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Lung cancer is the second most common cancer in the U.S. in both men and women. In addition to smoking, many factors can contribute to lung cancer, including exposure to carcinogens, second hand Preventing Chronic Disease: April 2007: 06_0024 Lung Cancer: Why You Should Get Screened in Delaware The harmful chemicals in smoking directly damage lung cells, causing DNA mutations that increase cancer risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking Gastric Cancer and Smoking What Are the Shocking Real Risks? OncoDaily

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