Lung cancer, also known as lung carcinoma, is the uncontrolled growth of abnormal cells in one or both lungs. It most often occurs in people who smoke. As lung cancer grows, abnormal cells can form tumours and interfere with the functioning of the lung, which provides oxygen to the body via blood.
Stage I: Cancer is confined to lung
Stage II/III: Cancer is confined to chest
Stage IV: Cancer spreads to other organs (lymph nodes, brain, liver, adrenal glands)
Stage I/II : Surgery can be considered
Stage III : Combination of surgery, chemotherapy and radiation therapy may be required
IV : Chemotherapy, oral targeted therapy, immunotherapy and radiation therapy are treatment options