In lung cancer, these growths start in the lungs. This document describes mainly bronchial carcinoma, the more common type of lung cancer.
Lung cancer causes more cancer deaths in the U.S. than any other type of cancer.
Problems associated with this disease can include blocked breathing tubes and infection. Common sites of spread are the brain, the other lung, the liver, lymph nodes, and bone. Most lung cancers are related to smoking. In other, less common types of lung cancer, the cause is less well understood. Lung cancer may grow for a long time without producing any symptoms.