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Lung cancer is the most common form of cancer found in the United States. While tobacco smoking remains the primary cause of the disease, anyone can develop lung cancer – even people who have never smoked.
Your lungs are a pair of large organs in your chest. They are part of your respiratory system. Air enters your body through your nose or mouth. It passes through your windpipe (trachea), then through each bronchus before going into your lungs.
Cancer begins in cells, the building blocks that make up tissues. Tissues make up the...