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Right now, is one of the most feared diseases in the world. In the early 1990s almost 6 million new cases developed and more than 4 million deaths from s occurred. Also more than one-fifth of all deaths were caused by and it has been predicted, by the American ....

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.... tissue and they invade normal tissue. Benign tissue is structured similar to normal tissue while malignant tissue is abnormal and has an unstructured appearance. Of greater importance, benign tissue does not metastasize, or begin to grow in other sites, like malignant tumors do. Cancer always refers to metastasized tumors but the term tumor is not always necessarily cancer. A tumor is any living tissue that is distinguishable as abnormal living tissue. After a cancer forms, it can also change from a benign to a malignant state, therefore making the cell grow at a more rapid rate. The development of the cell starts when it forms notable abnormalities i ....