Lung cancer arises in tissues of the lung, usually in the cells lining air passages. The two main types are small-cell lung cancer and non-small-cell lung cancer, according to the shape of cells ...

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 ...