Special fighter proteins made in the lab. Each one is made to target only one substance. They can be used in many ways, because they can find and connect to cancer cells wherever they are in the body. They can be used to find or treat cancer. Or they can be used to take drugs, toxins, or radioactive material straight to a cancer.
For more information, see Breastcancer.org's Targeted Therapies section.
Audio contributed by: Richard Roundtree