Lung Cancer Causes

The most common cause of lung cancer is cigarette smoking. However, exposure to other toxins like asbestos can also lead to this cancer. If you developed lung cancer, you might qualify for financial aid and other benefits. Learn about the possible causes of lung cancer and how to get help.

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Top Causes of Lung Cancer

Like all types of cancer, lung cancer can develop when healthy cells mutate and divide at out-of-control rates. There are many issues that can cause lung cancer to form.

Common causes of lung cancer include:
  • Smoking: Cigarette smoking is by far the biggest cause of lung cancer
  • Asbestos exposure: Asbestos fibers can get trapped in the lungs and eventually cause cancer.
  • Radon: Radon is an odorless gas that can harm the lungs if inhaled
  • Secondhand smoke: Even if you didn’t smoke, you still could develop lung cancer through secondhand smoke.
  • Other factors: A family history of lung cancer and exposure to other carcinogens (cancer-causing substances) are just a few other factors that can lead to lung cancer.

Lung cancer can be very dangerous and even life-threatening without proper medical care. Thankfully, there are treatments available no matter what caused your lung cancer. Financial aid might also be available as well.

Get our Free Lung Cancer Guide to learn more about common causes of lung cancer and how to get help after a diagnosis.

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Common Causes of Lung Cancer

Smoking, asbestos, and radon are among the most notable causes of lung cancer. Learn about some of the most common reasons why people develop lung cancer below.

Asbestos Exposure

Asbestos is a naturally occurring group of minerals that is made of very tiny fibers. People can develop lung cancer 10-50 years after they are exposed to asbestos.

When someone is exposed to asbestos, they can inhale tiny fibers that get trapped in the lungs. The fibers can’t be destroyed or removed by the human body, and they irritate lung tissue for decades until genetic mutations set in.

Asbestos exposure is also known to cause other types of cancer, most notably mesothelioma (which often affects the lung lining).

Lung cancer caused by asbestos is very aggressive, but medical care and compensation are available. Learn more: Call (877) 446-5767 now.

Smoking Cigarettes

Most cases of lung cancer are caused by smoking. In fact, over 80% of lung cancer deaths are linked to smoking, according to the American Cancer Society (ACS).

The ACS notes that cigarettes have at least 70 carcinogens in them. These chemicals damage the parts of DNA that prevent cancer and also make it harder for cells to fix DNA damage. Over time, the damage becomes irreparable, and the cells start to multiply at out-of-control rates.

People who are exposed to asbestos and use tobacco are even more likely to develop lung cancer than those who just smoked.

Radon Exposure

Radon is a radioactive gas that has no smell or color. Radon is found everywhere, but it is not dangerous unless it enters homes from cracks in walls, floors, and foundations.

Radon particles can get inhaled into the lungs, causing damage and eventually the formation of cancer tumors.

Did You Know?

Radon is the leading cause of lung cancer among those who don’t smoke, according to the Environmental Protection Agency (EPA). It’s also the biggest cause of lung cancer behind smoking cigarettes.

First floors and basements usually have the highest radon levels since they are closest to the ground. Radon levels are typically higher in homes that are tightly sealed, well-insulated, and built on soil rich in thorium, uranium, and radium.

Exposure to Secondhand Smoke

Secondhand smoke is when you inhale another person’s smoke. The CDC notes there’s no safe amount of secondhand exposure — even being exposed briefly can be harmful.

There are two forms of secondhand smoke:

  • Mainstream smoke is the smoke exhaled by a smoker.
  • Sidestream smoke is smoke from the lighted end of a pipe, cigarette, tobacco burning in a hookah, or cigar. This type of smoke has higher concentrations of cancer-causing agents (carcinogens) and nicotine than mainstream smoke.

Over 7,300 people die from lung cancer caused by secondhand smoke per year, according to the American Lung Association (ALA).

Other Causes of Lung Cancer

The causes of lung cancer listed above are just a few of the many reasons why people get sick. View some of the other possible lung cancer causes and risk factors below.

Smoking Pipes or Cigars

Besides cigarettes, tobacco products like smoking pipes and cigars can also cause lung cancer.

Smoking pipes have many of the same carcinogens as cigarettes. As such, people who smoke pipes are more likely to develop lung cancer, as well as head, neck, and liver cancer, compared to nonsmokers.

