Cancer
From Simple English Wikipedia, the free encyclopedia
Cancer is a class of diseases or disorders that have uncontrolled division of cells in common. These cells are able to invade other biological tissues, either by growing into it or by implanting itself into distant sites by metastasis. Metastasis is defined as the stage in which cancer cells move through the bloodstream or lymphatic system. Cancer can affect anybody at any age, but people are more likely to get it as they get older because DNA damage becomes more apparent in aging DNA. It is one of the biggest and most researched causes of death in developed countries.
Cancer is a leading cause of death -- according to the World Health Organization, 12.5% of all deaths worldwide. Some things (whether controllable or uncontrollable) that can be causes or triggers of various types of cancer, include tobacco (smoked or smokeless), sunlight, radiation, including X-rays in large doses, chemicals used in construction and manufacturing (for example, asbestos and benzene), high-fat or low-fiber diets, air and water pollution, low fruit and vegetable intakes, overweight and obesity, not enough physical activity, drinking too much alcohol, and household use of some chemicals.
Although a cure has not been found yet, cancer can be partly treated using radiotherapy (also called radiation therapy), chemotherapy, or immunotherapy (also called biological therapy).
There are many different types of cancer - each have there own symptoms and causes. Some people can handle cancer better than others but to everyone it is harmful and can be fatal.
