Healthline, WebMD and MedicineNet offer photos of lung cancer, as seen on their websites. Healthline features a photograph of a lung cancer tumor and photos illustrating what lung cancer looks like in X-rays and computed tomography, or CT, scans.
As of 2015, lung cancer is the number one cause of cancer deaths among men and women, according to WebMD. Lung cancer often causes no symptoms during its early stages, but as the disease progresses, symptoms may include a persistent cough, chest pain, coughing up bloody phlegm, and shortness of breath or wheezing. Smoking causes nine out of 10 lung cancer deaths.