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Immunotherapy uses medicines to boost a person’s own immune system to recognize and destroy cancer cells more effectively. Immunotherapy typically works on specific proteins involved in the immune system to enhance the immune response. These drugs have side effects different from those of chemotherapy.
Some immunotherapy drugs, for example, monoclonal antibodies, work in more than one way to control cancer cells and may also be considered targeted drug therapy because they block a specific protein on the cancer cell to keep it from growing.
Immunotherapy is used to treat some types of salivary gland cancer.
An important part of the immune system is its ability to keep itself from attacking normal cells in the body. To do this, it uses proteins (or "checkpoints") on immune cells that need to be turned on (or off) to start an immune response. Salivary gland cancer cells sometimes use these checkpoints to avoid being attacked by the immune system. Drugs that target these checkpoint proteins, (called immune checkpoint inhibitors) can be used to treat some salivary gland cancers.
Pembrolizumab (Keytruda) is a drug that targets PD-1 (a protein on immune system T cells that normally helps keep them from attacking other cells in the body). By blocking PD-1, these drugs boost the immune response against cancer cells. This can often shrink tumors or slow their growth.
Pembrolizumab might be an option to treat some advanced salivary gland cancers, typically after other treatments have been tried or when no other good treatment options are available, and if the cancer cells have a high tumor mutational burden (TMB-H), meaning the cancer cells have many gene mutations. The tumor cells can be tested for these gene changes.
This drug is an intravenous (IV) infusion, and is typically given every 3 or 6 weeks.
Side effects of these drugs can include fatigue, cough, nausea, skin rash, poor appetite, constipation, and diarrhea.
Other, more serious side effects occur less often.
Infusion reactions: Some people might have an infusion reaction while getting these drugs. This is like an allergic reaction, and can include fever, chills, flushing of the face, rash, itchy skin, feeling dizzy, wheezing, and trouble breathing. It’s important to tell your doctor or nurse right away if you have any of these symptoms while getting these drugs.
Autoimmune reactions: These drugs remove one of the protections on the body's immune system. Sometimes the immune system starts attacking other parts of the body, which can cause serious or even life-threatening problems in the lungs, intestines, liver, hormone-making glands, kidneys, or other organs.
It’s very important to report any new side effects to your health care team quickly. If serious side effects do occur, treatment may need to be stopped and you may get high doses of corticosteroids to suppress your immune system.
Our team is made up of doctors and oncology certified nurses with deep knowledge of cancer care as well as journalists, editors, and translators with extensive experience in medical writing.
Laurie SA and Schiff B. Malignant salivary gland tumors: Treatment of recurrent and metastatic disease. In: Shah S, ed. UpToDate. Waltham, Mass.: UpToDate, 2021. https://www.uptodate.com. Accessed April 26, 2021.
Leeman JE, Katabi N, Wong, RJ, Lee NY, Romesser PB. Chapter 65 - Cancer of the Head and Neck. In: Niederhuber JE, Armitage JO, Doroshow JH, Kastan MB, Tepper JE, eds. Abeloff’s Clinical Oncology. 6th ed. Philadelphia, Pa: Elsevier; 2020.
Mendenhall WM, Dziegielewski PT, Pfister DG. Chapter 45- Cancer of the Head and Neck. In: DeVita VT, Lawrence TS, Rosenberg SA, eds. DeVita, Hellman, and Rosenberg’s Cancer: Principles and Practice of Oncology. 11th ed. Philadelphia, Pa: Lippincott Williams & Wilkins; 2019.
National Cancer Institute. Physician Data Query (PDQ). Salivary Gland Cancer: Treatment. 2019. Accessed at https://www.cancer.gov/types/head-and-neck/patient/adult/salivary-gland-treatment-pdq on April 25, 2021.
National Comprehensive Cancer Network (NCCN). NCCN Clinical Practice Guidelines in Oncology: Head and Neck Cancers. V.2.2021 – March 26, 2021. Accessed at www.nccn.org/professionals/physician_gls/pdf/head-and-neck.pdf on April 25, 2021.
Last Revised: March 18, 2022
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