This document discusses lung cancer, including causes, types, symptoms, diagnosis, stages, and treatment options. It notes that in Indonesia in 2012, there were 25,322 lung cancer cases in men and 9,374 in women. The main causes of lung cancer are smoking tobacco, radon exposure, asbestos, and other air pollutants. There are two main types of lung cancer: non-small cell lung cancer and small cell lung cancer. Treatment options include surgery, radiation, chemotherapy, and prevention through smoking cessation.