1. INTRODUCTIONLung CancerLung cancer is also called lung carcinoma, is a threatening lung tumor characterized by uncontrolled cell development in tissues of the lung. This development can spread past the lung by the cycle of metastasis into close by tissue or different parts of the body. Most cancers that start in the lung, known as primary lung cancers, are carcinomas [1]. The two primary sorts are small-cell lung carcinoma (SCLC) and non-small-cell lung carcinoma (NSCLC). The most well-known manifestations are cough (coughing up blood), weight reduction, windedness, and chest pain.By far most (85%) of instances of lung cancer are because of long-haul tobacco smoking. Around 10–15% of cases happen in individuals who have never smoked [2]. These cases are regularly brought about by a mix of genetic factors and introduction to radon gas, asbestos, recycled smoking, or different types of air contamination Lung cancer might be seen on chest radiographs and computed tomography (CT) scans. The conclusion is affirmed by biopsy which is generally performed by bronchoscopy or CT-direction [3].Shirking of danger factors, including smoking and air contamination, is the essential technique for avoidance. Therapy and long haul results rely upon the kind of cancer, the stage (level of spread), and the individual’s general wellbeing. Most cases are not reparable. Normal medicines incorporate medical procedures, chemotherapy, and radiotherapy. NSCLC is here and there treated with surgery, while SCLC typically reacts better to chemotherapy and radiotherapy [4].Worldwide in 2012, lung cancer happened in 1.8 million individuals and brought about 1.6 million passings. This makes it the most widely recognized reason for cancer-related passing in men and second generally basic in ladies after breast cancer. The most widely recognized age at analysis is 70 years. In the United States, five years endurance rate is 19.4% while in Japan it is 41.4%. In developing countries, the average results are worse [5].Lung Cancer typesThe following figure 1 shows the types of lung cancer.