Understanding immunotherapy
Helping your immune system recognize cancer cells
The short version
Immunotherapy helps the immune system recognize and respond to cancer cells. For breast cancer, it's currently used mainly for some triple-negative cases, often combined with chemotherapy.
Immunotherapy works differently from chemotherapy or targeted therapy — instead of acting on the cancer cells directly, it helps your own immune system recognize and respond to them. For breast cancer, this currently applies mainly to some cases, often combined with chemotherapy, and sometimes depends on whether the tumor tests positive for a marker called .
A different kind of side effect
Because immunotherapy works through the immune system, side effects can be different from chemotherapy's — they can affect almost any organ (skin, gut, thyroid, lungs, and others), and can sometimes appear weeks after a dose.
Report new symptoms promptly
Tell your care team about any new or unusual symptom during immunotherapy — persistent diarrhea, new rash, shortness of breath, unusual fatigue, or others — even if it seems unrelated, since immune-related side effects are treated differently from other side effects and are usually easier to manage when caught early.
Questions you may want to ask
Am I a candidate for immunotherapy, and does my PD-L1 status affect that?
What symptoms should I report right away during treatment?
How is immunotherapy combined with my other treatments?