkenburg ME, Pruitt GI, Brill IK, et al. Family history of hematologic malignancies and risk of multiple myeloma: differences by race and clinical features. Cancer Causes Control. 2016 Jan;27(1):81-91.

Last Revised: January 19, 2024

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