What is a PDL1 test?This test measures the amount of PDL1 on cancer cells. PDL1 is a protein that helps keep immune cells from attacking nonharmful cells in the body. Normally, the immune system fights foreign substances like viruses and bacteria, and not your own healthy cells. Some cancer cells have high amounts of PDL1. This allows the cancer cells to "trick" the immune system, and avoid being attacked as foreign, harmful substances.If your cancer cells have a high amount of PDL1, you may benefit from a treatment called immunotherapy. Immunotherapy is a therapy that boosts your immune system to help it recognize and fight cancer cells. Immunotherapy has been shown to be very effective in treating certain types of cancers. It also tends to have fewer side effects than other cancer therapies.Other names: programmed death-ligand 1, PD-LI, PDL-1 by immunohistochemistry (IHC)
