Cancer is the uncontrolled growth of abnormal cells in the body. It develops when the body’s normal control mechanism ends or stops working. Old cells do not die and instead grow out of control, forming new, abnormal cells. These extra cells may form a mass of tissue, called a tumor. Some cancers, such as leukemia, do not form tumors.
Cancer treatment options is based on the type of cancer, its stage if cancer has spread and your general health. The goal of treatment is to kill as many cancerous cells even though reducing damage to normal cells nearby while advances in technology make all this probable.
The same cancer type in one person is very different from that cancer in another one. Within a particular type of cancer, such as breast cancer, researchers and doctors are noticing subtypes that each requires a different treatment approach.