Lung Cancer in Non-Smokers: Rising Risks Beyond Smoking
Though often linked to smoking, lung cancer is increasingly affecting non-smokers. In 2017, over 2 million global cases were reported, with 10–20% occurring in those who never smoked. Adenocarcinoma is the most common type, especially in women.
Key Risk Factors:
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Air Pollution: High levels of PM2.5 and PM10, especially in East Asia and North Africa, are linked to increased risk.
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Radon Gas: Accumulates in poorly ventilated homes, raising cancer risk.
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Genetics: Mutations in genes like EGFR and ALK can cause lung cancer without tobacco exposure.
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Lifestyle: Poor diet, obesity, and inactivity may contribute via chronic inflammation.
Early Detection:
Low-dose CT scans help catch cancer early but are underused in non-smokers. Updated screening guidelines are needed to reflect new risk profiles.
