Lung cancer is a serious health concern worldwide, often associated with smoking. However, it’s crucial to understand that non-smokers can also be at risk. In fact, if lung cancer in non-smokers had its own separate category, it would rank among the top 10 fatal cancers globally. This post aims to shed light on the top seven causes of lung cancer in non-smokers, providing valuable insights into each cause and offering practical tips to reduce exposure and risk.
The Misconception Of Smoking And Lung Cancer
It’s a common misconception that only smokers get lung cancer. While it’s true that smoking significantly increases the risk, it’s not the only cause. According to the American Cancer Society, as many as 20% of people who die from lung cancer in the United States every year have never smoked or used any other form of tobacco. This translates to about 30,000 Americans annually.
The misconception that lung cancer is solely a smoker’s disease can lead to late diagnosis in non-smokers, as the symptoms may not be taken seriously. This underscores the importance of understanding and recognizing the other risk factors associated with lung cancer in non-smokers. Awareness can lead to earlier detection, significantly improving prognosis and survival rates. In the following sections, the top seven causes of lung cancer in non-smokers will be discussed.
Radon Exposure
Radon is a naturally occurring radioactive gas you can’t see, smell, or taste. It’s produced by the decay of uranium in soil and rocks and can seep into homes and buildings through cracks in the foundation. The Surgeon General has warned that radon is the second leading cause of lung cancer in the United States, contributing to an estimated 20,000 lung cancer deaths each year.
Long-term radon exposure can lead to lung cancer, especially in non-smokers. When inhaled, radon particles can damage the cells lining the lungs, leading to cancer over time. The risk is even higher for smokers exposed to radon. To reduce radon exposure, it’s recommended to test homes for radon levels and to use radon-reduction systems if necessary.
Secondhand Smoke
Secondhand smoke, also known as environmental tobacco smoke, is another significant cause of lung cancer in non-smokers. It’s a mixture of the smoke given off by the burning end of a cigarette, pipe, or cigar and the smoke exhaled by smokers. The U.S. Environmental Protection Agency (EPA) has classified secondhand smoke as a known human carcinogen (cancer-causing agent).
Exposure to secondhand smoke carries many of the same risks as direct smoking. It contains over 7,000 chemicals, including at least 70 known to cause cancer. Non-smokers who live with a smoker have a 20-30% higher risk of developing lung cancer. To avoid secondhand smoke, it’s important to create smoke-free environments at home and seek out smoke-free public spaces.
Air Pollution
Air pollution, both indoor and outdoor, is a significant contributor to lung cancer in non-smokers. Outdoor air pollution includes a mix of pollutants such as particulate matter, nitrogen dioxide, and polycyclic aromatic hydrocarbons, which are all linked to lung cancer. In fact, the International Agency for Research on Cancer (IARC) has classified outdoor air pollution and particulate matter as carcinogenic to humans.
Indoor air pollution can also pose a risk. This can come from sources like burning coal or wood for cooking and heating or from certain building materials. In some parts of the world, indoor air pollution is a major health concern and a significant cause of lung cancer. To reduce exposure to air pollution, individuals can monitor local air quality reports, limit time spent outside on high-pollution days, and ensure good ventilation indoors.
My husband is 93 years old and now has been diagnosed with Metoshellioma cancer. He was exposed to asbestos in his 20s. What a shock after all these years. He was an electrician. Everything was asbestos, ceilings, insulation etc. back then.