Cancer immunotherapy is a treatment approach that uses or supports the body's immune system to recognize and respond to cancer cells. Different forms of immunotherapy work in different ways and may be used for specific cancer types or clinical situations. Common approaches include immune checkpoint inhibitors, T cell therapies, monoclonal antibodies, cancer vaccines, and immune system stimulators. Understanding these different types can help patients and families learn how immunotherapy fits into modern cancer care. Treatment decisions depend on factors such as cancer type, stage, previous treatments, overall health, and the characteristics of the cancer cells.
Cancer cells can sometimes avoid detection by the immune system or interfere with normal immune responses. Immunotherapy is designed to help the immune system identify cancer cells more effectively or strengthen certain immune activities. Unlike many traditional treatment approaches, immunotherapy focuses on interactions between the immune system and cancer. The available options vary depending on the type of cancer, individual medical factors, and treatment goals.
One of the most widely discussed forms of cancer immunotherapy is immune checkpoint inhibition. Immune checkpoints are natural parts of the immune system that help prevent immune cells from becoming overly active. Some cancer cells can use these checkpoint pathways to reduce immune responses against them. Checkpoint inhibitors are medicines designed to block certain checkpoint interactions, allowing immune cells to respond more actively to cancer cells.
Monoclonal antibodies are another important category. These laboratory developed proteins can be designed to recognize specific targets found on cancer cells or other cells involved in cancer growth. Some monoclonal antibodies directly support immune activity, while others may help the immune system identify cancer cells.
Key types include:
These treatments are used in selected cases of several cancers, but they can also cause immune related side effects because changes in immune activity may affect healthy tissues.
Cell based immunotherapies involve using immune cells as part of cancer treatment. CAR T cell therapy is one example. In this approach, a patient's T cells are collected and modified in a laboratory to recognize a particular target associated with cancer cells. The modified cells are then returned to the patient. This treatment has been used for certain blood cancers and continues to be studied for additional uses.
Cancer treatment vaccines differ from routine vaccines that are primarily designed to prevent infections. Therapeutic cancer vaccines aim to stimulate an immune response against cancer related targets. Researchers are also studying personalized vaccines that use information about an individual's cancer to help guide immune recognition.
Other immunotherapy approaches include substances that stimulate immune activity more broadly. These treatments may activate certain immune cells or strengthen immune signaling. Some may be used alone, while others are combined with surgery, radiation therapy, chemotherapy, targeted therapy, or other cancer treatments.
Important immunotherapy approaches include:
Cancer immunotherapy continues to develop as researchers learn more about how tumors interact with the immune system. Not every immunotherapy is suitable for every cancer or every individual. Testing, cancer characteristics, treatment history, and potential benefits and risks are important parts of treatment planning. A qualified oncology team can provide information about available treatment options and whether a particular form of immunotherapy may be relevant to a person's specific situation.