Cancer

Overview See All  Anatomy of the Respiratory System in Overview A detailed look at the respiratory system and how it works....more  Smoking and Respiratory Diseases in Overview Diseases caused by smoking kill more than 480,000 people in the U.S. each year. Here's a look at the risks linked to smoking, as well as information to help you quit. ...more  Lung Cancer: Symptoms in Overview Lung cancer often doesn't cause symptoms in its early stages. In fact, many lung cancers don't cause symptoms until they have already spread. ...more  AIDS-Related Cancers in Overview People who have AIDS are much more likely to get certain types of cancer than people without the disease. ...more  Carcinoid Tumor in Overview Carcinoid tumor is a rare type of tumor that grows slowly....more  Lung Nodules in Overview A lung nodule is a small growth on the lungs....more