The Cause Of Cancer
Cancer is the disease of the cells. It is an abnormal growth of cells, which tend to reproduce in an uncontrolled way and, in some cases, spread or metastasize. A cancerous growth or tumor is also known as a malignant growth or tumor. A growth or tumor, which is non-malignant is called benign. Such tumors are not cancer.
Cancer is not a single disease. It is a group of more than hundred different and distinctive diseases. It is not contagious. Cancer can involve any tissue of the body and have many different forms in each body area. Most cancers are named for the type of cell or organ in which they start. If a cancer spreads (metastasizes), the new tumor bears the same name as the original(primary) tumor.
Cancer is the Latin word for crab. The ancients used the word to mean a malignancy, doubtless because of the crab-like tenacity a malignant tumor sometimes seems to show in grasping the tissues it invades. Cancer may also be called malignancy, a malignant tumor, or a neoplasm (literally, a new growth).
In medicine, common term for neoplasms, or tumors, that are malignant is known as Cancer. Like benign tumors, malignant tumors do not respond to body mechanisms that limit cell growth. Unlike benign tumors, malignant tumors consist of undifferentiated, or unspecialized, cells that show an atypical cell structure and do not function like the normal cells from the organ from which they derive. Cancer cells, unlike normal cells, lack contact inhibition; cancer cells growing in laboratory tissue culture do not stop growing when they touch each other on a glass or other solid surface but grow in masses several layers deep.
Cancer results from mutations of certain genes that allow the cells to begin their uncontrolled growth. These mutations are either inherited or acquired. Acquired mutations are caused by repeated insults from triggers (e.g., cigarette smoke or ultraviolet rays) referred to as carcinogens. There is usually a latency period of years or decades between exposure to a carcinogen and the appearance of cancer. This, combined with the individual nature of susceptibility to cancer, makes it very difficult to establish a cause for many cancers.
The most significant avoidable carcinogens are the chemical components of tobacco smoke. Dietary components, like excessive consumption of alcohol or of foods high in fat and low in fiber rather than fruits and vegetables that contain antioxidants and necessary micronutrients, have also been linked with various cancers. Some cancers may be triggered by hormone imbalances. For example, some daughters of mothers who had been given DES (diethylstilbestrol) during pregnancy to prevent miscarriage developed vaginal adenocarcinomas as young women. Aflatoxins are natural mold byproducts that can cause cancer of the liver.
Certain carcinogens present occupational hazards. For example, in the asbestos industry, workers have a high probability of developing lung and colon cancer or a particularly virulent cancer of the mesothelium (the lining of the chest and abdomen). Benzene and vinyl chloride are other known industrial carcinogens.
Risk to humans from carcinogens depends upon the dose and a person's biologic susceptibility. Factors influencing a person's biological susceptibility to cancer include age, sex, immune status, nutritional status, genetics, and ethnicity.
by: canro dicausa
Mesothelioma: Treatments for Mesothelioma Cancer
Mesothelioma cancer is currently treated through three treatments, depending on the cancer location, the disease stage, and the patient's general health and age. These treatments are surgery, chemotherapy and radiation therapy, which sometimes are combined to fight the disease in so far as possible.
In a surgery, one of the most common treatments for mesothelioma, the doctor removes part of the lining of the abdomen or the chest and some tissue around it. In a pneumonectomy, the doctor may also remove one lung when the patient has pleural mesothelioma or cancer of the pleura. In other surgical procedure, the doctor may also remove part of the diaphragm, the muscle below the lungs that helps with breathing.
Through these procedures, the medical specialist shall try to excise tumourous tissue arising from this cancer disease. As these operations will reduce the patient's respiratory capacity, the surgeon will evaluate the patient's ability to function after a lung tissue removal, before performing a pneumonectomy.
Another method to fight Mesothelioma is chemotherapy or the use of anticancer drugs to kill cancer cells throughout the body. These drugs are given to the patient by an intravenous procedure, an injection into a vein. Currently, experts are studying the effectiveness of intracavitary chemotherapy or the possibility of giving chemotherapy straight to the chest or abdomen.
Radiotherapy or radiation therapy is the use of high-energy rays to destroy malignant cells and shrink tumors. It is important to know that this medical procedure attacks the cancer cells only in the treated area. There are two ways of giving this therapy. One, external radiation, in which the radiation comes from a machine, and other, internal radiation, where the cancer cells are found after putting materials that produce radiation into the affected area. Doctor's way to relieve patient's pain is to use a needle or a thin tube to drain fluid that has built up in the abdominal or chest cavities through a procedure called thoracentesis, when it is from the chest, and paracentesis, when the removal is from the abdomen. The specialists may also give the drugs through a tube in the chest to prevent the accumulation of more liquid.
Next Article: Mesothelioma new treatments
by: Hector Milla
Mesothelioma - The Cause Of Cancer
