Cancer

Cancer
The cancer is a broad group of various diseases, all involving unregulated cell growth because our bodies are made up of millions of cells, grouped together to form tissues and organs suchas. Genes inside each cell order it to grow, work, reproduce and die. Our cells obey these orders and we remain healthy. But sometimes the instructions get mixed up, causing the cells to form lumps ortumours, or spread through the bloodstream and lymphatic system to other parts of the body and that mixed instructions is what we call cancer, that is the factor that make the cells stop growing andreproducing.
Cancer may be produced by environmental factors, genetics and chemicals. The most common environmental factors that contribute to cancers death is tobacco, obesity, infections, radiation,stress, lack of physical activity and environmental pollutants.
Most cancers are initially recognized either because of the appearance of signs or symptoms or through screening. Neither of these leadto a definitive diagnosis, which requires the examination of a tissue sample by a pathologist. These commonly include blood tests, X-rays, CT scans and endoscopy.
Cancer prevention is defined asactive measures to decrease the risk of cancer. The vast majority of cancer cases are due to environmental risk factors, and many, but not all, of these environmental factors are controllable lifestylechoices. Thus, cancer is considered a largely preventable disease. Greater than 30% of cancer deaths could be prevented by avoiding risk factors. Not all environmental causes are controllable, such asnaturally occurring background radiation, and other cases of cancer are caused through hereditary genetic disorders, and thus it is not possible to prevent all cases of cancer.
Cancer can be detectedin a number of ways, including the presence of certain signs and symptoms, screening tests, or medical imaging. Once a possible cancer is detected it is diagnosed by microscopic examination of...