Oncology is the study of cancer. An oncologist is a doctor who treats cancer. Usually, an oncologist manages a person’s care and treatment once he or she is diagnosed with cancer.
Cancer is the name given to a collection of related diseases. In all types of cancer, some of the body’s cells begin to divide without stopping and spread into surrounding tissues.
Cancer can start almost anywhere in the human body, which is made up of trillions of cells. Normally, human cells grow and divide to form new cells as the body needs them. When cells grow old or become damaged, they die, and new cells take their place.
When cancer develops, however, this orderly process breaks down. As cells become more and more abnormal, old or damaged cells survive when they should die, and new cells form when they are not needed. These extra cells can divide without stopping and may form growths called tumors.
There are many types of cancer treatment. The types of treatment that you receive will depend on the type of cancer you have and how advanced it is. Some people with cancer will have only one treatment. Most people have a combination of treatments, such as surgery with chemotherapy
and/or radiation therapy.
The field of oncology has three major areas: medical, surgical, and radiation.
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