Lung Cancer Lung cancer starts in the cells of the lung. Cancerous (malignant) tumor is a group of cancer cells that can invade and destroy nearby tissue. It can also spread (metastasize) to other parts of the body. When cancer starts in the cells of the lung, it is called primary lung cancer. The lung … Continue reading Lung Cancer | Symptoms, Stages, Types, Diagnoses, Chances of Surviving, Treatments