Cancer is not one entity but instead a variety of related diseases. The fundamental aspect of cancer is that some of the body’s cells begin to divide beyond control and spread into surrounding tissues. Human cells normally grow and divide to form new cells as the body needs them and old or damaged cells are programmed to die. In cancer this control is lost and instead the cells continue to divide and thus form tumors.
There are many kinds of cancer treatment depending on the type of cancer and how advanced it is. Surgery, radiation therapy and chemotherapy have been used for decades to remove tumors.
During recent years, new targeted treatments such as immunotherapy have been developed. Immunotherapy is treatment that uses certain parts of a person’s own immune system to fight disease. This can be done by inducing, enhancing, or suppressing the immune response.