“Cigar smoking and pipe smoking are almost as likely to cause lung cancer as cigarette smoking.”

— American Cancer Society

Cigars use fermented and aged tobacco, which contains known carcinogens like nitrites and nitrates. When lit, cigars produce even more carcinogens, including carbon monoxide, nitrosamine, ammonia, and tar.

Were you exposed to toxins like asbestos, cigarettes, or cigars and now have lung cancer? Get our Free Lung Cancer Guide to see how we can help you.

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Family History of Lung Cancer

Family history and genetics may put some people at a greater risk of lung cancer.

For example, Johns Hopkins Medicine notes that someone is two times more likely to develop lung cancer if a family member already had it. The risks increase if someone has been exposed to other possible causes (like cigarette smoke or asbestos).

Further, the ACS notes that someone is more likely to develop lung cancer again if they already had it.

Exposure to Hazardous Chemicals

Exposure to hazardous chemicals like arsenic, asbestos, beryllium, nickel, cadmium, and certain petroleum products may also cause lung cancer by altering a person’s DNA.

Causes of Lung Cancer by Type

There are two main types of lung cancer: non-small cell lung cancer (NSCLC) and small cell lung cancer (SCLC).

Both types of lung cancer can be caused by any of the factors listed above. However, SCLC is most commonly seen in those who smoked, according to the ACS.

Metastatic Lung Cancer Causes

A person has metastatic lung cancer when the cancer spread to other parts of the body. This happens when lung cancer cells separate from a tumor and travel through lymph nodes or blood to other organs and tissues.

Did You Know?

Metastatic lung cancer has the same causes as SCLC and NSCLC. However, no lung cancers are metastatic from the outset. If your doctor diagnoses you with metastatic lung cancer, you’ve had cancer for a long time already.

Metastasis (the process of spreading to other parts of the body) takes a little bit of time. However, you may not have any noticeable lung cancer symptoms until tumors are large enough to affect other tissues and organs.

Find Help for Lung Cancer

Doctor looks at chest X-rayIf you suspect you have lung cancer, reach out to an experienced oncology provider. The right medical professional will use lung cancer screening tests like CT scans, X-rays, and biopsies to determine whether you have lung cancer.

If you have lung cancer, they will match you with suitable treatment options, such as clinical trials, targeted therapy, and cancer care. Further, you may qualify for compensation depending on what caused your lung cancer.

Our team can help you recover compensation for:

  • Basic living expenses such as groceries and rent
  • Health care costs
  • Lost wages
  • Travel expenses if you need to travel for cancer care

Call (877) 446-5767 or request our Free Lung Cancer Guide right now to see how we can assist you.

FAQs About Lung Cancer Causes

Does asbestos cause lung cancer?

Yes. Asbestos exposure has been known to cause lung cancer as well as mesothelioma, an aggressive cancer that can form in the lining of the lungs or other organs.

If you’ve been exposed to asbestos 10-50 years ago and aren’t feeling well, see a doctor immediately. It takes decades for illnesses to form after asbestos exposure, but once they set in, they can progress quickly without treatment.

You may be able to get help from medical professionals and lawyers if you have lung cancer caused by asbestos. Makers of asbestos-based products knew the dangers but did nothing, so it may be possible to hold them financially accountable through legal action.

Secondhand smoke, radon, a family history of lung cancer, and exposure to hazardous materials like asbestos can cause cancer in non-smokers.

This is why it’s important to get screened for lung cancer if you have symptoms. Even if you didn’t smoke, you could be at risk.

Get our Free Lung Cancer Guide to learn more about the causes and potential symptoms of lung cancer and see how we can help.

Lung cancer causes for women are generally the same as for men (smoking, secondhand smoke, and asbestos exposure).

The ACS projects that 3,000 more women will be diagnosed with lung cancer in 2023 than men. However, 7,200 more men are predicted to die from lung cancer than women.

Lung Cancer Group was established by a team of caring advocates so those with lung cancer and other asbestos-related diseases can get the help they deserve. Our site provides the most accurate and up-to-date information about lung cancer, its link to asbestos, and financial compensation available to patients. Contact us to learn more and get assistance.

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  2. American Cancer Society (2023 January 12). “Health Risks of Secondhand Smoke.” Retrieved February 10, 2023 from https://www.cancer.org/healthy/stay-away-from-tobacco/health-risks-of-tobacco/secondhand-smoke.html.

