A cancer that begins in the lungs and most often occurs in people who smoke.
Two major types of lung cancer are non-small cell lung cancer and small cell lung cancer. Causes of lung cancer include smoking, second-hand smoke, exposure to certain toxins and family history.
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Answer:
A cancer that begins in the lungs and most often occurs in people who smoke.
Two major types of lung cancer are non-small cell lung cancer and small cell lung cancer. Causes of lung cancer include smoking, second-hand smoke, exposure to certain toxins and family history.