| Causes of Cancer |
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| Scientists have learned
that cancer is caused by changes (called alterations) in genes that
control normal cell growth and cell death. Certain lifestyle and environmental factors can change some normal genes into genes that allow the growth of cancer. Many genetic changes that lead to cancer are the result of tobacco use, diet, exposure to ultraviolet (UV) radiation from the sun, or exposure to carcinogens (cancer-causing substances) in the workplace and in the environment. Some gene alterations are inherited. However, having an inherited gene alteration does not mean that the person is certain to develop cancer; it means that the chance of getting cancer is increased. Scientists continue to examine the factors that may increase a person’s chance of developing cancer. Although being infected with certain viruses, such as the human papillomavirus (HPV) and human immunodeficiency virus (HIV), increases the risk of some types of cancer, cancer is not contagious. A person cannot catch cancer from someone who has the disease. Scientists also know that an injury or bruise does not cause cancer. Related Topics: What is Cancer? Important Facts About Cancer Cancer Signs & Symptoms Prevention of Cancer Treatments for Cancer Clinical Trials - Another Treatment Option Does Cancer Always Cause Pain? Source: National Cancer Institute |
| This fact sheet
describes some of the factors that have been identified as causes of
cancer. If you are concerned about possible cancer symptoms in yourself or
a family member, be sure to consult a physician or other health care
provider immediately. |
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| This document is
provided solely for educational and informational purposes. Be sure to consult your doctor before making any major medical decision. |
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