Cancer Free -
Causes. It is doubtful that it is involved in a process in the etiology of all types of cancer. The exact cause of the transformation of normal cells into cancer cells is not understood. An important factor is the constant change in the DNA of the cell and the following generations, but we don't know what triggers the change in the structure of DNA and why succumb to some people, cancer and others do not. Cell-mediated immunity is not doubt in part to its ability to stop the growth of cancer cells; It is considered by some of those who develop most develop many small cancers during their lives, but without clinical symptoms, because their mechanisms to destroy and prevent malignant cells as its replication. Oncologists and that environmental, biological and hereditary all factors play an important role in the development of cancer to identify (see table). Environmental issues must be at least 50 per cent and perhaps, in some species, as 80 percent of all cancers. Cigarette smoke is directly linked with, for example, about 90% of lung cancers. Industrial pollutants and radiation are dedicated to other carcinogens. Carcinogens are arsenic from mining and smelting industries; Insulation asbestos, on-site construction and plants; Benzene from petroleum refineries, solvents or insecticides and produced by the combustion of the coal in the industries of steel and petrochemical. Each year, the innovations that are probably carcinogenic manufactured by industrial enterprises. It is fear of the threats that these chemicals for those who represent the work of occupational and environmental medicine, or living near these facilities. UV light radiation is intense use or careless diagnostic and therapeutic procedures, x-rays and radioactive substances is also an important factor in the onset of cancer, especially of the skin, bone, bone marrow and thyroid. Synthetic hormones, especially estrogen administered to prevent abortion, are directly linked to certain cancers of the female reproductive organs. Viruses as agents in the development of cancer have experienced in the last years of intense research efforts. Epidemiological evidence is stronger than a relationship between the retrovirus and hepatocellular carcinoma and hepatitis B virus virus human T Lymphotropic (HTLV) Lymphoma-1 t. both have a geographical distribution of the prevalence of viral infection and cancer, as well as associations of the case. The association between the Epstein - Barr (EBV) virus and burkitt lymphoma cancer free meaning is also strong, but I think it is a necessity for such associated immunodeficiency caused by chronic malaria. They seem also the mapping between EBV and high degree of lymphoma in Western countries is necessary, in a State of immune, congenital weakness, or virus human immunodeficiency (HIV) or medications such as Cyclosporine. It is interesting to note that you can introduce new genetic material of the virus in a normal cell and turns into a malignant, and the proliferation of cells can be changed if interact you viruses with these carcinogenic substances such as chemicals and radiation. Recent studies have shown that the extracellular enzymes reverse transcriptase, plays an important role in the transmission of genetic information in the cell and then allows the reproduction of cancer cells. The incidence of cancer among certain populations suggests that other important factors for their development. We know, for example, that certain families show a high incidence of tumors among its members, but there was no exact hereditary tendency. There is also a high incidence of cancer among people who receive immunosuppression medications, but the cancer itself is immunosuppressive therapy. Proposes that persistent suppression of the immune response of the body to finally could compromise his ability to distinguish the altruistic and itself and therefore it cannot destroy malignant cells. If the cancer is configured to suppress the immune response, the result can satisfy the overwhelming demand on the body to destroy foreign cells that is ready at any time. Aging is another factor in the development of malignancy in account. Although it can occur at any age, cancer, older people are more vulnerable, perhaps because their powers are weakened and adaptability and more young people were exposed to carcinogens, while people. .