Lung Cancer is the main cause of cancer deaths in both men and women worldwide. Cigarette smoking or even passive exposure to tobacco smoke can be the main cause behind the development of lung cancer. It can be of two types – small cell lung cancers (SCLC) and non- small cell lung cancers (NSCLC). Smoking cessation is the best measure that can be taken to prevent the development of lung cancer. The stage of the lung cancer is determined by measuring the extent to which the cancer has spread in the body. It can be treated with targeted therapy – a combination of surgery, chemotherapy and even radiation therapy.