Cancer is a group of over one hundred diseases, characterized by abnormal uncontrolled cell-growth.
In a healthy body, cells grow, die and are replaced in a very controlled way.
Damage or change in the genetic material of cells by environmental or internal factors, sometimes results in cells that do not die and continue to multiply until a mass of cancer cells or a tumor develops.
Most cancer-related deaths are due to metastasis.
Malignant cells penetrate into the circulatory system and establish colonies in other parts of the body.
Great advancements have been made, but cancer is still the leading cause of death for people under the age of eighty five.
In the United States, one in every four people die from cancer.