Anatomy of the Respiratory System
The respiratory system includes the nose, pharynx, larynx, trachea, and lungs.
Smoking and Respiratory Diseases
Smoking is directly responsible for the majority of lung cancer cases (87 percent), emphysema cases, and chronic bronchitis cases.
Statistics About Lung Cancer
Because no two people are alike, statistics can’t be used to predict what will happen to one person. The statistics below describe large groups of people. They do not take into account a person's own risk factors, such as family history, behaviors, or cancer screenings.
Lung Cancer: Symptoms
Lung cancer often does not cause symptoms in its early stages. In fact, many lung cancers do not cause symptoms until they have already spread.
People who have AIDS are much more likely to get certain types of cancer than people without the disease.
Carcinoid tumor is a rare type of tumor that grows slowly.