  3. American Cancer Society (2023 January 12). “Lung Cancer Risk Factors.” Retrieved February 10, 2023 from https://www.cancer.org/cancer/lung-cancer/causes-risks-prevention/risk-factors.html.

  4. American Cancer Society (2023 January 12). “Key Statistics for Lung Cancer.” Retrieved February 10, 2023 from https://www.cancer.org/cancer/lung-cancer/about/key-statistics.html.

  5. American Cancer Society (2019 October 1). “What Causes Lung Cancer?” Retrieved February 10, 2023 from https://www.cancer.org/cancer/lung-cancer/causes-risks-prevention/what-causes.html.

  6. American Lung Association (2022 November 17). “Health Effects of Secondhand Smoke.” Retrieved February 10, 2023 from https://www.lung.org/quit-smoking/smoking-facts/health-effects/secondhand-smoke.

  7. Canadian Cancer Society (2023). “Asbestos.” Retrieved February 10, 2023 from https://cancer.ca/en/cancer-information/reduce-your-risk/be-safe-at-work/asbestos.

  8. Cancer Research UK (2021 March 19). “How does smoking cause cancer?” Retrieved February 10, 2023 from https://www.cancerresearchuk.org/about-cancer/causes-of-cancer/smoking-and-cancer/how-does-smoking-cause-cancer.

  9. Centers for Disease Control and Prevention (2022 October 25). “Basic Information About Lung Cancer.” Retrieved February 10, 2023 from https://www.cdc.gov/cancer/lung/basic_info/index.htm.

  10. Centers for Disease Control and Prevention (2022 November 1). “Health Problems Caused by Secondhand Smoke.” Retrieved February 10, 2023 from https://www.cdc.gov/tobacco/secondhand-smoke/health.html.

  11. Centers for Disease Control and Prevention (2022 October 25). “What Are the Symptoms of Lung Cancer?” Retrieved February 10, 2023 from https://www.cdc.gov/cancer/lung/basic_info/symptoms.htm.

  12. Cleveland Clinic (2022 September 28). “Small Cell Lung Cancer.” Retrieved February 10, 2023 from https://my.clevelandclinic.org/health/diseases/6202-small-cell-lung-cancer.

  13. Environmental Protection Agency (2023, January 5). “Health Risk of Radon.” Retrieved February 10, 2023 from https://www.epa.gov/radon/health-risk-radon.

  14. European Respiratory Review (2021). “Lung cancer is also a hereditary disease.” Retrieved February 10, 2023 from https://err.ersjournals.com/content/30/162/210045.

  15. Johns Hopkins Medicine (n.d.). “Lung Cancer Risk Factors.” Retrieved February 10, 2023 from https://www.hopkinsmedicine.org/health/conditions-and-diseases/lung-cancer/lung-cancer-risk-factors.

  16. Memorial Sloan Kettering Cancer Center (2019, November 11). “5 Myths about Radon and Lung Cancer.” Retrieved February 10, 2023 from https://www.mskcc.org/news/5-myths-about-radon-and-lung.

  17. National Cancer Institute (2022 December 16). “Non-Small Cell Lung Cancer Treatment (PDQ®)–Health Professional Version.” Retrieved February 10, 2023 from https://www.cancer.gov/types/lung/hp/non-small-cell-lung-treatment-pdq.

  18. National Cancer Institute (2011 December 6). “Radon and Cancer.” Retrieved February 10, 2023 from https://www.cancer.gov/about-cancer/causes-prevention/risk/substances/radon/radon-fact-sheet.

  19. National Library of Medicine: PubMed Central. American Thoracic Society (2010 February). “Asbestos, Lung Cancers, and Mesotheliomas.” Retrieved February 10, 2023 from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2822975/.

  20. OncoLink (2022 May 3). “Cigar and Pipe Smoking and Cancer Risk.” Retrieved February 10, 2023 from https://www.oncolink.org/risk-and-prevention/smoking-tobacco-and-cancer/cigar-and-pipe-smoking.

  21. Penn Medicine (2021 October 7). “What Women Need to Know About Lung Cancer.” Retrieved February 10, 2023 from https://www.pennmedicine.org/cancer/about/focus-on-cancer/2021/october/lung-cancer-what-women-should-know.

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