NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,863 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

immunosuppressive agent
(IH-myoo-noh-suh-PREH-siv AY-jent)
An agent that decreases the body’s immune responses. It reduces the body’s ability to fight infections and other diseases, such as cancer. Immunosuppressive agents may be used to keep a person from rejecting a bone marrow or organ transplant. They are also used in the treatment of conditions marked by overactive immune responses, such as autoimmune diseases and allergies.