Lung cancer is the uncontrolled growth of cells in the lung tissues. This uncontrolled growth can spread beyond the tissues of lungs to other parts of the body through a process known as metastasis. There are two main types of lung cancer, namely, small-cell lung carcinoma and non-small-cell lung carcinoma. Its symptoms are shortness of breath, coughing up blood, weight loss and chest pain. In most cases, the main cause of cancer is prolonged use of tobacco. Other risk factors can be a combination of genetic factors and exposure to radon gas, second-hand smoke, asbestos, and air pollution. There are various diagnostic techniques which can be used to diagnose lung cancer such as computed tomography scans, chest radiographs and biopsy. This book includes some of the vital pieces of work being conducted across the world, on various topics related to the clinical diagnosis and management of lung cancer. It will also provide interesting topics for research which interested readers can take up. This book is a complete source of knowledge on the present status of this important field.