Major Warning Signs of Lung Cancer

Lung cancer is a form of cancer that begins in the lung cells. Adenocarcinoma, non-small cell lung cancer, begins in the glandular cells on the outside of the lung, and small-cell cancer (e.g. small cell carcinoma) starts in the cells lining the bronchi. Lung cancer, while it begins in the lungs, can metastasize, which means it can spread to other parts of the body.