Anatomy of the Respiratory System
The respiratory system includes the nose, pharynx, larynx, trachea, and lungs.
Detailed information on lung cancer, lung cancer symptom, lung cancer treatment, lung cancer sign, lung cancer medication, malignant lung tumor, lung cancer cause, benign lung tumor, lung cancer risk factor, lung cancer prevention
Smoking and Respiratory Diseases
Smoking is directly responsible for the majority of lung cancer cases (87 percent), emphysema cases, and chronic bronchitis cases.
The Genetics of Lung Cancer
Ninety percent of lung cancers are caused by smoking, but not everyone who smokes will develop lung cancer. Researchers believe that normal genetic variations, known as polymorphisms, may make some people more likely to develop lung cancer if they smoke.
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.
How Lung Cancer Spreads