Treatment trials test new treatments. New treatments for cancer may include a new cancer drug, new approaches to surgery or radiation therapy, new combinations of treatments, or new treatment methods such as immunotherapy.
Prevention trials test new approaches to cancer prevention. New approaches may include medicines, vitamins, minerals, or other supplements that doctors believe may lower the risk of a certain type of cancer. These trials look for the best way to prevent cancer in people who have never had cancer, prevent cancer from coming back or prevent a new cancer from occurring in people who have already had cancer.
Screening trials test the best way to find cancer, especially in its early stages.
Quality of life trials (also called supportive care trials) explore ways to improve comfort and quality of life for cancer patients.