There are more than 100 different types of cancer. The two main characteristics of cancer are uncontrolled growth of the cells in the human body and the ability of these cells to migrate from the original site and spread to distant sites.
Cancer is second only to heart disease as a leading cause of death in the United States. The American Cancer Society (ACS) estimated that approximately 1.8 million Americans would be diagnosed with cancer in 2020, and that 606,520 Americans would die that year from a new or previously diagnosed form of cancer. Overall, cancer deaths have declined in the United States over the past century, mainly due smoking cessation and early detection as well as more effective treatments....Read more