Part one of term paper
The word Tumor simply means abnormal growth. Frequently this term is incorrectly used interchangeably with cancer. However, tumor may refer to a benign (non-cancerous) or malignant (cancerous) growth. Both benign and malignant result from the abnormal growth of cells. Normal cells reproduce in an order controlled fashion. In some body tissue ...

Part two of term paper
... Normally, new cells are produced at a controlled rate, keeping the overall number of cells nearly constant. Feedback mechanisms that stimulate or inhibit cell division regulate the growth of normal cells. However, in some cases, the body's normal regulatory control mechanisms are unable to stop the growth of cancer cells and this causes the development of a tumor. Whether or not the tumor will be cancerous or not is determined at this point by a process called differentiation. Differentiation i ...