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Page Updated: February 06, 2022

Risk Factors for Mesothelioma

Dave Foster Page Edited by Patient Advocate Dave Foster

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Fact Checked

This page has been fact checked by an experienced mesothelioma Patient Advocate. Sources of information are listed at the bottom of the article.

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We make every attempt to keep our information accurate and up-to-date.

Please Contact Us with any questions or comments.

Risk factors for mesothelioma are numerous, but the leading factor is asbestos exposure. Older men who worked in industries with asbestos have the highest risk of receiving a mesothelioma diagnosis. Other factors that may contribute to the development of this cancer are exposure to other minerals and genetic factors.

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Causes and Risk Factors

When discussing risk factors for a disease like mesothelioma, it is important to understand the difference between risk factors and causes:

  • A risk factor can be used to determine which populations are more likely to develop mesothelioma.
  • Each risk factor may or may not be a contributing cause.

For example, being a man is not a cause of mesothelioma, but men are more likely to develop the disease. Being male is a risk factor for the disease.

Asbestos exposure, on the other hand, is a risk factor but may also be a cause. Tiny asbestos particles in the airways can actually cause later tumor growth.

Asbestos Exposure Is the Leading Risk Factor for Mesothelioma

Asbestos exposure is the leading risk factor for mesothelioma.[1] More than any other population, regardless of factors like age and gender, people exposed to asbestos are more likely to develop mesothelioma.

Asbestos is also considered a likely cause, but pinpointing the cause of any type of cancer is difficult. Once inhaled, asbestos fibers can lodge in tissues and cause damage, resulting in mesothelioma tumors.

The risk of developing mesothelioma increases when exposed to asbestos early, in large amounts, or prolonged periods. Although asbestos is a leading risk factor, it cannot be considered a definite cause, and it may not be the only factor.

Not all people who have mesothelioma encountered asbestos.[1] Regardless of how strong the connection between asbestos and mesothelioma is, there are other contributing factors.

Age, Gender, and Occupation

Other important risk factors for mesothelioma are likely related to asbestos. Being older, male, and working in certain occupations are all risk factors.

Older men are most often diagnosed with mesothelioma, probably because men more commonly work in industries that used asbestos. Age is a factor because mesothelioma takes decades to develop.[1]

Jobs and workplaces that put people at risk for mesothelioma include:

  • Mining
  • Factories
  • Construction
  • Shipbuilding
  • Ship repair
  • Automotive repair
  • Navy careers

Asbestos was used in many aspects of construction, including insulation, roofing, flooring, plumbing, electricity, and many other applications. People who worked in construction with these materials or in factories that manufactured them risked developing mesothelioma.

Also at risk are people who lived with these workers, as they could transport asbestos fibers on their clothes and skin, resulting in family exposure.

Smoking and General Health with Asbestos Exposure

Mesothelioma is not guaranteed to develop after asbestos exposure; however, other risk factors may increase the odds of developing the cancer. Smoking is a significant factor because it is also carcinogenic.

Smoking alone is a significant risk factor for lung cancer. For those exposed to asbestos, smoking increases the risk of developing this disease. Other health factors may also contribute, such as being overweight, not exercising, or eating a poor diet.

Other Minerals May Contribute to Mesothelioma

Another group of minerals, called zeolites, have been implicated in mesothelioma. Epidemiological studies of people in a certain region of Turkey have found high rates of mesothelioma, yet no asbestos exposure.

What is abundant in the region are zeolites, including one type of zeolite called erionite.[1] Studies have found that laboratory animals exposed intentionally to the fibers of these minerals develop mesothelioma.[2]

The SV40 Virus

A controversial potential risk factor for mesothelioma is a virus called SV40. This virus, found naturally in monkeys, also contaminated a significant proportion of polio vaccines in the 1950s and 1960s.

Thousands of people were exposed to the virus through this vaccine, and there is some research evidence that it could contribute to mesothelioma.[1]

While some experts and most government health officials deny SV40 is a risk factor for mesothelioma, the evidence is compelling.

Many studies have found that the virus is present in tumor samples of patients with mesothelioma. How it may contribute to cancer formation is not understood, but it may be an important risk factor.

Genetic Factors

Finally, a genetic component may explain why some people develop mesothelioma without ever encountering asbestos. There may be certain genes that increase the risk of developing mesothelioma.

One recently discovered gene was named BAP1. A study of two families with a long history of mesothelioma and other cancers found that these individuals had a mutation in the BAP1 gene. The research also indicates people with this mutation, who are also exposed to asbestos, are at an even greater risk.[3]

Other gene mutations, including those in CDKN2A and NF2, have been implicated as risk factors for mesothelioma. These, along with BAP1, may play a role in cancer formation because they are tumor suppressor genes. A mutation interferes with the ability of the body to suppress or prevent tumor growth.[3]

Risk factors are like guidelines. They are not causes of mesothelioma and cannot guarantee a person will develop the disease. They simply tell us that certain populations have an increased chance of developing the disease.

This is important because it leads to better regulations and advocacy for at-risk people. It is also important because it provides awareness for those with these risk factors. If you have risk factors for mesothelioma, be proactive and receive regular screening to increase the odds of early detection.

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Page Edited by Patient Advocate Dave Foster

Dave Foster

Dave has been a mesothelioma Patient Advocate for over 10 years. He consistently attends all major national and international mesothelioma meetings. In doing so, he is able to stay on top of the latest treatments, clinical trials, and research results. He also personally meets with mesothelioma patients and their families and connects them with the best medical specialists and legal representatives available.

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References
  1. American Cancer Society. (2018, November 16). Risk Factors for Malignant Mesothelioma.
    Retrieved from: https://www.cancer.org/cancer/malignantmesothelioma/detailedguide/malignant-mesothelioma-risk-factors
  2. Wagner, J.C., Skidmore, J.W., Hill, R.J., and Griffiths, D.M. (1985, May). Erionite Exposure and Mesothelioma in Rats. Br. J. Cancer. 51(5), 727-30.
    Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1977068/
  3. Hylebos, M., Van Camp, G., van Meerbeeck, J.P., and Op de Beeck, K. (2016, October). The Genetic Landscape of Malignant Pleural Mesothelioma: Results From Massively Parallel Sequencing. J. Thorac. Oncol. 11(10), 1615-26.
    Retrieved from: https://www.ncbi.nlm.nih.gov/pubmed/27282309
View All References

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