Cancer Prevention
♫ Saturday, June 28th, 2008Cancer is a class of diseases or disorders characterized by uncontrolled division of cells and the ability of these to spread, either by direct growth into adjacent tissue through invasion, or by implantation into distant sites by metastasis (where cancer cells are transported through the bloodstream or lymphatic system). Cancer may affect people at all ages, but risk tends to increase with age. There are many types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Severity of symptoms depends on the site and character of the malignancy and whether there is metastasis.
Cancer prevention is defined as active measures to decrease the incidence of cancer. Much of the promise for cancer prevention comes from observational epidemiologic studies that show associations between modifiable life style factors or environmental exposures and specific cancers. Use of exogenous hormones, exposure to ionizing radiation and ultraviolet radiation, certain occupational and chemical exposures, and infectious agents. Alcohol consumption, Smoking (although 20% of women with lung cancer have never smoked, versus 10% of men. Cancer however, compared with tobacco exposure, the magnitude of effect is modest or small and the strength of evidence is often weaker. Do not take the Alcohol and No Smoking.
