Cancer is a disease caused by the growth of body tissue cells are not normal. Cancer cells will grow rapidly, uncontrollable, and will continue to divide, then infiltrate into the surrounding tissue (invasive) and continue to spread through the connective tissue, blood.
and attack vital organs and spinal cord. Under normal circumstances, cells will only divide if there is replacement of cells that have died and broken. Instead cancer cells will divide continues even if the body does not need it, so it will happen accumulation of new cells are called malignant tumors. Stacking cells are urgent and damage normal tissue, thus disturbing the organs they occupy. Cancer can occur in various tissues in various organs in each body, from feet to head. When cancer occurs on the surface of the body, will be easily detected and treated. But if there is in the body, the cancer will be difficult to know, and sometimes - sometimes have no symptoms. If symptoms occur, they usually have an advanced stage that it is difficult to treat.
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