I have a cousin dying of lung cancer. She has been a heavy smoker most of her life. She has had chemotherapy twice and has elected to not take anymore. So unless the Lord heals her, the doctors do not give her any hope. Please keep her in your prayers. Because of her sickness, I have done some research of my own about lung cancer.
Lung cancer is the most deadly form of cancer in men and women and is most often associated with smoking. Although many times those in early stages do not exhibit symptoms, lung cancer symptoms include a cough or chest pain that doesn't go away, a wheezing breath, shortness of breath, coughing up blood, hoarseness, and swelling in the face and neck. Lung cancer diagnosis can be done with CT scans of the chest and biopsies of the lung. After diagnosis there are a number of lung cancer treatments depending on the patient's unique situation. If the cancer is in the early stages and has not spread to other parts of the body lung cancer surgery to remove the tumor and the parts of the lung affected by the cancer may be all required. If the cancer has spread chemotherapy and/or radiation therapy may be recommended. While other times both surgery and therapy may be recommended.
I found most of this good information at the website for the University of Maryland Greenebaum Cancer Center website. If you know someone suffering from this disease or other types of cancer, I suggest you reference this site for much easy to understand information.